JP2002230797A5 - - Google Patents

Claims (8)

Detecting means for irradiating a track on the disc with a beam and detecting recording information from the track ;
Moving means for moving the beam ;
The irradiation position of the beam detected based on the recorded information is compared with the target position, and the irradiation position of the beam reaches the target position, or the irradiation position of the beam is within a specific range from the target position. A search operation control means for controlling the moving means, under the condition that a predetermined number of times that it has been reached is detected as a search completion judgment condition;
A disc reproducing apparatus comprising: 2. The disc reproducing apparatus according to claim 1, wherein the specific range of the determination condition is defined by an address from the target position. 2. The disc reproducing apparatus according to claim 1, wherein the specific range of the determination condition is defined by the number of tracks from the target position. 2. The disc reproducing apparatus according to claim 1, wherein the specific range of the determination condition is defined by the number of times the track jump is executed within a specific number of tracks from the track jump destination. 2. The disk reproducing apparatus according to claim 1, wherein the determination condition is to detect direction inversion a predetermined number of times within a range of a specific number of tracks from the track jump destination. The search operation control means according to claim 2 to 5, characterized in that the irradiation position of the detected said beam and said determination condition to detect the presence of only the front or rear with respect to the target position The disc reproducing apparatus according to any one of the above. 6. The disc reproducing apparatus according to claim 2, wherein the search operation control unit makes the determination condition variable according to the type of the recorded information. The search operation control unit, the irradiation position of said detected beam, when the predetermined number of times detected that is outside the specific range in the determination condition, according to claim 1, characterized in that to stop the search operation Disc playback device.