Interference reduction system for a speech recognition device

Details Interference reduction system for a speech recognition device Interference reduction system for a speech recognition device

1991-02-19

1993-08-31

Eisenzopf, Reinhard J.

Telecommunications

Transmitter and receiver at same station

With transmitter-receiver switching or interaction prevention

455297, 455345, 381 42, 381 46, 381110, H04B 146, G10L 506

Patent

active

052416925

ABSTRACT:
An apparatus for reducing audio interference produced by a transducer (18) in response to an audio signal has a first input for receiving the audio signal and a second input (22) for receiving sound signals. The audio interference affects a speech recognition system (34). The second input provides a possibly contaminated signal representing the sound signals. The sound signals comprise a desired audio signal, and possibly comprise the audio interference. An interference reduction device (30) is coupled to the first and second inputs, for transforming the possibly contaminated signal into features that are substantially free from the effects of the audio interference.

REFERENCES:
patent: 4625083 (1986-11-01), Poikela
patent: 4737976 (1988-04-01), Borth et al.
patent: 4769847 (1988-09-01), Taguchi
patent: 4945570 (1990-07-01), Gerson et al.

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