Control signal generation apparatus for a digital information si

Details Control signal generation apparatus for a digital information si Control signal generation apparatus for a digital information si

1996-08-02

1999-03-02

Young, W. R.

Dynamic magnetic information storage or retrieval

General processing of a digital signal

In specific code or form

360 51, 341 58, G11B 509, H03M 500

Patent

active

058779094

ABSTRACT:
A control signal generation apparatus for use in a digital information signal recording system enables an optimum channel word of two channel words output from two precoders to be recorded on a digital record medium. The control signal generation apparatus compares the same kind of spectrum components from among peak, notch, and dip components detected from the two channel words, and generates a control signal for selecting an optimum channel word. The apparatus includes a gain controller for controlling the gains of integrators used for detecting the peak, notch, and dip components. The gain controller compares the detected peak, notch, and dip components with upper limit and lower limit set reference values, and generates a gain control signal according to the comparison results. Accordingly, the present invention can reduce the amount of required hardware circuitry, compared to the conventional apparatus which adds the peak, notch, and dip components detected from an individual channel word, and then compares the addition results with each other. An automatic gain controller is included which allows the number of the maximum allowable bits to be reduced, and which increases the processing speed of an integrator.

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patent: 5245483 (1993-09-01), Van Gestel
patent: 5432651 (1995-07-01), Maeno et al.
patent: 5602547 (1997-02-01), Maeno et al.
patent: 5659577 (1997-08-01), Ohishi

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