Disc discriminating device in disc playback apparatus
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Oct 16, 2001
Grant Date -
N/A
app pub date -
Jan 20, 1999
filing date -
Jan 21, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A disc discriminating device that can be realized in a comparatively simple structure to discriminate a disc in a short time, can be obtained. A playback apparatus is set in either the DVD process mode or the CD process mode. A disc is rotated at a constant linear velocity and the rotation frequency of a disc motor is detected by a control unit. The rotation frequency obtained when a DVD is loaded is lower than that when a CD is loaded.
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