Disc reproducing apparatus and method

Details Disc reproducing apparatus and method Disc reproducing apparatus and method

1997-10-24

1999-10-26

Huber, Paul W.

Dynamic information storage or retrieval

Condition indicating, monitoring, or testing

Including radiation storage or retrieval

369 47, G11B 390, G11B 509

Patent

active

059740140

ABSTRACT:
A disc reproducing apparatus comprising a means for reproducing data recorded in a disc, a means for making a decision as to whether the reproduced data are proper or not, a means for detecting a face-down state of the disc in response to the result of the decision, and a means for controlling the driving of the disc in response to the result of the detection. When a disc (DVD) loaded in a normal state is rotated clockwise, the point of reproduction is gradually shifted toward the outermost of the disc. However, when a disc loaded in a face-down state is rotated, the point of reproduction is shifted toward the innermost of the disc, so that the required continuity of addresses fails to be ensured. Thus, the face-down state of the loaded disc can be detected from the result of the decision indicating non-continuity of the addresses.

REFERENCES:
patent: 4497049 (1985-01-01), D'Alayer De Costemore D'Arc
patent: 5381392 (1995-01-01), Hira
patent: 5587982 (1996-12-01), Choi

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