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codec corrections

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git-svn-id: file:///home/ksmith/gitmigration/svn/xmpp/trunk@147 4b5297f7-1745-476d-ba37-a9c6900126ab
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Peter Saint-Andre 2006-10-31 21:52:16 +00:00
parent 20781470dc
commit 0a71f4a6e1
1 changed files with 7 additions and 10 deletions
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17
xep-0167.xml
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@ -133,16 +133,13 @@
<p>The encodings SHOULD be provided in order of preference.</p>
<example caption="Audio Description Format"><![CDATA[
<description xmlns='http://jabber.org/protocol/jingle/description/audio'>
<payload-type id='96' name='SPEEX' clockrate='16000'/>
<payload-type id='97' name='SPEEX' clockrate='8000'/>
<payload-type id='96' name='speex' clockrate='16000'/>
<payload-type id='97' name='speex' clockrate='8000'/>
<payload-type id='18' name='G729'/>
<payload-type id='99' name='IPCMWB'/>
<payload-type id='103' name='L16' clockrate='16000' channels='2'/>
<payload-type id='98' name='ISAC' clockrate='8000'/>
<payload-type id='98' name='x-ISAC' clockrate='8000'/>
<payload-type id='102' name='iLBC'/>
<payload-type id='4' name='G723'/>
<payload-type id='100' name='EG711U'/>
<payload-type id='101' name='EG711A'/>
<payload-type id='0' name='PCMU' clockrate='16000'/>
<payload-type id='8' name='PCMA'/>
<payload-type id='13' name='CN'/>
@ -238,22 +235,22 @@ m=audio 9999 RTP/AVP 13
<p>If the payload type is dynamic (payload-type IDs 96 through 127 inclusive), it SHOULD be mapped to an SDP media field plus an SDP attribute field named "rtpmap".</p>
<p>For example, consider a payload of 16-bit linear-encoded stereo audio sampled at 16KHz associated with dynamic payload-type 98:</p>
<example caption="Jingle Format for Dynamic Payload-Type"><![CDATA[
<payload-type id='96' name='SPEEX' clockrate='16000'/>
<payload-type id='96' name='speex' clockrate='16000'/>
]]></example>
<example caption="SDP Mapping of Dynamic Payload-Type"><![CDATA[
m=audio 9999 RTP/AVP 96
a=rtpmap:96 SPEEX/16000
a=rtpmap:96 speex/16000
]]></example>
<p>As noted, if additional parameters are to be specified, they shall be represented as attributes of the &lt;payload-type/&gt; element or of the child &lt;parameter/&gt; element, as in the following example.</p>
<example caption="Jingle Format for Dynamic Payload-Type With Parameters"><![CDATA[
<payload-type id='96' name='SPEEX' clockrate='16000' ptime='40'>
<payload-type id='96' name='speex' clockrate='16000' ptime='40'>
<parameter name='vbr' value='on'/>
<parameter name='cng' value='on'/>
</payload-type>
]]></example>
<example caption="SDP Mapping of Dynamic Payload-Type With Parameters"><![CDATA[
m=audio 9999 RTP/AVP 96
a=rtpmap:96 SPEEX/16000
a=rtpmap:96 speex/16000
a=ptime:40
a=fmtp:96 vbr=on;cng=on
]]></example>