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Discussion Groups | Speech Coding | ADPCM encoder/decoder

Technical discussions related to Speech Coding (all itu and other vocoders, ACELP, CELP, AMR, etc)

  

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ADPCM encoder/decoder - vipul paladiya - Nov 1 9:30:00 2001




Hi champs,
I am working on ADPCM encoder and decoder. I have got the C code of G.726 from
the net. This is for all the 16,24,32,40 kbps. I have purchased the standard
document and testvectors from the ITU site.
Now, I have the C code of encoder/decoder working on PC. I have tested with few
speech files. I am facing problem in testing the code using
testvectors(standard). In the testvectors they have given homing file, reset
files..and many more things. I have gone thru the document given with it, but
couldn't quite figure out How to test the code properly.

Can anybody suggest some method to use the testvectors?
Flow like,
inputfiles, outputfiles etc will be useful.

Regards,
-Vipul paladiya
BITS, pilani





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Re: ADPCM encoder/decoder - Author Unknown - Nov 9 11:52:00 2001

There is G.726 Appendix II. In this spec You can find out everything about
testin G.726. If You want I can send You this spec.

I have big problem with my implementation of G726. It false on homing.




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