AW: [vorbis-dev] PlusV algorithm -> CBR

Michael Smith msmith at xiph.org
Sat Feb 1 21:55:32 PST 2003



On Thursday 30 January 2003 03:16, Dan Miller wrote:
> fwiw, there are definitely applications that would use Vorbis but can't
> until there is a _strict_ CBR mode.  Meaning, architecturally the datarate
> simply cannot exceed X no matter what happens to the quality.  Send silence
> if you have to, but limit the datarate.

Dan,

In situations like this, how is bitrate measured? When you say "cannot exceed 
X no matter what", what time-period is this over? Since vorbis is a 
block-based codec (as are many others, including mp3), it's essential to 
specify some time window - even if that's just a single block (but note that 
since there's more than one block size, even that can be problematic).

Nobody seems to want to say what they actually MEAN by "CBR".

Mike

--- >8 ----
List archives:  http://www.xiph.org/archives/
Ogg project homepage: http://www.xiph.org/ogg/
To unsubscribe from this list, send a message to 'vorbis-dev-request at xiph.org'
containing only the word 'unsubscribe' in the body.  No subject is needed.
Unsubscribe messages sent to the list will be ignored/filtered.



More information about the Vorbis-dev mailing list