임베디드 시스템에 탑재된 적응형 테일 길이를 갖는 광대역 어커스틱 에코 제거 장치의 구조
황인기, 추창연, 김도영, 이병선
- 9042566 (2015.05.26)
- A wideband acoustic echo cancellation apparatus with an adaptive tail length in an embedded system, and a wideband acoustic echo cancellation method are provided, and the wideband acoustic echo cancellation apparatus may include a delay length calculating unit to calculate a delay length of an echo path, using a near-end signal and a far-end signal, an adaptive filter implementing unit to implement an adaptive filter based on the calculated delay length, using selected coefficients, and an error calculating unit to search for three intervals having a largest impulse response value from all intervals of a tail of the adaptive filter, and to calculate an error during an interval in which the selected coefficients are used.
- KSP 제안 키워드
- Acoustic echo, Acoustic echo cancellation, Echo cancellation, Embedded system, Tail length, adaptive filter, impulse response