On 27 Feb 2008, at 04:43, Mark Baker wrote:
On 2/26/08, actech <actech@jp.sony.com> wrote:
In ATRAC receiver side, it is required to know sampling frequency, bit-rate and channel configuration in order to switch and initialize the decoder and associated hardware for immediate starting of ATRAC3, ATRAC-X or ATRAC Advanced Lossless decoding.
We think it is the best way to signal above parameters in SDP session with media type registarion procedure.
Hi Jun. I suppose that answers my question about a recipient being able to determine those parameters from the data itself, but I'm still not clear why a parameter is marked as required when it can only have a single value. Is it perhaps because other values may be supported in the future? Some other reason?
It's required by SDP signalling, which is the main place this media type will be used, since many other media types support variable rates. -- Colin Perkins http://csperkins.org/