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Different Codec Technologies

Different Codec Technologies. 多媒體壓縮格式列表. ITU-T Codec 技術比較表. ITU-T Codec 技術探討. G.711 A-Law ：常用於歐洲國家 Mu-Law ：常用於北美及日本 G.723.1 被廣泛運用在電話閘道器上，為一種高品質高壓縮型的壓縮技術。 G.726 為 G.721 和 G.723 的合體，常用於 DECT 無線網路電話和 Canon 相機。

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Different Codec Technologies

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  1. Different Codec Technologies

  2. 多媒體壓縮格式列表

  3. ITU-T Codec技術比較表

  4. ITU-T Codec技術探討 • G.711 • A-Law：常用於歐洲國家 • Mu-Law：常用於北美及日本 • G.723.1被廣泛運用在電話閘道器上，為一種高品質高壓縮型的壓縮技術。 • G.726為G.721和G.723的合體，常用於DECT無線網路電話和Canon相機。 • G.729較常使用於VoIP，標準的bit rate是8Kbps ，但也支援6.4Kbps和11.8Kbps， G.729 annex B並包含有VAD的功能。

  5. G.729 • Annex A ( G.729.A ) • G.729 Complex Codec • Annex B ( G.729.B ) • VAD ( Voice Activity Detection ) • DTX ( Discontinuous Transmission ) • CNG ( Comfort Noise Generation ) • Annex D ( G.729.D ) • Bit Rate比G.729低，為64bits/frame，頻寬為6.4Kbps • Annex E ( G.729.E ) • Bit Rate比G.729更高，為118bits/frame，頻寬為11.8Kbps

  6. iLBC

  7. 參考資料 • List of codecs： http://en.wikipedia.org/wiki/List_of_codecs

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