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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: 2010-07-14
LITE ON IT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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

[0015] 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.

[0016] ...

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Abstract

The invention relates to a data reading method, which is used in a reading device. The reading device is used for reading a holographic storage medium with a plurality of data pages, each data page can form a data image with a plurality of image pixels on the sensing area of the reading device, and the sensing area is provided with a plurality of sensing pixels. The method comprises the following steps: at first, judging the relationship of relative positions of each image pixel and a sensing pixel and the optical quality of the data image with the image pixel; then, determining a corresponding decoding unit in the sensing area based on at least one of the relationship of the relative positions and the optical quality; and finally, decoding and converting each image pixel with the corresponding decoding unit.

Description

[0001] This case is a divisional application of the earlier application [0002] The application number of the earlier application is: 2007100792335 [0003] The application date is: February 13, 2007 technical field [0004] 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 [0005] The holographic storage technology mainly uses a light modulation device (Spatial Light 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 representative 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 recor...

Claims

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Application Information

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IPC IPC(8): G11B7/0065
Inventor 李岳霖张佳彦廖正尧
Owner LITE ON IT