jean-marc,
i tried like you recommended to resample the 44100 hz speech file with
the ess sounds to 16000 hz before speexenc-ing it.
result was good actually, i was able to use quality 8 without any
signs of sound bleeping, and the file size was very small (7324 bytes
compared to 9319 bytes with windows media voice at full quality).
the downside to this is that high frequencies are lost, which i think
is what is causing the problem in the first place. the voice in the
sound clip is not very crisp anymore.
would it be possible for speex to recognize parts with ess sounds or
particulily [important] high frequencies and decode these at a high
bitrate, while keeping the rest [and most] of the stream in lower
quality? in other words, make the vbr code more observant?
olav
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