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Discussion Groups | Speech Coding | G729 quantization of the gains
Technical discussions related to Speech Coding (all itu and other vocoders, ACELP, CELP, AMR, etc)
G729 quantization of the gains - shabnamso - Dec 9 14:29:00 2003
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Hello I would be thankful if anybody who has tested the G729A source code by ITU can tell me if the QUA_GAIN function has been implemented exactly as the algorithm. I try to run it on Code Composer Studio C6000 simulator with various ITU test vectors and everytime I get the error of division by a negative number:'denom' I appreciate your suggestions in this regard. Shabnam |
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Re: G729 quantization of the gains - chetan k - Dec 11 14:19:00 2003
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Hi, The code is Implemented in the same way as the Spec, But the problem is with the saturation. Don't remove saturation for L_add, ie don't replace L_add(a, b) with a+b. In C6000 you have sadd which does saturation on addtion. This is the problem which I think and not with the Spec to code mapping. --- shabnamso <> wrote: > Hello > I would be thankful if anybody who has tested the > G729A source code > by ITU can tell me if the QUA_GAIN function has been > implemented > exactly as the > algorithm. > I try to run it on Code Composer Studio C6000 > simulator with various > ITU test > vectors and everytime I get the error of division > by a negative > number:'denom' > I appreciate your suggestions in this regard. > Shabnam ===== With Rgds Chetan k. __________________________________ |
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