Method and apparatus for accessing a desired track of a recording medium during a stopped state of recording or reproduction

• US 4,982,391 A
• Filed: 02/12/1988
• Issued: 01/01/1991
• Est. Priority Date: 02/20/1987
• Status: Expired due to Term

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Hosoya, Hideki, Sakagami, Wataru, Endo, Kiyonobu, Taniwa, Shigeyuki
• Primary Examiner(s): Levy, Stuart S.
• Assistant Examiner(s): Weinhardt, Robert A.
• Application Number:
  US07/155,276
• Time in Patent Office: 1,054 Days
• Field of Search: 369/30, 369/32, 369/47, 369/48, 369/54, 369/58, 369/59, 369/44, 235/454, 235/456, 235/475, 235/476
• US Class Current: 369/30.13
• CPC Class Codes: G11B 15/1875 adaptations for special effects or editing signal processing or indexing therefor G11B27/00
• CPC Class Codes: G11B 21/081 Access to indexed tracks or parts of continuous track
• CPC Class Codes: G11B 7/08505 Methods for track change, selection or preliminary positioning by moving the head

Abstract

A method and apparatus for accessing a track in a recording medium during a stopped state of recording or reproduction. The method includes accessing a recording and/or reproducing device to a desired track of a plurality of tracks on the information recording medium. The recording and/or reproducing device and the recording medium are not relatively moved in a longitudinal direction of the tracks, while the recording and/or reproducing device is moved relative to the recording medium in a direction which crosses the tracks. The apparatus for recording and/or reproducing information includes a device for recording information on and/or reproducing information from a recording medium having a plurality of parallel tracks, a first driving device for moving the recording medium relative to the recording and/or reproducing device in a longitudinal direction of the tracks, a second driving device for moving the recording and/or reproducing device relative to the recording medium in a direction crossing the tracks, and a device for controlling the first driving device for disabling the first driving device when the second driving device is operated.

Claims

1. A method of accessing a light beam to a desired track of a plurality of parallel tracks on an information recording medium for effecting at least one of recording and reproduction, said method comprising the steps of:

moving the light beam and the medium relative to each other in a longitudinal direction of the parallel tracks for effecting recording or reproduction of information;

stopping the relative movement in the longitudinal direction of the parallel tracks;

relatively moving the light beam towards a desired track in a direction crossing the parallel tracks when a predetermined time period has elapsed after the relative movement has stopped.

2. A method according to claim 1, further comprising the step of counting the number of tracks crossed by the light beam while relatively moving in the direction crossing the parallel tracks.

3. A method according to claim 2, wherein the recording medium comprises a tracking track adjacent to each of the plurality of parallel tracks for detecting a tracking signal, and further comprising the step of detecting a tracking track crossing signal for obtaining a track count.

4. A method according to claim 1, further comprising the step of attenuating vibrations caused by stopping the relative movement, during the predetermined period.

5. A method according to claim 1, wherein the recording medium comprises a card-like optical information recording medium.

6. A method of accessing recording and/or reproducing means to a desired track of a plurality of parallel tracks on an information recording medium having a no-error mark recorded in a recorded track indicating that information recorded in that track does not contain error, said method comprising the steps of:

moving said recording and/or reproducing means and the medium relative to each other in a longitudinal direction of the parallel tracks for effecting recording or reproduction of information;

stopping the relative movement in the longitudinal direction of the parallel tracks;

relatively moving said recording and/or reproducing means towards a desired track in a direction crossing the parallel tracks; and

counting the number of no-error marks crossed by said reading and/or reproducing means while relatively moving in the direction crossing the parallel tracks.

7. A method according to claim 6, wherein said medium comprises a card-like optical information recording medium.

8. A method of accessing recording and/or reproducing means to a desired track of an information recording medium including a plurality of parallel information tracks for containing information and tracking tracks for providing a tracking signal, alternately arranged, and including an error mark recorded in a recorded information track indicating that information recorded in that track contains error, said method comprising the steps of:

moving said recording and/or reproducing means and the medium relative to each other in a longitudinal direction of the parallel tracks for effecting recording or reproduction of information;

stopping the relative movement in the longitudinal direction of the parallel tracks;

relatively moving said recording and/or reproducing means towards a desired track in a direction crossing the parallel tracks; and

counting the number of tracking tracks and error marks crossed by said recording and/or reproducing means while relatively moving in the direction crossing the parallel tracks.

9. A method according to claim 8, wherein said medium comprises a card-like optical information recording medium.

10. An apparatus for optically recording and/or reproducing information comprising:

recording and/or reproducing means for recording information in and/or reproducing information from an optical recording medium comprising a plurality of parallel tracks, said recording and/or reproducing means comprising a light source for emitting a light beam for irradiating the medium;

first driving means for moving the medium and the light beam relative to each other in a longitudinal direction of the parallel tracks;

second driving means for relatively moving the light beam in a direction crossing the parallel tracks;

control means for controlling said second driving means for accessing the light beam to a track for effecting recording or reproduction, after a predetermined time period has elapsed subsequent to reduction of relative velocity between the light beam and the medium in the longitudinal direction of the parallel tracks to zero.

11. An apparatus according to claim 10, wherein the recording medium further comprises a tracking track adjacent to each of the plurality of parallel tracks for detecting a tracking signal, and said apparatus further comprises means for counting the number of tracking tracks crossed by said recording and/or reproducing means.

12. An apparatus according to claim 10, wherein the recording medium comprises a card-like optical information recording medium.

13. An apparatus according to claim 10, wherein said second driving means comprises an auto tracking actuator for driving an objective lens for condensing a light beam onto the recording medium and a kick circuit for supplying a drive pulse signal to said actuator.

14. An apparatus for recording and/or reproducing information comprising:

recording and/or reproducing means for recording information in and/or reproducing information from an information recording medium comprising a plurality of parallel tracks and a no-error mark recorded in a recorded information track indicating that information recorded in that track contains no error;

first driving means for moving the recording medium and said recording and/or reproducing means relative to each other in a longitudinal direction of the parallel tracks;

second driving means for moving said recording and/or reproducing means relative to the recording medium in a direction crossing the parallel tracks;

control means for controlling said first driving means for disabling said first driving means when said second driving means is operated; and

means for counting the number of no-error marks crossed by said recording and/or reproducing means while relatively moving in the direction crossing the parallel tracks.

15. An apparatus according to claim 14, wherein the recording medium comprises an optical information recording medium in and/or from which information is recorded and/or reproduced upon radiation of a light beam spot.

16. An apparatus according to claim 15, wherein said recording and/or reproducing means comprises an optical head comprising a light source for emitting a light beam and an optical system for focusing the light beam emitted from said light source onto the recording medium.

17. An apparatus according to claim 15, wherein the optical information recording medium comprises a card-like medium.

18. An apparatus for recording and/or reproducing information comprising:

recording and/or reproducing means for recording information in and/or reproducing information from an information recording medium comprising a plurality of parallel information tracks for containing information and tracking tracks for providing a tracking signal, alternately arranged, and further comprising an error mark recorded in a recorded information track indicating that information recorded in that track contains error;

first driving means for moving the medium and said recording and/or reproducing means relative to each other in a longitudinal direction of the parallel tracks;

second driving means for moving said recording and/or reproducing means and the medium relative to each other in a direction crossing the parallel tracks;

control means for controlling said first driving means for disabling said first driving means when said second driving means is operated; and

means for counting the number of tracking tracks and error marks crossed by said recording and/or reproducing means while relatively moving in the direction crossing the parallel tracks.