Internet Speech Audio Codec

internet Speech Audio Codec
Internet media type
audio/isac[1]
Developed byGlobal IP Solutions, now Google Inc
Type of formatAudio compression format
Codec
Developer(s)Global IP Solutions, now Google Inc
Written inC
Operating systemCross-platform
TypeAudio codec, reference implementation
Licenseformerly proprietary, now 3-clause BSD
Websitewebrtc.org

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, e.g. 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]

  1. ^ Grand, Tina le; Jones, Paul; Huart, Pascal; Shabestary, Turaj Zakizadeh; Alvestrand, Harald T. (2013). "RTP Payload Format for the iSAC Codec". Retrieved 2016-04-30.
  2. ^ Dana Blankenhorn (2010-05-18). "Why Google bought Global IP Solutions". ZDNet. Archived from the original on May 21, 2010. Retrieved 2011-06-23.
  3. ^ "iLBC Freeware". Archived from the original on 2011-07-05. Retrieved 2011-06-23.
  4. ^ webrtc.org/faq/#what-is-the-isac-audio-codec Archived 2011-06-07 at the Wayback Machine.
  5. ^ webrtc.org/license/additional-ip-grant/ Archived 2017-11-13 at the Wayback Machine.