While trying to implement g.729 coder on some raw file the output it gives is basically a bitstream file I mean a binary file. The binary file...

While trying to implement g.729 coder on some raw file the output it gives is basically a bitstream file I mean a binary file. The binary file actually contains some binary data stream like "00101010110111100101011001". should I convert to the desired pattern for g.729 by taking the stream from left if I want to achieve the coded format? I am not very sure whether g.729 coded data in the bitstream...

Hi All I am not able to find GSM-FR speech codec ansi c code. If any body knows where can I get, please reply to me. I have already...

Hi All I am not able to find GSM-FR speech codec ansi c code. If any body knows where can I get, please reply to me. I have already searched in 3gpp standard search. But not able to find. Thanks in Advance. Regards Sridhar Artham

All- Has anyone ever noticed the G726 ITU u-Law input test vector (a file called nrm.m on ITU pages) has what appears to be an inversion or...

All- Has anyone ever noticed the G726 ITU u-Law input test vector (a file called nrm.m on ITU pages) has what appears to be an inversion or wrap-around? Not saying this is a problem, bit-exact testing using the vector works Ok. But it looks odd, and the inversion doesn't occur around 128. Here is a pic that shows an example in the 504 Hz tone section of the test vector: http://www.s...

Dears : Hi Is there any body who can introduce me a simple and understandable document about speech coding ? kindest Regards Iman...

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: +98-0912-4701588 Nokia Siemens Networks

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...

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 from ITU and found them to be bit exact (sent in the 16-bit A-law/ Mu-law output from the cvt_h_b.c code). I have also modified the code to accept 16-bit linear PCM data and send out linear PCM data and tested with t...

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...

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 NRM.M and OVR.M hex files to binary files using the cvt_h_b.c (code from ITU site). My code takes in linear PCM and outputs linear PCM so I have converted the mu-law and a-law binary files into linear PCM files. I...

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...

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 the code, a 48-tap FIR filter (integrator) is used. The coefficients of this filter are already given in the code. Looking at the frequency response of the filter, it looks like a low pass filter with cut-off at appro...

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...

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.o22 outputs for 9_3.p22 and 5_8.p22 resp) are not passing. I would highly appreciate if anyone having information on these issues of this code could help me out. -- Thanks and Regards, G.L.Harika It is your a...

We have downloaded version 4.4 EVRC-B fixed point code from ftp://ftp.3gpp2.org/TSGC/Incoming/SWG11/evrc_rel-C_mps_software/ We find two...

We have downloaded version 4.4 EVRC-B fixed point code from ftp://ftp.3gpp2.org/TSGC/Incoming/SWG11/evrc_rel-C_mps_software/ We find two problems with this code. They are: 1. We find that the output of the encoder doesn?t match with the expected output for Operating point-2 and signal power 22 and 32 dB (i.e. we used the command line options -i src.s22 -o 4_8.p22 -X OP=2 ?e and -i src.

Hi, I am using the iLBC speech codec on Android. I have not changed the original code I obtained from the RFC. I have just written JNI bridges...

Hi, I am using the iLBC speech codec on Android. I have not changed the original code I obtained from the RFC. I have just written JNI bridges to access the C code. There are no exceptions during encoding and decoding. I am using 8KHz, 16bit, Mono. I am using the 30ms encoding option. Whenever I playback decoded audio, it plays faster than the original rate it was recorded at. I have checked th...