High Density Optical Disk System Using Two-Dimensional Recording
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概要
- 論文の詳細を見る
A two-dimensional recording method that achieves double recording density by reducing the track pitch is described. This method uses a flat disk and the data are recorded with circular marks on lattice points. Two-dimensional interference consisting of crosstalk and inter-symbol interference is reduced by two-dimensional equalization. To minimize the two-dimensional interference, the optimum equalization coefficients are calculated dynamically with the reproduced signal of the training marks. Reproduction was simulated and this showed that the signal-to-noise ratio of the processed signal was 24.3 dB under ideal conditions and 19.8 dB under worst-case conditions with the usual magneto-optical media using double recording density. These simulation results were checked by a recording/reproduction experiment. The experimental result for the signal-to-noise ratio of the processed signal was 23.6 dB with an areal density of 2.3 Gbit/in^2.
- 社団法人電子情報通信学会の論文
- 1995-11-25
著者
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Sugiyama H
Data Storage Amp Retrieval Systems Division Hitachi Ltd.
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Wakabayashi Koichiro
Central Research Laboratory, Hitachi Ltd.
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Sugiyama Hisataka
Data Storage amp Retrieval Systems Division, Hitachi Ltd.
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Saito Atsushi
Data Storage amp Retrieval Systems Division, Hitachi Ltd.
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Maeda Takeshi
Data Storage amp Retrieval Systems Division, Hitachi Ltd.
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Wakabayashi Koichiro
Central Research Laboratory Hitachi Ltd.
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Maeda Takeshi
Data Storage Amp Retrieval Systems Division Hitachi Ltd.
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Saito Atsushi
Data Storage Amp Retrieval Systems Division Hitachi Ltd.
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