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1. IN0309/CHENP/2006 - RECORDCARRIER,DEVICE AND METHOD FOR CORRECTING SIGNED DEVIATION

Office
India
Application Number 0309/CHENP/2006
Application Date 25.01.2006
Publication Number 0309/CHENP/2006
Publication Date 17.07.2009
Publication Kind A
IPC
I
Applicants
Title
(EN) RECORDCARRIER,DEVICE AND METHOD FOR CORRECTING SIGNED DEVIATION
Abstract
(EN) ABSTRACT:A device for recording information in a track on a record carrier writes and reads marks and spaces each having a nominal run length. The device has a detection unit (32) for generating a signed deviation value signal (34) indicative for a position deviation of a starting edge of a mark and/or an ending edge of a mark with respect to a nominal position of said edge. A calculation unit (31) selects at least one predefined run length pattern and determines a correction signal (33) based on at least one statistically calculated parameter of the signed deviation value signal for the selected run length pattern. A radiation source control unit (29) controls the power of the radiation source during said writing based on the correction signal.