Information reproducing apparatus

Details Information reproducing apparatus Information reproducing apparatus

2005-01-18

2005-01-18

Hindi, Nabil (Department: 2655)

Dynamic information storage or retrieval

Binary pulse train information signal

Including sampling or a/d converting

Reexamination Certificate

active

06845075

ABSTRACT:
In an information reproducing apparatus employing a maximum likelihood decoding method such as Viterbi decoding, there is a problem such that power consumption increases because a maximum likelihood decoding circuit is complicated, and many circuit elements must be used. A clock output control means is provided on a read clock transmission line of a maximum likelihood decoder, and no read clock is supplied to the maximum likelihood decoder in operation modes other than a specific operation mode when an input data is decoded by a Viterbi decoder, and thereby, it is possible to greatly reduce a power consumption. More specifically, in operation modes other than the read mode, the supply of read clock is stopped by the clock output control means based on a control signal from a controller for controlling an operation mode such as decoding or the like.

REFERENCES:
patent: 5995465 (1999-11-01), Hayashi et al.
patent: 6111846 (2000-08-01), Hayashi
patent: 6304538 (2001-10-01), Hayashi

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