Re: [AVT] Offer/Answer section in draft-ietf-avt-rfc2429-bis-09.txt

[Magnus Westerlund <[e-mail]>]

Desineni, Harikishan skrev:
> It would be good to provide some examples along with these updates. 
> (I tried to come up with few examples listed at the end of this e-mail)
> 
> Profile and level are not included as parameters to H263-1998 MIME
> subtype. It looks like "profile=xx;level=yy" indication is applicable to
> H263-2000 MIME subtype only. If this is indeed the case, it would be
> better to clarify this as part of the upcoming update to the draft (in
> the offer/answer section).
> 
>>From Sec 8.1.2 on H263-2000 MIME subtype:
> "The optional parameters of the H263-1998 type MAY be used with this
> MIME subtype." 
> This is giving H263-2000, the freedom to use all optional parameters
> defined for H263-1998. Thus, it looks like just one MIME subtype
> (H263-2000) is necessary (May be I am terribly incorrect here!) in this
> draft. Can somebody enlighten me here on when am I mandated to use only
> h263-1998?

With system that only implements H263-1998. Please remember that this is 
an update of RFC 2429.

> 
> 
> Example 1:
> SDP offer with Profile 0, Level 10 and profile 1 and level 10
> 
> m=video 34560 RTP/AVP 96 97
> a=rtpmap:96 h263-2000/90000
> a=fmtp:96 profile=0;level=10;
> a=rtpmap:97 h263-2000/90000
> a=fmtp:97 profile=1;level=10;
> 
> SDP answer with profile 0, level 45 
> m=video 45678 RTP/AVP 96 
> a=rtpmap:96 h263-2000/90000
> a=fmtp:96 profile=0;level=45;
> 
> 
> Example 2:
> 
> SDP offer with Profile 0, Level 10 
> 
> m=video 34560 RTP/AVP 96 
> a=rtpmap:96 h263-2000/90000
> a=fmtp:96 profile=0;level=10;
> 
> 
> SDP answer with profile 0, level 45 and profile 1, level 10
> 
> m=video 45678 RTP/AVP 96 97

An bug on the above line   98

Cheers

Magnus Westerlund

Multimedia Technologies, Ericsson Research EAB/TVA/A
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