Apparatus for reproducing motion picture film photographic sound

Apparatus for reproducing recorded data

Apparatus for reproducing recorded data and selectively either o

Apparatus for reproducing recording medium with synthesis method

Apparatus for retrieving a track on a recording medium by a ligh

Apparatus for selectively recording analog and digital data on a

Apparatus for tracking a record track on a video disc

Apparatus for using window signal generators to enable detection

Apparatus for writing a data to an optical storage media and...

Apparatus for writing digital information in a disc-shaped optic

Apparatus from reproducing address data on a disk

Apparatus protecting header region of optical disc and...

Apparatus to reproduce data from a recordable information...

Appliance for recording or playing back information having...

Arced format generation method and system

Arrangements for using detected phase differences for...

Arrangements for using detected phase differences for...

Asymmetry correcting circuit and information reproducing...

Asymmetry detection apparatus, jitter detection apparatus,...

Attenuation-amount adjusting circuit, optical disk drive...