Method and a playback device for performing a track slip

• US 7,065,007 B2
• Filed: 01/18/2001
• Issued: 06/20/2006
• Est. Priority Date: 01/21/2000
• Status: Expired due to Fees

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Zimmermann, Holger, Becker, Volker, Maier, Jens, Baas, Dieter
• Primary Examiner(s): DINH, TAN X
• Application Number:
  US09/937,006
• Publication Number:
  US 20040081034A1
• Time in Patent Office: 1,979 Days
• Field of Search: 369/30.12, 369/30.11, 369/30.1, 369/30.13, 369/30.14, 369/30.15, 369/44.28, 369/44.27, 369/44.29, 720/659, 720/670
• US Class Current: 369/30.12
• CPC Class Codes: G11B 7/08505 Methods for track change, selection or preliminary positioning by moving the head
• CPC Class Codes: G11B 7/08588 with position sensing by means of an auxiliary system using an external scale

Abstract

A method for performing a track skip and a playback device for optical storage disks enable an accelerated track skip in the case of a non-moving storage disk in which a time is determined for the track skip of a read device between a current track and a selected track of a storage disk inserted in the playback device, as a function of the tracks to be skipped in this instance, and the read device is moved in the direction of the selected track for the determined time. In response to a track skip request, the read device is moved in the direction of a lead-in area of the optical storage disk until a starting position is detected. The time necessary for the track skip from starting position to the selected track is determined from this track.

Claims

1. A method for performing a track skip of a read device to a selected track of an optical storage disk inserted in a playback device, comprising the steps of:

moving the read device in a direction of a lead-in area of the optical storage disk until a predefined starting position is detected, in response to a track skip request;

determining a time required for the track skip of the read device from the starting position to the selected track, as a function of tracks to be skipped; and

moving the read device for the determined time required for the track skip in a direction of the selected track;

wherein the determined time is multiplied by an adjustable correction factor to obtain a corrected time, and the read device is moved in the direction of the selected track for the corrected time.

2. The method of claim 1, wherein, after completion of the track skip, position data read out by the read device are compared to known position data for the selected track, and the adjustable correction factor is adjusted as a function of a difference between the data read out and the known position data.

3. A playback device for optical storage disks, comprising:

a positioning device;

a read device for reading out data tracks of an optical storage disk;

a control unit to determine a time required for a track skip of the read device via the positioning device from a predefined starting position of a lead-in area of the optical storage disk to a selected track as a function of tracks to be skipped; and

a switch situated in a vicinity of the starting position of the lead-in area of the optical storage disk;

wherein;

in response to a track skip request, the positioning device moves the read device in a direction of the lead-in area until the switch is operated, and the positioning device moves the read device for the determined time required for the track skip in a direction of the selected track.

4. The playback device of claim 3, wherein the control unit multiplies the determined time by an adjustable correction factor to provide a corrected time, and the positioning device moves the read device in a direction of the selected track for the corrected time.

5. The playback device of claim 4, wherein, after the completion of the track skip, the control unit compares position data read out by the read device to known position data for the selected track, and the control unit adjusts the adjustable correction factor as a function of a difference between read-out position data and the known position data.