Method of coding voice signals and device using said method

Details Method of coding voice signals and device using said method Method of coding voice signals and device using said method

1982-07-19

1986-02-04

Kemeny, E. S. Matt

Electrical audio signal processing systems and devices

Binaural and stereophonic

Hearing aid

381 34, G10L 100

Patent

active

045690758

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.

REFERENCES:
patent: 3360610 (1967-12-01), Flanagan
patent: 3484556 (1969-12-01), Flanagan et al.
patent: 4142071 (1979-02-01), Grosier et al.
patent: 4184049 (1980-01-01), Crochiere et al.
patent: 4216354 (1980-08-01), Esteban et al.

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