## Forums More speechcoding

## Download source code of MELP coders

inHi I want download a standard MELP coder (2400 bps). Can you show me where I can do that. thanks

Hi I want download a standard MELP coder (2400 bps). Can you show me where I can do that. thanks

## how to verify TEST VECTORS w/ Homing Sequences???

Hi all, I purchased the G.726 Test Vectors from ITU. I have written code to use these vectors to test my G.726 codec. So far, I can pass...

Hi all, I purchased the G.726 Test Vectors from ITU. I have written code to use these vectors to test my G.726 codec. So far, I can pass ALL the Test Vectors for the RESET SEQUENCES. However, I'm having problem with the HOMING SEQUENCES. I can't get any of these Test Vectors that requires HOMING SEQUENCES to pass. > From the ITU document (G.726 Appendix II Test Vectors 03/91), it

## Bit - exactness for the Fixed point iLBC code

inHi, I would like to know what is the bit-exactness (up to how many bits the output of the fixed point decoder output is matching with the...

Hi, I would like to know what is the bit-exactness (up to how many bits the output of the fixed point decoder output is matching with the floating point decoder output) for the fixed point implementation of the iLBC code. Any information in this regard would be highly appreciated. Thanks in advance, bells.

## Decoding two channel

The problem I met consist of two or more decode each one of them belong to a different channel. I'm implementig a easy routine in which a...

The problem I met consist of two or more decode each one of them belong to a different channel. I'm implementig a easy routine in which a buffer 160 element wide is create (called RBuffer[]) and fill of sample described by 16 bit. Once the "RBuffer[]" is full the buffer is passed to the encode function of speex like this: speex_bits_reset (&bits1); speex_encode_int(encStat...

## wiener filter implementation.

inHi, I am currently working on a speech enhancement project. I am implementing a noise cancellation system using Wiener filter. > From what I...

Hi, I am currently working on a speech enhancement project. I am implementing a noise cancellation system using Wiener filter. > From what I read in the text books and from the net , I got the transfer function for the filter as h(f) = {psd(noisySignal) - psd(noiseSignal) }/psd(noisySignal). I implemented this in matlab ,but the result was a highly distorted signal. I have given my procedure

## decoding more than one channel with speex_encode_int()

inThe problem I met consist of two or more decode each one of them belong to a different channel. I'm implementig a easy routine in which...

The problem I met consist of two or more decode each one of them belong to a different channel. I'm implementig a easy routine in which a buffer 160 element wide is create (called RBuffer[]) and fill of sample described by 16 bit. Once the "RBuffer[]" is full the buffer is passed to the encode function of speex like this: speex_bits_reset(&bits1); speex_encode_int(encS...

## g711 VAD

inAnyone can help finding code for g711 VAD calculation/energy calculation ? Many thanks Marly

Anyone can help finding code for g711 VAD calculation/energy calculation ? Many thanks Marly

## Windowing input signal

inHi, I want to window an audio signal using a Hamming window before I perform an autocorrelation on it. What are the criteria for choosing a...

Hi, I want to window an audio signal using a Hamming window before I perform an autocorrelation on it. What are the criteria for choosing a window length. Also, what do I do if my sequence length can not be divided up evenly by the optimum window length? i.e. do I pad the last block with zeros? Thanks R

## Generate speech signal

inHi, trying to generate a speech like signal using matlab by passing an impulse train through 3 bandpass filters in series. They have centre...

Hi, trying to generate a speech like signal using matlab by passing an impulse train through 3 bandpass filters in series. They have centre frequencies in the range 500Hz to 2kHz. I'm using wavwrite to generate an audio file and all I'm getting is a 'buzz' sound. Nothing like what I expected! Can anyone shed any light on this? L...

## G.729 Codebook search for gain quantization and decoding

My query is regarding the pre selection process done for quantization of gains in section 3.9.2 of ITU-T...

My query is regarding the pre selection process done for quantization of gains in section 3.9.2 of ITU-T recommendation for G.729 speech codec standa

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