Boots – shoes – and leggings
Patent
1989-11-21
1992-03-31
Shaw, Dale M.
Boots, shoes, and leggings
341 61, G06F 1531, H03M 746
Patent
active
051013690
ABSTRACT:
A digital filter performs a predetermined arithmetic operation on input digital data inputted thereto in time-series manner by the predetermined first sampling period to thereby generate output digital data corresponding to a second sampling frequency which is N (where N denotes an integral number) times larger than the predetermined first sampling frequency. This digital filter provides a synchronizing signal generating circuit and an operation control circuit. The synchronizing signal generating circuit detects the predetermined first sampling period of the input digital data to thereby generate a synchronizing signal having the second sampling frequency. The operation control circuit is activated by its internal clock which is asynchronous with the input digital data. This operation control circuit starts to perform its operation processes when the synchronizing signal is supplied thereto, thereafter it terminates the operation processes when a predetermined step number is completed.
REFERENCES:
patent: 4825398 (1989-04-01), Koch et al.
patent: 4870661 (1989-09-01), Yamada et al.
patent: 4918637 (1990-04-01), Morton
Bennett et al., "On the Characteristics of a Simple Architecture for Finite Impulse Digital Filtering", IEEE Trans. on Computers, vol. C-27, #12, pp. 1197-1202, Dec. 1978.
"Architecture and Instruction Set of a Programmable LSI Digital Filter" from the ICASSP 1983 Proceedings written by S. Terepin and Paul Loewenstein.
"Signal Synchronisation in Digital Audio" by W. T. Shelton, presented at the 76th Convention 1984 Oct. 8-11; Audio Engineering Society.
"ICs for Compact Disc Decoders" in the publication Electronic Components and Applications, vol. 4, No. 3, May 1982, pp. 131-141, by J. Matull.
"YM3623B" in Yamaha LSI; Yamaha Corporation, Printed in Japan, 1987; pp. 1-10.
"YM3414", in Yamaha LSI; Yamaha Corporation, printed in Japan, 1987; pp. 1-10.
Takeuchi Lenichi
Torii Junji
Usui Akira
Yamamoto Yusuke
Yamamura Masamitsu
Shaw Dale M.
Yamaha Corporation
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