A multi-level encoded and interleaved data format for holographic data storage with high reliability and high recoverability

Siyi Wang; Qiang Cao; Changsheng Xie

doi:10.1117/12.2666750

4 April 2023 A multi-level encoded and interleaved data format for holographic data storage with high reliability and high recoverability

Siyi Wang, Qiang Cao, Changsheng Xie

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Proceedings Volume 12617, Ninth Symposium on Novel Photoelectronic Detection Technology and Applications; 126176V (2023) https://doi.org/10.1117/12.2666750
Event: 9th Symposium on Novel Photoelectronic Detection Technology and Applications (NDTA 2022), 2022, Hefei, China

Abstract

Holographic data storage (HDS) with Bragg selectivity which can store multiple holographic images in the same physical location makes the storage capacity doubled. Unfortunately, it also brings a high original bit error rate and faces continuous data errors. To solve these problems, we propose a multi-level encoded and interleaved data format for HDS. At the first level, data DSUs (minimum continuous data units) generates parity DSUs according to the coded rule (CodeRule 1), interleaves and disperses continuous DSUs in Sectors, which completes the first-level encoded and first-level interleaved. In the second-level, Sectors generate parity Sectors according to the coded rule (CodeRule 2). A fixed number of Sectors are organized into Sector-Arrays, and a fixed number of Sector-Arrays form Sector-Clusters. Consecutive Sectors are interleaved between Sector-Arrays to complete the second-level interleaved. In the third-level, the Page composed of multiple Sectors is coded. Organize a fixed number of Pages into a Page-Array, and a fixed number of Page-Arrays form Page-Clusters. Consecutive Pages are interleaved between Page-Arrays to complete the third-level interleaved (CodeRule 3). Also, we designed the user virtual address logical physical address mapping. Finally, the bit error rate of the data processed by the first-level is about 10-2 , the second-level is about 10-4, the second-level is about 10-11. The tolerance continuous error length by the first-level is 144B, the second-level is 8160B, the third-level is 137088B.

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Siyi Wang, Qiang Cao, and Changsheng Xie "A multi-level encoded and interleaved data format for holographic data storage with high reliability and high recoverability", Proc. SPIE 12617, Ninth Symposium on Novel Photoelectronic Detection Technology and Applications, 126176V (4 April 2023); https://doi.org/10.1117/12.2666750

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KEYWORDS

Data storage

Holography

Holographic data storage systems

Tolerancing

Technology

Reliability

Data modeling

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