Vector encoding method, in particular for voice signals
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United States of America Patent
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Mar 17, 1998
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N/A
app pub date -
Nov 7, 1995
filing date -
May 7, 1993
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Abstract
The vector encoding method, particularly for voice signals, includes storing autocorrelation coefficients in one codebook and performing a logic operation on the autocorrelation coefficients with an autocorrelation function for the pulse response of an excitation filter to give the energy of the filtered excitation signal. For additional data reduction only those values having three autocorrelation coefficients other than the value 0 are entered in the codebook. The combination patterns which can be formed from these coefficients occur with the same frequency in the codebook. Because of these features, a transmission of encoded data which is very robust with respect to faults is possible with reduced processing and storage effort.
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