AN APPARATUS AND A METHOD FOR ECHO CANCELING MULTI-CHANNEL SOUND SIGNAL, A SIGNAL PROCESSING APPARATUS AND A SIGNAL PROCESSING METHOD USING THE SAME

The present invention relates to an apparatus and a method for processing sound signals whereby, particularly, signals are obtained by removing echo from sound signals input from at least to receivers. The apparatus includes: a receiving unit which receives a first signal and a second signal by usin...

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Bibliographic Details
Main Authors YANG, JAE MO, KANG, HONG GOO
Format Patent
LanguageEnglish
Korean
Published 29.05.2015
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Summary:The present invention relates to an apparatus and a method for processing sound signals whereby, particularly, signals are obtained by removing echo from sound signals input from at least to receivers. The apparatus includes: a receiving unit which receives a first signal and a second signal by using multiple receivers; a time delaying unit which generates a first delay signal and a second delay signal by using a previous sample signal obtained by using the receiving unit; a first prediction filter generating unit which generates a first prediction filter by using the first delay signal and the second delay signal; a second prediction filter generation unit which generates a second prediction filter by using the second delay signal and the first delay signal; a first prediction filter applying unit which generates a first prediction echo signal by applying the first prediction filter to the first delay signal and the second delay signal; a second prediction filter applying unit which generates a second prediction echo signal by applying the second prediction filter to the first delay signal and the second delay signal; a compensation filter generating unit which generates a compensation filter by using the first prediction filter and the second prediction filter; and a compensation filter applying unit that generates a first difference signal, which is difference between the first prediction echo signal and the first signal, and a second difference signal, which is difference between the second prediction echo signal and the second signal, applies the compensation filter to the first difference signal and the second difference signal, and consequently generates the signals from which the echo signals are removed. 본 발명은 음향 신호 처리 장치 및 방법에 관한 것으로, 더욱 상세하게는 두 개 이상의 수신기로부터 입력 받은 음향 신호에서 반향을 제거한 신호를 얻는 장치 및 방법에 관한 것이다. 이를 위해 본 발명은, 복수의 수신기를 이용하여 제1신호와 제2신호를 수신하는 수신부; 상기 수신부를 이용하여 획득된 이전 샘플 신호를 이용하여 제1지연신호와 제2지연신호를 생성하는 시간지연부; 상기 제1지연신호와 제2지연신호를 이용하여 제1예측필터 생성하는 제1예측필터생성부; 상기 제2지연신호와 제1지연신호를 이용하여 제2예측필터를 생성하는 제2예측필터생성부; 상기 제1지연신호 및 제2지연신호에 상기 제1예측필터를 적용하여 제1예측반향신호를 생성하는 제1예측필터적용부; 상기 제1지연신호 및 제2지연신호에 상기 제2예측필터 적용하여 제2예측반향신호를 생성하는 제2예측필터적용부; 상기 제1예측필터와 제2예측필터를 이용하여 보상필터를 생성하는 보상필터생성부; 및 상기 제1예측반향신호와 상기 제1신호의 차분값인 제1차분신호 및 상기 제2예측반향신호와 상기 제2신호의 차분값인 제2차분신호를 생성하고, 상기 제1차분신호와 제2차분신호에 상기 보상필터를 적용하여 반향신호가 제거된 신호를 생성하는 보상필터 적용부; 를 포함하는 것을 특징으로 하는 신호처리장치를 제공한다.
Bibliography:Application Number: KR20130142387