On Wed, Sep 19, 2007 at 17:31:57 -0300, ツ Leandro Sales wrote: > it RFC 4342, section 5.3 (Packet Sizes), it says that CCID-3 is not > appropriate for applications that require a fixed interval of time > between packets and vary their packet size instead of their packet > rate in response to congestion. The question is: in this case it is > not recommended to use VBR codecs such as SPEEX on the application > layer? Is this same issue occurs in the CCID-4? I interpret RFC 4342 exactly the way you do. CCID 3 is suitable for applications such as online gaming, but not for variable bitrate codecs. CCID 4 draft (draft-floyd-dccp-ccid4-01.txt), section 3: "CCID 4 is designed to be used either by applications that use a small fixed segment size, or by applications that change their sending rate by varying the segment size. If CCID 4 is used by an application that varies its segment size in response to changes in the allowed sending rate in bps, we note that CCID 4 doesn't dictate the segment size to be used by the application; this is done by the application itself." The way I understand this, CCID 4 is The Choice(tm) for VBR codecs such as Speex, which is also one of the main reasons I'm interested in CCID 4. - To unsubscribe from this list: send the line "unsubscribe dccp" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
