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LP algorithm that stops after a certain amount of energy is reached

Started by geistgesicht in Speech Coding17 years ago 1 reply

Dear group, The impulse response of a pure recursive filter with linear prediction coefficients as filter coefficients is a good spectral...

Dear group, The impulse response of a pure recursive filter with linear prediction coefficients as filter coefficients is a good spectral description of a signals spectrum but the Levinsons recursion always calculates a fixed number of coefficients. Does anyone know an algorithm that calculates linear prediction coefficients and stops calculation after a certain amount of error-energy i...


CELP using VC++

Started by yaso21101975 in Speech Coding18 years ago 2 replies

hi all I am working on a project on audio compression using code excited linear prediction (CELP) techniques. My aim is to design a...

hi all I am working on a project on audio compression using code excited linear prediction (CELP) techniques. My aim is to design a basic working CELP codec using visual c++ under windows. i have some problem reading data chunk from riff format file using vc++ whene i try to read a block of 240 byte only 60 byte are read and the rest of buffer is zero i try different commandes (_read,fread...


Design of basic CELP codec

Started by Amit Solanki in Speech Coding18 years ago 2 replies

I am working on a project on audio compression using code excited linear prediction (CELP) techniques. My aim is to design a basic working CELP...

I am working on a project on audio compression using code excited linear prediction (CELP) techniques. My aim is to design a basic working CELP codec in matlab. Since audio processing is new to me I am confused with some of the details of algorithms:- Firstly, the input to Short Term predictor(STP) is the original or the preprocessed speech and the input to Long term predictor(LTP) is the ...


Advantages & Disadvantages of ACELP & QCELP

Started by prob...@yahoo.com in Speech Coding18 years ago 1 reply

Hi, my name is Novi, I would like to know the advantages of disadvantages of ACELP & QCELP, when compared to CELP. Can anyone please tell me?...

Hi, my name is Novi, I would like to know the advantages of disadvantages of ACELP & QCELP, when compared to CELP. Can anyone please tell me? Thank you very much..


ADPCM decoder required

Started by Sanjam in Speech Coding18 years ago 2 replies

Hi all. I am recording voice using ML2390 codec. It records speech in the ADPCM format. Now I wish to listen to the recorded data to validate...

Hi all. I am recording voice using ML2390 codec. It records speech in the ADPCM format. Now I wish to listen to the recorded data to validate whatever I have recorded. I need an ADPCM decoder for that. I tried out downloading numerous ADPCM players and decoders from the net but none proved to be useful. Can anyone come up with some solid solution for the same.? How can I use G.726 standar...


how to choose DSP processor

Started by msai...@yahoo.co.in in Speech Coding18 years ago 1 reply

Hai, I am a new member to this group. I am presently working on Code excited linear predective coding.I want to impliment this on a 16bit DSP...

Hai, I am a new member to this group. I am presently working on Code excited linear predective coding.I want to impliment this on a 16bit DSP processor.I am new to DSP processors.Please suggest me which DSP processor is more suitable for this and please suggest whether ADSP2181 processor is suitable. with regards, m sai yogesh.


Re: abt VAD algorithm 1 of AMR codec

Started by rock...@yahoo.com in Speech Coding18 years ago

hi sameer, do you still have the c-code for the vad you mentioned below. i'm working on it now and it would be quite helpful if you could help me...

hi sameer, do you still have the c-code for the vad you mentioned below. i'm working on it now and it would be quite helpful if you could help me out with it. looking forward to it. if anyother member has it.... plz forward it to me .. thank you, rakesh > > > > Hi all! > > i have a query regarding the VAD algorithm 1 used in GSM AMR speech codec.one of > the steps in thi


High pass filter

Started by dane...@gmail.com in Speech Coding18 years ago 4 replies

Hw do we supress 50/60hz hum in the codec if the codec doesnt have any high pass filte option?

Hw do we supress 50/60hz hum in the codec if the codec doesnt have any high pass filte option?


My accuracy for GSM and CELP(4.8kbs) Is Low. Why?

Started by Nash in Speech Coding18 years ago

im new to speech coding. Currently im trying to calculate speech recognition accuracy for TIMIT corpus which is coded using GSM and CELP...

im new to speech coding. Currently im trying to calculate speech recognition accuracy for TIMIT corpus which is coded using GSM and CELP 4.8kbps coder. im using HTK toolkit. i find out the my speech recognition accuracy drop drastically when i tested coded speech using the acoustic model trained using NIST (wav) file from TIMIT corpus.below i list down my method and can someone of you ...


MIPS on ARM9

Started by sanj...@acmet.com in Speech Coding18 years ago 1 reply

What are the minimum MIPS achievable by optimizing G.723.1 ITU standard on 120 MHz ARM9 RISC processor?

What are the minimum MIPS achievable by optimizing G.723.1 ITU standard on 120 MHz ARM9 RISC processor?


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