Method of identifying a type of an optical disc and the device therefor
AssigneeMediatek Inc.
InventorKuan-Kai Juan
Life of this patent
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Abstract
A method of identifying a type of an optical disc applied in an optical drive is provided. The optical drive at least comprises an optical pickup head. First, move the optical pickup head continually from an initial position. Then, emit a light beam on an optical disc continually and receive a reflected light beam from the optical disc to generate a servo signal. Next, detect a waveform pattern of the servo signal continually to determine whether the waveform pattern of the servo signal changes, if so, the optical disc is identified as a Digital Video Disk-Random Access Memory (DVD-RAM).
Claims20
A method of identifying a type of an optical disc applied in an optical drive, the optical drive having an optical pickup head, the method comprising:
- moving the optical pickup head continually from an initial position across an interface of an embossed area and a rewriteable area;
- emitting a light beam on an optical disc continually and receiving a reflected light beam from the optical disc to generate a servo signal;
- and
- detecting a waveform pattern of the servo signal continually to determine whether the waveform pattern of the servo signal changes, and if so, identifying the optical disc as a Digital Video Disc-Random Access Memory (DVD-RAM) disc.
An optical drive comprising:
- a servo controller operable to move an optical pickup head based on a servo signal so that the optical pickup head emits a light beam on an optical disc continually and receives a reflected light beam from the optical disc for generating the servo signal;
- and
- a signal processing unit operable to determine whether the waveform pattern of the servo signal changes based on the servo signal;
- wherein the optical pickup head continually emits the light beam to the optical disc and continually receives the reflected light beam from the optical disc to generate the servo signal when the servo controller begins to move the optical pickup head continually from a initial position to across an interface of an embossed area and a rewriteable area, and the signal processing unit continually detects the waveform pattern of the servo signal;
- wherein the signal processing unit identifies the optical disc as a DVD-RAM disc when the signal processing unit determines that the waveform pattern of the servo signal changes.
Dependencies are inferred from the claim text.