Electrical audio signal processing systems and devices – Dereverberators
Patent
1997-03-24
1998-06-30
Kuntz, Curtis A.
Electrical audio signal processing systems and devices
Dereverberators
381 711, 379406, 379410, H04B 320, H04M 100, H04M 900
Patent
active
057745625
ABSTRACT:
In a method and an apparatus for dereverberation provided speech from speaker is received by a first and second channel microphones which are disposed at different locations, and is input to a first and a second channel reverberant speech input terminal. Input signal in each channel is processed by an inverse filter processor, and a dereverberation evaluation part evaluates dereverberation performance on the basis of an output signal from the inverse filter processor and the input signals of respective channels. Subsequently, filter coefficients in the inverse filter processor are determined and updated in accordance with the evaluation so that a result of evaluation is brought closer to an optimum. By repeating this process, an optimum dereverberation is always enabled in a manner following a variation in an in-room impulse response.
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Furuya Kenichi
Kaneda Yutaka
Barnie Rexford
Kuntz Curtis A.
Nippon Telegraph and Telephone Corp.
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