Encoding unit and storage unit using the same
US5673243A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 11, 1996 |
| Grant date | Sep 30, 1997 |
| Priority date | — |
| Expiry date | Jan 11, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2220/20
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.