Device for CD reproduction with variable speed or direction

Device for compensating the lack of balance of a deviating mirro

Device for deriving a sampling rate

Device for detecting position information from an optical...

Device for displacing the reading head of a video disc in radial

Device for feedback controlling focus of an optical system in an

Device for focus and alignment control in optical recording and/

Device for processing optical data with improved optical allignm

Device for scanning a radiation-reflecting information surface w

Device having a first operational state for writing...

Device that records on an optical disc and method thereof

Differential track recording

Diffraction grating using birefringence and optical head in whic

Digital audio recording medium and reproducing apparatus...

Digital audio recording medium and reproducing apparatus...

Digital audio recording medium and reproducing apparatus...

Digital automatic gain control of a multilevel optical disc...

Digital copy control method, digital recording medium,...

Digital data demodulator

Digital data modulator-demodulator