[Paper] Efficient Decoding Method for Holographic Data Storage Combining Convolutional Neural Network and Spatially Coupled Low-Density Parity-Check Code

• Published in: ITE TRANSACTIONS ON MEDIA TECHNOLOGY AND APPLICATIONS Vol. 9; no. 3; pp. 161 - 168
• Main Authors: Katano, Yutaro, Muroi, Tetsuhiko, Kinoshita, Nobuhiro, Ishii, Norihiko, Nobukawa, Teruyoshi
• Format: Journal Article
• Language: English
• Published: The Institute of Image Information and Television Engineers 2021
• Subjects: Convolutional Neural Network; Holographic Data Storage; Spatially Coupled Low-Density Parity-Check Code
• ISSN: 2186-7364; 2186-7364
• DOI: 10.3169/mta.9.161

In this study, we propose an effective data-decoding method for holographic data storage (HDS) by combining convolutional neural network (CNN) and spatially coupled low-density parity-check (SC-LDPC) code. The trained CNN provides output class probabilities and accurately demodulates the reproduced data from HDS. We focus on these probabilities, wherein only the untrainable noise components such as white Gaussian noise remain. These are used for calculating the log likelihood ratio in the sum-product decoding for the SC-LDPC code. We demonstrate an improvement of approximately 10 dB in the required signal-to-noise ratio for an error-free decoding in numerical simulations.