Cross talk removing device utilizing signal from main track to s

Details Cross talk removing device utilizing signal from main track to s Cross talk removing device utilizing signal from main track to s

1996-12-13

1998-03-17

Nelms, David C.

Dynamic information storage or retrieval

Condition indicating, monitoring, or testing

Including radiation storage or retrieval

369 4437, 369 4432, 369107, 369124, G11B 700

Patent

active

057295140

ABSTRACT:
A device for removing a crosstalk component mingled from an adjacent track to a target track from a reproduction signal of the target track is provided for automatically adjusting a coefficient on which the amplitude of the reproduction signal of the adjacent track is adjusted for generating a crosstalk component signal. A crosstalk component signal generating unit 20 operates to generate a crosstalk component signal 20E or 20F by adjusting an amplitude of a signal 21a or 22a having a suppressed high frequency component of each reproduction signal ERF or FRF of the adjacent track with respect to the coefficient KE or KF. A subtracting unit 30 operates to output subtract the crosstalk component signal 20E or 20F from a main reproduction signal MRF for outputing a crosstalk-removed signal 8a. A correlation operating unit 42 or 52 included in the coefficient setting unit 40 or 50 operates to derive a correlation between the crosstalk-removed signal 8a and the signal 21a or 22a having the suppressed high frequency component. A coefficient increasing or decreasing unit 43 or 53 operates to increase the coefficient KE or KF if the correlation is positive or decrease the coefficient KE or KF if the correlation is negative.

REFERENCES:
patent: 4980877 (1990-12-01), Sugiyama et al.
patent: 5138872 (1992-08-01), Maeda
patent: 5144616 (1992-09-01), Yasukawa et al.
patent: 5181161 (1993-01-01), Hirose et al.
patent: 5373437 (1994-12-01), Itoh et al.
patent: 5483515 (1996-01-01), Cheng et al.

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