Method and apparatus for pitch controlled voice signal processin

Details Method and apparatus for pitch controlled voice signal processin Method and apparatus for pitch controlled voice signal processin

1986-12-01

1987-10-13

Kemeny, E. S. Matt

Electrical audio signal processing systems and devices

One-way audio signal program distribution

Public address system

3645135, G10L 500

Patent

active

047003910

ABSTRACT:
Digital processing of speech signals for compression/expansion pitch change is provided by writing and reading a ROM at different rates and controlling the discard/repeat segments of memory to be integral multiples of the pitch period. The rear pointer jumps a portion of the memory to either skip a portion (in compression) or retrace a portion (in expansion) of the recorded information. The read pointer jumps so as to avoid crossing the write pointer (thereby avoiding reading old recorded information). The jump occurs when a predetermined spacing or condition is reached between read and write pointers.

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The Journal of the Acoustical Society of America, vol. 41, No. 1, 1967, pp. 60-65, New York, US; R. J. Scott, "Timing Adjustment in Speech Synthesis". * Paragraph I, Time Adjustment According to Fundamental Voice Periods*.
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The Journal of the Acoustical Society of America, vol. 63, No. 2, Feb. 1978, pp. 624-625, New York, US; E. P. Neuburg; "Simple Pitch-Dependent Algorithm for High-Quality Speech Rate Changing", *p. 625, left-hand column, lines 2-15*.
Frequenz, vol. 35, No. 10, Oct. 1981, pp. 265-270, Berlin, DE; H. Ney: "Bestimmung der Zeitverlaufe von Intensitat und Grundperiode der Sprache fur die automatische Sprechererkennung", *p. 268, right-hand column, line 45-p. 269, left-hand column, line 13*.
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