[vorbis] bitrate peeling question

Monty xiphmont at xiph.org
Tue Aug 28 23:07:23 PDT 2001



On Tue, Aug 28, 2001 at 06:29:09PM -0700, Henry Rearden wrote:
> hi all,
> 
> i have two questions about bitrate peeling that i hope someone
> on this list can answer:
> 
> 1) my understanding is that BP allows you to derive a lower-
> bitrate version of an encoded file (say 128kbps) directly from
> a higher-bitrate version (say 192kbps), without having to re-rip
> from a CD or generate an intermediate WAV file.

Yes.  

> this is potentially a huge win for those who want to archive all
> their CDs into high-quality Oggs, and to then use files from that
> same archive on their Ogg-capable portable players (don't i wish)
> when going to exercise, etc. is my understanding of how BP is
> supposed to work correct, or am i missing something?
> 
> 2) is BP currently implemented? if so, how do i use it? if not,
> any idea as to when it will be working?

Implemented: no, not really.  We're getting to it.  It doesn;t require
extensive encoder smarts, but rc2 is still not really helping things
out any :-)

Monty

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