METHODS FOR DETECTING SERVO ERROR, DRIVE ERROR, INCLINE ERROR AND METHODS FOR RECORDING DATA ON DISK AND REPRODUCTION OF DATA FROM OPTICAL DISK Russian patent published in 2005 - IPC

FIELD: optical data carriers.

SUBSTANCE: from optical disk, on which standard samples of similar length are recorded in a way to deviate from middle of track in opposite directions, signals are reproduced, which are detected from standard samples. On basis of determined values of detected signals value of balance value is determined, on basis of which servo error is detected. As standard samples, "vfo" template signals recorded on disk can be used. Values of balanced values, received for adjoining sectors, can be brought to average. Balance value for detection of incline error can be determined on basis of subtraction signal RF_pp, which is signal of subtraction V2-V1, where V1, V2 - signals from radial couples of photo-detector.

EFFECT: more stable servo control, maintained optimal state for recording and reproduction.

11 cl, 15 dwg