{"id":424088,"date":"2024-03-13T09:00:00","date_gmt":"2024-03-13T16:00:00","guid":{"rendered":"https:\/\/blog.webex.com\/uncategorized-ja\/%e3%83%aa%e3%82%a2%e3%83%ab%e3%82%bf%e3%82%a4%e3%83%a0%e3%83%a1%e3%83%87%e3%82%a3%e3%82%a2-%e3%83%93%e3%83%87%e3%82%aa%e5%85%a5%e9%96%80\/"},"modified":"2025-06-15T20:54:59","modified_gmt":"2025-06-16T03:54:59","slug":"real-time-media-a-primer-on-video","status":"publish","type":"post","link":"https:\/\/blog.webex.com\/ja\/engineering\/real-time-media-a-primer-on-video\/","title":{"rendered":"\u30ea\u30a2\u30eb\u30bf\u30a4\u30e0\u30e1\u30c7\u30a3\u30a2 | \u30d3\u30c7\u30aa\u5165\u9580"},"content":{"rendered":"\n<p>\u30ea\u30a2\u30eb\u30bf\u30a4\u30e0\u4f1a\u8b70\u306b\u95a2\u3059\u308b\u3053\u3061\u3089\u306e\u6700\u65b0\u306e\u30d6\u30ed\u30b0\u3067\u306f\u3001\u30d3\u30c7\u30aa\u306b\u95a2\u3059\u308b\u30a4\u30f3\u30b5\u30a4\u30c8\u3092\u3054\u7d39\u4ecb\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u6700\u65b0\u306e\u30b3\u30fc\u30c7\u30c3\u30af\u3092\u4f7f\u7528\u3057\u305f\u30d3\u30c7\u30aa\u306e\u30ea\u30a2\u30eb\u30bf\u30a4\u30e0\u5727\u7e2e\u306b\u3064\u3044\u3066\u7279\u306b\u8a00\u3048\u308b\u3053\u3068\u3067\u3059\u304c\u3001<strong>\u4e2d\u592e\u51e6\u7406\u88c5\u7f6e<\/strong>\uff08<strong>CPU<\/strong>\uff09\u306e\u30b3\u30b9\u30c8\u304c\u6df1\u523b\u306a\u5236\u7d04\u3068\u306a\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002 \u9ad8\u89e3\u50cf\u5ea6\u3001\u9ad8\u30d5\u30ec\u30fc\u30e0\u30ec\u30fc\u30c8\u306e\u30d3\u30c7\u30aa\u3092 CPU \u4e0a\u306e\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u3067\u5727\u7e2e\u3059\u308b\u306e\u306f\u304b\u306a\u308a\u9ad8\u6027\u80fd\u306a\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u3067\u3042\u3063\u3066\u3082\u96e3\u3057\u304f\u3001\u4e00\u822c\u306b\u30e2\u30d0\u30a4\u30eb\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3067\u306f\u5bfe\u5fdc\u3067\u304d\u307e\u305b\u3093\u3002 \u3053\u306e\u3088\u3046\u306a\u30b3\u30fc\u30c7\u30c3\u30af\u306f\u901a\u5e38\u3001GPU \u3092\u642d\u8f09\u3057\u3066\u3044\u308b\u30b7\u30b9\u30c6\u30e0\u3067\u5b9f\u884c\u3067\u304d\u307e\u3059\u3002\u305f\u3060\u3057\u3001\u6700\u3082\u4e00\u822c\u7684\u306a\u306e\u306f\u3001\u30b7\u30ea\u30b3\u30f3\u306b\u76f4\u63a5\u7d44\u307f\u8fbc\u307e\u308c\u3066\u3044\u308b\u30b5\u30dd\u30fc\u30c8\u3092\u4f7f\u7528\u3057\u3066\u30a8\u30f3\u30b3\u30fc\u30c9\u51e6\u7406\u3068\u30c7\u30b3\u30fc\u30c9\u51e6\u7406\u3092\u884c\u3046\u3068\u3044\u3046\u65b9\u5f0f\u3067\u3059\u3002\u305d\u306e\u5834\u5408\u3001\u6bd4\u8f03\u7684\u4f4e\u51fa\u529b\u306e\u30e2\u30d0\u30a4\u30eb\u30c7\u30d0\u30a4\u30b9\u3067\u3082\u300130fps \u4ee5\u4e0a\u306e\u9ad8\u89e3\u50cf\u5ea6\uff08HD\uff09\u30d3\u30c7\u30aa\u306e\u30c7\u30b3\u30fc\u30c9\u3068\u30a8\u30f3\u30b3\u30fc\u30c9\u304c\u53ef\u80fd\u3067\u3059\u3002 \u3064\u307e\u308a\u3001\u65b0\u305f\u306a\u30d3\u30c7\u30aa\u30b3\u30fc\u30c7\u30c3\u30af\u304c\u666e\u53ca\u3059\u308b\u304b\u3069\u3046\u304b\u306f\u591a\u304f\u306e\u5834\u5408\u3001\u4e3b\u8981\u306a\u30b7\u30ea\u30b3\u30f3\u30d9\u30f3\u30c0\u30fc\u304c\u30aa\u30f3\u30c1\u30c3\u30d7\u3067\u30b5\u30dd\u30fc\u30c8\u3057\u3066\u3044\u308b\u304b\u3067\u6c7a\u307e\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u5727\u7e2e<\/h2>\n\n\n\n<p>\u5727\u7e2e\u524d\u306e\u30d3\u30c7\u30aa\u306f\u81a8\u5927\u306a\u5e2f\u57df\u5e45\u3092\u5fc5\u8981\u3068\u3057\u307e\u3059\u3002<a href=\"https:\/\/blog.webex.com\/ja\/engineering\/what-is-real-time-media\/\" title=\"\u4ee5\u524d\u30d6\u30ed\u30b0\u3067\u7d39\u4ecb\">\u4ee5\u524d\u30d6\u30ed\u30b0\u3067\u7d39\u4ecb<\/a>\u3057\u305f\u3068\u304a\u308a\u30011080p30 \u306e\u30d3\u30c7\u30aa\u30b9\u30c8\u30ea\u30fc\u30e0 1 \u672c\u306e\u30d3\u30c3\u30c8\u30ec\u30fc\u30c8\u306f 1.5 \u30ae\u30ac\u30d3\u30c3\u30c8\u306b\u3082\u306a\u308a\u307e\u3059\u3002 \u3053\u306e\u3088\u3046\u306b\u3001\u30d3\u30c7\u30aa\u306e\u914d\u4fe1\u306b\u306f\u975e\u5e38\u306b\u9ad8\u30ec\u30d9\u30eb\u3067\u306e\u5727\u7e2e\u304c\u5fc5\u8981\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u753b\u50cf\u5727\u7e2e\u3001\u7279\u306b\u975e\u53ef\u9006\u5727\u7e2e\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u54c1\u8cea\u3092\u307b\u3068\u3093\u3069\u640d\u306a\u3046\u3053\u3068\u306a\u304f 10\uff1a1 \u3067\u5727\u7e2e\u3067\u304d\u307e\u3059\u304c\u3001\u5e2f\u57df\u5e45\u3092 15 \u5206\u306e 1 \u306b\u6e1b\u3089\u3057\u3066\u3082\u30011080p \u306e\u30b9\u30c8\u30ea\u30fc\u30e0\u306b\u306f 100Mbps \u304c\u5fc5\u8981\u3068\u306a\u308a\u307e\u3059\u3002 \u6700\u65b0\u306e\u30d3\u30c7\u30aa\u5727\u7e2e\u3067\u306f\u5b9f\u969b\u306e\u3068\u3053\u308d\u3001\u8a31\u5bb9\u3067\u304d\u308b\u54c1\u8cea\u306e\u30ec\u30d9\u30eb\u3092\u7dad\u6301\u3057\u306a\u304c\u3089\u30011080p30 \u30b9\u30c8\u30ea\u30fc\u30e0\u3092 4Mbps \u307e\u3067\u5727\u7e2e\u3067\u304d\u307e\u3059\u3002\u5727\u7e2e\u7387\u306f\u5b9f\u306b 375\uff1a1 \u3067\u3059\u3002<\/p>\n\n\n\n<p>\u306a\u305c\u3053\u306e\u3088\u3046\u306a\u3053\u3068\u304c\u5b9f\u73fe\u3067\u304d\u308b\u304b\u3068\u3044\u3046\u3068\u3001\u5727\u7e2e\u3055\u308c\u305f\u30d3\u30c7\u30aa\u306f\u5b9f\u969b\u306b\u306f\u3001\u5727\u7e2e\u3055\u308c\u305f\u9759\u6b62\u753b\u306e\u9023\u7d9a\u3067\u306f\u306a\u3044\u304b\u3089\u3067\u3059\u3002 \u30ea\u30a2\u30eb\u30bf\u30a4\u30e0\u3067\u5727\u7e2e\u3055\u308c\u305f\u30d3\u30c7\u30aa\u306f 2 \u7a2e\u985e\u306e\u30d5\u30ec\u30fc\u30e0\u3067\u69cb\u6210\u3055\u308c\u3066\u3044\u307e\u3059\u30021 \u3064\u306f <strong>I \u30d5\u30ec\u30fc\u30e0<\/strong>\uff08Intra-coded frames\uff09\u3067\u3001\u500b\u5225\u306b\u30c7\u30b3\u30fc\u30c9\u3067\u304d\u308b<em>\u5727\u7e2e\u753b\u50cf<\/em>\u3067\u3059\u304c\u3001\u901a\u5e38\u306f\u30d3\u30c7\u30aa\u30b9\u30c8\u30ea\u30fc\u30e0\u5185\u306e\u30d5\u30ec\u30fc\u30e0\u306e\u3054\u304f\u4e00\u90e8\u306b\u3059\u304e\u307e\u305b\u3093\u3002 I \u30d5\u30ec\u30fc\u30e0\u306f<strong>\u30ad\u30fc\u30d5\u30ec\u30fc\u30e0<\/strong>\u3068\u3082\u547c\u3070\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u3082\u3046 1 \u3064\u306f <strong>P \u30d5\u30ec\u30fc\u30e0<\/strong>\uff08Predicted frames\uff09\u3067\u3059\u3002\u753b\u50cf\u3092\u30a8\u30f3\u30b3\u30fc\u30c9\u3059\u308b\u306e\u3067\u306f\u306a\u304f\u3001\u73fe\u5728\u306e\u30d5\u30ec\u30fc\u30e0\u3068\u305d\u306e\u524d\u306e\u30d5\u30ec\u30fc\u30e0\u3068\u306e\u5909\u66f4\u90e8\u5206\u306e\u307f\u3092\u4fdd\u6301\u3057\u307e\u3059\u3002 \u73fe\u5728\u3068\u305d\u306e\u524d\u306e\u30d5\u30ec\u30fc\u30e0\u3068\u306e\u5dee\u5206\u3092\u30a8\u30f3\u30b3\u30fc\u30c9\u3059\u308b\u305f\u3081\u3001<strong>\u5dee\u5206\u30d5\u30ec\u30fc\u30e0<\/strong>\u3068\u3082\u547c\u3070\u308c\u307e\u3059\u3002 \u307b\u3068\u3093\u3069\u306e\u5834\u5408\u30012 \u3064\u306e\u30d3\u30c7\u30aa\u30d5\u30ec\u30fc\u30e0\u306e\u5dee\u5206\u306f\u308f\u305a\u304b\u3067\u3001\u901a\u5e38\u306f 33 \u30df\u30ea\u79d2\u3057\u304b\u9055\u3044\u307e\u305b\u3093\u3002\u3053\u306e\u305f\u3081\u3001<strong>P \u30d5\u30ec\u30fc\u30e0<\/strong>\u306f\u5b9f\u969b\u306e\u753b\u50cf\u3092\u30a8\u30f3\u30b3\u30fc\u30c9\u3059\u308b\u5834\u5408\u3088\u308a\u3082\u306f\u308b\u304b\u306b\u5c0f\u3055\u304f\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u3053\u306e\u3088\u3046\u306b\u3001\u30d3\u30c7\u30aa\u5727\u7e2e\u306f\u975e\u5e38\u306b\u52b9\u7387\u7684\u3067\u3059\u3002 \u3053\u306e\u65b9\u6cd5\u306e\u6b20\u70b9\u306f\u3001\u524d\u306e\u30d5\u30ec\u30fc\u30e0\u60c5\u5831\u306b\u4f9d\u5b58\u3057\u3066\u3044\u308b\u305b\u3044\u3067\u3001\u30d1\u30b1\u30c3\u30c8\u640d\u5931\u304c\u767a\u751f\u3057\u3066\u30d5\u30ec\u30fc\u30e0\u3092\u30c7\u30b3\u30fc\u30c9\u3067\u304d\u306a\u304f\u306a\u3063\u305f\u5834\u5408\u3001<em>\u305d\u308c\u4ee5\u964d\u306e\u30d5\u30ec\u30fc\u30e0<\/em>\u3082\u3059\u3079\u3066\u5f71\u97ff\u3092\u53d7\u3051\u3066\u3057\u307e\u3046\u3053\u3068\u3067\u3059\u3002 \u901a\u5e38\u3053\u308c\u3092\u89e3\u6c7a\u3059\u308b\u306b\u306f\u3001\u65b0\u3057\u3044 I \u30d5\u30ec\u30fc\u30e0\u306e\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u9001\u4fe1\u5074\u306b\u9001\u308a\u8fd4\u3059\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002 \u305d\u306e\u9593\u306b\u30c7\u30b3\u30fc\u30c0\u306f\u3001\u6700\u65b0\u306e\u6709\u52b9\u306a\u30d5\u30ec\u30fc\u30e0\u3067\u30d3\u30c7\u30aa\u3092\u505c\u6b62\u3059\u308b\u304b\u3001\u6b20\u843d\u3057\u3066\u3044\u308b\u30d5\u30ec\u30fc\u30e0\u306e\u5185\u5bb9\u3092\u63a8\u6e2c\u3057\u3066\u7d9a\u884c\u3092\u8a66\u307f\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u304c\u3001\u3053\u308c\u306b\u3088\u308a\u5947\u5999\u306a\u8996\u899a\u7684\u306a\u6b6a\u307f\u304c\u751f\u3058\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/blog.webex.com\/wp-content\/uploads\/2024\/07\/graphic-showing-how-single-data-loss-can-render-delta-frames-undecodable-ja.png\"><img decoding=\"async\" src=\"https:\/\/blog.webex.com\/wp-content\/uploads\/2024\/07\/graphic-showing-how-single-data-loss-can-render-delta-frames-undecodable-ja.png\" alt=\"1 \u3064\u306e\u5dee\u5206\u30d5\u30ec\u30fc\u30e0\u304c\u640d\u5931\u3059\u308b\u3068\u305d\u308c\u4ee5\u964d\u306e\u5dee\u5206\u30d5\u30ec\u30fc\u30e0\u304c\u30c7\u30b3\u30fc\u30c9\u3067\u304d\u306a\u304f\u306a\u308b\u3053\u3068\u3092\u793a\u3059\u56f3\" class=\"wp-image-420844\"\/><\/a><\/figure>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u30b3\u30fc\u30c7\u30c3\u30af<\/h2>\n\n\n\n<p>\u30cf\u30fc\u30c9\u30a6\u30a7\u30a2\u3067\u306e\u30b5\u30dd\u30fc\u30c8\u304c\u91cd\u8981\u3067\u3042\u308b\u3053\u3068\u3001\u307e\u305f\u7af6\u4e89\u529b\u306e\u3042\u308b\u30d3\u30c7\u30aa\u30b3\u30fc\u30c7\u30c3\u30af\u306e\u958b\u767a\u306b\u306f\u3001\u30aa\u30fc\u30c7\u30a3\u30aa\u30b3\u30fc\u30c7\u30c3\u30af\u306e\u958b\u767a\u3088\u308a\u9ad8\u3044\u30ec\u30d9\u30eb\u306e\u30a8\u30f3\u30b8\u30cb\u30a2\u30ea\u30f3\u30b0\u306e\u53d6\u308a\u7d44\u307f\u304c\u5fc5\u8981\u306a\u3053\u3068\u304c\u3001\u307b\u307c\u3059\u3079\u3066\u306e\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\u3067 10 \u5e74\u4ee5\u4e0a\u3082\u306e\u9593\u3001\u3042\u308b\u30d3\u30c7\u30aa\u30b3\u30fc\u30c7\u30c3\u30af\u304c\u72ec\u5360\u7684\u3067\u3042\u3063\u305f\u7406\u7531\u3067\u3059\u3002\u305d\u306e\u30b3\u30fc\u30c7\u30c3\u30af\u304c H.264 \u3067\u3059\u3002 H.264 \u306f 2004 \u5e74\u306b\u898f\u683c\u5316\u3055\u308c\u3001\u5e45\u5e83\u3044\u30cf\u30fc\u30c9\u30a6\u30a7\u30a2\u3067\u30b5\u30dd\u30fc\u30c8\u3055\u308c\u3066\u304a\u308a\u3001\u30ea\u30a2\u30eb\u30bf\u30a4\u30e0\u4f1a\u8b70\u306a\u3069\u3042\u3089\u3086\u308b\u30d3\u30c7\u30aa\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\u3067\u5e83\u304f\u4f7f\u7528\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u30d3\u30c7\u30aa\u4f1a\u8b70\u30b7\u30b9\u30c6\u30e0\u304c\u30b5\u30dd\u30fc\u30c8\u3059\u308b\u30b3\u30fc\u30c7\u30c3\u30af\u306f H.264 \u3060\u3051\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002 \u4ee5\u4e0b\u3067\u7d39\u4ecb\u3059\u308b\u3088\u3046\u306b\u3001\u4ed6\u306b\u3082\u5c11\u306a\u304f\u306a\u3044\u6570\u306e\u30b3\u30fc\u30c7\u30c3\u30af\u304c\u30ea\u30a2\u30eb\u30bf\u30a4\u30e0\u4f1a\u8b70\u30b7\u30b9\u30c6\u30e0\u3067\u30b5\u30dd\u30fc\u30c8\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p><strong>H.261<\/strong>\u3001<strong>H.263<\/strong>\u3001<strong>H.263+<\/strong> \u306f\u53e4\u3044\u30d3\u30c7\u30aa\u30b3\u30fc\u30c7\u30c3\u30af\u3067\u3059\u3002\u30d3\u30c3\u30c8\u30ec\u30fc\u30c8\u304c\u4e00\u5b9a\u306e\u5834\u5408\u3001H.264 \u3088\u308a\u3082 CPU \u30b3\u30b9\u30c8\u306f\u4f4e\u3044\u3082\u306e\u306e\u3001\u30d3\u30c7\u30aa\u306e\u54c1\u8cea\u304c\u4f4e\u304f\u306a\u308a\u307e\u3059\u3002\u975e\u5e38\u306b\u53e4\u3044\u30b7\u30b9\u30c6\u30e0\u3067\u306f\u3001\u76f8\u4e92\u904b\u7528\u6027\u306e\u305f\u3081\u306b\u3053\u308c\u3089\u3092 1 \u3064\u4ee5\u4e0a\u30b5\u30dd\u30fc\u30c8\u3059\u308b\u3053\u3068\u304c\u5fc5\u8981\u306a\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002 \u53e4\u3044\u30b7\u30b0\u30ca\u30ea\u30f3\u30b0\u30d7\u30ed\u30c8\u30b3\u30eb\u3067\u3042\u308b <strong>H.323<\/strong> \u3092\u30b5\u30dd\u30fc\u30c8\u307e\u305f\u306f\u76f8\u4e92\u52d5\u4f5c\u3059\u308b\u3088\u3046\u306b\u8a2d\u8a08\u3055\u308c\u3066\u3044\u308b\u30b7\u30b9\u30c6\u30e0\u3067\u306f H.261 \u306e\u30b5\u30dd\u30fc\u30c8\u304c\u7fa9\u52d9\u4ed8\u3051\u3089\u308c\u3066\u3044\u308b\u305f\u3081\u3001\u898f\u683c\u306b\u6e96\u62e0\u3059\u308b\u305f\u3081\u306b H.261 \u306e\u5b9f\u88c5\u304c\u5fc5\u8981\u306a\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p><strong>VP8 <\/strong> \u3068 <strong>VP9<\/strong> \u306f\u3001\uff08\u73fe\u5728\u306f\uff09Google \u793e\u304c\u4e3b\u5c0e\u3059\u308b\u4ee3\u66ff\u30d7\u30ed\u30c8\u30b3\u30eb\u3067\u3059\u3002\u30d1\u30c6\u30f3\u30c8\u30d5\u30ea\u30fc\u306e\u8a2d\u8a08\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u304c\u3001\u3053\u308c\u304c\u88c1\u5224\u3067\u901a\u7528\u3059\u308b\u304b\u306b\u3064\u3044\u3066\u306f\u8b70\u8ad6\u304c\u3042\u308a\u307e\u3059\u3002 VP8 \u306f H.264 \u306b\u4ee3\u308f\u308b\u7af6\u4e89\u529b\u306e\u3042\u308b\u30d7\u30ed\u30c8\u30b3\u30eb\u3068\u3057\u3066\u8a2d\u8a08\u3055\u308c\u307e\u3057\u305f\u304c\u3001\u52d5\u4f5c\u70b9\u306b\u95a2\u3057\u3066\u306f\u67d4\u8edf\u6027\u304c\u304b\u306a\u308a\u52a3\u308a\u307e\u3059\u3002 VP9 \u306f H.264 \u3088\u308a\u3082\u512a\u308c\u305f\u8a2d\u8a08\u3067\u3059\u304c\u3001H.265 \u3084 AV1 \u307b\u3069\u9ad8\u5ea6\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002 \u30d1\u30c6\u30f3\u30c8\u30d5\u30ea\u30fc\u306e\u30d3\u30c7\u30aa\u30b3\u30fc\u30c7\u30c3\u30af\u306f\u9b45\u529b\u7684\u3067\u3059\u3002\u3057\u304b\u3057\u30cf\u30fc\u30c9\u30a6\u30a7\u30a2\u3067\u30b5\u30dd\u30fc\u30c8\u3055\u308c\u3066\u304a\u3089\u305a\u3001\u307e\u305f Google \u793e\u4ee5\u5916\u3067\u30d1\u30c6\u30f3\u30c8\u30d5\u30ea\u30fc\u306e\u30b3\u30fc\u30c7\u30c3\u30af\u3092\u652f\u6301\u3057\u3066\u3044\u308b\u4e3b\u8981\u30c6\u30af\u30ce\u30ed\u30b8\u30fc\u4f01\u696d\u306b\u3088\u308b\u30b5\u30dd\u30fc\u30c8\u306f\u3001\u30d6\u30e9\u30a6\u30b6\u4ee5\u5916\u306e\u5206\u91ce\u3067\u306f\u9650\u3089\u308c\u3066\u3044\u307e\u3059\u3002\u30d6\u30e9\u30a6\u30b6\u3067\u306f Google Chrome \u306e\u512a\u4f4d\u6027\u3082\u3042\u308a\u3001\u4e00\u822c\u7684\u306b\u5229\u7528\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p><strong>H.265<\/strong> \u306f\u3001H.264 \u306e\u5f8c\u7d99\u3068\u3057\u3066\u8a2d\u8a08\u3055\u308c\u307e\u3057\u305f\u304c\u30012013 \u5e74\u306b\u898f\u683c\u5316\u3055\u308c\u305f\u306b\u3082\u304b\u304b\u308f\u3089\u305a\u3001\u305d\u306e\u5f8c\u306e 10 \u5e74\u9593\u3067\u305d\u306e\u666e\u53ca\u306f H.264 \u3088\u308a\u3082\u306f\u308b\u304b\u306b\u9045\u308c\u3066\u3044\u307e\u3059\u3002 \u3053\u308c\u306f\u6280\u8853\u7684\u306a\u554f\u984c\u3067\u306f\u306a\u304f\u3001\u4e3b\u306b\u6cd5\u7684\u307e\u305f\u306f\u8ca1\u653f\u7684\u306a\u554f\u984c\u3067\u3059\u3002H.265 \u306e\u30e9\u30a4\u30bb\u30f3\u30b9\u30b9\u30b1\u30b8\u30e5\u30fc\u30eb\u306f H.264 \u3088\u308a\u3082\u306f\u308b\u304b\u306b\u5f37\u6c17\u3067\u9ad8\u984d\u3067\u3059\u3002\u591a\u304f\u306e\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\u3067\u306f\u6841\u9055\u3044\u306e\u8cbb\u7528\u304c\u304b\u304b\u308a\u3001\u4f01\u696d\u306f\u81ea\u793e\u88fd\u54c1\u306e\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3054\u3068\u306b\u30e9\u30a4\u30bb\u30f3\u30b9\u6599\u3092\u652f\u6255\u3046\u4f59\u88d5\u304c\u3042\u308a\u307e\u305b\u3093\u3002 H.264 \u3068\u6bd4\u3079\u7279\u8a31\u306e\u72b6\u6cc1\u304c\u306f\u308b\u304b\u306b\u8907\u96d1\u306a\u306e\u3067\u3001\u4e00\u90e8\u306e\u4f01\u696d\u306f\u3001H.265 \u306e\u4f7f\u7528\u306b\u306f\u6cd5\u7684\u30ea\u30b9\u30af\u3082\u3042\u308b\u3068\u8003\u3048\u3066\u3044\u307e\u3059\u3002H.264 \u306b\u306f\u3001\u57fa\u672c\u7684\u306b\u3059\u3079\u3066\u306e\u7279\u8a31\u4fdd\u6709\u8005\u304c\u5c5e\u3059\u308b\u5358\u4e00\u306e\u30d1\u30c6\u30f3\u30c8\u30d7\u30fc\u30eb\u304c\u3042\u308b\u306e\u306b\u5bfe\u3057\u3001H.265 \u306b\u306f 3 \u3064\u306e\u72ec\u7acb\u3057\u305f\u30d1\u30c6\u30f3\u30c8\u30d7\u30fc\u30eb\u304c\u3042\u308a\u3001\u305d\u306e\u3044\u305a\u308c\u306b\u3082\u53c2\u52a0\u3057\u3066\u3044\u306a\u3044\u30d9\u30f3\u30c0\u30fc\u3082\u5b58\u5728\u3057\u307e\u3059\u3002 \u3068\u306f\u3044\u3048\u3001\u3042\u308b\u7a0b\u5ea6\u306e\u30aa\u30f3\u30c1\u30c3\u30d7 \u30cf\u30fc\u30c9\u30a6\u30a7\u30a2 \u30b5\u30dd\u30fc\u30c8\u3092\u5099\u3048\u3066\u3044\u308b\u306e\u3067\u3001\u7279\u5b9a\u306e\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\u306b\u306f\u9069\u3057\u3066\u3044\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u6700\u65b0\u306e\u30b3\u30fc\u30c7\u30c3\u30af\u3067\u6700\u3082\u5c06\u6765\u6709\u671b\u306a\u306e\u306f <strong>AV1<\/strong> \u3067\u3059\u3002 H.265 \u3068\u540c\u69d8\u306e\u5727\u7e2e\u7387\u3068 CPU \u30b3\u30b9\u30c8\u3067\u3059\u304c\u3001VP9 \u3068\u540c\u3058\u304f\u30d1\u30c6\u30f3\u30c8\u30d5\u30ea\u30fc\u306e\u8a2d\u8a08\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002 \u305f\u3060\u3057 AV1 \u306f\u3001VP9 \u3068\u6bd4\u3079\u696d\u754c\u5168\u4f53\u3067\u306f\u308b\u304b\u306b\u5e83\u7bc4\u306a\u652f\u6301\u3092\u53d7\u3051\u3066\u958b\u767a\u304c\u884c\u308f\u308c\u307e\u3057\u305f\u3002\u3064\u307e\u308a\u3001\u3088\u308a\u9ad8\u3044\u30ec\u30d9\u30eb\u3067\u8cdb\u540c\u3092\u5f97\u3066\u304a\u308a\u3001\u8457\u4f5c\u6a29\u4f7f\u7528\u6599\u7121\u6599\u306b\u3064\u3044\u3066\u3082\u5927\u304d\u304f\u4fe1\u983c\u3055\u308c\u3066\u3044\u307e\u3059\u3002 2018 \u5e74\u306b\u898f\u683c\u5316\u3055\u308c\u305f\u3070\u304b\u308a\u306a\u306e\u3067 AV1 \u306e\u5c0e\u5165\u306f\u307e\u3060\u9650\u5b9a\u7684\u3067\u3059\u304c\u3001\u30aa\u30f3\u30c1\u30c3\u30d7 \u30cf\u30fc\u30c9\u30a6\u30a7\u30a2 \u30b5\u30dd\u30fc\u30c8\u3092\u306f\u3058\u3081\u3068\u3057\u3066\u30b5\u30dd\u30fc\u30c8\u306f\u62e1\u5927\u3057\u3066\u304a\u308a\u3001\u6700\u7d42\u7684\u306b H.264 \u306b\u53d6\u3063\u3066\u4ee3\u308f\u308b\u5019\u88dc\u3068\u3057\u3066\u6700\u3082\u53ef\u80fd\u6027\u304c\u9ad8\u3044\u3068\u8003\u3048\u3089\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<div id=\"large-module-cont\"> <div id=\"large-module-left-cont\"> <span id=\"large-module-txt-span\"> <h1 id=\"large-module-head\">\u30aa\u30fc\u30c7\u30a3\u30aa\u306e\u57fa\u672c\u3092\u78ba\u8a8d<\/h1> <p id=\"large-module-p\">\u4ee5\u524d\u306e Rob \u306e\u30d6\u30ed\u30b0\u3067\u30aa\u30fc\u30c7\u30a3\u30aa\u306e\u57fa\u672c\u3092\u8aac\u660e\u3057\u3001\u30aa\u30fc\u30c7\u30a3\u30aa\u30b3\u30fc\u30c7\u30c3\u30af\u306e\u4e0a\u4f4d 6 \u3064\u3092\u6bd4\u8f03\u3057\u3066\u3044\u308b\u306e\u3067\u3054\u89a7\u304f\u3060\u3055\u3044\u3002 <\/p> <\/span> <button id=\"large-module-btn\" class=\"get-real-time-two\"> <p id=\"large-module-btn-txt\">\u30d1\u30fc\u30c8 2 \u3092\u898b\u308b<\/p> <a href=\"https:\/\/blog.webex.com\/ja\/engineering\/real-time-media-the-fundamentals-of-audio\/\"> <div id=\"large-module-arrow-div\"><\/div> <\/a> <\/button> <\/div> <div id=\"large-module-right-cont\"> <img decoding=\"async\" src=\"https:\/\/blog.webex.com\/wp-content\/uploads\/2024\/03\/sound-wave-on-pink-bg-promo-module.jpg\"\/> <\/div> <\/div>\n\n\n\n<h2 class=\"wp-block-heading\">H.264<\/h2>\n\n\n\n<p>\u30d3\u30c7\u30aa\u3092\u30a8\u30f3\u30b3\u30fc\u30c9\u3059\u308b\u969b\u3001\u307b\u3068\u3093\u3069\u306e\u30b3\u30fc\u30c7\u30c3\u30af\u3067\u306f\u3001\u30d5\u30ec\u30fc\u30e0\u3092<strong>\u30de\u30af\u30ed\u30d6\u30ed\u30c3\u30af<\/strong>\uff08\u500b\u3005\u306b\u307b\u307c\u72ec\u7acb\u3057\u3066\u3044\u308b\u51e6\u7406\u5358\u4f4d\uff09\u306b\u5206\u5272\u3057\u307e\u3059\u3002 \u8a73\u7d30\u306f\u3053\u3053\u3067\u306f\u8aac\u660e\u3057\u307e\u305b\u3093\u304c\u3001\u30b3\u30fc\u30c7\u30c3\u30af\u306b\u3088\u3063\u3066\u30de\u30af\u30ed\u30d6\u30ed\u30c3\u30af\u3092\u3055\u3089\u306b\u7d30\u5206\u5316\u3057\u3001\u7279\u5b9a\u306e\u5909\u63db\u3084\u4e88\u6e2c\u3092\u884c\u3046\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u30de\u30af\u30ed\u30d6\u30ed\u30c3\u30af\u3068\u89e3\u50cf\u5ea6<\/h3>\n\n\n\n<p>H.264 \u306e\u30de\u30af\u30ed\u30d6\u30ed\u30c3\u30af\u306f 16 \u00d7 16 \u306e\u6b63\u65b9\u5f62\u3067\u3001256 \u30d4\u30af\u30bb\u30eb\u306e\u30d6\u30ed\u30c3\u30af\u3067\u3059\uff08\u305f\u3060\u3057\u4e00\u90e8\u306e\u5185\u90e8\u64cd\u4f5c\u3067\u306f\u3001\u30de\u30af\u30ed\u30d6\u30ed\u30c3\u30af\u304c\u3082\u3063\u3068\u5c0f\u3055\u304f\u306a\u3063\u305f\u308a\u3001\u7d30\u5206\u5316\u3055\u308c\u305f\u308a\u3059\u308b\u3053\u3068\u3082\u3042\u308a\u307e\u3059\uff09\u3002 \u30d5\u30ec\u30fc\u30e0\u306e\u5883\u754c\u306f\u30de\u30af\u30ed\u30d6\u30ed\u30c3\u30af\u306e\u5883\u754c\u3067\u7d42\u308f\u308b\u5fc5\u8981\u304c\u3042\u308b\u305f\u3081\u3001H.264 \u3067\u30a8\u30f3\u30b3\u30fc\u30c9\u3055\u308c\u305f\u30d3\u30c7\u30aa\u306e\u30d4\u30af\u30bb\u30eb\u306e\u5e45\u3068\u9ad8\u3055\u306f 16 \u306e\u500d\u6570\u3067\u306a\u3051\u308c\u3070\u306a\u308a\u307e\u305b\u3093\u3002<\/p>\n\n\n\n<p>\u30de\u30af\u30ed\u30d6\u30ed\u30c3\u30af\u306f\u3001H.264 \u3067\u306f\u975e\u5e38\u306b\u57fa\u672c\u7684\u306a\u3082\u306e\u3067\u3059\u3002\u30b5\u30dd\u30fc\u30c8\u3055\u308c\u308b\u89e3\u50cf\u5ea6\u3092\u30cd\u30b4\u30b7\u30a8\u30fc\u30c8\u3059\u308b\u969b\u3001\u6700\u5927\u30d5\u30ec\u30fc\u30e0\u30b5\u30a4\u30ba\uff08max-fs\uff09\u306f\u30d4\u30af\u30bb\u30eb\u3067\u306f\u306a\u304f\u3001\u30de\u30af\u30ed\u30d6\u30ed\u30c3\u30af\u306e\u5408\u8a08\u3067\u8868\u308f\u3055\u308c\u307e\u3059\u3002 H.263 \u306e\u3088\u3046\u306a\u4ee5\u524d\u306e\u30b3\u30fc\u30c9\u3068\u306f\u9055\u3044\u3001H.264 \u3067\u306f\u30b5\u30dd\u30fc\u30c8\u3057\u3066\u3044\u308b\u89e3\u50cf\u5ea6\u3068\u7e26\u6a2a\u6bd4\u3092\u53d7\u4fe1\u5074\u304c\u793a\u3059\u5fc5\u8981\u306f\u3042\u308a\u307e\u305b\u3093\uff08\u6a5f\u80fd\u304c\u3042\u308a\u307e\u305b\u3093\uff09\u3002 H.264 \u306e\u53d7\u4fe1\u5074\u306f\u5358\u306b\u30d5\u30ec\u30fc\u30e0\u3042\u305f\u308a\u306e\u6700\u5927\u30de\u30af\u30ed\u30d6\u30ed\u30c3\u30af\u6570\u3092\u5358\u4e00\u306e\u6570\u5024\u3067\u8868\u3057\u3001\u305d\u306e\u6570\u4ee5\u4e0b\u306e\u30de\u30af\u30ed\u30d6\u30ed\u30c3\u30af\u3092\u542b\u3080\u6709\u52b9\u306a\u89e3\u50cf\u5ea6\u3092\u30c7\u30b3\u30fc\u30c9\u3057\u3066\u30ec\u30f3\u30c0\u30ea\u30f3\u30b0\u3067\u304d\u308b\u3053\u3068\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u3053\u3053\u3067\u306e\u554f\u984c\u306f\u3001\u4ed5\u69d8\u4e0a\u3001\u9001\u4fe1\u5074\u304c\u901a\u5e38\u3068\u7570\u306a\u308b\u7e26\u6a2a\u6bd4\u306e\u30d3\u30c7\u30aa\u3092\u9001\u4fe1\u3059\u308b\u3053\u3068\u304c\u8a31\u53ef\u3055\u308c\u308b\u3053\u3068\u3067\u3059\u30025 \u00d7 1 \u306e\u3088\u3046\u306a\u6975\u3081\u3066\u7570\u5e38\u306a\u7e26\u6a2a\u6bd4\u3067\u3082\u9001\u4fe1\u3055\u308c\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002 \u5b9f\u969b\u306b\u306f\u307b\u3068\u3093\u3069\u306e\u30c7\u30b3\u30fc\u30c0\u3067\u306f\u3001\u30d3\u30c7\u30aa\u3092\u30c7\u30b3\u30fc\u30c9\u3059\u308b\u305f\u3081\u306b\u5272\u308a\u5f53\u3066\u3089\u308c\u3066\u3044\u308b\u30b5\u30fc\u30d5\u30a7\u30b9\u306b\u306f\u6700\u5927\u306e\u9ad8\u3055\u3068\u5e45\u304c\u5b9a\u7fa9\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u6975\u7aef\u306a\u89e3\u50cf\u5ea6\u306f\u3053\u306e\u30b5\u30fc\u30d5\u30a7\u30b9\u306b\u53ce\u307e\u3089\u306a\u3044\u5834\u5408\u3082\u3042\u308a\u3001\u30c7\u30b3\u30fc\u30c9\u3067\u304d\u307e\u305b\u3093\u3002 \u76f8\u4e92\u904b\u7528\u6027\u3092\u8003\u616e\u3059\u308b\u5b9f\u88c5\u8005\u306f\u3001\u6a19\u6e96\u4ee5\u5916\u306e\u89e3\u50cf\u5ea6\u306e\u30b5\u30dd\u30fc\u30c8\u3092\u901a\u77e5\u3059\u308b\u4f55\u3089\u304b\u306e\u4ed5\u7d44\u307f\u304c\u306a\u3044\u9650\u308a\u3001\u305d\u3046\u3057\u305f\u89e3\u50cf\u5ea6\u306e\u9001\u4fe1\u306b\u306f\u6ce8\u610f\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u305d\u308c\u3068\u540c\u6642\u306b\u3001\u53d7\u4fe1\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\u59a5\u5f53\u306a\u7bc4\u56f2\u306e\u89e3\u50cf\u5ea6\u3092\u53d7\u4fe1\u3067\u304d\u308b\u3088\u3046\u3001\u30c7\u30b3\u30fc\u30c0\u3092\u6bd4\u8f03\u7684\u5f37\u56fa\u306b\u3059\u308b\u3053\u3068\u3082\u8ffd\u6c42\u3059\u3079\u304d\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u30d3\u30c7\u30aa\u4f1a\u8b70\u3067\u306f\u4e00\u822c\u7684\u306b\u3001\u30c6\u30ec\u30d3\u306e\u7e26\u6a2a\u6bd4\uff0816\uff1a9\uff09\u304c\u30e2\u30cb\u30bf\u30fc\u306e\u7e26\u6a2a\u6bd4\uff0816\uff1a10\uff09\u3088\u308a\u3082\u30b5\u30dd\u30fc\u30c8\u3055\u308c\u3066\u3044\u307e\u3059\u3002 \u4ee5\u524d\u306e\u30b3\u30fc\u30c7\u30c3\u30af\u3067\u306f\u30014\uff1a3 \u306e\u89e3\u50cf\u5ea6\u3092\u91cd\u8996\u3057\u3066\u3044\u307e\u3057\u305f\u304c\u3001 \u6700\u8fd1\u306e\u30b7\u30b9\u30c6\u30e0\u3067\u306f\u3001\u30dd\u30fc\u30c8\u30ec\u30fc\u30c8\u30d3\u30c7\u30aa\u306a\u3069\u5e45\u5e83\u3044\u7e26\u6a2a\u6bd4\u3092\u30b5\u30dd\u30fc\u30c8\u3059\u308b\u3088\u3046\u306b\u306a\u3063\u3066\u304d\u3066\u3044\u307e\u3059\u3002 \u5e45\u5e83\u3044\u30c7\u30d0\u30a4\u30b9\u304b\u3089\u5171\u6709\u3055\u308c\u308b\u30b3\u30f3\u30c6\u30f3\u30c4\u3084\u30d7\u30ec\u30bc\u30f3\u30c6\u30fc\u30b7\u30e7\u30f3\u30d3\u30c7\u30aa\u306e\u89e3\u50cf\u5ea6\u306f\u3055\u307e\u3056\u307e\u3067\u3001\u3053\u308c\u3092\u5f37\u529b\u306b\u30b5\u30dd\u30fc\u30c8\u3059\u308b\u3053\u3068\u306f\u975e\u5e38\u306b\u91cd\u8981\u3067\u3059\u3002\u307e\u305f\u3001\u9bae\u660e\u3067\u8aad\u307f\u3084\u3059\u3044\u30c6\u30ad\u30b9\u30c8\u3092\u78ba\u4fdd\u3059\u308b\u3046\u3048\u3067\u7279\u306b\u91cd\u8981\u306a\u306e\u304c\u3001\u5143\u306e\u89e3\u50cf\u5ea6\u3092\u53ef\u80fd\u306a\u9650\u308a\u7dad\u6301\u3059\u308b\u3053\u3068\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u8208\u5473\u6df1\u3044\u3053\u3068\u306b\u3001\u4e00\u822c\u7684\u306a HD \u89e3\u50cf\u5ea6\u3067\u3042\u308b 1080p\uff081920 \u00d7 1080\uff09\u306f\u3001\u6a19\u6e96\u306e H.264 \u3067\u306f\u30a8\u30f3\u30b3\u30fc\u30c9\u3067\u304d\u307e\u305b\u3093\u3002\u9ad8\u3055\u304c 1080 \u30d4\u30af\u30bb\u30eb\u306a\u306e\u3067\uff0816 \u3067\u5272\u308a\u5207\u308c\u305a\uff09\u30de\u30af\u30ed\u30d6\u30ed\u30c3\u30af\u306b\u5747\u7b49\u306b\u5206\u5272\u3067\u304d\u306a\u3044\u304b\u3089\u3067\u3059\u3002 \u3057\u305f\u304c\u3063\u3066\u30011080p \u306e H.264 \u30b3\u30f3\u30c6\u30f3\u30c4\u306f 1920 \u00d7 1072 \u307e\u305f\u306f 1920 \u00d7 1088 \u3068\u306a\u308a\u307e\u3059\u3002 \u3053\u308c\u306f\u30a2\u30c9\u30d0\u30bf\u30a4\u30b8\u30f3\u30b0\u3084\u9001\u53d7\u4fe1\u306e\u969b\u306b\u91cd\u8981\u3067\u3059\u30021080p \u3092\u30b5\u30dd\u30fc\u30c8\u3059\u308b\u5b9f\u88c5\u3067\u306f\u3001\u6700\u5927 1920 \u00d7 1088 \u306e\u30b5\u30dd\u30fc\u30c8\u3092\u30a2\u30c9\u30d0\u30bf\u30a4\u30ba\u3057\u30011920 \u00d7 1072 \u307e\u305f\u306f 1920 \u00d7 1088 \u306e\u53d7\u4fe1\u3092\u51e6\u7406\u3067\u304d\u308b\u3088\u3046\u306b\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002 \u9001\u4fe1\u6642\u306e\u5b9f\u88c5\u306f\u3001\u30a2\u30c9\u30d0\u30bf\u30a4\u30ba\u3055\u308c\u305f\u76f8\u624b\u5074\u306e\u6700\u5927\u5024\u3092\u8d85\u3048\u306a\u3044\u3088\u3046\u306b\u3057\u306a\u3051\u308c\u3070\u306a\u308a\u307e\u305b\u3093\u3002\u3064\u307e\u308a\u3001\u76f8\u624b\u5074\u304c\u30b5\u30dd\u30fc\u30c8\u3092\u30a2\u30c9\u30d0\u30bf\u30a4\u30ba\u3057\u305f\u6700\u5927\u5024\u304c 1920 \u00d7 1072 \u3067\u3042\u308c\u3070\u30011920 \u00d7 1088 \u3067\u306a\u304f 1920 \u00d7 1072 \u3092\u9001\u4fe1\u3059\u308b\u3088\u3046\u306b\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u30de\u30af\u30ed\u30d6\u30ed\u30c3\u30af\u306e\u6700\u5927\u30d5\u30ec\u30fc\u30e0\u30b5\u30a4\u30ba\uff08<strong>max-fs<\/strong>\uff09\u3092 8100 \u3068\u3057\u3066\u30a2\u30c9\u30d0\u30bf\u30a4\u30ba\u3059\u308b\u3088\u3046\u306b\u5b9f\u88c5\u3059\u308b\u5834\u5408\u3082\u3042\u308b\u3053\u3068\u306b\u6ce8\u610f\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u3053\u308c\u306f 1080p \u306b\u5fc5\u8981\u306a\u30de\u30af\u30ed\u30d6\u30ed\u30c3\u30af\u306e\u30b5\u30a4\u30ba\u3067\u3042\u308a\u3001\u5358\u7d14\u306a\u8a08\u7b97\uff08\uff081920 \u00d7 1080\uff09\/\uff0816 \u00d7 16\uff09\uff09\u3067\u6c42\u3081\u3089\u308c\u307e\u3059\u3002\u5b9f\u969b\u306b\u306f\u3001\u3053\u306e\u5b9f\u88c5\u3067\u306f\u30a2\u30c9\u30d0\u30bf\u30a4\u30ba\u3055\u308c\u305f max-fs \u5024\u3092\u8d85\u3048\u308b 1920 \u00d7 1088 \u3092\u51e6\u7406\u3067\u304d\u308b\u3053\u3068\u304c\u591a\u3044\u306e\u3067\u3059\u304c\u3001\u898f\u683c\u306b\u6e96\u62e0\u3059\u308b\u305f\u3081\u306b 1920 \u00d7 1072 \u3067\u9001\u4fe1\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u30d5\u30ec\u30fc\u30e0\u30ec\u30fc\u30c8<\/h3>\n\n\n\n<p>\u540c\u69d8\u306b H.264 \u306e\u30cd\u30b4\u30b7\u30a8\u30fc\u30b7\u30e7\u30f3\u3067\u306f\u3001\u6700\u5927\u30d5\u30ec\u30fc\u30e0\u30ec\u30fc\u30c8\u3067\u306f\u306a\u304f\u6700\u5927\u30de\u30af\u30ed\u30d6\u30ed\u30c3\u30af\/\u79d2\uff08max-mbps\uff09\u306e\u30cd\u30b4\u30b7\u30a8\u30fc\u30b7\u30e7\u30f3\u304c\u884c\u308f\u308c\u307e\u3059\u3002 max-fs \u306e\u7e26\u6a2a\u6bd4\u306e\u554f\u984c\u3068\u540c\u3058\u304f\u3001\u9ad8\u3044\u30d5\u30ec\u30fc\u30e0\u30ec\u30fc\u30c8\u3067\u4f4e\u3044\u89e3\u50cf\u5ea6\u3092\u9001\u4fe1\u3059\u308b\u3053\u3068\u306f\u9001\u4fe1\u5074\u306e\u4ed5\u69d8\u306e\u7bc4\u56f2\u5185\u3067\u3042\u308b\u3068\u3044\u3046\u7279\u6027\u3092\u6301\u3063\u3066\u3044\u307e\u3059\u3002 \u305f\u3068\u3048\u3070 720p \u306f\uff081280 \u00d7 720\uff09\/\uff0816 \u00d7 16\uff09= 3600 \u30de\u30af\u30ed\u30d6\u30ed\u30c3\u30af\u306b\u76f8\u5f53\u3057\u300130fps \u306e\u5834\u5408\u306f 108000<strong>mbps<\/strong> \u3068\u306a\u308a\u307e\u3059\u3002 \u305f\u3060\u3057 <strong>max-mbps <\/strong> \u3067\u306f\u300160fps \u4ee5\u4e0a\u3067 720 \u00d7 576 \u306e\u89e3\u50cf\u5ea6\u3001\u307e\u305f\u306f\u3055\u3089\u306b\u9ad8\u3044\u30d5\u30ec\u30fc\u30e0\u30ec\u30fc\u30c8\u3067\u305d\u308c\u4ee5\u4e0b\u306e\u89e3\u50cf\u5ea6\u3092\u9001\u4fe1\u3059\u308b\u3053\u3068\u3082\u53ef\u80fd\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u7e26\u6a2a\u6bd4\u306e\u554f\u984c\u3068\u540c\u69d8\u306b\u3001\u5b9f\u88c5\u3067\u4efb\u610f\u306e\u9ad8\u3044\u30d5\u30ec\u30fc\u30e0\u30ec\u30fc\u30c8\u306e\u53d7\u4fe1\u3092\u30b5\u30dd\u30fc\u30c8\u3059\u308b\u3053\u3068\u306f\u3001\u5b9f\u969b\u306b\u306f\u3081\u3063\u305f\u306b\u3042\u308a\u307e\u305b\u3093\u3002\u76f8\u4e92\u904b\u7528\u6027\u3092\u8003\u616e\u3059\u308b\u5b9f\u88c5\u8005\u306f\u3001\u9ad8\u3044\u30d5\u30ec\u30fc\u30e0\u30ec\u30fc\u30c8\u306e\u30b5\u30dd\u30fc\u30c8\u3092\u901a\u77e5\u3059\u308b\u4f55\u3089\u304b\u306e\u4ed5\u7d44\u307f\u304c\u306a\u3044\u9650\u308a\u300130fps \u3092\u8d85\u3048\u308b\u30d5\u30ec\u30fc\u30e0\u30ec\u30fc\u30c8\u306e\u9001\u4fe1\u306f\u907f\u3051\u308b\u3079\u304d\u3067\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u91cf\u5b50\u5316\u30d1\u30e9\u30e1\u30fc\u30bf<\/h3>\n\n\n\n<p>H.264 \u30b9\u30c8\u30ea\u30fc\u30e0\u306e\u9001\u4fe1\u306b\u5fc5\u8981\u306a\u30d3\u30c3\u30c8\u30ec\u30fc\u30c8\u306b\u5f71\u97ff\u3059\u308b\u5909\u6570\u306f\u3001\u89e3\u50cf\u5ea6\u3068\u30d5\u30ec\u30fc\u30e0\u30ec\u30fc\u30c8\u3060\u3051\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u30b3\u30fc\u30c7\u30c3\u30af\u306f\u3001<strong>\u91cf\u5b50\u5316\u30d1\u30e9\u30e1\u30fc\u30bf<\/strong>\uff08<strong>QP<\/strong>\uff09\u3092\u4f7f\u7528\u3057\u3066\u3001\u5727\u7e2e\u30d5\u30ec\u30fc\u30e0\u81ea\u4f53\u306e\u5fe0\u5b9f\u5ea6\uff08\u54c1\u8cea\uff09\u3092\u5909\u3048\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002 <strong>QP<\/strong> \u3068\u306f\u3001\u30b9\u30b1\u30fc\u30ea\u30f3\u30b0\u884c\u5217\u3092\u5c0e\u51fa\u3059\u308b\u306e\u306b\u4f7f\u7528\u3059\u308b\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3067\u3059\u3002<strong>QP<\/strong> \u5024\u304c\u5c0f\u3055\u3044\u307b\u3069\u3001\u30a8\u30f3\u30b3\u30fc\u30c0\u306f\u3088\u308a\u591a\u304f\u306e\u30b9\u30c6\u30c3\u30d7\u3092\u5b9f\u884c\u3059\u308b\u3053\u3068\u306b\u306a\u308b\u306e\u3067\u3001\u5143\u306e\u30d5\u30ec\u30fc\u30e0\u306e\u8a73\u7d30\u304c\u591a\u304f\u4fdd\u5b58\u3055\u308c\u307e\u3059\u3002\u305f\u3060\u3057\u305d\u306e\u5206\u3001\u3088\u308a\u591a\u304f\u306e\u30d3\u30c3\u30c8\u30ec\u30fc\u30c8\u304c\u5fc5\u8981\u3068\u306a\u308a\u307e\u3059\u3002 QP \u304c\u9ad8\u3044\u3068\u4f7f\u7528\u3059\u308b\u30b9\u30c6\u30c3\u30d7\u304c\u5927\u304d\u304f\u306a\u308a\u3001\u5fe0\u5b9f\u5ea6\u306e\u640d\u5931\u304c\u5897\u3048\u307e\u3059\u304c\u3001\u540c\u3058\u89e3\u50cf\u5ea6\u306e\u30d5\u30ec\u30fc\u30e0\u3092\u3088\u308a\u5c11\u306a\u3044\u30d3\u30c3\u30c8\u3067\u30a8\u30f3\u30b3\u30fc\u30c9\u3067\u304d\u307e\u3059\u3002 \u3057\u305f\u304c\u3063\u3066\u3001QP \u306b\u3088\u3063\u3066\u30a8\u30f3\u30b3\u30fc\u30c9\u306e\u54c1\u8cea\u7ba1\u7406\u304c\u3067\u304d\u308b\u3068\u8003\u3048\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u3064\u307e\u308a\u3001QP \u304c\u4f4e\u3044\u3068\u54c1\u8cea\u306f\u9ad8\u304f\u306a\u308a\u3001QP \u304c\u9ad8\u3044\u3068\u54c1\u8cea\u306f\u4f4e\u304f\u306a\u308b\u3068\u3044\u3046\u3053\u3068\u3067\u3059\u3002 QP \u5024\u304c\u9ad8\u3044\u3068\u3001\u660e\u3089\u304b\u306a\u5727\u7e2e\u30a2\u30fc\u30c6\u30a3\u30d5\u30a1\u30af\u30c8\u304c\u30d5\u30ec\u30fc\u30e0\u306b\u73fe\u308c\u3001\u307c\u3084\u3051\u3066\u898b\u3048\u305f\u308a\u3001\u30d6\u30ed\u30c3\u30af\u72b6\u306b\u898b\u3048\u305f\u308a\u3001\u6b6a\u3093\u3067\u898b\u3048\u305f\u308a\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<div>\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/blog.webex.com\/wp-content\/uploads\/2024\/07\/graphic-showing-how-single-data-loss-can-render-delta-frames-undecodable-fin-ja.png\"><img decoding=\"async\" src=\"https:\/\/blog.webex.com\/wp-content\/uploads\/2024\/07\/graphic-showing-how-single-data-loss-can-render-delta-frames-undecodable-fin-ja.png\" alt=\"\u7570\u306a\u308b\u5727\u7e2e\u7387\u3067\u5909\u63db\u3057\u305f\u753b\u50cf\uff1a2 \u3064\u3081\u306e\u753b\u50cf\u306f\u5727\u7e2e\u306e\u5f71\u97ff\u3092\u793a\u3059\u305f\u3081\u306b\u975e\u5e38\u306b\u9ad8\u3044\u30ec\u30d9\u30eb\u3067\u5727\u7e2e\u3057\u305f\u3082\u306e\u3092\u30a8\u30f3\u30b3\u30fc\u30c9\u3057\u3066\u3044\u307e\u3059\u3002\" class=\"wp-image-420855\"\/><\/a><\/figure>\n<p><i><a href=\"https:\/\/en.wikipedia.org\/wiki\/Compression_artifact#\/media\/File:Sego_lily_cm-150.png\" target=\"_blank\" rel=\"noopener\"><\/a><a href=\"https:\/\/en.wikipedia.org\/wiki\/Compression_artifact#\/media\/File:Sego_lily_cm-150.png\">CC BY-SA 3.0 \u306e\u753b\u50cf\uff08Wikipedia \u3088\u308a\uff09<\/a><\/i><\/p>\n<\/div>\n\n\n\n<p><\/p>\n\n\n\n<p>\u3057\u305f\u304c\u3063\u3066\u3001\u30a8\u30f3\u30b3\u30fc\u30c0\u304c\u7279\u5b9a\u306e\u6700\u5927\u30d3\u30c3\u30c8\u30ec\u30fc\u30c8\u3092\u76ee\u6a19\u3068\u3059\u308b\u5834\u5408\u3001\u5b9f\u88c5\u3067\u306f\u30d5\u30ec\u30fc\u30e0\u30ec\u30fc\u30c8\u3001\u89e3\u50cf\u5ea6\u3001\u54c1\u8cea\u306e\u9593\u3067\u59a5\u5354\u70b9\u3092\u898b\u3064\u3051\u306a\u3051\u308c\u3070\u306a\u308a\u307e\u305b\u3093\u3002 \u307b\u3068\u3093\u3069\u306e\u5b9f\u88c5\u3067\u306f\u3001\u76ee\u6a19\u3068\u3059\u308b\u30d3\u30c3\u30c8\u30ec\u30fc\u30c8\u306b\u5fdc\u3058\u3066\u30d5\u30ec\u30fc\u30e0\u30ec\u30fc\u30c8\u3068\u89e3\u50cf\u5ea6\u3092\u8a2d\u5b9a\u3057\u3001\u30a8\u30f3\u30b3\u30fc\u30c0\u304c\u76ee\u6a19\u54c1\u8cea\u3092\u9054\u6210\u3059\u308b\u306e\u306b\u6700\u9069\u306a <strong>QP<\/strong> \u3092\u9078\u629e\u3067\u304d\u308b\u3088\u3046\u306b\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u305f\u3060\u3057\u3001\u591a\u304f\u306e<strong>\u30ad\u30fc\u30d5\u30ec\u30fc\u30e0<\/strong>\u304c\u5fc5\u8981\u306a\u5834\u5408\uff08\u305f\u3068\u3048\u3070\u30d1\u30b1\u30c3\u30c8\u640d\u5931\u306b\u3088\u308a\u76f8\u624b\u5074\u304c\u983b\u7e41\u306b<strong>\u30ad\u30fc\u30d5\u30ec\u30fc\u30e0\u30ea\u30af\u30a8\u30b9\u30c8<\/strong>\u3092\u9001\u4fe1\u3057\u3066\u3044\u308b\u5834\u5408\uff09\u306f\u3001\u30a8\u30f3\u30b3\u30fc\u30c0\u306f\u89e3\u50cf\u5ea6\u3068\u30d5\u30ec\u30fc\u30e0\u30ec\u30fc\u30c8\u3092\u7dad\u6301\u3067\u304d\u308b\u7a0b\u5ea6\u306b\u9ad8\u3044 <strong>QP<\/strong> \u3092\u4f7f\u7528\u305b\u3056\u308b\u3092\u5f97\u305a\u3001\u30d3\u30c7\u30aa\u306e\u8996\u8a8d\u6027\u304c\u4f4e\u4e0b\u3057\u3066\u3001\u300c\u4e0d\u5747\u4e00\u306a\u300d\u54c1\u8cea\u306e\u539f\u56e0\u3068\u306a\u308a\u307e\u3059\u3002\u30a8\u30f3\u30b3\u30fc\u30c0\u304c\u4f4e\u54c1\u8cea\u306a <strong>I \u30d5\u30ec\u30fc\u30e0<\/strong>\u3057\u304b\u751f\u6210\u3067\u304d\u305a\u3001\u6b21\u306e<strong>\u5dee\u5206\u30d5\u30ec\u30fc\u30e0<\/strong>\u3067\u306f QP \u3092\u4e0b\u3052\u3089\u308c\u308b\u3082\u306e\u306e\u3001\u305d\u306e\u6b21\u306e<strong>\u30ad\u30fc\u30d5\u30ec\u30fc\u30e0<\/strong>\u3067\u306f\u518d\u3073 QP \u3092\u4e0a\u3052\u3056\u308b\u3092\u5f97\u306a\u3044\u304b\u3089\u3067\u3059\u3002 \u3053\u306e\u5f71\u97ff\u3092\u907f\u3051\u308b\u305f\u3081\u306b\u3001\u5b9f\u88c5\u3067\u306f <strong>QP<\/strong> \u306e\u4e0a\u9650\u306e\u8a2d\u5b9a\u3092\u3057\u305f\u65b9\u304c\u3088\u3044\u5834\u5408\u3082\u3042\u308a\u3001\u30d5\u30ec\u30fc\u30e0\u3092\u843d\u3068\u3059\uff08\u3064\u307e\u308a\u5b9f\u52b9\u30d5\u30ec\u30fc\u30e0\u30ec\u30fc\u30c8\u3092\u4e0b\u3052\u308b\uff09\u3053\u3068\u3067\u54c1\u8cea\u306e\u5909\u52d5\u304c\u76ee\u7acb\u305f\u306a\u3044\u3088\u3046\u306b\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u30d7\u30ed\u30d5\u30a1\u30a4\u30eb<\/h3>\n\n\n\n<p>H.264 \u898f\u683c\u3067\u306f\u3001\u6570\u591a\u304f\u306e\u30aa\u30d7\u30b7\u30e7\u30f3\u30c4\u30fc\u30eb\u3092\u5229\u7528\u3067\u304d\u307e\u3059\u3002 \u4e2d\u306b\u306f\u3001\u9ad8\u3044\u5fe0\u5b9f\u5ea6\u3092\u9054\u6210\u3059\u308b\u305f\u3081\u306b\u3001\u7279\u5b9a\u306e\u30d1\u30e9\u30e1\u30fc\u30bf\u306b\u8ffd\u52a0\u306e\u30d3\u30c3\u30c8\u3092\u5272\u308a\u5f53\u3066\u3089\u308c\u308b\u3082\u306e\u3082\u3042\u308a\u307e\u3059\u304c\u3001\u30ea\u30a2\u30eb\u30bf\u30a4\u30e0\u306e\u30e1\u30c7\u30a3\u30a2\u30a8\u30f3\u30b3\u30fc\u30c9\u3067\u4f7f\u7528\u3055\u308c\u308b\u3053\u3068\u306f\u307b\u3068\u3093\u3069\u3042\u308a\u307e\u305b\u3093\u3002 \u3088\u308a\u9069\u5207\u306a\u306e\u306f\u3001\u7279\u5b9a\u306e\u30d3\u30c3\u30c8\u30ec\u30fc\u30c8\u3067\u9ad8\u3044\u5fe0\u5b9f\u5ea6\u3092\u53ef\u80fd\u306b\u3059\u308b\u30c4\u30fc\u30eb\u3067\u3059\u304c\u3001CPU \u30b3\u30b9\u30c8\u306f\u304b\u306a\u308a\u9ad8\u304f\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u30c4\u30fc\u30eb\u306f\u3001\u30d3\u30c7\u30aa\u30b9\u30c8\u30ea\u30fc\u30e0\u304c\u4e00\u5ea6\u306b\u30a8\u30f3\u30b3\u30fc\u30c9\u3055\u308c\u305f\u5f8c\u3001\u591a\u6570\u306e\u53d7\u4fe1\u8005\u306b\u3088\u3063\u3066\u30c7\u30b3\u30fc\u30c9\u3055\u308c\u308b\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\uff08\u30b9\u30c8\u30ea\u30fc\u30df\u30f3\u30b0\u30e1\u30c7\u30a3\u30a2\u3084\u30c7\u30a3\u30b9\u30af\u30e1\u30c7\u30a3\u30a2\u306a\u3069\uff09\u3067\u306f\u5927\u304d\u306a\u4fa1\u5024\u304c\u3042\u308a\u307e\u3059\u304c\u3001\u30d3\u30c7\u30aa\u4f1a\u8b70\u306e\u5834\u5408\u306f\u60f3\u5b9a\u304c\u7570\u306a\u308a\u307e\u3059\u3002\u30d3\u30c7\u30aa\u4f1a\u8b70\u3067\u306f\u3001\u30a8\u30f3\u30b3\u30fc\u30c9\u306f\u30ea\u30a2\u30eb\u30bf\u30a4\u30e0\u306b\u884c\u308f\u308c\u308b\u5fc5\u8981\u304c\u3042\u308a\u3001\u5c11\u6570\u306e\u53d7\u4fe1\u8005\u306b\u3088\u3063\u3066\u306e\u307f\u30c7\u30b3\u30fc\u30c9\u3055\u308c\u308b\u304b\u3089\u3067\u3059\u3002 \u3053\u306e\u3088\u3046\u306a\u5834\u5408\u3001\u9ad8\u5ea6\u306a\u30c4\u30fc\u30eb\u3092\u30b5\u30dd\u30fc\u30c8\u3057\u3066\u3044\u306a\u3044\u5b9f\u88c5\u304c\u6570\u591a\u304f\u898b\u3089\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<p>H.264 \u3067\u306f\u3001\u3053\u308c\u3089\u3059\u3079\u3066\u306e\u30c4\u30fc\u30eb\u3092\u500b\u5225\u306b\u30cd\u30b4\u30b7\u30a8\u30fc\u30b7\u30e7\u30f3\u3059\u308b\u306e\u3067\u306f\u306a\u304f\u3001\u30c4\u30fc\u30eb\u306f\u30d7\u30ed\u30d5\u30a1\u30a4\u30eb\u306b\u307e\u3068\u3081\u3089\u308c\u3066\u3044\u3066\u3001\u5404\u5b9a\u7fa9\u6e08\u307f\u30d7\u30ed\u30d5\u30a1\u30a4\u30eb\u304c\u591a\u6570\u306e\u62e1\u5f35\u6a5f\u80fd\u3092\u30b5\u30dd\u30fc\u30c8\u3059\u308b\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002 \u30d3\u30c7\u30aa\u4f1a\u8b70\u306b\u4f7f\u7528\u3055\u308c\u308b H.264 \u306b\u4e3b\u306b\u95a2\u4fc2\u3059\u308b\u306e\u306f\u3001\u4ee5\u4e0b\u306e 3 \u3064\u306e\u30d7\u30ed\u30d5\u30a1\u30a4\u30eb\u3067\u3059\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Constrained Baseline<\/strong>\uff1aH.264 \u306e\u6700\u3082\u57fa\u672c\u7684\u306a\u5f62\u5f0f\u3067\u3042\u308a\u3001\u30aa\u30d7\u30b7\u30e7\u30f3\u306e\u62e1\u5f35\u6a5f\u80fd\u306f\u4e00\u5207\u3042\u308a\u307e\u305b\u3093\u3002 \u3053\u308c\u306f\u30d3\u30c7\u30aa\u4f1a\u8b70\u3067\u6700\u3082\u4e00\u822c\u7684\u306b\u30b5\u30dd\u30fc\u30c8\u3055\u308c\u3066\u3044\u308b\u30d7\u30ed\u30d5\u30a1\u30a4\u30eb\u3067\u3059\u3002\u76f8\u4e92\u904b\u7528\u6027\u3092\u8003\u616e\u3059\u308b\u5b9f\u88c5\u3067\u306f\u3001\u4ed6\u306e\u30d7\u30ed\u30d5\u30a1\u30a4\u30eb\u304c\u3042\u308b\u5834\u5408\u3082\u3001\u5e38\u306b H.264 \u306e <strong>Constrained Baseline<\/strong> \u3092\u30b5\u30dd\u30fc\u30c8\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>Main<\/strong>\uff1a\u3053\u306e\u30d7\u30ed\u30d5\u30a1\u30a4\u30eb\u306f\u4e3b\u306b <strong>CABAC<\/strong>\uff08<strong>Context Adaptive Baseline Arithmetic Coder<\/strong>\uff09\u306e\u30b5\u30dd\u30fc\u30c8\u3092\u8ffd\u52a0\u3059\u308b\u3082\u306e\u3067\u3059\u3002\u30a8\u30f3\u30b3\u30fc\u30c9\u306e CPU \u30b3\u30b9\u30c8\u304c\u7d04 50% \u5897\u3048\u308b\u4ee3\u308f\u308a\u306b\u3001\u4e00\u5b9a\u306e\u54c1\u8cea\u3067\u30d3\u30c3\u30c8\u30ec\u30fc\u30c8\u304c\u7d04 10% \u4e0b\u304c\u308a\u307e\u3059\u3002 \u30d3\u30c7\u30aa\u4f1a\u8b70\u3067\u306f\u3001<strong>Main <\/strong> \u30d7\u30ed\u30d5\u30a1\u30a4\u30eb\u3092\u30b5\u30dd\u30fc\u30c8\u3059\u308b\u5b9f\u88c5\u304c\u6570\u591a\u304f\u3042\u308a\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>High<\/strong>\uff1a<strong>Main <\/strong> \u306e\u30c4\u30fc\u30eb\u3068\u540c\u69d8\u306b\u8907\u6570\u306e\u30de\u30af\u30ed\u30d6\u30ed\u30c3\u30af\u306b\u307e\u305f\u304c\u308b\u30d5\u30ec\u30fc\u30e0\u5185\u4e88\u6e2c\u304c\u53ef\u80fd\u3067\u3001\u3084\u306f\u308a\u4e00\u5b9a\u306e\u54c1\u8cea\u3067\u30d3\u30c3\u30c8\u30ec\u30fc\u30c8\u3092\u4e0b\u3052\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u305f\u3060\u3057\u3001CPU \u30b3\u30b9\u30c8\u306f\u3055\u3089\u306b\u9ad8\u304f\u306a\u308a\u307e\u3059\u3002 \u30d3\u30c7\u30aa\u4f1a\u8b70\u3067\u306f\u3001<strong>High <\/strong> \u30d7\u30ed\u30d5\u30a1\u30a4\u30eb\u3092\u30b5\u30dd\u30fc\u30c8\u3059\u308b\u5b9f\u88c5\u306f\u307b\u3068\u3093\u3069\u3042\u308a\u307e\u305b\u3093\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u4ed6\u306b\u3082 <strong>Baseline <\/strong> \u30d7\u30ed\u30d5\u30a1\u30a4\u30eb\u304c\u3042\u308a\u3001\u4e00\u822c\u7684\u306b\u5229\u7528\u3055\u308c\u307e\u3059\u304c\u3001\u3053\u308c\u306f\u5b9f\u8cea\u7684\u306b\u306f Constrained Baseline \u30d7\u30ed\u30d5\u30a1\u30a4\u30eb\uff08CBP\uff09\u3068\u540c\u3058\u3082\u306e\u3067\u3059\u3002 CBP \u304c\u5b9a\u7fa9\u3055\u308c\u305f\u306e\u306f\u3001H.264 \u306e <strong>Baseline<\/strong> \u306e\u30cd\u30b4\u30b7\u30a8\u30fc\u30b7\u30e7\u30f3\u304c SIP\uff08Session Initiation Protocol\uff09\u3068 SDP\uff08Session Description Protocol\uff09\u3067\u78ba\u7acb\u3055\u308c\u305f\u3042\u3068\u3067\u3042\u308b\u3001\u3068\u3044\u3046\u6b74\u53f2\u7684\u306a\u7406\u7531\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u30b9\u30b1\u30fc\u30e9\u30d6\u30eb \u30d3\u30c7\u30aa \u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\uff08SVC\uff09<\/h3>\n\n\n\n<p>H.264 \u306e\u62e1\u5f35\u6a5f\u80fd\u3068\u3057\u3066\u306f\u3001\u4ed6\u306b\u3082\u30b9<strong>\u30b1\u30fc\u30e9\u30d6\u30eb \u30d3\u30c7\u30aa \u30b3\u30fc\u30c7\u30a3\u30f3\u30b0<\/strong>\uff08<strong>SVC<\/strong>\uff09\u304c\u3042\u308a\u307e\u3059\u3002 \u3053\u306e\u62e1\u5f35\u6a5f\u80fd\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u30a8\u30f3\u30b3\u30fc\u30c0\u306f 1 \u3064\u4ee5\u4e0a\u306e\u30b5\u30d6\u30b9\u30c8\u30ea\u30fc\u30e0\u3092\u542b\u3080\u30d3\u30c7\u30aa\u30b9\u30c8\u30ea\u30fc\u30e0\u3092\u751f\u6210\u3057\u307e\u3059\u3002\u3053\u308c\u306f\u3001\u30b9\u30c8\u30ea\u30fc\u30e0\u304b\u3089\u7279\u5b9a\u306e\u30d1\u30b1\u30c3\u30c8\u3092\u30c9\u30ed\u30c3\u30d7\u3059\u308b\u3053\u3068\u3067\u5f97\u3089\u308c\u307e\u3059\u3002 \u30a8\u30f3\u30b3\u30fc\u30c9\u3055\u308c\u305f\u30b9\u30c8\u30ea\u30fc\u30e0\u304c\uff08\u53d7\u4fe1\u80fd\u529b\u304c\u7570\u306a\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\uff09\u591a\u6570\u306e\u53d7\u4fe1\u8005\u306b\u9001\u4fe1\u3055\u308c\u308b\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\u3067\u6709\u76ca\u3067\u3059\u3002\u30b9\u30a4\u30c3\u30c1\u30f3\u30b0\u30b5\u30fc\u30d0\u30fc\u3067\u3001\u53d7\u4fe1\u80fd\u529b\u306e\u9ad8\u3044\u53d7\u4fe1\u8005\u306b\u306f\u3059\u3079\u3066\u306e\u30d1\u30b1\u30c3\u30c8\u3092\u8ee2\u9001\u3057\u3001\u4ed6\u306e\u53d7\u4fe1\u8005\u306b\u306f\u3001SVC \u30b9\u30c8\u30ea\u30fc\u30e0\u306e 1 \u3064\u4ee5\u4e0a\u306e\u30ec\u30a4\u30e4\u3092\u7834\u68c4\u3057\u3066\u30b5\u30d6\u30b9\u30c8\u30ea\u30fc\u30e0\u306e 1 \u3064\u3092\u4f4e\u3044\u30d3\u30c3\u30c8\u30ec\u30fc\u30c8\u3067\u8ee2\u9001\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<p>SVC \u306e\u30a8\u30f3\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u3067\u306f 3 \u7a2e\u985e\u306e\u30b5\u30d6\u30b9\u30c8\u30ea\u30fc\u30e0\u304c\u53ef\u80fd\u3067\u3059\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Temporal<\/strong>\uff1a\u5404\u30b5\u30d6\u30ec\u30a4\u30e4\u306f\u7570\u306a\u308b\u30d5\u30ec\u30fc\u30e0\u30ec\u30fc\u30c8\u306e\u30b9\u30c8\u30ea\u30fc\u30e0\u3092\u8868\u3057\u307e\u3059\u3002 \u305f\u3068\u3048\u3070\u3001\u524d\u306e\u30d5\u30ec\u30fc\u30e0\u3067\u306f\u306a\u304f\u305d\u306e\u524d\u306e\u30d5\u30ec\u30fc\u30e0\u304b\u3089 1 \u3064\u304a\u304d\u306b\u30d5\u30ec\u30fc\u30e0\u304c\u4e88\u6e2c\u3055\u308c\u308b\u3088\u3046\u306b\u3059\u308b\u3053\u3068\u3067\u300130fps \u306e\u30b9\u30c8\u30ea\u30fc\u30e0\u306b 15fps \u306e\u30b5\u30d6\u30ec\u30a4\u30e4\u3092\u542b\u3081\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002 \u3057\u305f\u304c\u3063\u3066\u3001\u30b5\u30fc\u30d0\u30fc\u306f\u4f55\u3082\u4e88\u6e2c\u3055\u308c\u306a\u3044 50% \u306e\u30d5\u30ec\u30fc\u30e0\u3092\u7834\u68c4\u3057\u3001\u898f\u683c\u306b\u6e96\u62e0\u3057\u305f 15fps \u306e\u30b9\u30c8\u30ea\u30fc\u30e0\u3092\u751f\u6210\u3057\u3066\u4e00\u90e8\u306e\u53d7\u4fe1\u8005\u306b\u9001\u4fe1\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002 \u5b9f\u88c5\u304c\u975e\u5e38\u306b\u7c21\u5358\u306a SVC \u30e2\u30fc\u30c9\u3067\u3042\u308a\u3001\u30d3\u30c7\u30aa\u4f1a\u8b70\u3067\u6700\u3082\u30b5\u30dd\u30fc\u30c8\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>Spatial<\/strong>\uff1a\u5404\u30b5\u30d6\u30ec\u30a4\u30e4\u306f\u7570\u306a\u308b\u89e3\u50cf\u5ea6\u306e\u30b9\u30c8\u30ea\u30fc\u30e0\u3092\u8868\u3057\u307e\u3059\u3002 Temporal \u306e\u62e1\u5f35\u6027\u3088\u308a\u3082\u304b\u306a\u308a\u8907\u96d1\u3067\u3042\u308a\u3001\u30d3\u30c7\u30aa\u4f1a\u8b70\u3067\u306f\u3042\u307e\u308a\u30b5\u30dd\u30fc\u30c8\u3055\u308c\u3066\u3044\u307e\u305b\u3093\u3002<\/li>\n\n\n\n<li><strong>Quality<\/strong>\uff1a\u5fe0\u5b9f\u5ea6\u307e\u305f\u306f SNR\uff08\u4fe1\u53f7\u5bfe\u96d1\u97f3\u6bd4\uff09\u306e\u62e1\u5f35\u6027\u3068\u3082\u547c\u3070\u308c\u3001\u5404\u30b5\u30d6\u30ec\u30a4\u30e4\u306f\u540c\u3058\u89e3\u50cf\u5ea6\u3068\u30d5\u30ec\u30fc\u30e0\u30ec\u30fc\u30c8\u3067\u3042\u3063\u3066\u3082\u3001\u54c1\u8cea\u304c\u7570\u306a\u308a\u307e\u3059\u3002 \u4e00\u822c\u7684\u306b\u306f\u3001SVC \u3067\u6700\u3082\u30b5\u30dd\u30fc\u30c8\u3055\u308c\u3066\u3044\u306a\u3044\u5f62\u5f0f\u3067\u3059\u3002<\/li>\n<\/ul>\n\n\n\n<p>SVC \u306f\u4e3b\u306b\u30011 \u3064\u306e\u30bd\u30fc\u30b9\u30b9\u30c8\u30ea\u30fc\u30e0\u3092\u8907\u6570\u306e\u53d7\u4fe1\u8005\u306b\u5207\u308a\u66ff\u3048\u308b\u5834\u5408\u306b\u4f7f\u7528\u3055\u308c\u308b\u305f\u3081\u3001\u73fe\u5728\u5e83\u304f\u5b9f\u88c5\u3055\u308c\u3066\u3044\u308b\u30d3\u30c7\u30aa\u4f1a\u8b70\u306e\u6a19\u6e96\u898f\u683c\u3067\u306f\u3042\u307e\u308a\u30b5\u30dd\u30fc\u30c8\u3055\u308c\u3066\u3044\u307e\u305b\u3093\u3002\u72ec\u81ea\u4ed5\u69d8\u306e\u30d3\u30c7\u30aa\u4f1a\u8b70\u30bd\u30ea\u30e5\u30fc\u30b7\u30e7\u30f3\u3067\u3088\u308a\u4e00\u822c\u7684\u306b\u898b\u3089\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<p>SVC \u306f\u30a8\u30f3\u30b3\u30fc\u30c9\u51e6\u7406\u306e\u52b9\u7387\u3092\u4f4e\u4e0b\u3055\u305b\u308b\u306e\u3067\u6ce8\u610f\u304c\u5fc5\u8981\u3067\u3059\u3002\u305f\u3068\u3048\u3070 15fps \u306e\u30b5\u30d6\u30ec\u30a4\u30e4\u3092\u542b\u3080 30fps \u30b9\u30c8\u30ea\u30fc\u30e0\u3092 SVC \u3067\u30a8\u30f3\u30b3\u30fc\u30c9\u3059\u308b\u5834\u5408\u3001\u540c\u3058\u89e3\u50cf\u5ea6\u3067\u540c\u3058\u304f 30fps \u306e\u30b9\u30c8\u30ea\u30fc\u30e0\u3092 SVC \u4ee5\u5916\u3067\u30a8\u30f3\u30b3\u30fc\u30c9\u51e6\u7406\u3059\u308b\u5834\u5408\u3068\u540c\u3058\u54c1\u8cea\u3092\u7dad\u6301\u3059\u308b\u305f\u3081\u306b\u306f\u3001\u308f\u305a\u304b\u306b\u9ad8\u3044\u30d3\u30c3\u30c8\u30ec\u30fc\u30c8\u304c\u5fc5\u8981\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u3053\u306e\u3088\u3046\u306b\u554f\u984c\u304c\u8907\u96d1\u3067\u3042\u308b\u3053\u3068\u304b\u3089\u3001\u30b5\u30a4\u30de\u30eb\u30ad\u30e3\u30b9\u30c8\u3067\u3053\u306e\u554f\u984c\u3092\u89e3\u6c7a\u3057\u3066\u3044\u308b\u5b9f\u88c5\u3082\u3042\u308a\u307e\u3059\u3002\u3064\u307e\u308a\u3001\u540c\u3058\u30b9\u30c8\u30ea\u30fc\u30e0\u306e\u8907\u6570\u306e\u72ec\u7acb\u3057\u305f\u30a8\u30f3\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u3092\u7570\u306a\u308b\u89e3\u50cf\u5ea6\/\u30d5\u30ec\u30fc\u30e0\u30ec\u30fc\u30c8\/\u54c1\u8cea\u3067\u30b9\u30a4\u30c3\u30c1\u30f3\u30b0\u30b5\u30fc\u30d0\u30fc\u306b\u9001\u4fe1\u3059\u308b\u3053\u3068\u306b\u3088\u308a\u3001\u5404\u53d7\u4fe1\u8005\u306b\u6700\u3082\u9069\u5207\u306a\u30a8\u30f3\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u3092\u8ee2\u9001\u3059\u308b\u3068\u3044\u3046\u65b9\u6cd5\u3067\u3059\u3002 \u305d\u306e\u7d50\u679c\u3001\u4e00\u822c\u7684\u306b\u30a2\u30c3\u30d7\u30b9\u30c8\u30ea\u30fc\u30e0\u5e2f\u57df\u3068\u30a8\u30f3\u30b3\u30fc\u30c9\u306e\u30b3\u30b9\u30c8\u306f\u9ad8\u304f\u306a\u308a\u307e\u3059\u304c\u3001\u5404\u53d7\u4fe1\u8005\u306e\u30c0\u30a6\u30f3\u30b9\u30c8\u30ea\u30fc\u30e0\u5e2f\u57df\u304c\u4f4e\u4e0b\u3057\u3001SVC \u306e\u30b5\u30dd\u30fc\u30c8\u306b\u4f34\u3046\u8907\u96d1\u3055\u3092\u56de\u907f\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u8907\u6570\u306e\u30b5\u30d6\u30b9\u30c8\u30ea\u30fc\u30e0\u306e\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u3067\u306f\u3001SVC \u3092\u4f7f\u7528\u3057\u306a\u3044 H.264 \u306f AVC\uff08Advanced Video Coding\uff09\u3068\u547c\u3070\u308c\u3066\u533a\u5225\u3055\u308c\u308b\u3053\u3068\u304c\u591a\u304f\u3001H.264 \u30b3\u30fc\u30c7\u30c3\u30af\u306e\u6b63\u5f0f\u540d\u79f0\u306e\u4e00\u90e8\u3068\u306a\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u30d1\u30b1\u30c3\u30c8\u5316\u30e2\u30fc\u30c9<\/h3>\n\n\n\n<p>\u6700\u7d42\u7684\u306b\u3001H.264 \u304c RTP \u3067\u9001\u4fe1\u3055\u308c\u308b\u5834\u5408\uff08\u5f8c\u63b2\u306e\u30d6\u30ed\u30b0\u3092\u53c2\u7167\uff09\u3001\u7279\u5b9a\u306e\u30d5\u30ec\u30fc\u30e0\u3092\u8907\u6570\u306e\u30d1\u30b1\u30c3\u30c8\u306b\u5206\u5272\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<strong>Maximum Transmission Unit<\/strong>\uff08<strong>MTU<\/strong>\uff09\u306b\u3088\u308b\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u5236\u9650\u3092\u8003\u616e\u3059\u308b\u3068\u3001\u30aa\u30fc\u30c7\u30a3\u30aa\u3068\u306f\u9055\u3063\u3066\u3001\u30d3\u30c7\u30aa\u30d5\u30ec\u30fc\u30e0\u304c 1 \u3064\u306e RTP \u30d1\u30b1\u30c3\u30c8\u306b\u53ce\u307e\u308b\u3053\u3068\u306f\u307b\u3068\u3093\u3069\u306a\u3044\u304b\u3089\u3067\u3059\u3002 H.264 \u3067\u306f\u3001\u8907\u6570\u306e<strong>\u30d1\u30b1\u30c3\u30c8\u5316\u30e2\u30fc\u30c9<\/strong>\u3092\u30b5\u30dd\u30fc\u30c8\u3057\u3066\u3044\u307e\u3059\u3002 \u30e2\u30fc\u30c9\u306e\u8a2d\u5b9a\u306f\u3001\u30a8\u30f3\u30b3\u30fc\u30c9\u51e6\u7406\u306e\u4e00\u90e8\u3068\u3057\u3066\u884c\u3046\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u5404<strong>\u30d1\u30b1\u30c3\u30c8\u5316\u30e2\u30fc\u30c9\u3067<\/strong>\u306f\u3001\u30d5\u30ec\u30fc\u30e0\u3092\u305d\u308c\u305e\u308c\u7279\u5b9a\u306e\u65b9\u6cd5\u3067\u30a8\u30f3\u30b3\u30fc\u30c9\u3059\u308b\u304c\u5fc5\u8981\u304c\u3042\u308b\u304b\u3089\u3067\u3059\u3002<\/p>\n\n\n\n<p>H.264 \u306b\u306f 3 \u3064\u306e\u30d1\u30b1\u30c3\u30c8\u5316\u30e2\u30fc\u30c9\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>0<\/strong>\uff1a\u6700\u3082\u30b7\u30f3\u30d7\u30eb\u306a\u30e2\u30fc\u30c9\u3067\u3001RTP \u30d1\u30b1\u30c3\u30c8\u306b\u306f\u5358\u4e00\u306e <strong>NAL \u30e6\u30cb\u30c3\u30c8<\/strong>\uff08<strong>NALU<\/strong>\uff09\u3057\u304b\u542b\u3081\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u305b\u3093\u3002\u3053\u308c\u306f\u3001H.264 \u306e\u5185\u90e8\u69cb\u9020\u3067\u3059\u3002 \u5b9f\u88c5\u306f\u7c21\u5358\u3067\u3042\u308a\u3001\u76f8\u4e92\u904b\u7528\u6027\u3092\u8003\u616e\u3057\u305f\u5b9f\u88c5\u3067\u306f\u3001\u901a\u5e38\u306f<strong>\u30d1\u30b1\u30c3\u30c8\u5316\u30e2\u30fc\u30c9 0<\/strong> \u306e\u30b5\u30dd\u30fc\u30c8\u304c\u5fc5\u8981\u3067\u3059\u3002<\/li>\n\n\n\n<li><strong>1<\/strong>\uff1a\u3053\u306e\u30e2\u30fc\u30c9\u3067\u306f\u3001\u8907\u6570\u306e\u30d1\u30b1\u30c3\u30c8\u306b <strong>NALU <\/strong> \u3092\u542b\u3081\u308b\u3053\u3068\u304c\u3067\u304d\u3001\u540c\u3058\u30d3\u30c3\u30c8\u30ec\u30fc\u30c8\u306e\u5834\u5408\u3001\u4e00\u822c\u7684\u306b\u30e2\u30fc\u30c9 0 \u3088\u308a\u3082\u5727\u7e2e\u52b9\u7387\u304c\u3088\u304f\u306a\u308a\u307e\u3059\u3002 \u30d3\u30c7\u30aa\u4f1a\u8b70\u3067\u6700\u3082\u5e83\u304f\u4f7f\u7528\u3055\u308c\u3066\u3044\u308b<strong>\u30d1\u30b1\u30c3\u30c8\u5316\u30e2\u30fc\u30c9<\/strong>\u3067\u3042\u308a\u3001\u5b9f\u88c5\u3067\u306f<strong>\u30d1\u30b1\u30c3\u30c8\u5316\u30e2\u30fc\u30c9 1<\/strong> \u3092\u78ba\u5b9f\u306b\u30b5\u30dd\u30fc\u30c8\u3057\u3001\u30cd\u30b4\u30b7\u30a8\u30fc\u30b7\u30e7\u30f3\u3059\u308b\u3088\u3046\u63a8\u5968\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>2<\/strong>\uff1a\u6700\u3082\u8907\u96d1\u306a\u30e2\u30fc\u30c9\u3067\u3059\u3002H.264 \u3092\u4f7f\u7528\u3057\u305f\u30d3\u30c7\u30aa\u4f1a\u8b70\u3067\u30b5\u30dd\u30fc\u30c8\u307e\u305f\u306f\u30cd\u30b4\u30b7\u30a8\u30fc\u30b7\u30e7\u30f3\u3055\u308c\u308b\u3053\u3068\u306f\u307b\u307c\u3042\u308a\u307e\u305b\u3093\u3002<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">H.264 \u306e\u30e9\u30a4\u30bb\u30f3\u30b9<\/h3>\n\n\n\n<p>\u5e83\u304f\u666e\u53ca\u3057\u3066\u3044\u308b\u5370\u8c61\u304c\u3042\u308a\u307e\u3059\u304c\u3001H.264 \u306f\u7121\u6599\u3067\u5b9f\u88c5\u3057\u305f\u308a\u5229\u7528\u3057\u305f\u308a\u3067\u304d\u308b\u308f\u3051\u3067\u306f<em>\u3042\u308a\u307e\u305b\u3093<\/em>\u3002 H.264 \u306b\u95a2\u9023\u3059\u308b\u7279\u8a31\u3092\u6301\u3064\u4f01\u696d\u306f\u3001MPEG LA \u3068\u3044\u3046\u7d44\u7e54\u306e\u4e0b\u306b\u30d1\u30c6\u30f3\u30c8\u30d7\u30fc\u30eb\u3092\u8a2d\u7acb\u3057\u3066 H.264 \u30e9\u30a4\u30bb\u30f3\u30b9\u306b\u95a2\u3059\u308b\u898f\u5247\u3068\u6599\u91d1\u3092\u8a2d\u5b9a\u3057\u3001\u53ce\u76ca\u3092\u56de\u53ce\u3057\u3066\u69cb\u6210\u54e1\u306b\u914d\u5206\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p>2010 \u5e74\u3001MPEG LA \u306f\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u7d4c\u7531\u3067\u9001\u4fe1\u3055\u308c\u308b H.264 \u30d3\u30c7\u30aa\u306e\u30e9\u30a4\u30bb\u30f3\u30b9\u3092\u5ec3\u6b62\u3057\u307e\u3057\u305f\u3002YouTube \u306a\u3069\u306e\u30a8\u30f3\u30c9\u30e6\u30fc\u30b6\u30fc\u306e\u5834\u5408\u306f\u7121\u6599\u3067\u3059\u304c\u3001\u30d3\u30c7\u30aa\u4f1a\u8b70\u306a\u3069\u4ed6\u306e\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\u3067\u306f\u3044\u307e\u3060\u8ab2\u91d1\u3055\u308c\u3066\u3044\u307e\u3059\u3002 \u305f\u3060\u3057\u30011 \u3064\u306e\u4e8b\u696d\u4f53\u304c\u5e74\u9593\u306b\u652f\u6255\u3046\u984d\u306e\u4e0a\u9650\u304c\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u307e\u3059\u30022013 \u5e74\u304b\u3089<a href=\"https:\/\/www.cisco.com\/\" target=\"_blank\" rel=\"noopener\" title=\"\u30b7\u30b9\u30b3\">\u30b7\u30b9\u30b3<\/a>\u306f <a href=\"https:\/\/www.openh264.org\/\" target=\"_blank\" rel=\"noopener\" title=\"openh264\">openh264<\/a> \u3068\u3044\u3046\u30aa\u30fc\u30d7\u30f3\u30bd\u30fc\u30b9\u30b3\u30fc\u30c7\u30c3\u30af\u306e\u30d7\u30ea\u30b3\u30f3\u30d1\u30a4\u30eb\u7248\u3092\u5229\u7528\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002\u30b7\u30b9\u30b3\u306f MPEG LA \u306b\u4e0a\u9650\u984d\u3092\u652f\u6255\u3063\u3066\u3044\u308b\u306e\u3067\u3001\u5546\u7528\u3082\u542b\u3081\u3069\u306e\u3088\u3046\u306a\u5b9f\u88c5\u3067\u3082\u7121\u6599\u3067\u7d71\u5408\u3067\u304d\u307e\u3059\u3002 \u3060\u304b\u3089\u3053\u305d Firefox \u306a\u3069\u306e\u30aa\u30fc\u30d7\u30f3\u30bd\u30fc\u30b9\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u88fd\u54c1\u3067 H.264 \u3092\u30b5\u30dd\u30fc\u30c8\u3067\u304d\u308b\u306e\u3067\u3059\u304c\u3001\u305d\u3046\u3067\u3082\u306a\u3051\u308c\u3070\u30e9\u30a4\u30bb\u30f3\u30b9\u8cbb\u7528\u306e\u652f\u6255\u3044\u306b\u82e6\u52b4\u3059\u308b\u3067\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<p>\u6ce8\u610f\u3059\u3079\u304d\u306a\u306e\u306f\u3001<strong>openh264 <\/strong> \u3092\u4f7f\u7528\u3057\u305f\u5b9f\u88c5\u3067\u30e9\u30a4\u30bb\u30f3\u30b9\u6599\u3092\u652f\u6255\u308f\u306a\u304f\u3066\u3082\u3059\u3080\u3088\u3046\u306b\u3001\u7d71\u5408\u3059\u308b\u969b\u306b\u7279\u5b9a\u306e\u624b\u9806\u306b\u5f93\u3046\u5fc5\u8981\u304c\u3042\u308b\u3053\u3068\u3067\u3059\u3002\u30e9\u30a4\u30bb\u30f3\u30b9\u6599\u3092\u652f\u6255\u3046\u5fc5\u8981\u304c\u306a\u3044\u3088\u3046\u306b\u3001\u624b\u9806\u3092\u9075\u5b88\u3059\u308b\u3088\u3046\u306b\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n\n<p><strong>Webex \u306b\u95a2\u3059\u308b\u305d\u306e\u4ed6\u306e\u8a18\u4e8b\uff1a<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/blog.webex.com\/ja\/engineering\/what-is-real-time-media\/\" title=\"\u30ea\u30a2\u30eb\u30bf\u30a4\u30e0\u30e1\u30c7\u30a3\u30a2 | \u30d3\u30c7\u30aa\u4f1a\u8b70\u306e\u8ab2\u984c\u3068\u306f\">\u30ea\u30a2\u30eb\u30bf\u30a4\u30e0\u30e1\u30c7\u30a3\u30a2 | \u30d3\u30c7\u30aa\u4f1a\u8b70\u306e\u8ab2\u984c\u3068\u306f<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/blog.webex.com\/ja\/engineering\/real-time-media-the-fundamentals-of-audio\/\" title=\"\u30ea\u30a2\u30eb\u30bf\u30a4\u30e0\u30e1\u30c7\u30a3\u30a2 | \u30aa\u30fc\u30c7\u30a3\u30aa\u306e\u57fa\u672c&nbsp;&nbsp;\">\u30ea\u30a2\u30eb\u30bf\u30a4\u30e0\u30e1\u30c7\u30a3\u30a2 | \u30aa\u30fc\u30c7\u30a3\u30aa\u306e\u57fa\u672c <\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/blog.webex.com\/workspaces\/work-smarter-with-webex-suite\/\" title=\"Webex Suite\uff1aWebex Meetings \u306b\u3088\u308a\u3001\u30cf\u30fc\u30c9\u3067\u306f\u306a\u304f\u30b9\u30de\u30fc\u30c8\u306a\u50cd\u304d\u65b9\u3092\u5b9f\u73fe\">Webex Suite\uff1aWebex Meetings \u306b\u3088\u308a\u3001\u30cf\u30fc\u30c9\u3067\u306f\u306a\u304f\u30b9\u30de\u30fc\u30c8\u306a\u50cd\u304d\u65b9\u3092\u5b9f\u73fe<\/a><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>\u30ea\u30a2\u30eb\u30bf\u30a4\u30e0\u4f1a\u8b70\u306b\u95a2\u3059\u308b\u3053\u3061\u3089\u306e\u6700\u65b0\u306e\u30d6\u30ed\u30b0\u3067\u306f\u3001\u30d3\u30c7\u30aa\u306b\u95a2\u3059\u308b\u30a4\u30f3\u30b5\u30a4\u30c8\u3092\u3054\u7d39\u4ecb\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n","protected":false},"author":5662,"featured_media":420906,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"footnotes":""},"categories":[1531],"tags":[15250],"class_list":["post-424088","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-engineering","tag-15250"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.1.1 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>\u30ea\u30a2\u30eb\u30bf\u30a4\u30e0\u30e1\u30c7\u30a3\u30a2 | \u30d3\u30c7\u30aa\u5165\u9580 | Webex Blog<\/title>\n<meta name=\"description\" content=\"\u30ea\u30a2\u30eb\u30bf\u30a4\u30e0\u4f1a\u8b70\u306b\u95a2\u3059\u308b\u3053\u3061\u3089\u306e\u6700\u65b0\u306e\u30d6\u30ed\u30b0\u3067\u306f\u3001\u30d3\u30c7\u30aa\u306b\u95a2\u3059\u308b\u30a4\u30f3\u30b5\u30a4\u30c8\u3092\u3054\u7d39\u4ecb\u3057\u3066\u3044\u304d\u307e\u3059\u3002\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/blog.webex.com\/ja\/engineering\/real-time-media-a-primer-on-video\/\" \/>\n<meta property=\"og:locale\" content=\"ja_JP\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u30ea\u30a2\u30eb\u30bf\u30a4\u30e0\u30e1\u30c7\u30a3\u30a2 | \u30d3\u30c7\u30aa\u5165\u9580 | Webex Blog\" 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