Adaptive Echo Cancellation Using Gamma Filters
نویسندگان
چکیده
This paper studies the performance of the Tap Delay line (TDL) and the Gamma Filter in the application of echo cancellation. The TDL and Gamma filter architecture is implemented using the Least Mean Squares (LMS) algorithm. Experimental results indicate that the Gamma filter outperforms the TDL with respect to the intelligibility of the speech recovered and the number of tap weights used in the filter. The results of exchanging the inputs are also presented.
منابع مشابه
Genetic algorithm for Echo cancelling
In this paper, echo cancellation is done using genetic algorithm (GA). The genetic algorithm is implemented by two kinds of crossovers; heuristic and microbial. A new procedure is proposed to estimate the coefficients of adaptive filters used in echo cancellation with combination of the GA with Least-Mean-Square (LMS) method. The results are compared for various values of LMS step size and diff...
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 کاملAdaptive Filter Application in Echo Cancellation System and Implementation using FPGA
In telephony system, the received signal by the loudspeaker, is reverberated through the environment and picked up by the microphone. It is called an echo signal. Which is in the form of time delayed and attenuated image of original speech signal, and causes a reduction in the quality of the communication. Adaptive filters are a class of filters that iteratively alter their parameters in order ...
متن کاملAdaptive Volterra filters for nonlinear acoustic echo cancellation
More than 20 years ago it was shown that adaptive Volterra filters can be used for telephone echo cancellation, but the inherent need for a large number of coefficients has inhibited their practical use. Recently, first attempts have been made to combat nonlinearities in the acoustic echo path of hands-free telephones, which are caused by low-cost audio components. As these attempts are based o...
متن کاملA Multi-filter Approach to Acoustic Echo Cancellation for Teleconferencing
We have designed and tested an acoustic echo cancellation system for speech teleconferencing. Our algorithm is based on a least-mean-square (LMS) frequency domain adaptive filter (FDAF) and uses a novel filter-update technique using many (at least 3) simultaneously running filters. We find the new multi-filter to converge faster than similar LMS FDAF’s for echo cancellation, and find it to be e...
متن کامل