Hiroshi Hamasaka

Reproduction device, optical disc, recording medium, program, and reproduction method

Data recording and reproducing apparatus having a plurality of operating modes

Information recording medium and apparatus and method for recording and reproducing information

Optical disc having an area storing original and user chain information specifying at least part of a video object stored on the disc, and a computer program and recording apparatus for recording and editing the chain information

Video data editing apparatus, optical disc for use as a recording medium of a video data editing apparatus, and computer readable recording medium storing an editing program

Optical disc, video data editing apparatus, computer-readable recording medium storing an editing program, reproduction apparatus for the optical disc, and computer-readable recording medium storing an reproduction program

Information recording medium and information recording and reproducing apparatus

Method and an optical disc for generating a bitstream containing a plurality of video objects including video and audio data

Multi-layered optical disk with track and layer identification

Apparatus, method, and recording medium implementing audio gap information for an audio presentation discontinuous period