[Vorbis] smallest page of encoded data

[Carsten Haese]

On Sun, Mar 15, 2009 at 9:43 PM, Adam Langley <alangley at winscribe.com>wrote:

> Thanks for the insight Carsten.
> Basically, we're building a dictation system, with SPEEX at its core.
> Currently we have this working but the problem is, the SPEEX encoding
> process takes approximately 1 minute per MB of PCM audio, resulting in
> lengthy 'encode' jobs after a user has finished their dictation.
> I am attempting to find a way around this, and my hope was that I could
> perform some type of incremental encode during the record process, yet still
> enable the user to trim/rearrange their dictation without requiring a
> complete re-encode.
> And most users do edit the file to some degree...
>

At least you've picked the right tool for the job. That's good. You might
want to ask for advice on the mailing list that's dedicated to Speex. Speech
coding is an entirely different animal than general-purpose audio encoding,
and you have a better chance of reaching Speex experts, including Jean-Marc
himself, on the Speex list.

A Speex expert will be much better qualified to gauge the feasibility of
your approach, and might be able to provide insights for how to avoid or
reduce the artifacts you might get from naive frame-splicing. Then again,
you could just try the naive frame-splicing to hear what artifacts you'll
get. Maybe it won't be too bad.

-Carsten
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