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Discussion Groups | Speech Coding

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

  

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LPC method   [2 Articles]
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Iman Rasti - Apr 5 2010
Dears : Hi Is there any body who can introduce me a simple and understandable document about speech coding ? kindest Regards Iman Rasti Email:i...@gmai.com Tel: ... LPC method

G726 codec support with .wav files
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Aditi Akula - Feb 3 2010
Hi All, I want to play G726 (16 kbps) encoded data with Windows Media Player (WMP). I have modified the normal wave header to allow for the G726 code (0x0045). But it does not... G726 codec support with .wav files

bandwidth expansion
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sati...@gmail.com - Jan 10 2010
hi every one, can any one explain how bandwidh expands if poles moves towards origin. regards, skcdsp ... bandwidth expansion

G726 bit-exact bug SOLVED, question about 14-bit range
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Aditi Akula - Dec 21 2009
Hi everyone, I have solved the bit -exact bug in my codeby adding this small piece of code. I have avoided inverting negative numbers which is a part of G726_compress before... G726 bit-exact bug SOLVED, question about 14-bit range

G726 bit-exact bug SOLVED, question about 14-bit range
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Aditi Akula - Dec 18 2009
Hi everyone, I have solved the bit -exact bug in my code. But now I have another problem with the input range to the encoder. My encoder can take values only between 0 & 8191 ... G726 bit-exact bug SOLVED, question about 14-bit range

ITU G726 code not working for speech files   [4 Articles]
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Aditi Akula - Dec 15 2009
Hi Everyone, I am using the G726 code from ITU (g726.c, g726.h, cvt_h_b.c, etc) for 16 kbps an using it as a Visual C++ project. I have tested the code using the test vectors ... ITU G726 code not working for speech files

Reg G726 test vector verification
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Aditi Akula - Dec 9 2009
Hi everyone, I am working on G726. I have the source code in C (from Sun Microsystems). I am trying to test the algorithm using the ITU test vectors. I have converted the NR... Reg G726 test vector verification

CVSD Decoder filter   [3 Articles]
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Aditi Akula - Nov 24 2009
Hi, I am working on a CVSD code that I found online on Koders.com. I have a few questions. The CVSD code that I am working on is a 16kbps code. 1) In the decoder side of th... CVSD Decoder filter

Retrive frame energy from encoded G.729
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nir....@gmail.com - Nov 23 2009
Hi, I saw that the G.729 has 3+3+4+4 bit to 4 type of gains (Codebook gains) does these bit can serve as an indication to frame energy? thanks, ... Retrive frame energy from encoded G.729

problem with EVRC-B fixed code   [6 Articles]
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"G. Lakshmi Harika" - Sep 13 2009
We have downloaded version 4.4 EVRC-B fixed point code from ftp://ftp.3gpp2.org/TSGC/Incoming/SWG11/evrc_rel-C_mps_software/ While running the decoder in DTX (9_3.o22 and 5_8.... problem with EVRC-B fixed code
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