- From: Thomas Davies <Thomas.Davies@bbc.co.uk>
- Date: Wed, 11 Apr 2007 08:33:52 +0100
>> >>For the case of a bitstream format change, there is version >information >>in the header of a theora bitstream. Major and minor version numbers >>are being used similarly to the way that *nix library version numbers >>work - anything with a minor change is backwards compatible, but a >>major change may not be. So, if a major version number change was to >>occur with theora, a new MIME type would probably be required, e.g. >>video/x-theora2. >> >>I hope this answers the question? > Likewise for Dirac, there are version numbers to cope with bitstream evolution/bug-fixes. We haven't finalised profiles and levels yet, but there will probably be two profiles, a Main profile covering everything, and a Professional profile covering a restricted set for professional applications, such as very low delay coding or intra-only coding. I can't see this profile being deployed over the internet - it will be for very high bit rate hardware apps, but if it was, a Main-capable decoder could decode it. Thomas http://www.bbc.co.uk/ This e-mail (and any attachments) is confidential and may contain personal views which are not the views of the BBC unless specifically stated. If you have received it in error, please delete it from your system. Do not use, copy or disclose the information in any way nor act in reliance on it and notify the sender immediately. Please note that the BBC monitors e-mails sent or received. Further communication will signify your consent to this.
Received on Wednesday, 11 April 2007 00:33:52 UTC