Tatuo Sugimura

Apparatus for detecting and correcting errors on product codes

Information recording/reproducing apparatus with means for substituting predetermined good sectors for defective ones

Optical disk exclusively used for reproduction wherein guide grooves located between data managing information and data recording regions have no track address sections

Decoding method and system.

Apparatus for determining defective or non-used sectors of an optical dish

Optical disk exclusively used for reproduction

Optical information recording and reproducing apparatus having defective-sector marking means

Disque optique exclusivement de reproduction

Appareil d'enregistrement et/ou de lecture de donnees

Dekodierverfahren und vorrichtung dafuer. Decoding method and device for it.