Integrated near-end acoustic echo and noise reduction systems

This paper presents the development of integrated near-end acoustic echo and noise reduction algorithm. The modified frequency-sampling filter (FSF) provides an effective filterbank for splitting the signal into equally spaced frequency channels. The center clipper and attenuator are employed at each frequency bin for attenuating near-end acoustic echo and noise. The adaptive clipping threshold and dynamic attenuator value are updated based on the optimized voice-activity detector (VAD). Computer simulations using speech and measured room impulse response show that the near-end acoustic echo and noise are suppressed successfully.