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internet Speech Audio Codec
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<h2 id="parameters-and-features">Parameters and features</h2> <ul><li><a href="/facts/Sampling_frequency/xxck7aLN">Sampling frequency</a> of 16 kHz (wideband) or 32 kHz (superwideband)<a class="footnote-ref" id="fnref:5" href="#fn:5"><sup>5</sup></a><a class="footnote-ref" id="fnref:6" href="#fn:6"><sup>6</sup></a><a class="footnote-ref" id="fnref:7" href="#fn:7"><sup>7</sup></a></li> <li>Adaptive and variable <a href="/facts/Bit_rate/ppUNMmVd">bit rate</a> of 10 kbit/s to 32 kbit/s (wideband) or 10 kbit/s to 52 kbit/s (superwideband)<a class="footnote-ref" id="fnref:8" href="#fn:8"><sup>8</sup></a><a class="footnote-ref" id="fnref:9" href="#fn:9"><sup>9</sup></a><a class="footnote-ref" id="fnref:10" href="#fn:10"><sup>10</sup></a></li> <li>Adaptive packet size 30 to 60 ms</li> <li>Complexity comparable to <a href="/facts/G.722.2/J70f7LGx">G.722.2</a> at comparable bit-rates</li> <li>Algorithmic delay of frame size plus 3 ms</li></ul> <h2 id="see-also">See also</h2> <ul><li><a href="/facts/ILBC/rPQsKfjo">iLBC</a></li> <li><a href="/facts/Opus_(audio_codec)/VP4KuGre">Opus (audio codec)</a></li> <li><a href="/facts/SILK/D3LIM71t">SILK</a></li> <li><a href="/facts/G.722/z6J1sSuU">G.722</a></li> <li><a href="/facts/Speex/M7xqnPxN">Speex</a></li> <li><a href="/facts/List_of_codecs/e5nTCc5X">List of codecs</a></li></ul> <h2 id="external-links">External links</h2> <ul><li><a href="https://webrtc.googlesource.com/src/+/master/modules/audio_coding/codecs/isac/">WebRTC codecs - GIT- source code for iSAC and other codecs</a></li></ul> <h2 id="references">References</h2> <ol> <li id="fn:1"><p>Dana Blankenhorn (2010-05-18). "Why Google bought Global IP Solutions". ZDNet. Archived from the original on May 21, 2010. Retrieved 2011-06-23. <a href="https://web.archive.org/web/20100521163742/http://www.zdnet.com/blog/open-source/why-google-bought-global-ip-solutions/6501" target="_blank">https://web.archive.org/web/20100521163742/http://www.zdnet.com/blog/open-source/why-google-bought-global-ip-solutions/6501</a> <a href="#fnref:1" class="footnote-back-ref">↩</a></p></li> <li id="fn:2"><p>"iLBC Freeware". Archived from the original on 2011-07-05. Retrieved 2011-06-23. <a href="https://web.archive.org/web/20110705082246/http://www.webrtc.org/ilbc-freeware" target="_blank">https://web.archive.org/web/20110705082246/http://www.webrtc.org/ilbc-freeware</a> <a href="#fnref:2" class="footnote-back-ref">↩</a></p></li> <li id="fn:3"><p>webrtc.org/faq/#what-is-the-isac-audio-codec Archived 2011-06-07 at the Wayback Machine. <a href="https://webrtc.org/faq/#what-is-the-isac-audio-codec" target="_blank">https://webrtc.org/faq/#what-is-the-isac-audio-codec</a> <a href="#fnref:3" class="footnote-back-ref">↩</a></p></li> <li id="fn:4"><p>webrtc.org/license/additional-ip-grant/ Archived 2017-11-13 at the Wayback Machine. <a href="https://webrtc.org/license/additional-ip-grant/" target="_blank">https://webrtc.org/license/additional-ip-grant/</a> <a href="#fnref:4" class="footnote-back-ref">↩</a></p></li> <li id="fn:5"><p>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. <a href="https://tools.ietf.org/html/draft-ietf-avt-rtp-isac-04" target="_blank">https://tools.ietf.org/html/draft-ietf-avt-rtp-isac-04</a> <a href="#fnref:5" class="footnote-back-ref">↩</a></p></li> <li id="fn:6"><p>"WebRTC FAQ - What are the parameters of iSAC?". Archived from the original on 2016-11-17. Retrieved 2011-06-23. <a href="https://web.archive.org/web/20161117080721/http://sites.google.com/site/webrtc/faq#TOC-What-are-the-parameters-of-iSAC-" target="_blank">https://web.archive.org/web/20161117080721/http://sites.google.com/site/webrtc/faq#TOC-What-are-the-parameters-of-iSAC-</a> <a href="#fnref:6" class="footnote-back-ref">↩</a></p></li> <li id="fn:7"><p>"WebRTC components". Archived from the original on 2011-06-28. Retrieved 2011-06-23. <a href="https://web.archive.org/web/20110628000815/http://www.webrtc.org/reference/webrtc-components#TOC-iSAC" target="_blank">https://web.archive.org/web/20110628000815/http://www.webrtc.org/reference/webrtc-components#TOC-iSAC</a> <a href="#fnref:7" class="footnote-back-ref">↩</a></p></li> <li id="fn:8"><p>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. <a href="https://tools.ietf.org/html/draft-ietf-avt-rtp-isac-04" target="_blank">https://tools.ietf.org/html/draft-ietf-avt-rtp-isac-04</a> <a href="#fnref:8" class="footnote-back-ref">↩</a></p></li> <li id="fn:9"><p>"WebRTC FAQ - What are the parameters of iSAC?". Archived from the original on 2016-11-17. Retrieved 2011-06-23. <a href="https://web.archive.org/web/20161117080721/http://sites.google.com/site/webrtc/faq#TOC-What-are-the-parameters-of-iSAC-" target="_blank">https://web.archive.org/web/20161117080721/http://sites.google.com/site/webrtc/faq#TOC-What-are-the-parameters-of-iSAC-</a> <a href="#fnref:9" class="footnote-back-ref">↩</a></p></li> <li id="fn:10"><p>"WebRTC components". Archived from the original on 2011-06-28. Retrieved 2011-06-23. <a href="https://web.archive.org/web/20110628000815/http://www.webrtc.org/reference/webrtc-components#TOC-iSAC" target="_blank">https://web.archive.org/web/20110628000815/http://www.webrtc.org/reference/webrtc-components#TOC-iSAC</a> <a href="#fnref:10" class="footnote-back-ref">↩</a></p></li> </ol>