## how lpc to lsp co-efficients ?

Started by in Speech Coding17 years ago 1 reply

hi all, i d'nt know how they are converting the LPC co-efficients to LSP co-efficients i want some explanation regarding these....

hi all, i d'nt know how they are converting the LPC co-efficients to LSP co-efficients i want some explanation regarding these. can anyone help me. tamij

## DOD LPC 10 standar

Started by in Speech Coding20 years ago 2 replies

ok, nice to know this mail group still working. I am currently doing a project for my Bsc degree, its about Implementation of...

ok, nice to know this mail group still working. I am currently doing a project for my Bsc degree, its about Implementation of speech coding based on LPC 10 using DSP Processor TMS320C25. Before i implement the coding scheme using tms320c25 i first simulate it using MATLAB. However, s

## Re: Digest Number 144

Started by in Speech Coding18 years ago

hi michael, I am a student currently working on the G.729 standard of ITU-T for speech compression. In that, it uses LPC 10...

hi michael, I am a student currently working on the G.729 standard of ITU-T for speech compression. In that, it uses LPC 10 and converts the incoming input file (which can be a wav file) sampled at 8 khz to LPC 10 coefficients. you can refer to that standard for de

## Zero Excitation

Started by in Speech Coding16 years ago

In a CELP coder given a set of LPC coeff, without any other initial conditions How can we generate (s[n]-r[n]), using zero...

In a CELP coder given a set of LPC coeff, without any other initial conditions How can we generate (s[n]-r[n]), using zero excitation. (or how to extract information only from LPC coeff ) where, s[n]- original speech signal & r[n]- residual signal. Eagerly waiting for

## All pole LPC

Started by in Speech Coding17 years ago 4 replies

Hi, 1. According to statement given in book "Digital Speech" by A.M.Kondoz: "The LPC spectral envelope matches the signal...

Hi, 1. According to statement given in book "Digital Speech" by A.M.Kondoz: "The LPC spectral envelope matches the signal spectrum much better in the spectral peaks than spectral valleys. This can be expected as our model transfer function, H(z), on

## LPC-10 sample files and tools

Started by in Speech Coding18 years ago

Hi, I am a member of an international home-computer-community for the vintage TI99....(look at TI99-4a on Yahoogroups), this...

Hi, I am a member of an international home-computer-community for the vintage TI99....(look at TI99-4a on Yahoogroups), this old system used the TMS5200/5220 Speech-processor for some special features. I am looking the whole internet for some sample binary files in LPC-10 (sam

## ill-conditioning in LPC

Started by in Speech Coding16 years ago

Dear multiple recipients of the Group "Speech coding": Presently, I am doing some simulations on LPC-based speech coders. I...

Dear multiple recipients of the Group "Speech coding": Presently, I am doing some simulations on LPC-based speech coders. I am facing the ill-conditioning of the Gram-Matrix. How do I correct it? I know that I have to add a small amount o

## linear predictive coding

Started by in Speech Coding9 years ago

hello i am student of final year. i am doing a project on isolated word recognition using LPC and euclidean distance method .I have a doubt pls...

hello i am student of final year. i am doing a project on isolated word recognition using LPC and euclidean distance method .I have a doubt pls help me LPC changes every 20 msec or so. At a sampling rate of 8000 samples/sec, 20 msec is equivalent to 160 samples. The digital speech signal is divided into frames of size 20 msec. There are 50 frames/second. for each frame there will be p c...

## Needed reference on line spectrum pair representation of LPC coefficients

Started by in Speech Coding17 years ago 2 replies

Hello, My friends and scholors, I am looking for the reference on "line spectrum pairs representation of LPC...

Hello, My friends and scholors, I am looking for the reference on "line spectrum pairs representation of LPC coeeficients"... If anybody have references on this topic could you please send me? Thank you vijay

## Vector quantization of speech

Started by in Speech Coding13 years ago

Hi, I am working on low bit rate speech coding. I have efficiently quantized the lpc coefficients using vector quantization methods. I am...

Hi, I am working on low bit rate speech coding. I have efficiently quantized the lpc coefficients using vector quantization methods. I am looking at an efficient way of quantizing the residue signal which is an important by product of the lpc analysis. Can anyone suggest e a good method of quantizing the residue signals? With Regards, Abhishek S

## Re: All pole LPC filter again

Started by in Speech Coding17 years ago 2 replies

Hi Great to have a good follow-up on an interesting topic. It would be great if more who have good exposure to this topic, join...

Hi Great to have a good follow-up on an interesting topic. It would be great if more who have good exposure to this topic, join in. >All the reasonings given for 10th order LPC is plausible. But i >encountered >50th order filter >in G.728(LD-CELP

## lpc-10 coded speech

Started by in Speech Coding16 years ago

Hi all, I remember that Texas Instruments have had a big library with pre-coded words, spoken by a TV-moderator from Dallas...

Hi all, I remember that Texas Instruments have had a big library with pre-coded words, spoken by a TV-moderator from Dallas Radio located in Dallas/Tx. This was a library of single words and phrases coded n lpc-10 with 8KHz-sample-frequency for the TMS52xx speech-synthesizer f

## simple real time implementation

Started by in Speech Coding19 years ago

Hi all, i am now looking for simple realtime implementation of codec (pseudo-celp) . The codec api gives me samples in array buffer ...

Hi all, i am now looking for simple realtime implementation of codec (pseudo-celp) . The codec api gives me samples in array buffer #define BUF_SIZE 240 int buffer[BUF_SIZE]; now i start in this way dc_rmv(buffer,filtersp); and carry on with rest of modules , like lpc,lpc

Started by in Speech Coding12 years ago

Hello, I am doing M.Tech. project on CELP in real time using DSP kit TMS320c6713 Note that I had refer CELP demo given in simulink. ...

Hello, I am doing M.Tech. project on CELP in real time using DSP kit TMS320c6713 Note that I had refer CELP demo given in simulink. I am using simple gaussian codebook ,LPC parameters(LPC co-efficients and reflection co-efficients). My problem is how to find index for codebook? what will be gain for excitation signal coming from codebook?This gain will be constant or variable ...

## Recursive least squares and LPC

Started by in Speech Coding11 years ago

Hi All, I have implemented a 10th order Recursive Least Squares filter on Matlab for speech and am comparing the weights thus obtained with...

Hi All, I have implemented a 10th order Recursive Least Squares filter on Matlab for speech and am comparing the weights thus obtained with the weights using the LPC function. Then I am comparing the speech quality using PESQ MOS values for various speech files. I run my RLS for lambda=1 (forgetting factor) and delta=.02 (regularization factor), which gives the best performance. ...

## Computationally Efficient LPC Coefficients Estimation Methods

Started by in Speech Coding13 years ago

Hi All, I am a new member of this group. I am doing my MTech from NIT Warangal. I am trying to implement LPC Coefficients Estimation in fixed...

Hi All, I am a new member of this group. I am doing my MTech from NIT Warangal. I am trying to implement LPC Coefficients Estimation in fixed point arithmetic and looking for a computationally efficient method for implementation. As per my knowledge, Levinson-Durbin method is more computationally efficient algorithm. Can any body tell me if there is more computationally efficient and stable alg...

## MELPe higher than 2400bps

Started by in Speech Coding11 years ago

Hi, I am working on a MELPe vocoder at a rate higher than 2400bps. I just was trying to increase the number of LPC's to 12. And the code some...

Hi, I am working on a MELPe vocoder at a rate higher than 2400bps. I just was trying to increase the number of LPC's to 12. And the code some how introduces a tonal noise into the speech. If I increase the number of LPC's further, the noise in the reconstructed speech further increases. I give it a 21sec speech and there is a tone at about 1.65s and one at 14.5s. Did anybody try to increase t...

## linear prediction

Started by in Speech Coding14 years ago

can any one tell me how to use lpc technics to reconstruct clipped signal with matlab

can any one tell me how to use lpc technics to reconstruct clipped signal with matlab

## Reconstructing Speech

Started by in Speech Coding12 years ago

I am new to Signal Processing. How do I reconstruct the speech (synthesized), after determining the Pitch, the LPC coefficients, and the Gain?...

I am new to Signal Processing. How do I reconstruct the speech (synthesized), after determining the Pitch, the LPC coefficients, and the Gain? Thanks in advance.

## LPC method

Started by in Speech Coding10 years ago 1 reply

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