Recording medium, signal recording apparatus thereof, and signal

Details Recording medium, signal recording apparatus thereof, and signal Recording medium, signal recording apparatus thereof, and signal

1995-01-18

1996-12-24

Nelms, David C.

Dynamic information storage or retrieval

Storage medium structure

Optical track structure

369 47, 369 48, G11B 700

Patent

active

055879918

ABSTRACT:
A recording medium having a SYNC (synchronous code) for synchronizing with data and a DCC (DC cancel code) for suppressing a DC component of a wave form of a signal recorded on the recording medium, the SYNC and the CDD being adjacently recorded on the recording medium. Both the SYNC and DCC are patterns that are not present in a data portion. A signal recording apparatus, comprising a DSV calculating means for calculating a DSV of a signal wave form recorded on the recording medium, a cancel code generating means for generating a cancel code for suppressing a DC component of the signal wave form corresponding to the DSV calculated by the DSV calculating means, and a recording means for connecting a synchronous code and record data to the cancel code generated by the cancel code generating means and recording the cancel code, the synchronous code, and the record data on the recording medium so that the cancel code and the synchronous code are adjacently disposed, the synchronous code being adapted for synchronizing with data. A signal reproducing apparatus, comprising a reading means for reading the signal from the recording medium, and a synchronous code detecting means for detecting a predetermined pattern contained in a continuous pattern of the synchronous code and the cancel code as a significant synchronous code for synchronizing with data from the signal read by the reading means.

REFERENCES:
patent: 5200943 (1993-04-01), Sano et al.
patent: 5373479 (1994-12-01), Hanson
patent: 5446724 (1995-08-01), Tabe et al.
patent: 5469416 (1995-11-01), Yamagami et al.

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