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Eco-damper and non-linear processor for an echo cancellerEco-damper and non-linear processor for an echo canceller re
Eco-damper and non-linear processor for an echo cancellerEco-damper and non-linear processor for an echo canceller re
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机译:用于回声消除器的生态阻尼器和非线性处理器用于回声消除器的生态阻尼器和非线性处理器
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摘要
The invention relates to an acoustic echo suppressor and a non-linear processor for an echo canceller in a 4-wire data transmission network. An echo canceller is typically controlled by comparing the power levels of the near-end and far-end signals. The transfer function of an acoustic echo path is usually very non-uniform. According to the invention, the spectrum of the far-end signal is treated, before the signal power level is calculated, with a weighted filter, which models the effect of the transfer function of acoustic echo. As a result, the double talk dynamics is improved, since high-energy vowels of far-end speech, which normally cause low-energy vowels of near-end speech to be clipped in an echo suppresseor, will be attenuated.
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