Recording/playback device, recording device, and recording/playback method

Abstract

A recording/playback device includes an information conversion unit converting video or audio information, received from an external source, to video or audio data for recording on a rewritable optical disk, a recording unit recording the video or audio data on said optical disk, and a playback unit playing back the video or audio data recorded on said optical disk, in which the optical disk has at least two recording layers and, when the video or audio data is recorded in two or more layers of the optical disk and then a part of the video data or audio data recorded in each layer is erased, a part of the video or audio data left unerased is moved so that a number of layers, in which the video or audio data left unerased is recorded, is reduced.

1 . A recording/playback device comprising:
 information a conversion unit converting video or audio information, received from an external source, to video or audio data for recording on a rewritable optical disk;   a recording unit recording the video or audio data on said optical disk; and   a playback unit playing back the video or audio data recorded on said optical disk,   wherein said optical disk has at least two recording layers and, when the video or audio data is recorded in two or more layers of said optical disk and then a part of the video data or audio data recorded in each layer is erased, a part of the video or audio data left unerased is moved so that a number of layers, in which the video or audio data left unerased is recorded, is reduced.   
   
   
       2 - 12 . (canceled)