APPARATUS AND METHOD FOR IDENTIFYING OPTICAL DISC TYPE

Abstract

A method of identifying a type of a disc includes steps of: obtaining a first address of a first position on the disc; moving a pick-up unit to a second position of the disc; obtaining a second address of the second position; calculating a difference between the first address and the second address; and identifying the type of the disc by comparing the difference with a predetermined value.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

Many aspects of the data recording and/or reproducing apparatus and method for identifying a type of a disc mounted in the data recording and/or reproducing apparatus can be better understood with reference to the following drawings. The components in the drawings are not necessarily to scale, the emphasis instead being placed upon clearly illustrating the principles of the present disc drive. Moreover, in the drawings, like reference numerals designate corresponding parts throughout the several views.

FIG. 1 is a block diagram of a data recording and/or reproducing apparatus in accordance with an exemplary embodiment;

FIG. 2 is a schematic diagram showing a disc with a small track pitch;

FIG. 3 is a schematic diagram showing a disc with a great track pitch;

FIG. 4 is a flow chart illustrating an identifying procedure of a method for identifying a type of a disc in accordance with an exemplary embodiment;

FIG. 5 is a schematic diagram showing tracks of a DVD; and

FIG. 6 is schematic diagram showing tracks of a FVD.

Claims

1. A method of identifying a type of a disc, comprising: obtaining a first address of a first position on the disc;moving a pick-up unit to a second position of the disc;obtaining a second address of the second position;calculating a difference between the first address and the second address; andidentifying the type of the disc by comparing the difference with a predetermined value.

2. The method as claimed in claim 1, wherein the step of identifying comprises a step of identifying the disc as a disc of a first type if the difference is greater than the predetermined value, and identifying the disc as a disc of a second type if the difference is less than the predetermined value, the disc of the second type has a greater track pitch than the disc of the first type.

3. The method as claimed in claim 1, wherein the step of obtaining the first address comprises steps of: emitting a light beam onto the first position of the disc;detecting a reflected light beam from the disc; andextracting the first address from the reflected light beam from the disc.

4. The method as claimed in claim 1, wherein the step of obtaining the second address comprises steps of: emitting a light beam onto the second position of the disc;detecting a reflected light beam from the disc; andextracting the second address from the reflected light beam from the disc.

5. The method as claimed in claim 1, wherein a radial distance between the first position and the second position is a predetermined distance.

6. The method as claimed in claim 5, wherein the step of moving comprises steps of: generating commands based on the predetermined distance; andsending the commands to a servo control unit to have the servo control unit instruct a driving unit to drive the pick-up unit to move along a radial direction of the disc to the second position.

7. A data recording and/or reproducing apparatus for recording data onto and/or reproduce data from a disc, comprising: a first driving unit for controlling the disc to rotate;an optical pick-up unit for emitting a light beam onto a track of the disc and detecting a reflected light beam from the disc;a second driving unit for driving the optical pick-up unit to move along a radial direction of the disc;a servo control unit for controlling the first driving unit to drive the disc to rotate and controlling the second driving unit to drive the optical pick-up unit to move; anda controller for sending commands to the servo control unit to have the servo control unit control the second driving unit to drive the optical pick-up unit to move from a first position to a second position, for extracting a first address of the first position and a second address of the second position from the reflected light beam from the disc, and for identifying a type of the disc by comparing a difference between the first address and the second address with a predetermined value.

8. The data recording and/or reproducing apparatus as claimed in claim 7, comprising a storage unit for storing a predetermined distance and the predetermined value, the predetermined distance being equal to a radial distance between the first position and the second position, the commands being generated based on the predetermined distance.

9. The data recording and/or reproducing apparatus as claimed in claim 7, wherein the controller comprises a command-sending unit for generating the commands based on the predetermined distance and for sending the commands to the servo control unit.

10. The data recording and/or reproducing apparatus as claimed in claim 7, wherein the controller comprises an address-interpreting unit for extracting the first address based on a reflected light beam from the first position and the second address based on a reflected light beam from the second position.

11. The data recording and/or reproducing apparatus as claimed in claim 7, wherein the controller comprises a disc-identifying unit for identifying the type of the disc by comparing the difference between the first address and the second address with the predetermined value.

12. The data recording and/or reproducing apparatus as claimed in claim 11, wherein the disc-identifying unit identifies the disc as a disc of a first type if the difference is greater than the predetermined value, and identifying the disc as a disc of a second type if the difference is less than the predetermined value, the disc of the second type has a greater track pitch than the disc of the first type.

13. A storage medium for storing a computer-executable program, the program having a computer executable steps of: obtaining a first address of a first position on a disc;moving a pick-up unit to a second position of the disc;obtaining a second address of the second position;calculating a difference between the first address and the second address; andidentifying the type of the disc by comparing the difference with a predetermined value.

14. The storage medium as claimed in claim 13, wherein the step of identifying comprises a step of identifying the disc as a disc of a first type if the difference is greater than the predetermined value, and identifying the disc as a disc of a second type if the difference is less than the predetermined value, the disc of the second type has a greater track pitch than the disc of the first type.

15. The storage medium as claimed in claim 13, wherein the step of obtaining the first address comprises steps of: emitting a light beam onto the first position;detecting a reflected light beam from the first position; andextracting the first address from the reflected light beam from the first position.

16. The storage medium as claimed in claim 13, wherein the step of obtaining the second address comprises steps of: emitting a light beam onto the second position;detecting a reflected light beam from the second position; andextracting the second address from the reflected light beam from the second position.