[MMUSIC] Question about draft-ietf-mmusic-sdp-media-capabilities-03.txt

["Guangwu.He" <heguangwu at huawei.com>]

Hi,all

 

I have a question:

 

SDPCapNeg define a=acap:

A new attribute ("a=acap") that defines how to list an attribute name and its associated value (if any) as a capability.

e.g. a=acap:1 rtcp-fb:0 nack

 

and SDPMedCap define a=mscap:

Media-specific attributes, beyond the rtpmap and fmtp attributes.

e.g. a=mscap:1 rtcp-fb ccm tstr

 

above of examples can find in two drafts.

 

I can’t understand the difference between the two attributes, or they are repeating defined?

Thanks & Regards,

Guangwu.He

 

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