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Data reading method

A technology of data and reading devices, applied in the direction of optical recording/reproducing/erasing methods, recording/reproducing/erasing using optical interference patterns, etc., which can solve problems such as decoding speed reduction

Inactive Publication Date: 2008-08-20
LITE ON IT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally speaking, the larger the decoding unit range, the higher the accuracy of the decoding restoration operation, but there is also the concern that the decoding speed will decrease relatively.

Method used

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Embodiment Construction

[0012] Certain terms are used in the specification and subsequent claims to refer to particular elements. It should be understood by those skilled in the art that hardware manufacturers may use different terms to refer to the same element. This description and subsequent patent applications do not use the difference in name as a way to distinguish components, but use the difference in function of components as a criterion for distinguishing. The "comprising" mentioned throughout the specification and subsequent claims is an open term, so it should be interpreted as "including but not limited to". In addition, the term "coupled" here includes any direct and indirect means of electrical connection. Therefore, if it is described that a first device is coupled to a second device, it means that the first device may be directly electrically connected to the second device, or indirectly electrically connected to the second device through other devices or connection means.

[0013] ...

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Abstract

The present invention provides a data reading method, for a reader. The reader is used for hologram storage medium having multiple data pages, each data page is used for sensing region of the reader to form data image having multiple image pixels. The sensing region has multiple sensing pixels. The reader includes following steps: firstly, judging the relative relationship betweent each image pixel and these sensing pixels and judging the optical quality of the data image of each image pixel, then, determining a corresponding code unit on the sensing region according to at least one of the relative relationship and the optical quality; finally, processing conversion action of the each image pixel according to the corresponding code unit.

Description

technical field [0001] The present invention relates to the technical field of holographic storage, and in particular relates to a data reading method which can properly adjust the size of a decoding unit. Background technique [0002] The holographic storage technology mainly uses a light modulation device (SpatialLight Modulator, SLM) to translate and encode digital data into a signal light composed of bright and dark points arranged in a two-dimensional distribution, and then form a signal light representing the original data with a reference light. The interference pattern (that is, the hologram, or a data page) is recorded in a storage medium such as an optical disc. In addition, multiple data pages can be tightly stacked and recorded in the storage medium by various multiple recording methods (such as angle multiplexing, wavelength multiplexing, phase multiplexing, transfer multiplexing, and peripheral melody multiplexing, etc.). within the same area (data area). Whe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B7/0065
CPCG11B7/0065
Inventor 李岳霖张佳彦廖正尧
Owner LITE ON IT