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Help please from all you experts - obscure codec needed
funkyronster
post Dec 7 2006, 20:23
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I have been asked to convert a wav file in an obscure format to something more friendly - like an audio file that can be played in most standard players under XP.

I have used Gspot to try and identify the files and it reports that the codec is 0x0120 (PHILIPS CELP), 8000Hz 19 kb/s (1 chnl)

I have looked everywhere for a codec, and failed. I have downloaded many utilities and converters - none will work.

The files were made on some dictation system - Philips I think.

I know I am probably dealing with proprietary architechture here - and Philips only want their files to work with their kit.....

Any ideas?

Many thanks
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chelgrian
post Dec 7 2006, 22:47
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QUOTE (funkyronster @ Dec 7 2006, 20:23) *
The files were made on some dictation system - Philips I think.


Actually CELP is a variety of MPEG4 audio. The Philips MPEG 4 player available halfway down

http://rarewares.org/mp4.html

might play them. Some other MPEG4 capable players might also play them.

The problem is going to be if the files are in some non-standard or proprietary container format instead of the MPEG standard one.
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funkyronster
post Dec 8 2006, 13:54
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Thanks - I've aready tried that player - no joy.

I think you might be right about the container.
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kjoonlee
post Dec 8 2006, 15:34
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Uhm.. CELP isn't tied to MPEG-4. Speex uses it too.

Code Excited Linear Prediction at Wikipedia


--------------------
http://blacksun.ivyro.net/vorbis/vorbisfaq.htm
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jido
post Dec 10 2006, 12:32
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If you find a way to re-package it to MPEG-4 you may have a chance with MPEG-4 enabled players like QuickTime.
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AlanLloyd
post Oct 23 2009, 21:22
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QUOTE (funkyronster @ Dec 7 2006, 20:23) *
I have been asked to convert a wav file in an obscure format to something more friendly - like an audio file that can be played in most standard players under XP.

I have used Gspot to try and identify the files and it reports that the codec is 0x0120 (PHILIPS CELP), 8000Hz 19 kb/s (1 chnl)

I have looked everywhere for a codec, and failed. I have downloaded many utilities and converters - none will work.

The files were made on some dictation system - Philips I think.

I know I am probably dealing with proprietary architechture here - and Philips only want their files to work with their kit.....


I have converted Phiips dictations to PCM & then to GSM. I used a Philips SDK for decoding. I note that I have a codec named smcelp.acm.

The Philips SDK wrapped calls to the codec in some simpler calls to one of their DLLs.

Alan Lloyd
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Nick.C
post Oct 23 2009, 21:36
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He'll either have given up or sorted the problem in the last 34 months....


--------------------
lossyWAV -q X -a 4 --feedback 4| FLAC -8 ~= 320kbps
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