Patent · US Active

Modified jitter criterion for optical recording media

US7940620B2 · kind B2 · utility

0Cited by

1References

9Claims

0Family size

Assignee

Thomson Licensing · FR

Inventors

Joachim Knittel · Tuttlingen, DE
Christof Ballweg · Villingen-Schwenningen, DE
Rudolf Eyberg · Villingen, DE

Key dates

Filing date	Jun 26, 2008
Grant date	May 10, 2011
Priority date	—
Expiry date	Jun 26, 2028

Classification

Technology area (CPC G)Physics
CPC primaryG11B7/1275
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

The present invention relates to a method for checking the quality of a recording on a disk intended to be read with a first wavelength and intended to be recorded with a second wavelength, directly with the second wavelength used by the recording system. According to the invention, the method uses a modified jitter definition when a jitter value of recorded information is measured using light of the first wavelength. A special equalizer takes account of a required asymmetry.

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