Frequency selective harmonic coding

Details Frequency selective harmonic coding Frequency selective harmonic coding

1993-06-23

1996-11-12

MacDonald, Allen R.

395 215, G10L 302, G10L 900

Patent

active

055748236

ABSTRACT:
The present invention relates to a method of encoding speech comprised of processing the speech by harmonic coding to provide, a fundamental frequency signal, and a set of optimal harmonic amplitudes, processing the harmonic amplitudes, and the fundamental frequency signal to select a reduced number of bands, and to provide for the reduced number of bands a voiced and unvoiced decision signal, an optimal subset of magnitudes and a signal indicating the positions of the reduced number of bands, whereby the speech signal may be encoded and transmitted as the pitch signal and the signals provided for the reduced number of bands with a bandwidth that is a fraction of the bandwidth of the speech.

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patent: 5226108 (1993-07-01), Hardwick et al.
A Hybrid Multiband Excitation Coder for Low Bit Rates Hassaneim et al. IEEE/25-26 Jun. 1992.
A 2400 bbs Multi-Band Excitation Vocoder Meuse IEEE/3-6 Apr. 1990.
MultiBand Excitation Vocoder Griffin et al. IEEE/Aug. 1988.

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