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Multi-value information recorder, method, medium and information recording-reproducing device

A technology for information recording and recording marks, applied in optical recording/reproduction/erasing methods, optical recording/reproduction, information storage, etc., can solve the problem that laser energy cannot be corrected, and it is impossible to obtain recorded multi-valued data. Problems such as the certainty of regeneration can be achieved to reduce the determination error and optimize the emission energy

Inactive Publication Date: 2003-10-08
RICOH KK
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  • Abstract
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  • Application Information

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Problems solved by technology

In some cases, the above-mentioned conventional multi-valued information recording method cannot properly correct the laser energy by simply using the difference between the recorded multi-valued data and the average value of adjacent multi-valued data
[0030] In addition, because the conventional multi-valued information recording method cannot determine whether the correction of the recording power is successful, it is impossible to obtain certainty about the proper reproduction of the recorded multi-valued data

Method used

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  • Multi-value information recorder, method, medium and information recording-reproducing device
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  • Multi-value information recorder, method, medium and information recording-reproducing device

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Embodiment Construction

[0133] Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0134] Figure 8 A block diagram of the structure of the optical disc recording-reproducing apparatus according to the first embodiment of the present invention is given.

[0135] The optical disc recording-reproducing apparatus 100 comprises a motor 1, a reproduction signal amplifier 2, a recording-reproduction signal comparator 3, a decision unit 4, a recording state table storage section 5, a modulation signal generator 6, a recording waveform generator circuit 7, a laser drive circuit 8, and photometric head 9.

[0136] When recording multi-valued data, that is, when recording marks are formed, the motor 1 rotates the optical disc 10 at a predetermined rotational speed. The modulation signal generator 6 supplies all the combinations, that is, all the multivalued data sequences as a plurality of multivalued data of the test pattern, to the recording...

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Abstract

A multi-level information recording-reproducing apparatus can accurately determine multi-level information even if recording density is increased. A multi-level information recording-reproducing apparatus radiates a laser beam to an information recording medium by switching a radiation energy level of the laser beam in a multi-level fashion and records a recorded mark in the information recording medium. The multi-level information recording-reproducing apparatus reproduces a multi-level data sequence recorded as a test pattern in the information recording medium, sets a reproduction signal level of a recorded mark based on an immediately-before cell located immediately before a cell to be reproduced, and corrects the radiation energy level of the laser beam so that the reproduction signal level can have a separate distribution from a distribution of another reproduction signal level.

Description

technical field [0001] The present invention generally relates to a multi-valued information recording device, a multi-valued information recording method, a multi-valued information recording medium for recording information on an information recording medium such as an optical disc using a multi-valued recording technique, and a A multi-valued information recording-reproducing apparatus that records and reproduces information on an information recording medium such as an optical disc by using a multi-valued recording technique, and more specifically relates to an accurate A multi-valued recording apparatus, a multi-valued information recording method, a multi-valued recording medium, and a multi-valued recording-reproducing apparatus that determine multi-valued information. Background technique [0002] The development of computer-related technology and information technology in recent years has accelerated the process of digitizing various types of information such as ima...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B7/0045G11B7/005G11B7/007G11B7/013G11B7/26
CPCG11B7/00736G11B7/005G11B7/24088G11B7/00456G11B7/261
Inventor 竹内弘司清水明彦
Owner RICOH KK
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