Patent · US Expired

Method and apparatus for data reproduction

US6907559B2 · kind B2 · utility

19Cited by
7References
14Claims
0Family size

Assignee

Inventors

Key dates

Filing dateDec 20, 2001
Grant dateJun 14, 2005
Priority date—
Expiry dateJun 23, 2023

Classification

  • Technology area (CPC G)Physics
  • CPC primaryG11B20/1833
  • WIPO fieldAudio-visual technology
  • WIPO sectorElectrical engineering

Abstract

DVD data is read from an optical disc. Double buffering is used for outer error correction syndromes, the syndrome for one ECC frame being accumulated in one syndrome buffer, while error correction calculations for preceding data block are performed using a syndrome accumulated previously in another syndrome buffer). The syndrome buffers are used in alternating fashion as further blocks of data are received, while the flow of data to a main buffer is uninterrupted. This reduces buffering requirements in the decoder, and relaxes time constraints on the error correction calculations. A multi-beam implementation is disclosed, providing higher throughput.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.