Encoding unit and storage unit using the same

Details Encoding unit and storage unit using the same Encoding unit and storage unit using the same

1996-01-11

1997-09-30

Edun, Muhammad N.

Dynamic information storage or retrieval

Binary pulse train information signal

Binary signal gain processing

369 50, 369 48, 360 48, 360 51, G11B 700

Patent

active

056732430

ABSTRACT:
An encoding unit encodes data to be recorded on a recording medium. The encoding unit includes a first part for inserting resynchronizing bytes between two data blocks within a data field when converting data coded by a predetermined modulation code which generates patterns having D.C. components into pulse width modulation data, where the resynchronizing bytes have resynchronizing patterns and achieve synchronization when a clock slip occurs within the data field, a second part for calculating a digital sum value for a predetermined data block, where the digital sum value indicates a difference between a sum total of logic values "1" and a sum total of logic values "0" in the pulse width modulation data, and a third part for controlling the first part so that the resynchronizing bytes having resynchronizing patterns that minimize the digital sum value is inserted in a present data block.

REFERENCES:
patent: 4275466 (1981-06-01), Yamamoto
"Data Interchange on 90 mm Optical Disk Cartridges", ISO/IEC JTC 1/SC 3 N 705, 1.23.06 Draft 2 Dec. 1994.

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