Experiments of Multi-Level Read-Only Recording Using Readout Signal Wave-Shape Modulation |
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| Authors: | TANG Yi PEI Jing PAN Long-Fa NI Yi HU Hua ZHANG Bu-Qing |
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| Affiliation: | Optical Memory National Engineering Research Center, Department of Precision Instrument, Tsinghua University, Beijing 100084 |
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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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