Recording medium, recording medium playback device, recording me

Details Recording medium, recording medium playback device, recording me Recording medium, recording medium playback device, recording me

1997-07-01

1999-06-29

Edun, Muhammad N.

Dynamic information storage or retrieval

Binary pulse train information signal

Binary signal gain processing

369 50, 369 58, 3692753, G11B 700

Patent

active

059177926

ABSTRACT:
An ECC encoder adds sync patterns to a preamble part and a data part in respectively different sequences. A modulator modulates data to which sync patterns have been added by the ECC encoder, and the result is recorded on an optical disk. The playback RF signal output by the optical disk is demodulated by a demodulator, and the sync patterns inserted in the signal are detected. From the combinations of detected sync patterns, the demodulator 12 identifies whether a currently reproduced frame is the preamble part or the data part, and from the identification result, playback data is sequentially stored in a predetermined area of a SRAM. It is thus performed to identify a preamble part from a reproduced RF signal, and accurately extract one block of data.

REFERENCES:
patent: 5285433 (1994-02-01), Oshiba et al.
patent: 5440474 (1995-08-01), Hetzler
patent: 5592348 (1997-01-01), Strang, Jr.
patent: 5629912 (1997-05-01), Okawa et al.

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