Optical power calibration at the outer edge of an optical storage carrier
A CD-R/RW drive (optical storage carrier player) includes an access device for writing data on a CD (optical storage carrier). The CD includes a central portion, an inner power calibration area which can provide the optical power calibration 100 times, a data storage area for data writing by a user and a last possible lead-out area, in order from CD center to CD outer edge. The method is to define an outer power calibration area in the last possible lead-out area to perform optical power calibration in this outer power calibration area such that the total number of optical power calibrations for the CD can exceed 100.
1. An optical storage carrier player for accessing an optical storage carrier, the optical storage carrier comprising a central portion, an inner power calibration area located outside the central portion, a data storage area located outside the inner power calibration area, and an outer power calibration area located outside the data storage area, the optical storage carrier player comprising:
an access device for writing data on an optical storage carrier; and
a control apparatus for controlling the access device to perform an optical power calibration in the outer power calibration area or in the inner power calibration area to determine an optimized optical power,
wherein, according to a specific information, the control apparatus determining whether performing an optical power calibration in the outer power calibration area or performing the optical power calibration in the inner power calibration area to determine the optimized optical power, and
wherein the inner power calibration area is located close to the central portion, the inner power calibration area having a count area for recoding the specific information, and the specific information comprises a number count of the optical power calibrations already performed within the inner power calibration area.
2. The optical storagecarrier player of claim 1 wherein a last possible lead-out area is located near an outer edge of the optical storage carrier for recording ending information, and a starting point of the outer power calibration area is outside a starting point of the last possible lead-out area.
3. The optical storage carrier player of claim 2 wherein a predetermined length separation is disposed between a starting point of the outer power calibration area and a starting point of the last possible lead-out area.
4. The optical storage carrier player of claim 3 wherein the predetermined length separation corresponds to at least 1 minute period at a normal playing speed.
5. The optical storage carrier player of claim 1 wherein a length of the outer power calibration area corresponds to at least 20 second period at a normal playing speed.
6. The optical storage carrier player of claim 1 wherein the outer power calibration area further comprises a test area for allowing a test data written thereon during the power calibration and a count area for recording a number count of the power calibration already performed on the outer power calibration area.
7. A method of optical power calibration for calibrating a writing optical power of an optical storage carrier player, the optical storage carrier player comprising an access device for writing data onto an optical storage carrier, and a control apparatus for controlling the access device, the optical storage carrier comprising a central portion, an inner power calibration area located outside the central portion, a data storage area located outside the inner power calibration area, a last possible lead-out area located outside the data storage area, and an outer power calibration area, wherein a starting point of the outer power calibration area is outside a starting point of the last possible lead-out area, the method comprising the steps of:
(a) according to a specific information, the control apparatus determines whether to performing an optical power calibration in the outer power calibration area or perform the optical power calibration in the inner power calibration area to determine an optimized optical power; and
(b) writing the data onto the data storage area by the access device through applying the optimized optical power,
wherein the inner power calibration area is located close to the central portion, the inner power calibration area having a count area for recoding the specific information, and the specific information comprises a number count of the optical power calibrations already performed within the inner power calibration area.
8. The optical storage carrier player of claim 1 wherein the outer power calibration area is located within the last possible lead-out area.