Method and apparatus for automatically selecting a noise reducti

Details Method and apparatus for automatically selecting a noise reducti Method and apparatus for automatically selecting a noise reducti

1994-08-05

1996-12-10

Psitos, Aristotelis

Dynamic magnetic information storage or retrieval

General recording or reproducing

327558, 327559, G11B 502

Patent

active

055837093

ABSTRACT:
Method and apparatus automatically select, in a playback mode, a noise reduction circuitry of a noise reduction system by which a middle-to-high frequency signal of a low level included in a recording signal is compressed in dynamic range for recording and the compressed middle-to-high frequency signal is expanded in dynamic range in the playback mode, thereby suppressing middle to high frequency noises in the reproduction signal. A level difference .DELTA.L between the maximum and minimum signals of the low frequency component in the reproduction signal and a level difference .DELTA.H between the maximum and minimum signals of the middle-to-high frequency component in the reproduction signal are obtained. While comparing the magnitudes of the two level differences obtained, the selection of an appropriate noise reduction circuitry is performed so that the two level differences are made almost equal to each other.

REFERENCES:
patent: 4242704 (1980-12-01), Ito et al.
patent: 4281295 (1981-07-01), Nishimura et al.
patent: 4427950 (1984-01-01), Akagiri et al.
patent: 4461025 (1984-07-01), Franklin
patent: 4539526 (1985-09-01), Davis
patent: 5124850 (1992-06-01), Kizu
patent: 5337368 (1994-08-01), Kikuchi et al.

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