Digital signal recording/reproducing system

Details Digital signal recording/reproducing system Digital signal recording/reproducing system

1991-03-18

1993-11-30

Pascal, Robert J.

Dynamic magnetic information storage or retrieval

General processing of a digital signal

Data clocking

360 41, G11B 2730

Patent

active

052670996

ABSTRACT:
A digital signal recording/reproducing system specifically has an adaptive automatic equalizer for performing automatic waveform equalization disposed in a reproducing circuit of an RF system. In order to provide a run-up pattern which enables stable operation settlement of the adaptive automatic equalizer and a clock reproducing PLL at the time of reproduction, the digital signal recording/reproducing system comprises a run-up code generator for producing a run-up pattern composed of a combination of at least two digital value series of different inversion intervals. Thus, since an optimum run-up pattern for the reproducing circuit of the RF system is produced and recorded on a recording medium within a fixed period at the time recording, stable settlement of the operation of the clock reproducing PLL and the adaptive automatic equalizer is attained within a run-up period at the time of reproduction, thereby making it possible to suppress occurrence of a code error to a minimum.

REFERENCES:
patent: 4549227 (1985-10-01), Hashimoto et al.
patent: 4604655 (1986-08-01), Moriyama
patent: 4731678 (1988-03-01), Takeuchi
patent: 4868922 (1989-09-01), Tsuji et al.
"Design Considerations for the D-2 NTSC Composite DVTR", SMPTE Journal, Mar. 1988, pp. 182-193, Richard Brush.
"Recording and Reproducing System of DVR-10", ITEJ, Technical Report, vol. 12, No. 56, pp. 37-42, '88-61, (Dec. 1988), Isozaki et al.

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