Patent ID: 7443770

Claim:
An apparatus for playback of a data storage compact disk of the type having a series of data streams and a TOC prerecorded in preassigned tracks thereon, each data stream being comprised of a series of frames each having a data region for storage of data and an address region for storage of the address of the frame in question in the track in question, the TOC on the disk listing the starting addresses of the data streams but not listing the ending addresses of the data streams, characterized in that the playback apparatus comprises: a transducer for reading the prerecorded data streams and TOC on the disk by relatively scanning the tracks thereon; a RAM connected to said transducer for rewritably storing the TOC read on the disk by said transducer; and data processing means connected to said RAM and said transducer for creating an expanded TOC by adding an ending address of each data stream to the original TOC which has been stored on said RAM and for controlling the scanning motion of the transducer with respect to the disk according to the expanded TOC, the expanded TOC being editable for causing said data processing means to play either whole or some desired part of any desired one of the data streams, wherein said data processing means comprises input means for inputting instructions for editing the TOC that has been stored on said RAM, ending address addition means for adding to the original TOC that has been stored on said RAM, as the ending address of each data stream, the staffing address of the next data stream, editing means for editing the expanded TOC on said RAM in response to the instructions that have been input on said input means, and control means for causing the disk to be played according to the edited TOC on said RAM.