Multi-pulse speech coding/decoding with reduced convolution processing
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United States of America Patent
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app pub date -
Mar 8, 2005
filing date -
Apr 20, 2001
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Abandoned
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Abstract
The present invention provides methods and systems for efficiently compressing information, such as speech data. By generating an excitation signal containing a number of zero and non-zero values and convolving the first signal with a known transfer function, a signal such as a codec residual signal can be compressed. While a convolution between any two signals can require a large number of multiply-and-accumulate operations, convolution between an excitation signal and impulse response can be made more efficient by multiplying only the non-zero values of the excitation signal with respective values of the impulse response.
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