Apparatus and method for detecting a position of a pickup
AssigneeSamsung Electronics Co., Ltd.
InventorSeung-hoon Kim
Life of this patent
Estimating the term…
Abstract
An apparatus and method thereof detect a location of a pickup in an optical disc. A pickup reads and writes a signal from or to the optical disc. A spindle motor rotates the optical disc. A controller measures a rotational speed of the spindle motor to detect a current location of the pickup in the optical disc, wherein the pickup is determined to be located in an area of more than 90 minutes of the optical disc based on ATIP information recorded on the optical disc.
Claims15
An apparatus to detect a location of a pickup in an optical disc, comprising:
- a pickup reading or writing a signal from or to the optical disc;
- a spindle motor rotating the optical disc;
- and
- a controller determining whether the pickup is located in area of more than 90 minutes of the optical disc, and measuring a rotational speed of the spindle motor to detect a current location of the pickup in the optical disc, wherein the pickup is determined to be located in area of more than 90 minutes of the optical disc based on an absolute time-code in pre-groove (ATIP) information recorded on the optical disc, read by the pickup, and provided to the controller.
A method to detect a location of a pickup in an optical disc, wherein the optical disc is rotated using a spindle motor, the method comprising:
- determining whether the pickup is present in area of more than 90 minutes of the optical disc from an absolute time-code in pre-groove (ATIP) information recorded on the disc;
- measuring a rotational speed of the spindle motor at the current location of the pickup when the pickup is determined to be present in area of more than 90 minutes of the optical disc from ATIP information;
- determining that the pickup is present in a lead-in area when the rotational speed of the spindle motor is faster than a reference rotational speed in an inner area of the optical disc;
- and
- determining that the pickup is present in an area other than the lead-in area when the rotational speed of the spindle motor is slower than the reference rotational speed at an outer area of the optical disc.
A method to detect a location of a pickup for an optical disc, which has a lead-in area, a program area, and a lead-out area and which is rotated using a spindle motor, the method comprising:
- recording a signal on the disc;
- detecting a current position of the pickup using rotational speeds of the disc at a wobble speed factor when recording the signal on the disc, wherein the optical disc stores data in area of more than 90 minutes;
- and
- repeatedly recording location information in different areas of the optical disc.
Dependencies are inferred from the claim text.