Thread View: comp.dsp
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Started by Bill Dorsey
Tue, 15 Dec 1992 23:14
Speech Coding and PELP
Author: Bill Dorsey
Date: Tue, 15 Dec 1992 23:14
Date: Tue, 15 Dec 1992 23:14
21 lines
1565 bytes
1565 bytes
I have an application that requires me to encode human speech at relatively low bit rates (<=9600bps) and not require a dedicated DSP processor. I'm looking for a method that could work on your typical 33MHZ 486-based PC. I realize that this may be a tall order, and certainly do not require that the speech be telephone quality -- merely intelligible would suffice for starters. I've looked into PCM, CVSD, and ADPCM, and none of these methods would seem to work at the bit rates I'm looking for. I briefly looked at CELP coding, but that would seem to require more processor bandwidth than I wish to use. Finally, PELP (Phase Excited Linear Prediction) has been mentioned as a coding method that may work given my constraints. A search of the local technical bookstore has not revealed any texts that discuss this method. If anyone can provide details on how it works, comments on its suitability, references to texts on it, or other suggestions for coding methods that may meet my requirements, I will be most grateful. -- Bill Dorsey "Most people mistake law for justice and authority for dorsey@lila.com liberty. You will hear them talk of 'liberty under law,' ripem public key and they are content to see it so deep under the law that on request it is completely obliterated." -- Herbert Spencer
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