Re: [linux-audio-dev] Olypus voice recorder - codec?

From: Erik de Castro Lopo <mle+la@email-addr-hidden-nerd.com>
Date: Tue Jan 03 2006 - 08:50:43 EET

David Santinoli wrote:

> AFAICT the encoding should be (Adaptive Differential Pulse Code
> Modulation). Don't know about the file container though...

There are at least 50 different, mutually incompatible types
of ADPCM. For instance, libsndfile supports:

        SF_FORMAT_IMA_ADPCM /* IMA ADPCM. */
        SF_FORMAT_MS_ADPCM /* Microsoft ADPCM. */
        SF_FORMAT_VOX_ADPCM /* OKI / Dialogix ADPCM */
        SF_FORMAT_G721_32 /* 32kbs G721 ADPCM encoding. */
        SF_FORMAT_G723_24 /* 24kbs G723 ADPCM encoding. */
        SF_FORMAT_G723_40 /* 40kbs G723 ADPCM encoding. */

which is a mere drop in the bucket.

Erik 

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  Erik de Castro Lopo
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Received on Tue Jan 3 12:15:05 2006

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