The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 19, 1989
Filed:
May. 29, 1987
Keith R Jenkin, San Marcos, CA (US);
Shufan Chan, Encinitas, CA (US);
Animated Voice Corporation, San Marcos, CA (US);
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.