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Experiments of Multi-Level Read-Only Recording Using Readout Signal Wave-Shape Modulation |
| TANG Yi;PEI Jing;PAN Long-Fa;NI Yi;HU Hua; ZHANG Bu-Qing |
| Optical Memory National Engineering Research Center, Department of Precision Instrument, Tsinghua University, Beijing 100084 |
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| Cite this article: |
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TANG Yi, PEI Jing, PAN Long-Fa et al 2008 Chin. Phys. Lett. 25 1709-1712 |
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Abstract An innovative multilevel read-only recording method is proposed. In this method, a short pit/land is deliberately inserted to the original land/pit. This modifies the wave-shape of readout signal. Taking the wave-shape as the symbol of level detection, a signal wave-shape modulation (SWSM) multilevel method is realized. This method is carried out and validated on the DVD read-only manufacture and readout system. A capacity of 15GB can be expected, and a bit error rate of 10-4 is achieved. The capacity can meet the demand of high definition movie publication. This method also provides a potential multi-level solution for other storage formats and systems.
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| Keywords:
42.79.Vb
42.60.Fc
47.55.Kf
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Received: 20 December 2007
Published: 29 April 2008
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| PACS: |
42.79.Vb
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(Optical storage systems, optical disks)
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42.60.Fc
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(Modulation, tuning, and mode locking)
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47.55.Kf
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(Particle-laden flows)
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