Method for recording/reproducing data on/from optical disk

Details Method for recording/reproducing data on/from optical disk Method for recording/reproducing data on/from optical disk

2005-05-17

2005-05-17

Tran, Thang V. (Department: 2653)

Dynamic information storage or retrieval

Binary pulse train information signal

Binary signal processing for controlling recording light...

Reexamination Certificate

active

06894965

ABSTRACT:
A shortest mark108is recorded with a single recording pulse. A long mark125is recorded with a two-stage pulse including a first-part pulse and a second-part pulse. In the case where each of positions115and118of front edges of the recording pulses is determined based on a relationship between a length of a space immediately before a mark and that of the mark itself so as to properly position the front edges of reproduced waveforms of all the mark lengths and each of positions of rear edges of the recording pulses of all the mark lengths is fixed so as to satisfy a prescribed relative relationship with an edge of a recording clock, power122of a recording pulse101of the shortest mark is determined so as to realize a proper rear edge position112of the reproduced waveform of the shortest mark and power124of a second-part pulse104is determined for each mark length so as to realize a proper rear edge position123of the reproduced waveform of the long mark.

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