Speech recognition system for an automotive vehicle

Details Speech recognition system for an automotive vehicle Speech recognition system for an automotive vehicle

1982-09-29

1985-07-23

Kemeny, E. S. Matt

Electrical audio signal processing systems and devices

One-way audio signal program distribution

Public address system

G10L 100

Patent

active

045312281

ABSTRACT:
A speech recognition system includes speech presence detection which uses a first level threshold of ambient noise/silence above which speech start is decided for a signal. Speech end is decided when the signal falls to a second threshold equal to the first, unless a predetermined time interval of speech is exceeded after start, causing a corrected second threshold to be calculated and used.

REFERENCES:
patent: 4052568 (1977-10-01), Jankowski
patent: 4057690 (1977-11-01), Vagliani et al.
patent: 4357491 (1982-11-01), Daabouz et al.
IBM Technical Discl. Bulletin-vol. 11, No. 4, Sep. 1968, "Signal Presence Detector w/Speech Tone Discrimination".
Bell System Technical Journal, Feb. 1976, "An Algorithm for Determining the Endpoints of . . . ".
IEEE Transactions on Acoustics, Speech & Signal Processing, vol. ASSP-29, No. 4, Aug. 1981, "An Improved Endpoint Detector for . . . ".

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