ADAPTIVE DIGITAL FILTER

Japanese Patent JP3348845

B2

PROBLEM TO BE SOLVED: To decrease the number of registers and the power consumption and to speedily converge coefficients by performing coefficient adaptive operation by a non-pipeline processing according to input data and the filter operation data from a pipeline filter arithmetic circuit so that the filter operation data converges to a prescribed reference value.
SOLUTION: The pipeline filter operation circuit 100 performs filter operation by a pipeline processing according to input data xi and coefficient data Ci (where i is an integer between 1 and n) and outputs operation data y' and filter output data (y). A non-pipeline adaptive circuit 110 performs coefficient adaptive operation by a non-pipeline processing according to the input data xi and operation data y' so that the operation data y' outputted by the arithmetic circuit 100 converge to a prescribed reference value Y. The resulting coefficient data ci are outputted by the adaptive circuit 110 to the arithmetic circuit 100. Consequently, the number of registers needed for the adaptive circuit 110 decreases, the power consumption is reduced, and the delay decreases, so that coefficient adaptive operation can be performed at a high speed.

Akira Yamamoto
Hiroyuki Nakahira
Hirokuni Fujiyama
Hiroki Mohri

JP2000073176A

November 20, 2002

March 15, 2000

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Matsushita Electric Industrial Co., Ltd

H03H21/00; G06F17/10; H03H17/02; H03H17/06; (IPC1-7): H03H21/00; G06F17/10; H03H17/02; H03H17/06

JP669759A
JP2214322A
JP6484910A
JP3117206A
JP887411A

Shusaku Yamamoto

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