A real-time acoustic human-machine front-end for multimedia applications integrating robust adaptive beamforming and stereophonic acoustic echo cancellation
نویسندگان
چکیده
Joint beamforming microphone arrays and multi-channel acoustic echo cancellation (AEC) can be ef£ciently applied for handsfree speech communication. Especially, systems relying on adaptive generalized sidelobe canceller (GSC) structures are very promising, since they combine high noise-reduction performance with computational ef£ciency. So far, robustness of the GSC was very challenging, due to reverberation and non-stationarity of desired signals and interferers. In this contribution, we present for the £rst time a real-time system which integrates GSC and stereophonic AEC. It is robust against desired signal cancellation while highly suppressing interference and acoustic echoes. The realization on a low-cost PC platform, with the microphone array connected directly to the universal serial bus (USB), provides maximum hardware and software compatibility for personalized mobile computing devices and desktop PCs.
منابع مشابه
An Acoustic Human-Machine Front-End for Multimedia Applications
A concept of robust adaptive beamforming integrating stereophonic acoustic echo cancellation is presented which reconciles the need for low-computational complexity and efficient adaptive filtering with versatility and robustness in real-world scenarios. The synergetic combination of a robust generalized sidelobe canceller and a stereo acoustic echo canceller is designed in the frequency domain...
متن کاملA Real - Time Acoustic Human - Machine Applications Integrating Robust Ad Stereophonic Acoustic Ech
Joint beamforming microphone arrays and multi-channel acoustic echo cancellation (AEC) can be efficiently applied for hands-free speech communication. Especially, systems relying on adaptive generalized sidelobe canceller (GSC) structures are very promising, since they combine high noise-reduction performance with computational efficiency. So far, robustness of the GSC was very challenging, due...
متن کاملروشی نو برای حذف پژواک آکوستیکی استریو با استفاده از ساختار مبتنی بر الگوریتم وفقی با ورودی برش یافته
Stereophonic acoustic echo cancellation is one of the expanding areas in the field of the speech/multimedia communication systems. In a conventional stereophonic acoustic echo canceller, working in a stereo communication system, the existence of the strong cross-correlation between the input signals to the two channels has the problem of the low convergence speed of the weights of the adaptive ...
متن کاملStudies of a Wideband Stereophonic Acoustic Echo Canceler
In this paper a wideband stereophonic acoustic echo canceler is presented. The fundamental difficulty of stereophonic acoustic echo cancellation (SAEC) is described and an echo canceler based on a fast recursive least squares algorithm in a subband structure is proposed. This structure have been used in a real-time implementation, on which experiments have been performed. In the paper, simulati...
متن کاملStereophonic Acoustic Echo Cancellation: Theory and Implementation
The thesis treats theory and implementation aspects for stereophonic acoustic echo cancellation. In Paper I a complete implementation of a stereophonic acoustic echo canceler based on the two-channel fast recursive least-squares algorithm is presented. An analysis of the system calculation complexity is also given, in addition to simulation results on recorded real-life data. Paper II presents ...
متن کامل