Estimating coefficients of digital filter

Started by skoa...@yahoo.com in Speech Coding12 years ago 1 reply

Hello all! I'm using the Autocorrelation method as the PDA in an assignment entitled: Synthesis By Analysis using LPC. I've read so many...

Hello all! I'm using the Autocorrelation method as the PDA in an assignment entitled: Synthesis By Analysis using LPC. I've read so many literature implying forming a matrix equation with p unknowns: How does one estimate the coefficients of the digital filter or model from a segment of speech. Thanks


standard speech coder

Started by mouloud Djamah in Speech Coding12 years ago 2 replies

Hi I am looking for source code (C/C++) standard speech coder (FS MELP, ACELP, AMR_NB,....) to download or to buy. Is there official web site...

Hi I am looking for source code (C/C++) standard speech coder (FS MELP, ACELP, AMR_NB,....) to download or to buy. Is there official web site where I download them (for free or to buy them) Thanks


File Size

Started by than...@askcalea.net in Speech Coding12 years ago 1 reply

I got the G 729 ITU-T C code compiled and running. I'm confused about two issues though. 1) Why is the file size of the encoder output the...

I got the G 729 ITU-T C code compiled and running. I'm confused about two issues though. 1) Why is the file size of the encoder output the same/or about same as the input. (I used a PCM 8000Mhz file for input) Shouldn't this file come out quite smaller, to the order of 1/8 th the size? 2) I have a sample encoded file from a vendor that does not decode even though I know it to be valid 729 A...


MOS algorithm

Started by nina...@yahoo.com in Speech Coding12 years ago 1 reply

hi to all!! i am working with GSM full rate speech Codec and i am implementing it on MATLAB. Now i want to check the Mean Openion Score of my...

hi to all!! i am working with GSM full rate speech Codec and i am implementing it on MATLAB. Now i want to check the Mean Openion Score of my decoded (.wav) file. can anybody help me out with some algorithms which can calculate MOS of my speech file? waiting for response.. Ninad S. Bhatt, DIC & Lecturer, Dept. Of E.C. C.K.Pithawalla College Of Engg. & Tech., Dumas Road, SUR...


AMR-WB+ decoder with AMR-WB files

Started by moha...@rediffmail.com in Speech Coding12 years ago 1 reply

Hi, I have cross compiled the AMR-WB+ C reference code distributed as part of the 3gpp spec and it is able to decode the AMR-WB+ test files....

Hi, I have cross compiled the AMR-WB+ C reference code distributed as part of the 3gpp spec and it is able to decode the AMR-WB+ test files. Now my question is, 1.Will this decoder decode AMR-WB files?(.awb files/.if2 or the .cod files that come with the test suite spec for AMR-WB). 2.What does it take to make this decoder decode those AMR-WB files(.awb etc)? Will just tampering the headers...


VAD/CNG module for GIPS ILBC

Started by navithak in Speech Coding12 years ago 1 reply

Hi, I have implemented Gips ILBC codec on adsp 2185..However I am unable to find any information on the vad/dtx module..Is that royalty...

Hi, I have implemented Gips ILBC codec on adsp 2185..However I am unable to find any information on the vad/dtx module..Is that royalty free as well?? Where can I obtain it?Any information will be greatly appreciated Another question..Does ilbc pass dtmf tone?? regards Navitha


voice _unvoice detector and remover

Started by blasottolo in Speech Coding12 years ago 1 reply

Hi, i am looking for some matlab sources about voice unvoice detection into wave file (with quite high noise). Also some routine to remove the...

Hi, i am looking for some matlab sources about voice unvoice detection into wave file (with quite high noise). Also some routine to remove the unvoice and noisy segments. Thanks a lot for your help!!! Blasottolo


How to plot LPC spectrum

Started by ee41gi in Speech Coding12 years ago 1 reply

Hi guys I have a 10th order LPC with...

Hi guys I have a 10th order LPC with coefficients [1.000000 -0.473154 0.638717 -0.322174 0.243055 -0.210219 0.417031 -0.452547 0.459508 -0.128858] and i want to plot the LPC spectrum. on the X axis i want to have the frequency (0Hz-4000Hz)and on the Y axis the magintude in dbs How i do that in matlab??


melp synthesis silence output

Started by steh...@hotmail.com in Speech Coding12 years ago 3 replies

Hi, I am using a codec with sampling frequency of 32KHz, I am decimating the input to get 8KHz frequency. These samples are then fed into the...

Hi, I am using a codec with sampling frequency of 32KHz, I am decimating the input to get 8KHz frequency. These samples are then fed into the MELP Analysis. The ouput of melp analysis is transmitted through a modem to the remote side. Here MELP Synthesis is called, and the speech is played by codec. I have 2 questions here, 1. As the data is being transmitted to remote side, there can be some ...


change the sampling rate of a codec

Started by khal...@hotmail.fr in Speech Coding12 years ago 1 reply

Hello everybody, Can anyone tell me if it's possible to change the sampling rate for the G723 codec ( from 8KHz to 16KHz ) and how. should...

Hello everybody, Can anyone tell me if it's possible to change the sampling rate for the G723 codec ( from 8KHz to 16KHz ) and how. should this change BitsPerSample? should this change the bitrate? Sorry for my english. Thank you in advance.


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