Cross-talk cancellation scheme for rll-based storage systems

a storage system and cross-talk technology, applied in power management, instruments, data recording, etc., can solve the problems of system blockage, inability to communicate with each other,
US20060181975A1Inactive Publication Date: 2006-08-17KONINKLIJKE PHILIPS ELECTRONICS NV
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
KONINKLIJKE PHILIPS ELECTRONICS NV
Publication Date
2006-08-17
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to Run length Limited-codes storage systems. In modern storage systems, the inter-track spacing is chosen to be relatively small to allow for high storage densities. As a result, when reading a target track, data written on side tracks may appear in the recovered signal. This inter-track interference is called cross-talk. The invention proposes a cross-talk cancellation scheme based on the minimization of the mismatch between the actual (dm+1m) and the expected (exp) run length between two transitions (xm, xm+1) of the (dm+1,m) signal. The proposed solution significantly improves the ramp-up properties of the receiver and allows more efficient hardware implementation.
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Description

FIELD OF THE INVENTION

[0001] The present invention relates to a cross-talk cancellation method, a computer program for implementing a cross-talk cancellation method, a signal processor comprising cross-talk cancellation means, and an apparatus for reading a signal stored along a track on a storage medium, said apparatus comprising cross-talk cancellation means.

[0002] The present invention relates to storage systems in which data are stored along tracks on a storage medium. In modern storage systems, the inter-track spacing is chosen relatively small to allow for high storage densities. As a result, when reading a target track, data written on side tracks may appear in the recovered signal. This inter-track interference is called cross-talk.

[0003] The invention is advantageously used in such storage systems to improve the recovered signal by removing the cross-talk. For example, the invention applies to optical storage systems (DVD, Blu-ray Disc, Small Form Factor Optical Disc . ....

Claims

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