internet Speech Audio Codec(iSAC)

iSAC(Internet Speech Audio Codec)是一种宽带语音编解码器,由Global IP Solutions开发并被Google收购。它适用于VoIP应用和流媒体音频,在10到32 kbit/s的可变比特率下工作,支持16 kHz的采样频率。iSAC已作为专有编解码器发布,并于2011年成为开源WebRTC项目的一部分。

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From Wikipedia, the free encyclopedia
 
 
internet Speech Audio Codec (iSAC)
Internet media typeaudio/isac[1]
Developed byGlobal IP Solutions, now Google Inc
Type of formatAudio compression format

 

iSAC Codec

Developer(s)Global IP Solutions, now Google Inc
Written inC
Operating systemCross-platform
TypeAudio codec, reference implementation
Licenseformerly proprietary, now 3-clause BSD
Website[1]

 

internet Speech Audio Codec (iSAC) is a wideband speech codec, developed by Global IP Solutions (GIPS) (acquired by Google Inc in 2011[2][3]). It is suitable for VoIP applications and streaming audio. The encoded blocks have to be encapsulated in a suitable protocol for transport, eg. RTP.

It is one of the codecs used by AIM Triton, the Gizmo5, QQ, and Google Talk. It was formerly a proprietary codec licensed by Global IP Solutions. As of June 2011, it is part of open source WebRTC project[4], which includes a royalty-free license for iSAC when using the WebRTC codebase[5].

 

Parameters and features

 

 

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