H - Electricity – 04 – R
Patent
H - Electricity
04
R
354/47, 379/81
H04R 3/00 (2006.01) G10K 11/00 (2006.01) G10K 11/178 (2006.01)
Patent
CA 1110768
A METHOD AND APPARATUS FOR REMOVING ROOM REVERBERATION Abstract of the Disclosure Room reverberation and other uncorrelated signal sources characteristic of monaural systems are removed, in accordance with the principles of this invention, by employing two microphones at the sound source and by manipulating the signals of the two microphones to develop a single nonreverberant signal. Both early echoes and late echoes in the signal received by each microphone are removed by manipulating the signals of the two microphones in the frequency domain. Corresponding frequency samples of the two signals are co-phased and added and the magnitude of each resulting frequency sample is modified in accordance with the computed cross-correlation between the corresponding frequency samples. The modified frequency samples are combined and transformed to form the nonreverberant or correlated signal portion.
301523
Kirby Eades Gale Baker
Western Electric Company Incorporated
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