CD player capable of playing back partially recorded CD

Details CD player capable of playing back partially recorded CD CD player capable of playing back partially recorded CD

1993-01-22

1995-11-28

Neyzari, Ali

Dynamic information storage or retrieval

Information location or remote operator actuated control

Selective addressing of storage medium

369 47, 369 58, G11B 1722

Patent

active

054714419

ABSTRACT:
A CD player capable of detecting the recording end of a partially recorded CD-R (PRD) during playback. When an unrecorded area (URA) is detected, an address immediately before that of the URA is held and a setup is performed at the position of that detection. If the setup is unsuccessful, a setup is performed at a reference setup position, and when this setup operation is complete, playback starts from the held address position. When the playback from the position and detection of the URA are repeated a predetermined number of times, the held address position is discriminated as the recording end. According to a method of searching for the last piece of recorded information in the program area on a PRD, when reading failure occurs in a search, the pickup is moved back to a previous jump position to the occurrence of the reading failure. Then a search is conducted through a jump over tracks equal to or less in number than the number of tracks of a predetermined smallest amount of information from that jump position, and the last piece (e.g., song) is detected by a sub code acquired at a jump position immediately previous to the re-occurrence of reading failure. A CD player capable of ensuring reproduction of all the pieces of recorded information during playback of a PRD updates the last track number to the newly detected track number when detecting a next track number in an area following an area of a memorized last track number during playback of a PRD.

REFERENCES:
patent: 5153861 (1992-10-01), Maeda et al.
patent: 5177728 (1993-01-01), Otsubo et al.
patent: 5228021 (1993-07-01), Sato et al.
patent: 5414684 (1995-05-01), Nonaka et al.

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