Computer speech system

Details Computer speech system Computer speech system

1987-05-29

1989-12-19

Kemeny, Emanuel S.

Electrical audio signal processing systems and devices

One-way audio signal program distribution

Public address system

381 36, 381 43, 381 51, G10L 500

Patent

active

048888060

ABSTRACT:
A computer speech system for digitally storing and reproducing representations of human speech. An analog waveform representative of a segment of speech is compressed for storage by storing companded differences between adjacent local maxima and minima of the waveform together with the lengths of time between the occurrences of the maxima and minima. The compressed speech is reproduced by looking up precomputed values in a lookup table according to the companded differences and times and furnishing the values from the lookup table to a digital-to-analog converter and thence to a conventional audio output device. The values are furnished to the converter by putting them on lower bits of the address bus and performing an operation at an address to which the converter responds. A plurality of segments of speech are stored by selecting, for each segment, a preferred type of representation from a list of options that includes raw data, compressed speech, fricative sounds, repetition of a previous segment, or hold a constant value. A representation of compressed speech is converted into audible speech or is displayed on a computer monitor or analyzed according to a procedure such as a mathematical rule.

REFERENCES:
patent: 4271332 (1981-06-01), Anderson
patent: 4415767 (1983-11-01), Gill et al.
patent: 4682292 (1987-07-01), Bue et al.
patent: 4707857 (1987-11-01), Marley et al.
Reader's Digest, Mar. 1987, p. 36, "Computer Tutor".
Ramport Product Line Catalog--Hitech Equipment Corp., Jan. 1987.

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