Optical information recording condition adjustment method,...

Details Optical information recording condition adjustment method,... Optical information recording condition adjustment method,...

2007-10-09

2007-10-09

Young, Wayne (Department: 2627)

Dynamic information storage or retrieval

Binary pulse train information signal

Including sampling or a/d converting

C369S059110

Reexamination Certificate

active

10500679

ABSTRACT:
The recording strategy is optimized by determining a pulse response so as to minimize the difference between the reproduced waveform obtained by recording and reproducing the recording pulse signal wherein the record data is superposed with a high-frequency pulse and the waveform calculated by convolution of the record data and pulse responses. In this process, a single recording pulse waveform is recorded on a single track of the optical recording medium for three or more times, and sampled values zp,1, . . . , zp+3,1, . . . , . . . , zp,2, . . . , zp+3,2, . . . , zp,3, . . . , zp+3,3, . . . , of the reproduced waveforms reproduced therefrom are averaged in the order of the sampling to be used as the data for the reproducing waveform. Here, the first suffix for z represents the order of the sampling, whereas the second suffix represents the number of iterated times. The use of the averaged data can remove the influence by the random noise on the reproduced waveform.

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Shoji, Mamoru, et al., “Reduction of Phase Jitter in Pulse Width Modulation recording on a Phase Change Rewritable Disk”, Shingaku Technical Report MR93-55, CPM93-107 (1993), pp. 13-18.

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