Method of coding voice signals and device using said method
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United States of America Patent
Stats
-
Feb 4, 1986
Grant Date -
N/A
app pub date -
Jul 19, 1982
filing date -
Jul 28, 1981
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The baseband portion x(t) of a voice signal is first applied to a complex filter which provides a couple of signal components y and y in quadrature with each other. Each of the components y and y is then fed to a bank of QMF filters which split the spectra of y and y into N subbands providing subband components y.sub.i and y.sub.i (with i=1, 2, . . . , N), respectively. The subband components y.sub.i and y.sub.i are combined together to generate information representative of the phase (.phi..sub.i) and amplitude (.rho..sub.i) of the contents of each subband, which information is then transcoded by a coder which dynamically distributes the available bit resources to the various subbands.
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Family
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