混合されたウェーブフィールドを個別の要素に分解するためのシステム及び方法

Japanese Patent JP4173280

B2

A system and method for factoring a merged wave field, such as a merged acoustic wave field, into independent source signals uses an array of sensors to sense the merged wave field and a signal processor to determine the factored source signal data. One application for the system and method is in a hearing aid to allow an individual to selectively listen to one individual in a group of individuals speaking simultaneously. The system and method factors the merged wave field by predicting the source signals and combining the predicted source signals with source delay values associated with each of the sound or energy sources to form predicted sensor signals. The source delay values can be set as predetermined values or can be calculated using a cross-correlation process. The predicted sensor signals are compared to the actual sensor signals output by each sensor to determine a prediction verification factor. The predicted source signals are adjusted using a random process that minimizes the prediction verification factor. The adjustment and verification of the predicted source signals is performed iteratively until the prediction verification factor reaches a predetermined minimum value. The predicted source signals are then output as factored source signals and can be selected for further processing, such as by transmitting the signal to the user.

JP3171756	NOISE ELIMINATION DEVICE
WO/2015/165074	APPARATUS AND METHOD FOR FILTERING NOISES IN SIGNAL

Strandberg Malcolm Wavy

JP2000525992A

October 29, 2008

December 14, 1998

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Strandberg Malcolm Wavy

H04B15/00; H04B3/20; H04R25/00; H04R1/40; H04R3/00; H04S7/00

JP10510127A
JP61254870A
JP9021863A
JP9512676A

Tsutomu Adachi
Toshihiro Tanaka

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