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8184517 |
Optical recording medium, information recording method, and information reproducing method
According to one embodiment, an optical recording medium is provided in which interlayer crosstalk is low and in which stable and high-quality recording characteristics can be obtained. To this...
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8179757 |
Method and apparatus for recording and reproducing information on and from optical disc
An apparatus for recording and reproducing an information signal on and from an optical disc includes a memory. The information signal is written into the memory. The information signal is read out...
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8179764 |
Optical recording medium, information recording method, and information reproducing method
According to one embodiment, an optical recording medium is provided in which interlayer crosstalk is low and in which stable and high-quality recording characteristics can be obtained. To this...
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8179765 |
Optical recording medium, information recording method, and information reproducing method
According to one embodiment, an optical recording medium is provided in which interlayer crosstalk is low and in which stable and high-quality recording characteristics can be obtained. To this...
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8174948 |
Optical recording medium, information recording method, and information reproducing method
According to one embodiment, an optical recording medium is provided in which interlayer crosstalk is low and in which stable and high-quality recording characteristics can be obtained. To this...
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8169866 |
Reproducing power adjusting method, optical information recording/reproducing apparatus and information recording media
By referring to a table of reproducing conditions and medium specific parameters, stored in an optical disc or optical disc apparatus and/or generated by the optical disc apparatus, the medium...
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8169874 |
Optical recording medium, information recording method, and information reproducing method
According to one embodiment, an optical recording medium is provided in which interlayer crosstalk is low and in which stable and high-quality recording characteristics can be obtained. To this...
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8169870 |
Recording/reproducing device and method using pulse sequences, and information recording medium
A recording/reproducing device includes a laser and a laser drive carried by a pickup having a drive for movement. A control controls the drives to irradiate the recording medium with laser pulse...
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8169872 |
Optical recording medium, information recording method, and information reproducing method
According to one embodiment, an optical recording medium is provided in which interlayer crosstalk is low and in which stable and high-quality recording characteristics can be obtained. To this...
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8169873 |
Optical recording medium, information recording method, and information reproducing method
According to one embodiment, an optical recording medium is provided in which interlayer crosstalk is low and in which stable and high-quality recording characteristics can be obtained. To this...
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8165000 |
Optical recording medium, information recording method, and information reproducing method
According to one embodiment, an optical recording medium is provided in which interlayer crosstalk is low and in which stable and high-quality recording characteristics can be obtained. To this...
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8165001 |
Optical recording medium, information recording method, and information reproducing method
According to one embodiment, an optical recording medium is provided in which interlayer crosstalk is low and in which stable and high-quality recording characteristics can be obtained. To this...
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8159911 |
Recording device, recording method, disc manufacturing method and optical disc recording medium
An optical disc recording medium is irradiated with laser light having a predetermined laser power to deform an irradiated portion of a substrate into a protruding portion. Since the substrate is...
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8159921 |
Optical recording medium, information recording method, and information reproducing method
According to one embodiment, an optical recording medium is provided in which interlayer crosstalk is low and in which stable and high-quality recording characteristics can be obtained. To this...
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8159920 |
Optical recording medium, information recording method, and information reproducing method
According to one embodiment, an optical recording medium is provided in which interlayer crosstalk is low and in which stable and high-quality recording characteristics can be obtained. To this...
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8159912 |
Recording parameter setting device, program thereof, computer-readable recording medium containing the program, information recording medium, recording/reproducing device, and recording parameter setting method
A recording parameter setting device including a trial recording parameter setting section and a reproduced signal quality judging section. The reproduced signal quality judging section judges...
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8154965 |
Method and device for retrieving information from an optical record carrier at various reading speeds
The present invention is related to a method and a reading device (1) for retrieving information from an optical record carrier (10) in which the read power level of a radiation beam (3) for...
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8154970 |
Optical recording medium, information recording method, and information reproducing method
According to one embodiment, an optical recording medium is provided in which interlayer crosstalk is low and in which stable and high-quality recording characteristics can be obtained. To this...
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8154971 |
Optical recording medium, information recording method, and information reproducing method
According to one embodiment, an optical recording medium is provided in which interlayer crosstalk is low and in which stable and high-quality recording characteristics can be obtained. To this...
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8149674 |
Optical recording medium, information recording method, and information reproducing method
According to one embodiment, an optical recording medium is provided in which interlayer crosstalk is low and in which stable and high-quality recording characteristics can be obtained. To this...
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8149672 |
Optical recording medium, information recording method, and information reproducing method
According to one embodiment, an optical recording medium is provided in which interlayer crosstalk is low and in which stable and high-quality recording characteristics can be obtained. To this...
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8149661 |
Short-pulse light source, laser light emission method, optical device, optical disc device, and optical pickup
Directed to freely adjusting an emission period of a semiconductor laser. In the present invention, pulsed light serving as pulse-shaped laser light (LL) is emitted from a semiconductor laser (3),...
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8144569 |
Multi-layer optical disc, and recording method and apparatus for multi-layer optical disc
Each layer includes a data recording area and a test writing area divided into a plurality of small areas, wherein the small areas of the test writing area are recorded in advance so that other...
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8139454 |
Recording and reproducing apparatus and method
A Spare Area kept unused on a disk is available for use other than spare processing, or Defect Management process, and compatibility of the disk is at least secured between different recording...
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8139459 |
Optical recording medium, information recording method, and information reproducing method
According to one embodiment, an optical recording medium is provided in which interlayer crosstalk is low and in which stable and high-quality recording characteristics can be obtained. To this...
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RE43237 |
System for constant angular velocity disk recording and method for laser power control thereof
The system and method is used for CAV (Constant Angular Velocity) control format recording, whereas the existing disk data is recorded under CLV (Constant Linear Velocity) control format recording....
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8134899 |
Optical recording medium, information recording method, and information reproducing method
According to one embodiment, an optical recording medium is provided in which interlayer crosstalk is low and in which stable and high-quality recording characteristics can be obtained. To this...
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8134897 |
Current gain control system
A current gain control system is described and comprises first and second gain blocks respectively associated with the first and second input channels, wherein first and second gain blocks transmit...
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8130610 |
Optical disc recording method and optical disc recorder
To compensate for edge shifts varying largely in accordance with preceding mark lengths. Provided are a method and a recorder in which a duration of a cooling pulse in each recording pulse string...
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8130609 |
System and method of bias control
A system and method of laser bias control in optical recording media applications are disclosed. In some implementations, bias control for output power may be based upon a detected ratio of erase...
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8121014 |
Method and apparatus for determining the reading power of an optical reproducing device
Since the conventional optical disk recording/reproducing apparatus cannot correctly measure a power of a main beam that is a part of the laser light outputted from an objective lens and is focused...
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8116180 |
Optical disc recording device and recording method thereof
An optical disc recording device according to the present invention is capable of quickly performing the OPC operation for a rewritable optical disc, and is also capable of setting the proper...
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8111603 |
Optical disk apparatus and its reproducing method
Amplitude and frequency of a high-frequency signal superposed on a reproduction laser beam are changed in accordance with a reproduction spot diameter on the surface of the recording layer upon...
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8111599 |
Optical disc drive apparatus and optical disc reproduction method using the same
An optical disc drive apparatus (100) of the present invention rotates an optical disc (1) at a predetermined rotation speed using a motor (2). An optical pickup (3) irradiates the optical disc (1)...
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8107335 |
Method and apparatus for recording and reproducing information on and from optical disc
An apparatus for recording and reproducing an information signal on and from an optical disc includes a memory. The information signal is written into the memory. The information signal is read out...
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8107334 |
Laser power control method and optical information recording/reproducing device
Control powers of a first definition group corresponding to pulse trains to form recording marks, and levels of second definition groups corresponding to the control powers of the first definition...
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8102737 |
Power saving method for optical disk drive of rugged electronic device
A power saving method for an optical disk drive of a rugged electronic device is described. In the method, whether a watertight lid outside the optical disk drive is in open/closed state is...
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8094543 |
Information recording medium, reproducing apparatus and reproducing method
An information recording medium according to the present invention includes at least three information recording layers. If the readout power of a laser beam in reading information from an...
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8089844 |
Method and device for optical recording onto optical disc medium
There is provided an optical recording method for directing a recording pulse train to an optical disc medium to form marks thereon and for recording information as information about the edge...
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8081545 |
Optical disk image forming device and optical disk image forming method
When an optical disk image forming device forms an image on an optical disk, the image forming device reads information of kinds of coloring matters used in an image forming area from information...
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8077586 |
Optical recording head device, optical recording apparatus, and recording method
According to one embodiment, an optical recording head device includes a light source which outputs such a relaxation oscillation optical pulse that a full width at half maximum of a single pulse...
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8072865 |
Multi-layered high-density recording medium and optical power adjusting method therefor
A multi-layered high-density recording medium and an optical power adjusting method therefor. A multi-layered high-density recording medium includes multiple recording layers each of which contains...
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8072871 |
Short-pulse light-source device, laser driving method, optical pickup, and optical disc apparatus
The present invention realizes the emission of a high-output short-pulse beam and a reduction in power consumption. A laser control unit (2) of a short-pulse light-source device (1) raises a gate...
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8072855 |
Optical recording/reproducing apparatus and optical recording/reproducing method
Disclosed is an optical recording/reproducing apparatus. The optical recording/reproducing apparatus includes a laser light source capable of emitting pulsed laser light in a mode-locked state in...
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8068394 |
Recording method of optical disc drive
The invention is to provide a recording method of an optical disc drive, which first calibrates the write power with minimum recording speed, adjusts write powers for higher speeds, searches a...
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8068391 |
Optical recording/reproducing method, system, and program
An optical recording/reproducing system 1 reads a recorded signal written to a recording track of a recording medium 3 by light. The light is modulated by a drive signal on which a frequency signal...
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8064308 |
Optical disk recording device, method for recording data on optical disk, and optical disk
According to a method of the present invention for recording data on an optical disk, a recording pulse corresponding to a long mark includes a combination of a leading pulse and a subsequent...
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8064302 |
Optical disk drawing apparatus, host computer, and optical disk drawing method
A drawing pulse generating unit of an optical disk recording apparatus judges a bit stream of main data contained in a bit stream signal of frame-formatted data, and generates pulse signals DOTX 1...
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8031569 |
Playing data from an optical media drive
Example embodiments provide various techniques for playing data from an optical media drive. The optical media drive may detect certain media access information for use in accessing optical media....
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8023374 |
Optical disc recording and reproduction device and an optical disc recording and reproduction method
Trial writing is made by recording waveform different from that used to record information in a disc. In the trial writing, particularly, the strategy having short cooling time or large cooling...
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