Apparatus for detecting a synchronization signal in a digital data record/replay device
US6377643B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 8, 1999 |
| Grant date | Apr 23, 2002 |
| Priority date | — |
| Expiry date | Jan 8, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L7/042
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An apparatus for detecting a sync signal in a digital data record/replay device having a parallel clock generator, a parallel data generator, and a window unit comprises: a sync signal detector for comparing a pattern matching sync signal output from a sync pattern detector with an output signal of the window unit and detecting a sync signal according to clocks of the parallel clock generator; a latch unit for latching the sync signal detected by the sync signal detector and outputting the sync signal as a sync position signal according to clocks of the parallel clock generator; an identification error correction code (ID ECC) controller for generating an ID ECC control signal according to the sync position signal of the latch unit; an ID ECC decoder for decoding ID areas of parallel data generated by the parallel data generator; and a sync signal checking unit for outputting the sync position signal of the latch unit as a final sync signal and, when errors are detected as a result of the ID ECC decoding, sending a control signal to the window unit. The present invention can check sync signals using the ID ECC and restore normal sync signals when an initial sync signal is erroneous…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.