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0.6

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stpeter 2011-06-27 15:22:41 -06:00
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xep-0266.xml
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@ -24,6 +24,12 @@
<shortname>N/A</shortname>
<discuss>jingle</discuss>
&stpeter;
<revision>
<version>0.6</version>
<date>2011-06-27</date>
<initials>psa</initials>
<remark><p>Clarified that the codec descriptions are non-normative.</p></remark>
</revision>
<revision>
<version>0.5</version>
<date>2011-06-12</date>
@ -97,6 +103,7 @@
</section1>
<section1 topic='Codecs' anchor='codecs'>
<p>This section is non-normative. Future versions of this specification might provide information about additional codecs not listed here.</p>
<section2 topic='G.711' anchor='codecs-g711'>
<p>G.711 refers to the Pulse Code Modulation (PCM) codec defined in &ITU; recommendation G.711, which is widely used on the public switched telephone network (PSTN) and by many voice over Internet Protocol (VoIP) providers. There are two versions: the &#956;-law ("U-law") version is widely deployed in North America and in Japan, whereas the A-law version is widely deployed in the rest of the world. The following table summarizes the available information about G.711.</p>
<table caption='Codec Considerations for G.711'>
@ -151,6 +158,7 @@
</section1>
<section1 topic='Guidance for Implementers' anchor='impl'>
<p>This section is non-normative.</p>
<p>Given that both Speex and G.711 are patent-clear, freely implementable, and commonly deployed, implementers are encouraged to consider including support for both codecs in audio applications of Jingle RTP sessions. Discussion on the jingle@xmpp.org mailing list indicates a slight preference for G.711 because it is easily available and so widely deployed (e.g., in SIP networks and the PSTN). The Opus codec is not yet widely deployed (or even fully developed), but it might become the "codec of the future" for audio applications over the Internet.</p>
</section1>