Acoustic Echo Canceller System Materialized with a 16-bit Fixed Point Processing Type DSP
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概要
- 論文の詳細を見る
This paper introduces an acoustic echo canceller system materialized with a 16-bit fixed point processing type DSP (Analog Devices, ADSP-2181). This experimental system uses the tri-quantized-x individually normalized least mean square (INLMS) algorithm little degrading the convergence property under the fixed point processing. The experimental system also applies a small step gain to the algorithm to prevent the double-talk from increasing the estimation error. Such a small step gain naturally reduces the convergence speed. The experimental system compensates the reduction by applying the block length adjustment technique to the algorithm. This technique enables to ceaselessly update the coefficients of the adaptive filter even when the reference signal power is low. The experimental system thus keeps the echo return loss enhancement (ERLE) high against the double-talk.
- 社団法人電子情報通信学会の論文
- 1999-12-25
著者
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FUJII Kensaku
Graduate School of Engineering, University of Hyogo
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Fujii K
Faculty Of Engineering University Of Hyogo
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Sakaguchi Jun'ichi
Network Systems Laboratories (l40) Fujitsu Laboratories Ltd.
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Fujii Kensaku
Network Systems Laboratories (l40) Fujitsu Laboratories Ltd.
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Ohga Juro
Network Systems Laboratories (l40) Fujitsu Laboratories Ltd. : The Faculty Of Engineering Shibaura I
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Ohga Juro
Network Systems Laboratories (l40) Fujitsu Laboratories Ltd.
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Fujii K
The Graduate School Of Engineering University Of Hyogo
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HOSHINO Tsutomu
Network Systems Laboratories (L40), FUJITSU LABORATORIES LTD.
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Hoshino Tsutomu
Network Systems Laboratories (l40) Fujitsu Laboratories Ltd.
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