Update to address Magnus concern, Colin suggestion used

[platform/upstream/libvorbis.git] / doc / draft-ietf-avt-rtp-vorbis-09.xml

diff --git a/doc/draft-ietf-avt-rtp-vorbis-09.xml b/doc/draft-ietf-avt-rtp-vorbis-09.xml
index 619138f..fa476d5 100644 (file)
--- a/doc/draft-ietf-avt-rtp-vorbis-09.xml
+++ b/doc/draft-ietf-avt-rtp-vorbis-09.xml
@@ -395,7 +395,10 @@ stream may change certain configuration data mid-session, there are
 different methods for delivering this configuration data to a 
 client, both in-band and out-of-band which is detailed below.
 In order to set up an initial state for the client application the
-configuration MUST be inlined in the session setup informations.
+configuration MUST be conveyed via the signalling channel used to setup
+the session. One example of such signalling is
+<xref target="rfc4566">SDP</xref> with the
+<xref target="rfc3264">Offer/Answer Model</xref>.
 Changes to the configuration MAY be communicated via a re-invite,
 conveying new SDP, or sent in-band in the RTP channel.
 Implementations MUST support in-band delivery of updated codebooks,
@@ -1051,12 +1054,13 @@ using the configuration attribute.
 
 <t>
 The port value is specified by the server application bound to the address
-specified in the c= line. The sample rate and channel count value specified
-in the rtpmap attribute SHOULD match the current Vorbis stream or considered
-the maximum number of channels to be expected and the least common multiple
-sample rate for the session. The Configuration payload delivers the exact
-information, thus the SDP information SHOULD be considered as a hint.
-An example is found below.
+specified in the c= line. The channel count value specified in the rtpmap
+attribute SHOULD match the current Vorbis stream or considered the maximum
+number of channels to be expected. The timestamp clock rate MUST be a multiple
+of the sample rate, different payload number MUST be used if the clock rate
+changes. The Configuration payload delivers the exact information, thus the
+SDP information SHOULD be considered as a hint.
+An example is found below. 
 </t>
 
 <section anchor="SDP Example" title="SDP Example">