Apparatus and method for providing uninterrupted continuous play during a change of sides of a dual-sided optical disk

• US 7,149,158 B2
• Filed: 08/01/2005
• Issued: 12/12/2006
• Est. Priority Date: 10/20/1998
• Status: Expired due to Term

• Current Assignee: Micron Technology, Inc.
• Original Assignee: Micron Technology, Inc.
• Inventors: Revis, Paul A.
• Primary Examiner(s): PSITOS, ARISTOTELIS
• Application Number:
  US11/195,420
• Publication Number:
  US 20050265186A1
• Time in Patent Office: 498 Days
• Field of Search: 369/30.23, 369/30.27, 369/30.11
• US Class Current: 369/30.23
• CPC Class Codes: G11B 19/04 Arrangements for preventing, inhibiting, or warning against double recording on the same blank or against other recording or reproducing malfunctions
• CPC Class Codes: G11B 19/127 involving detection of the number of sides, e.g. single or double, or layers, e.g. for multiple recording or reproducing layers
• CPC Class Codes: G11B 20/10 Digital recording or reproducing
• CPC Class Codes: G11B 2007/0013 for carriers having multiple discrete layers
• CPC Class Codes: G11B 2020/1062 Data buffering arrangements, e.g. recording or playback buffers
• CPC Class Codes: G11B 2220/213 Read-only discs
• CPC Class Codes: G11B 2220/2545 CDs
• CPC Class Codes: G11B 2220/2562 DVDs [digital versatile discs]; Digital video discs; MMCDs; HDCDs
• CPC Class Codes: G11B 27/105 of operating discs
• CPC Class Codes: G11B 7/0037 with discs
• CPC Class Codes: G11B 7/005 Reproducing G11B7/0065 takes precedence
• CPC Class Codes: G11B 7/08594 to access both sides of the disc with the same head assembly
• CPC Class Codes: G11B 7/24038 Multiple laminated recording layers

Abstract

An apparatus and method for providing continuous uninterrupted playback of a dual sided optical disk during side-to-side changing of the optical disk. The point at which a dual-sided optical disk will be switched between sides is determined. At some point prior to the switching of sides of the disk, a portion of the data at the end of the first side of the disk is transferred to a memory. During the switching of the disk to the second side, the stored data is read out from the memory to provide uninterrupted continuous playback of the optical disk.

Claims

1. An apparatus for reading a first side and a second side of a dual-sided optical disk, the apparatus comprising:

an optical disk reader;

a memory operably coupled to the optical disk reader; and

a controller operably coupled to the optical disk reader and the memory, wherein the controller is configured to cause a portion of data from the first side of the optical disk to be (a) read from the optical disk, (b) stored in the memory, and (c) later read from the memory during a time when reading the optical disk is switched from the first side to the second side.

2. The apparatus of claim 1 wherein the controller is configured to determine a point on the first side of the optical disk when reading the optical disk should be switched from the first side to the second side.

3. The apparatus of claim 2 wherein the portion of data stored in the memory comprises data from the determined point on the first side of the optical disk up to an end of the first side of the optical disk.

4. The apparatus of claim 1, further comprising a transfer mechanism positioned to flip the optical disk from the first side to the second side.

5. The apparatus of claim 1 wherein the optical disk reader rotates about an axis.

6. The apparatus of claim 1 wherein the optical disk reader further comprises an optical pickup adapted to move from the first side of the optical disk to the second side of the optical disk to switch reading from the first side to the second side.

7. The apparatus of claim 1 wherein the optical disk reader further comprises:

a first optical pickup configured to read data from the first side of the optical disk; and

a second optical pickup configured to read data from the second side of the optical disk.

8. The apparatus of claim 1, further comprising an output device operably coupled to the controller to output the data read from the optical disk.

9. An apparatus for reading a first and second side of a dual-sided optical disk, the apparatus comprising:

an optical disk reader configured to read the first side of the optical disk while rotating the optical disk in a first direction around an axis and read the second side of the optical disk while rotating the optical disk in a second direction around the axis;

a memory operably coupled to the optical disk reader; and

a controller operably coupled to the optical disk reader and the memory, wherein the controller is configured to cause a portion of data from the first side of the optical disk to be (a) read from the optical disk, (b) stored in the memory, and (c) later read from the memory during a time when reading the optical disk is switched from the first side to the second side.

10. The apparatus of claim 9 wherein the optical disk reader further comprises an optical pickup configured to move from the first side of the optical disk to the second side of the optical disk to switch reading from the first side to the second side.

11. The apparatus of claim 9 wherein the optical disk reader further comprises:

a first optical pickup configured to read data from the first side of the optical disk; and

a second optical pickup configured to read data from the second side of the optical disk.

12. An optical disk device for providing continuous, uninterrupted playback of a dual-sided optical disk, the optical disk device comprising:

an optical reader configured to read the dual-sided optical disk;

a memory adapted to store data transferred from the dual-sided optical disk; and

a controller configured to determine a portion of data on the first side of the optical disk to be transferred to the memory,

wherein the optical reader is configured to read data on the first side of the optical disk up to the portion of data transferred to the memory, the portion of the data transferred to the memory is read while the second side of the optical disk is accessed, and the second side of the optical disk is read after the portion of the data transferred to the memory has been read.

13. The optical disk device of claim 12 wherein the optical reader is rotatable to allow access to the second side of the optical disk.

14. The optical disk device of claim 12, further comprising a transfer mechanism positioned to flip the optical disk from the first side to the second side to enable the optical reader to read data from both sides of the disk.

15. A system for playing an optical disk, the system comprising:

a processor;

a memory connected to the processor;

an output device; and

an optical disk device including an optical reader adapted to read a dual-sided optical disk,

wherein the processor is configured to cause a portion of data from a first side of the optical disk to be read from the optical disk and stored in the memory and later read from the memory during a time when reading the optical disk is switched from the first side to a second side.

16. The system of claim 15 wherein the processor is configured to determine a point on the first side of the optical disk when reading the dual-sided optical disk should be switched from the first side to the second side.

17. The system of claim 16 wherein the portion of data stored in the memory comprises data from the determined point on the first side of the optical disk up to an end of the first side of the optical disk.

18. The system of claim 17 wherein an amount of time required to read the portion of data stored in the memory corresponds to an amount of time required to switch reading of the optical disk from the first side to the second side.