Patent application number | Description | Published |
20080259781 | Disk recording medium, disk drive apparatus, reproducing method, and disk manufacturing method - A recording and reproducing area and a reproduction-only area are formed by wobbling a groove formed in a spiral fashion to form a track to be tracked on a disk. The recording and reproducing area has address information recorded by wobbling of the groove and information recorded and reproduced by phase change marks on the track formed by the groove where the address information is recorded. The reproduction-only area has prerecorded information recorded by wobbling of the groove. | 10-23-2008 |
20080267032 | REPRODUCTION-ONLY RECORDING MEDIUM, REPRODUCING APPARATUS, REPRODUCING METHOD, AND DISK MANUFACTURING METHOD - A ROM disk having a block data format provided with linking areas as with a rewritable disk. Main data recorded in a main data area and linking data recorded in a linking area in each block are scrambled by identical scrambling data. The scrambling data is generated by a random sequence using address information of the block as an initial value. | 10-30-2008 |
20080279072 | RECORDING MEDIUM, RECORDING APPARTUS, REPRODUCTION APPARATUS, RECORDING METHOD AND REPRODUCTION METHOD - The present invention allows the usability of a write-once recording medium to be enhanced. The write-once recording medium is provided with an ordinary recording/reproduction area, an alternate area, a first alternate-address management information area (DMA) and a second alternate-address management information area (TDMA). In addition, written/unwritten state indication information (a space bitmap) is also recorded. The second alternate-address management information area is an area allowing alternate-address management information recorded therein to be renewed by adding alternate-address management information thereto. In addition, the written/unwritten state indication information indicates whether or not data has been recorded in each data unit (cluster) on the recording medium. Thus, it is possible to correctly execute management of defects and properly implement renewal of data in the write-once recording medium. | 11-13-2008 |
20080291794 | METHOD OF, AND APPARATUS FOR, RECORDING ADDRESS INFORMATION TO DISC MEDIUM | 11-27-2008 |
20090010117 | Optical Disk Manufacturing Method and Device, Optical Disk, and Reproduction Method Thereof - Optical discs are adapted to be used with a light beam having a wavelength of 405 nm for recording or reproducing data. Error correcting blocks for recording BMID including copy protection key information are defined on optical discs ( | 01-08-2009 |
20090034383 | DISK-SHAPED RECORD MEDIUM AND PRODUCING METHOD FOR SAME, DISK RECORDING METHOD AND DEVICE, AND DISK PLAYBACK METHOD AND DEVICE - To record specific information to a disk-shaped record medium and reproduce the recorded specific information without any influence on the error correction capability. Copy protection information (CPID) having an error correction code appended thereto, shuffled and otherwise treated is sent as a CPID bit block to an EDC rewrite circuit ( | 02-05-2009 |
20090161526 | Disc-shaped recording medium, cutting apparatus for same, and disc drive - There is provided an optical disc having preformed thereon a spiral wobbled track as a grove and/or land along with data is to be recorded. The track is wobbled for a series of predetermined signal units each composed of an FSK information bit part based on a waveform resulted from FSK modulation of information bit and a singe-frequency part based on a waveform of a single frequency. The FSK modulation uses two different frequencies of which the one is the same as the single frequency and the other is different from the single frequency. These different frequencies are in such a relation that each of them has an even number of wobbles and an odd number of wobbles alternately in a predetermined cycle. | 06-25-2009 |
20090323493 | MULTILAYER OPTICAL RECORDING MEDIUM, RECORDING DEVICE, AND RECORDING LASER POWER ADJUSTMENT METHOD - A multilayer optical recording medium includes three or more recording layers formed in a thickness direction. Trial writing areas provided in the respective recording layers to adjust the power of recording laser are formed not to overlap at a position in a planar direction in adjacent ones of the recording layers. Further, the trial writing areas are formed to have an overlapping portion at a position in the planar direction in one of the recording layers and at least another one of the recording layers not adjacent to the one of the recording layers. | 12-31-2009 |
20100002556 | REPRODUCTION SIGNAL EVALUATION METHOD, REPRODUCTION SIGNAL EVALUATION UNIT, AND OPTICAL DISK DEVICE ADOPTING THE SAME - A reproduction signal evaluation method for evaluating quality of a reproduction signal reproduced from an information recording medium based on a binary signal generated from the reproduction signal using a PRML signal processing system, includes: a pattern extraction step of extracting, from the binary signal, a specific state transition pattern which has the possibility of causing a bit error; a step of computing a differential metric based on the binary signal; an extraction step of extracting the differential metric which is not greater than a predetermined signal processing threshold; a step of determining a mean value of the differential metrics which are not greater than the signal processing threshold and extracted in the extraction step; a standard deviation computing step of determining a standard deviation which corresponds to an error rate predicted from the mean value; and an evaluation step of evaluating a quality of the reproduction signal using the standard deviation. | 01-07-2010 |
20100034059 | DISK RECORDING MEDIUM, DISK DRIVE APPARATUS, REPRODUCTION METHOD, AND DISK MANUFACTURING METHOD - A recording and reproducing area and a reproduction-only area are formed by wobbling a groove formed in a spiral fashion to form a track to be tracked on a disk. The recording and reproducing area has address information recorded by wobbling of the groove and information recorded and reproduced by phase change marks on the track formed by the groove where the address information is recorded. The reproduction-only area has prerecorded information recorded by wobbling of the groove. | 02-11-2010 |
20100103790 | DISK RECORDING MEDIUM, DISK PRODUCTION METHOD, DISK DRIVE APPARATUS - A disk recording medium which can implement a recording method having a high degree of reliability for additional information is disclosed. The disk recording medium has a recording and reproduction region into and from which first data can be recorded and reproduced in accordance with a rewritable or write-once-read-many recording method and from which second data recorded in the form of wobbling of a groove can be reproduced. The second data includes address information and additional information. The additional information of the second data is coded in accordance with a first error correction method, and the coded additional information and the address information are recorded in a state coded in accordance with a second error correction method. | 04-29-2010 |
20100214895 | REPRODUCTION SIGNAL EVALUATION METHOD, REPRODUCTION SIGNAL EVALUATION UNIT, AND OPTICAL DISK DEVICE ADOPTING THE SAME - A reproduction signal evaluation unit has: a pattern detection section for extracting, from a binary signal, a specific state transition pattern which has a possibility of causing a bit error; a differential metric computing section for computing a differential metric based on the binary signal of the extracted state transition pattern; an error computing section for computing an error rate predicted based on an integration value that is integrated by an integration section, a count value that is counted by a pattern count section, an integration value that is integrated by another integration section, and a count value that is counted by another pattern count section, and a standard deviation computing section for computing a standard deviation based on the computed error rate. | 08-26-2010 |
20100246355 | INFORMATION PROCESSING APPARATUS, INFORMATION PROCESSING METHOD, AND PROGRAM - An information processing apparatus includes a data processing unit configured to perform data processing on data read from a data recordable disc. The data processing unit performs a physical mark verification process for verifying whether or not a physical mark that is identification data unique to each of mother discs used when the disc was manufactured has been recorded on the disc, and a signature verification process for obtaining, from the disc, a token containing an electronic signature generated on the basis of a medium ID that is an identifier unique to each disc by a content providing server that provided the recorded content of the disc and for performing signature verification, and reproduces recorded content of the disc under a condition in which the recording of a physical mark in the physical mark verification process has been confirmed and signature verification in the signature verification process holds true. | 09-30-2010 |
20110026383 | REPRODUCED SIGNAL EVALUATION METHOD AND WRITE ADJUSTMENT METHOD - The present invention aims to provide a reproduced signal evaluation method and a write adjustment method for offering a Blu-ray disc having a large storage capacity with excellent media compatibility. An evaluation index L-SEAT is calculated through signed addition using a Euclidean distance difference calculated from at least one of target signals in which a focused edge is shifted to the right and left, and the quality of the reproduced signal is evaluated based on the evaluation index. Write condition adjustment using the index enables write adjustment not depending on SNR and achieving high adjustment accuracy. | 02-03-2011 |
20110103208 | MANUFACTURING METHOD FOR OPTICAL DISC, OPTICAL DISC, PLAYBACK METHOD FOR OPTICAL DISC, PLAYBACK APPARATUS FOR OPTICAL DISC, RECORDING APPARATUS FOR OPTICAL DISC - Address information that has been error correction encoded is recorded on a second version of a recording medium after being transformed such that such that the address decoding cannot be performed by a playback device that is not compatible with the second version of the recording medium. The address decoding for the second version of the recording medium cannot be performed by the incompatible playback device (for example, a playback device that was manufactured to be compatible only with a first version of the recording medium). In other words, in the playback device that is not compatible with the second version of the recording medium, a state is created in which address errors cannot be corrected, so access is impossible (recording and playback are impossible). | 05-05-2011 |
20110134728 | DISC-SHAPED RECORDING MEDIUM, CUTTING APPARATUS FOR SAME, AND DISC DRIVE - There is provided an optical disc having preformed thereon a spiral wobbled track as a grove and/or land along with data is to be recorded. The track is wobbled for a series of predetermined signal units each composed of an FSK information bit part based on a waveform resulted from FSK modulation of information bit and a singe-frequency part based on a waveform of a single frequency. The FSK modulation uses two different frequencies of which the one is the same as the single frequency and the other is different from the single frequency. These different frequencies are in such a relation that each of them has an even number of wobbles and an odd number of wobbles alternately in a predetermined cycle. | 06-09-2011 |
20110194393 | RECORDABLE OPTICAL DISK, RECORDING DEVICE, RECORDING METHOD, AND REPRODUCTION DEVICE - The present invention is to realize a proper inner zone layout in an optical disk having at least three layers. A test area is provided in the inner zone (inner circumference side area) in each of recording layers. The test areas of each layer are so disposed as to be prevented from overlapping with each other in the layer direction. Furthermore, the number of management information recording/reproduction areas overlapping with the test area in the layer direction at a position closer to the laser-incident surface than this test area is set equal to or smaller than one in each test area of each recording layer. The management information recording/reproduction areas are each so disposed as to be prevented from overlapping with the test areas in the respective recording layers in the layer direction on the disk substrate side of the test areas. | 08-11-2011 |
20110216637 | METHOD OF, AND APPARATUS FOR, RECORDING ADDRESS INFORMATION TO DISC MEDIUM | 09-08-2011 |
20120008471 | RECORDING MEDIUM, RECORDING APPARATUS, REPRODUCTION APPARATUS, RECORDING METHOD AND REPRODUCTION METHOD - The present invention allows the usability of a write-once recording medium to be enhanced. The write-once recording medium is provided with an ordinary recording/reproduction area, an alternate area, a first alternate-address management information area (DMA) and a second alternate-address management information area (TDMA). In addition, written/unwritten state indication information (a space bitmap) is also recorded. The second alternate-address management information area is an area allowing alternate-address management information recorded therein to be renewed by adding alternate-address management information thereto. In addition, the written/unwritten state indication information indicates whether or not data has been recorded in each data unit (cluster) on the recording medium. Thus, it is possible to correctly execute management of defects and properly implement renewal of data in the write-once recording medium. | 01-12-2012 |
20120008473 | PLAYBACK METHOD FOR OPTICAL DISC, PLAYBACK APPARATUS FOR OPTICAL DISC, NON-TRANSISTORY COMPUTER PROGRAM PRODUCT - Address information that has been error correction encoded is recorded on a second version of a recording medium after being transformed such that such that the address decoding cannot be performed by a playback device that is not compatible with the second version of the recording medium. The address decoding for the second version of the recording medium cannot be performed by the incompatible playback device (for example, a playback device that was manufactured to be compatible only with a first version of the recording medium). In other words, in the playback device that is not compatible with the second version of the recording medium, a state is created in which address errors cannot be corrected, so access is impossible (recording and playback are impossible). | 01-12-2012 |
20120017137 | DISC RECORDING MEDIUM, DISK DRIVE APPARATUS, REPRODUCTION METHOD, AND DISK MANUFACTURING METHOD - A recording and reproducing area and a reproduction-only area are formed by wobbling a groove formed in a spiral fashion to form a track to be tracked on a disk. The recording and reproducing area has address information recorded by wobbling of the groove and information recorded and reproduced by phase change marks on the track formed by the groove where the address information is recorded. The reproduction-only area has prerecorded information recorded by wobbling of the groove. | 01-19-2012 |
20120113793 | OPTICAL RECORDING MEDIUM, RECORDING/REPRODUCTION APPARATUS, RECORDING METHOD, AND RECORDING/REPRODUCTION METHOD - An optical recording medium provided with one or a plurality of recording layers includes an adjustment data recording area for recording therein adjustment data used for adjusting focus or spherical aberration of laser light used for recording/reproduction, the adjustment data recording area being disposed at a predetermined position on each of the one or plurality of recording layers, and a determination information recording area for recording therein determination information indicating whether or not the adjustment data has been recorded in the adjustment data recording area in each of the one or plurality of recording layers. | 05-10-2012 |
20120137193 | DISC RECORDING MEDIUM, DISK DRIVE APPARATUS, REPRODUCTION METHOD, AND DISK MANUFACTURING METHOD - A recording and reproducing area and a reproduction-only area are formed by wobbling a groove formed in a spiral fashion to form a track to be tracked on a disk. The recording and reproducing area has address information recorded by wobbling of the groove and information recorded and reproduced by phase change marks on the track formed by the groove where the address information is recorded. The reproduction-only area has prerecorded information recorded by wobbling of the groove. | 05-31-2012 |
20120147723 | INFORMATION RECORDING DEVICE, INFORMATION REPRODUCING DEVICE, RECORDING MEDIUM MANUFACTURING DEVICE, INFORMATION RECORDING MEDIUM, METHOD, AND PROGRAM - An information recording processing constitution realizing both readout difficulty and high-precision readout is provided. Superimposition recording of highly secret additional information such as a cryptographic key in a groove signal recorded on a disk, which superimposition recording realizes both readout difficulty and high-precision readout, can be performed. The groove signal to which a phase error corresponding to a bit value is set is recorded at a time of recording of the additional information, and at a time of readout of the additional information, the phase error of the groove signal in a predetermined section is subjected to an integrating process and the direction of the phase error of the groove signal within each section is determined. The recording and reproduction of the additional information for increasing readout difficulty and realizing high-precision readout is realized by such processes. | 06-14-2012 |
20120201112 | REPRODUCTION SIGNAL EVALUATION METHOD, REPRODUCTION SIGNAL EVALUATION UNIT, AND OPTICAL DISK DEVICE ADOPTING THE SAME - A reproduction signal evaluation method evaluates the quality of a reproduction signal reproduced from an information recording medium based on a binary signal generated from the reproduction signal using a PRML signal processing system. A pattern extraction step extracts, from the binary signal, a specific state transition pattern which has the possibility of causing a bit error; a step computes a differential metric based on the binary signal; an extraction step extracts the differential metric which is not greater than a predetermined signal processing threshold; a step determines a mean value of the differential metrics which are not greater than the signal processing threshold and extracted in the extraction step; a standard deviation computing step determines a standard deviation which corresponds to an error rate predicted from the mean value; and an evaluation step evaluates a quality of the reproduction signal using the standard deviation. | 08-09-2012 |
20120257485 | METHOD OF, AND APPARATUS FOR, RECORDING ADDRESS INFORMATION TO DISC MEDIUM | 10-11-2012 |
20130021895 | MANUFACTURING METHOD FOR OPTICAL DISC, OPTICAL DISC, PLAYBACK METHOD FOR OPTICAL DISC, PLAYBACK APPARATUS FOR OPTICAL DISC, RECORDING APPARATUS FOR OPTICAL DISC - Address information that has been error correction encoded is recorded on a second version of a recording medium after being transformed such that such that the address decoding cannot be performed by a playback device that is not compatible with the second version of the recording medium. The address decoding for the second version of the recording medium cannot be performed by the incompatible playback device (for example, a playback device that was manufactured to be compatible only with a first version of the recording medium). In other words, in the playback device that is not compatible with the second version of the recording medium, a state is created in which address errors cannot be corrected, so access is impossible (recording and playback are impossible). | 01-24-2013 |
20130028067 | MANUFACTURING METHOD FOR OPTICAL DISC, OPTICAL DISC, PLAYBACK METHOD FOR OPTICAL DISC, PLAYBACK APPARATUS FOR OPTICAL DISC, RECORDING APPARATUS FOR OPTICAL DISC - Address information that has been error correction encoded is recorded on a second version of a recording medium after being transformed such that such that the address decoding cannot be performed by a playback device that is not compatible with the second version of the recording medium. The address decoding for the second version of the recording medium cannot be performed by the incompatible playback device (for example, a playback device that was manufactured to be compatible only with a first version of the recording medium). In other words, in the playback device that is not compatible with the second version of the recording medium, a state is created in which address errors cannot be corrected, so access is impossible (recording and playback are impossible). | 01-31-2013 |
20130039158 | MANUFACTURING METHOD FOR OPTICAL DISC, OPTICAL DISC, PLAYBACK METHOD FOR OPTICAL DISC, PLAYBACK APPARATUS FOR OPTICAL DISC, RECORDING APPARATUS FOR OPTICAL DISC - Address information that has been error correction encoded is recorded on a second version of a recording medium after being transformed such that such that the address decoding cannot be performed by a playback device that is not compatible with the second version of the recording medium. The address decoding for the second version of the recording medium cannot be performed by the incompatible playback device (for example, a playback device that was manufactured to be compatible only with a first version of the recording medium). In other words, in the playback device that is not compatible with the second version of the recording medium, a state is created in which address errors cannot be corrected, so access is impossible (recording and playback are impossible). | 02-14-2013 |
20130088945 | MANUFACTURING METHOD FOR OPTICAL DISC, OPTICAL DISC, PLAYBACK METHOD FOR OPTICAL DISC, PLAYBACK APPARATUS FOR OPTICAL DISC, RECORDING APPARATUS FOR OPTICAL DISC - Address information that has been error correction encoded is recorded on a second version of a recording medium after being transformed such that such that the address decoding cannot be performed by a playback device that is not compatible with the second version of the recording medium. The address decoding for the second version of the recording medium cannot be performed by the incompatible playback device (for example, a playback device that was manufactured to be compatible only with a first version of the recording medium). In other words, in the playback device that is not compatible with the second version of the recording medium, a state is created in which address errors cannot be corrected, so access is impossible (recording and playback are impossible). | 04-11-2013 |
20130201813 | RECORDABLE OPTICAL DISC, RECORDING DEVICE, AND RECORDING METHOD - The present invention is to realize a proper inner zone layout in a quadruple-layer disk. | 08-08-2013 |
20140086037 | OPTICAL INFORMATION RECORDING MEDIUM AND OPTICAL INFORMATION RECORDING MEDIUM PLAYBACK APPARATUS - An optical information recording medium operated by CAV or zone CAV, wherein a groove that wobbles is formed in advance, and information is recorded in the groove and a land adjacent to the groove, an address is recorded by a wobble signal of the groove, the groove is alternately provided with a first section recording an address N by the wobble signal, and a second section recording an address (N−1) or (N+1) by the wobble signal, in two groove tracks sandwiching a land track, the first section of one of the groove tracks matches the second section of the other of the groove tracks, and an address of the groove is read from the first section, and an address of the land is read from the first and the second sections located on both sides of the land track, and recording a same address. | 03-27-2014 |