I deeply apologize for the inconvenience that my cross posting has caused. I am sorry. I have read about the fmtp attribute in the sdp rfc. About the usage of fmtp for bitrate, I read it in some rfc on g.722 codec. I think it was rfc 3047. Forgive me, if the no. is wrong. ------------- Original Message -------------- Shan Lu <[EMAIL PROTECTED]> wrote: To:"[EMAIL PROTECTED]" <[EMAIL PROTECTED]> From:Shan Lu <[EMAIL PROTECTED]> Date:Mon, 23 Apr 2001 11:19:13 -0400 CC:"[EMAIL PROTECTED]" <[EMAIL PROTECTED]> Subject:[Sip] Re: [Sip-implementors] doubt on using sdp I believe cross posting to SIP and SIP-Implementors lists is STRONGLY discouraged. Now my 2 cents: I don't think you need to list 5.3 and 6.3 kbps separately if you can support both. ITU-T Recommendation G.723.1 specifies both bit rates for G.723.1 codec. So if you list support for G.723.1, it should imply that you support both rates. As for the actual bit rate used, one may find out by inspecting the RTP payload. BTW, where is "a=fmtp bitrate" defined? Regards, Shan Lu Manish S. Jalan wrote: > Hello everyone, > > I have a query on using sdp while establishing a session using sip. > > I want to use G.723 encoding for the rtp. > Hence in the media description, I'll give > > m=audio 12345 RTP/AVP 4 > a=rtpmap:4 G723/8000 > a=fmtp bitrate=6300 > > My query is: > G.723 is a dual rate encoding scheme. One at 5.3Kbps and another at 6.3 Kbps. > In the sdp definition above, I have specified, my capability for the 6.3 Kbps G.723 >encoding. > Say, if I have the capability of supporting 5.3 Kbps also. > Then, how do i indicate that, i support both. > Simply by an additional fmtp line, or some other mechanism. > > Eagerly waiting for your help. Thanks in advance. > > Regards, > -Manish S. Jalan > > > _____________________________________________________ > Chat with your friends as soon as they come online. Get Rediff Bol at > http://bol.rediff.com > > > > > _______________________________________________ > Sip-implementors mailing list > [EMAIL PROTECTED] > http://lists.cs.columbia.edu/mailman/listinfo/sip-implementors > > > _______________________________________________ SIP mailing list [EMAIL PROTECTED] http://www.vovida.org/mailman/listinfo/sip _____________________________________________________ Chat with your friends as soon as they come online. Get Rediff Bol at http://bol.rediff.com _______________________________________________ Sip-implementors mailing list [EMAIL PROTECTED] http://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
