SDPng structure

Uses XML syntax - example adapted from Appendix C in [Kutscher 2005]:

<!--?xml version="1.0" encoding="UTF-8"?-->
  <sdpng xmlns="http://www.iana.org/sdpng"
         xmlns:audio="http://www.iana.org/sdpng/audio"
         xmlns:video="http://www.iana.org/sdpng/video"3
         xmlns:rtp="http://www.iana.org/sdpng/rtp"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://www.iana.org/sdpn  sdpng-base.xsd
                             http://www.iana.org/sdpng/audio sdpng-audio-pkg.xsd
                             http://www.iana.org/sdpng/video sdpng-video-pkg.xsd
                             http://www.iana.org/sdpng/rtp   sdpng-rtp-pkg.xsd"  >
  <cap><audio:codec name="avp:dvi4">
              <audio:encoding>DVI4</audio:encoding>
              <audio:channels>1</audio:channels>
        <audio:codec name="avp:l16">
              <audio:encoding>L16</audio:encoding>
              <audio:channels>1 2</audio:channels>
              <audio:sampling>44100</audio:sampling></audio:codec>
        <video:codec name="avp:celb">
               <video:encoding>CelB</video:encoding>
               <video:framerate>4 6 8 12 16 20 24 30</video:framerate></video:codec>
        <rtp:udp name="rtpudpip6">
               <rtp:network>IP6</rtp:network></rtp:udp></cap>
   <def><rtp:udp name="rtp-cfg1" ref="rtpudpip6">
           <rtp:ip-addr>::1</rtp:ip-addr>
             <rtp:rtp-port>9546</rtp:rtp-port></rtp:udp></def>
   <cfg><component>
           <alt>
                <audio:codec ref="avp:l16"/>
                <rtp:udp ref="rtp-cfg1"><rtp:pt>0</rtp:pt></rtp:udp></alt></component></cfg></sdpng>

For details see appendices A.1 “SDPng Base DTD” and A.2 “SDPng XML-Schema Specification” in [Kutscher 2005].

Slide Notes

Dirk Kutscher, Jörg Ott, and Carsten Bormann, “Session Description and Capability Negotiation”, IETF Internet-Draft, February 20, 2005, Expired: August 21, 2005, http://tools.ietf.org/html/draft-ietf-mmusic-sdpng-08 Links to an external site.

Transcript

[slide203] So here's what SDP next generation was proposed to be. It should be in XML, it's much more readable, we have more readable names, etc.