Abstract:
The present invention relates to an optical disc recording method and apparatus of a mark length recording system in which the laser light is illuminated on a recording surface of an optical disc to form pits for information recording. According to the present invention a first pulse (V11) corresponding to recording data, a second pulse (V21) for synthesis to a leading end of said first pulse (V11) and a third pulse (V31) for synthesis to a trailing end of said first pulse (V11) are generated, wherein said first to third pulses (V11, V21, V31) are synthesized to generate said drive pulse; and the level or the pulse width of one or more of said first to third pulses (V11, V21, V31) generated (121) is varied depending on at least one of the lengths of the pit and the land formed. This enables recording with an optimal pit shape at a speed faster than a quadrupled speed, such as at an octupled speed or a duo-deca-tupled speed.
Abstract:
The present invention relates to an optical disc recording method and apparatus of a mark length recording system in which the laser light is illuminated on a recording surface of an optical disc to form pits for information recording. According to the present invention a first pulse (V11) corresponding to recording data, a second pulse (V21) for synthesis to a leading end of said first pulse (V11) and a third pulse (V31) for synthesis to a trailing end of said first pulse (V11) are generated, wherein said first to third pulses (V11, V21, V31) are synthesized to generate said drive pulse; and the level or the pulse width of one or more of said first to third pulses (V11, V21, V31) generated (121) is varied depending on at least one of the lengths of the pit and the land formed. This enables recording with an optimal pit shape at a speed faster than a quadrupled speed, such as at an octupled speed or a duo-deca-tupled speed.
Abstract:
A recording apparatus generates a first pulse (EQEFM signal) in accordance with recording data such as an EFM signal. A second pulse (first overdrive pulse) to be combined with substantially the leading edge of the first pulse is generated. A third pulse (end overdrive pulse) to be combined with substantially the trailing edge of the first pulse is generated. The first, second, and third pulses are combined to synthesize a driving pulse, and the driving pulse is supplied to a laser unit. At least one of the first, second, and third pulses is controlled so that one of the level and the pulse duration thereof is varied in accordance with the length of formed pits and lands.
Abstract:
The present invention relates to an optical disc recording method and apparatus of a mark length recording system in which the laser light is illuminated on a recording surface of an optical disc to form pits for information recording. According to the present invention a first pulse (V11) corresponding to recording data, a second pulse (V21) for synthesis to a leading end of said first pulse (V11) and a third pulse (V31) for synthesis to a trailing end of said first pulse (V11) are generated, wherein said first to third pulses (V11, V21, V31) are synthesized to generate said drive pulse; and the level or the pulse width of one or more of said first to third pulses (V11, V21, V31) generated (121) is varied depending on at least one of the lengths of the pit and the land formed. This enables recording with an optimal pit shape at a speed faster than a quadrupled speed, such as at an octupled speed or a duo-deca-tupled speed.
Abstract:
A METHOD FOR RECORDING ON A WRITE-ONCE TYPE OPTICAL DISC (I). A LASER LIGHT BEAM EXCITED TO LIGHT EMISSION BY A RECORDING PULSE HAVING A PULSE WIDTH CORRESPONDING TO THE LENGTH OF A PIT FORMED, WITH THE RECORDING POWER OF SUBSTANTIALLY THE LEADING END OF THE PULSE BEING STEPPED OVER PLURAL STAGES, IS ILLUMINATED ON A WRITE-ONCE TYPE OPTICAL DISC (1) FOR RECORDING. THIS ENABLES RECORDING WITH AN OPTIMAL PIT SHAPE AT A SPEED FASTER THAN A QCTUPLED SPEED, SUCH AS AT AN OCTUPLED SPEED OR A DUO-DECA-TUPLED SPEED.
Abstract:
The present invention relates to an optical disc recording method and apparatus of a mark length recording system in which the laser light is illuminated on a recording surface of an optical disc to form pits for information recording. According to the present invention a first pulse (V11) corresponding to recording data, a second pulse (V21) for synthesis to a leading end of said first pulse (V11) and a third pulse (V31) for synthesis to a trailing end of said first pulse (V11) are generated, wherein said first to third pulses (V11, V21, V31) are synthesized to generate said drive pulse; and the level or the pulse width of one or more of said first to third pulses (V11, V21, V31) generated (121) is varied depending on at least one of the lengths of the pit and the land formed. This enables recording with an optimal pit shape at a speed faster than a quadrupled speed, such as at an octupled speed or a duo-deca-tupled speed.
Abstract:
The present invention relates to an optical disc recording method and apparatus of a mark length recording system in which the laser light is illuminated on a recording surface of an optical disc to form pits for information recording. According to the present invention a first pulse (V11) corresponding to recording data, a second pulse (V21) for synthesis to a leading end of said first pulse (V11) and a third pulse (V31) for synthesis to a trailing end of said first pulse (V11) are generated, wherein said first to third pulses (V11, V21, V31) are synthesized to generate said drive pulse; and the level or the pulse width of one or more of said first to third pulses (V11, V21, V31) generated (121) is varied depending on at least one of the lengths of the pit and the land formed. This enables recording with an optimal pit shape at a speed faster than a quadrupled speed, such as at an octupled speed or a duo-deca-tupled speed.
Abstract:
PROBLEM TO BE SOLVED: To provide a transmitter-receiver and a transmission/reception method which can support signals in a plurality of formats by selecting a signal path.SOLUTION: A transmitter-receiver 200 comprises an HDMI reception unit 202, a video processor 203, a selector 205 and a micro-computer 206. As a repeater, the transmitter-receiver 200 is connected with a transmitter 100 as a source and a receiver 300 as a sink. The micro-computer 206 determines a format of an image signal from the transmitter 100. Then, if the format of the image signal is supported by the video processor 203, the micro-computer 206 selects a signal path passing through the video processor 203, and if the format of the image signal is not supported by the video processor 203, the micro-computer 206 selects a signal path not passing through the video processor 203.
Abstract:
PROBLEM TO BE SOLVED: To provide a content reproduction system, a content output apparatus, a content reproduction apparatus, and a content reproduction method capable of easily preventing the so-called missing of a start portion in the case of reproducing contents such as music and video. SOLUTION: The content reproduction apparatus acquires a standby time until the content reproduction apparatus is turned into a content reproducible state after receiving an input of a content signal via an input output means and controls the output start timing of the contents signal on the basis of the standby time. COPYRIGHT: (C)2007,JPO&INPIT