Hi, On 2/27/08, actech <actech@jp.sony.com> wrote:
Hi Mark,
We think it is very useful that the all of decoding parameters are available before decoding, without any parsing of payload data. For example, if the receiver has only 48000Hz D/A clock, the receiver can activate sampling rate converter before 44100Hz decoding, or send back decoder capability(refusal of 44100Hz streaming) to sender side in SDP offer-answer exchange.
In addition, we made a discuss with AVT chair that also ATRAC3 media type registration should have a bit-rate parameter even if it can be only 44100, considering the consistency that ATRAC-X and ATRAC Advanced Lossless media type have bit-rate parameter.
Ok, so there seems to be some kind of generic processing model here. Can you describe how that works? I ask because I'm trying to figure out a) how a recipient should interpret the content when either a required parameter is missing or ATRAC3 content is transferred with an ATRAC media type, and b) if the generic processing model is of a variety that might benefit from a "+atrac" extension on media type names similar to "+xml" for XML content. Keep in mind I know nothing about audio formats. Thanks. Mark. -- Mark Baker. Ottawa, Ontario, CANADA. http://www.markbaker.ca Coactus; Web-inspired integration strategies http://www.coactus.com