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US 7,948,838 B2Granted
Disc discrimination method and apparatus
AssigneeLG Electronics Inc.
InventorSeung Cheol Lee
Life of this patent
Estimating the term…
Abstract
A method for discriminating a type of disc. The method includes receiving a signal having at least first and second peak points generated by an optical beam reflected from a record layer of the disc, comparing amplitudes of the first and second peak points, and determining the type of the disc based on a result of the comparing step.
Claims8
A method of discriminating a type of disc having a first record layer and a second record layer, the method comprising:
- receiving a signal having a first peak point and a second peak point, the first peak point being generated by an optical beam reflected from the first record layer and the second peak point being generated from an optical beam reflected from the second record layer;
- amplifying the signal so that one of the first and second peak points having a higher peak reaches a threshold value;
- calculating a difference in amplitude between the first and second peak points of the amplified signal;
- comparing the difference in amplitude with a predetermined reference value;
- and
- determining whether the types of the first record layer and the second record layer are the same or different from each other based on a result of the comparing step.
3 more elements
An apparatus for discriminating a type of disc having a first record layer and a second record layer, the apparatus comprising:
- a pickup unit configured to apply an optical beam to the disc;
- a signal detection unit configured to receive a signal having first peak point and a second peak point, the first peak point being generated by an optical beam reflected from the first record layer and the second peak point being generated by an optical beam reflected from the second record layer;
- an amplifying unit configured to amplifying the signal;
- and
- a control unit configured to:
- control the amplifying unit to amplify the signal so that one of the first and second peak points having a higher peak reaches a threshold value,
- calculate a difference in amplitude between the first and second peak points of the amplified signal,
- compare the difference with a predetermined reference value, and
- determine whether the types of the first record layer and the second record layer are the same or different from each other based on a result of the comparison.
6 more elements
Dependencies are inferred from the claim text.