Dynamic information storage or retrieval – Binary pulse train information signal – Binary signal processing for controlling recording light...
Reexamination Certificate
2006-08-08
2006-08-08
Young, Wayne (Department: 2656)
Dynamic information storage or retrieval
Binary pulse train information signal
Binary signal processing for controlling recording light...
C369S116000
Reexamination Certificate
active
07088663
ABSTRACT:
The apparatus records information by irradiating a laser beam onto a recording medium and forming marks on the disc. Prior to the actual recording, the controller performs a test recording in which predetermined test recording data is recorded on the recording medium. In the test, data is recorded by generating a recording pulse signal based on the recording data and thereby driving a light source. While the test recording is performed, the level of a cooling pulse in the recording pulse signal is varied. Then, the test recorded data is reproduced to generate a reproduced signal. A waveform of the reproduced signal is evaluated, and a cooling level that provides a target asymmetry value is set as an optimum cooling level. Thus, the subsequent actual recording can be performed according to the optimum cooling level determined based on characteristics of the recording medium to be used for the actual recording.
REFERENCES:
patent: 4939717 (1990-07-01), Ohno et al.
patent: 6256277 (2001-07-01), Saga et al.
patent: 6343056 (2002-01-01), Miyamoto et al.
patent: 0 978 827 (2000-02-01), None
patent: 1 026 671 (2000-08-01), None
Adachi Masatoshi
Sasaki Yoshio
Tominaga Yasuhiko
Uchino Hiroyuki
Pham Van T.
Pioneer Corporation
Young Wayne
Young & Thompson
LandOfFree
Information recording apparatus and information recording... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Information recording apparatus and information recording..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Information recording apparatus and information recording... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3693221