Magnetic-tape recording/reproducing arrangement comprising a cod

Details Magnetic-tape recording/reproducing arrangement comprising a cod Magnetic-tape recording/reproducing arrangement comprising a cod

1997-04-17

1999-01-05

Hoff, Marc S.

Coded data generation or conversion

Digital code to digital code converters

With error detection or correction

360 7713, H03M 1300

Patent

active

058567984

ABSTRACT:
A magnetic-tape recording/reproducing arrangement of the "helical scan" type adapted to record and/or reproduce a digitally coded video signal, includes a coding device (3). In the recording mode, the coding device (3) performs channel-encoding upon a digital recording signal (C) so as to form a channel signal (D) for recording on the magnetic tape (7.1). In the reproduction mode, the coding device (3) performs channel-decoding upon the channel signal (H) read from the magnetic tape (7.1), so that a digital reproduction signal is formed which is a replica of the original recording signal (C). For this purpose, the coding device (3) includes a data sequence generator (3.3) adapted to generate a data sequence (E) defined by the polynomial P(X)=X.sup.15 +X.sup.A +1, where A=7 or 8. Furthermore, the coding device (3) may include an XOR circuit (3.2) in which the signal (C, H) to be processed is combined with the generated data sequence (E), and a selection circuit (3.1) for selecting the signal to be processed (C, H) from the recording signal (C) and the channel signal (H), in dependence upon the mode of operation of the recording/reproducing arrangement.

REFERENCES:
patent: 4752832 (1988-06-01), Higurashi
patent: 5161171 (1992-11-01), Suzuki et al.
patent: 5438458 (1995-08-01), Honjo
patent: 5546247 (1996-08-01), Fujioka et al.
patent: 5724034 (1998-03-01), Nielander et al.

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