Digital signal reproducing apparatus for writing null data

Details Digital signal reproducing apparatus for writing null data Digital signal reproducing apparatus for writing null data

1996-12-27

1998-09-08

Psitos, Aristotelis M.

Dynamic magnetic information storage or retrieval

General processing of a digital signal

Data verification

386 75, 386104, 371 51, 371 30, G11B 509, G06F 1100, H04N 591

Patent

active

058053697

ABSTRACT:
To easily reproduce data even in variable speed reproduction mode as with normal reproduction mode. Data read from a magnetic tape 1 is supplied to a reproduction equalizing portion 4 through a reproducing amplifier 3. The reproduction equalizing portion 4 trims wave shape and supplies the resultant signal to a data determining comparator 5. The data determining comparator 5 digitizes the input signal. The digitized data is supplied to a reproduction clock extracting portion 7. The reproduction clock extracting portion 7 extracts a reproduction clock. The extracted clock is supplied to a reproduction data strobe portion 6. The reproduction data strobe portion 6 supplies the digitized data to an error correcting portion 8 in synchronization with the reproduction clock. The error correcting portion 8 generates an error correction flag, an interpolation flag, and so forth. A reproduction signal processing portion 10 and a memory 9 process signals and output a sound signal through a D/A converting portion 11.

REFERENCES:
patent: 4774605 (1988-09-01), Kato
patent: 4872171 (1989-10-01), Wakumura et al.
patent: 4928185 (1990-05-01), Kobayashi et al.
patent: 4943872 (1990-07-01), Yamazaki
patent: 5414568 (1995-05-01), Taki et al.
patent: 5548595 (1996-08-01), Hirayasu
Patent Abstracts of Japan vol. 018 No. 629 (E-1637), 30 Nov. 1994, JP-A-06 244807 (Sony Corp) 2 Sep. 1994.

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