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Encoding/decoding method, device and system of phase modulation type holographic storage system

A technology of holographic storage and phase modulation, applied in the field of holographic storage, can solve problems such as limited error correction ability of error correction codes and decreased data reliability, so as to increase the possibility of successful decoding, reduce the original bit error rate, and promote iteration Effect

Active Publication Date: 2021-10-19
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

[0005] Aiming at the defects and improvement needs of the prior art, the present invention provides a coding / decoding method, device and system of a phase modulation type holographic storage system, aiming to solve the problems caused by the limited error correction capability of traditional error correction codes such as LDPC. Technical issues with reduced reliability

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  • Encoding/decoding method, device and system of phase modulation type holographic storage system

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Embodiment Construction

[0043] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

[0044] In the present invention, the terms "first", "second" and the like (if any) in the present invention and drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0045] Before explaining the technical solution of the present invention in detail, the embedded data in the holographic storage system is briefly explained as fol...

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Abstract

The invention discloses a coding / decoding method, device and system of a phase modulation type holographic storage system, and belongs to the technical field of holographic storage, and the coding method comprises the following steps: during data recording, sequentially carrying out 1-N-level coding on user data, and then carrying out phase coding on the user data, all verification data and part of embedded data, wherein the first-level coding comprises the following steps: performing error correction coding on user data; and the i-level coding comprises the following steps: selecting a part of user data and a part of embedded data to form code words for error correction coding, i belongs to {2, 3,..., N}. The decoding method comprises the following steps: extracting user data, embedded data and verification data from a read data page; carrying out the 1-level decoding on the user data by using the verification data generated by the 1-level coding: if the decoding is not successful, starting the next-level decoding in sequence, obtaining part of correct user data step by step, then carrying out the 1-level decoding again, and repeating the steps until the 1-level decoding is successful. According to the invention, protection on user data can be enhanced, and data reliability is improved.

Description

technical field [0001] The invention belongs to the technical field of holographic storage, and more specifically relates to a coding / decoding method, device and system of a phase modulation type holographic storage system. Background technique [0002] Due to the advantages of large storage capacity and high data transfer rate, holographic storage has become a strong contender for the next-generation mainstream storage technology. Holographic storage is a storage technology that uses light for data access. According to different characteristic carriers carrying user information, common holographic storage technologies include amplitude modulation holographic storage and phase modulation holographic storage. Compared with amplitude modulation holographic storage, phase modulation holographic storage has higher anti-interference performance, so it has been widely used. [0003] Due to the existence of various complex noises in the environment, the reliability of phase modul...

Claims

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Application Information

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IPC IPC(8): H03M13/11G06F11/10
CPCH03M13/1105G06F11/1012
Inventor 吴非赵雅慧谢长生张猛
Owner HUAZHONG UNIV OF SCI & TECH
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