| Patent Number |
Title Of Patent |
Date Issued |
| RE38802 |
Method for reproducing compressed information data from a disk using a spatial frequency less th |
September 27, 2005 |
| Method and apparatus for reproducing MPEG-compressed video data and compressed audio data from an optical disk having a diameter less than 140 mm and, a thickness of 1.2 mm.+-.0.1 mm, with a plurality of record tracks having data recorded thereon as embossed pits representing information |
| RE38638 |
Optical disk having a particular format to store user-selected data, such as video data or compu |
October 26, 2004 |
| An optical disk having a diameter less than 140 mm and, a thickness of 1.2 mm.+-.0.1 mm, with a plurality of record tracks having data recorded thereon as embossed pits representing information and exhibiting a track pitch in the range between 0.646 .mu.m and 1.05 .mu.m; with the tracks |
| RE38621 |
OPTICAL DISK HAVING A PARTICULAR FORMAT TO STORE USER-SELECTED DATA, SUCH AS COMPRESSED VIDEO DA |
October 12, 2004 |
| An optical disk having a diameter less than 140 mm and, a thickness of 1.2 mm.+-.0.1 mm, with a plurality of record tracks having data recorded thereon as embossed pits representing information and exhibiting a track pitch in the range between 0.646 .mu.m and 1.05 .mu.m; with the tracks |
| RE38502 |
Method and apparatus for recovering TOC and user information from an optical disk and using the |
April 20, 2004 |
| An optical disk having a diameter less than 140 mm and, a thickness of 1.2 mm.+-.0.1 mm, with a plurality of record tracks having data recorded thereon as embossed pits representing information and exhibiting a track pitch in the range between 0.646 .mu.m and 1.05 .mu.m; with the tracks |
| RE38481 |
Method and apparatus for recording MPEG-compressed video data and compressed audio data on a dis |
March 30, 2004 |
| Method and apparatus for recording MPEG-compressed video data end compressed audio data on an optical disk having a diameter leas than 140 mm and, a thickness of 1.2 mm.+-.0.1 mm, with a plurality of record tracks having data recorded thereon as embossed pits representing information and |
| RE37327 |
Method for reproducing compressed information data from a disk using a spatial frequency less th |
August 14, 2001 |
| Method and apparatus for reproducing MPEG-compressed video data and compressed audio data from an optical disk having a diameter less than 140 mm and, a thickness of 1.2 mm.+-.0.1 mm, with a plurality of record tracks having data recorded thereon as embossed pits representing information |
| 7200094 |
Reproduced signal evaluation apparatus and method, reproduction apparatus and method, and record |
April 3, 2007 |
| The present invention provides an apparatus and a method for precisely and adequately evaluating actual quality of reproduced data whenever applying a maximum likelihood decoder for converting signal reproduced from a recording medium into binary signal Based on data arrays of a pair of |
| 6940800 |
Reproduced signal evaluation apparatus and method, reproduction apparatus and method, and record |
September 6, 2005 |
| The present invention provides an apparatus and a method for precisely and adequately evaluating actual quality of reproduced data whenever applying a maximum likelihood decoder for converting signal reproduced from a recording medium into binary signal. Based on data arrays of a pair of |
| 6421304 |
Magneto-optical reproducing apparatus using magnetic wall displacement detector |
July 16, 2002 |
| A magneto-optical reproducing apparatus for reproducing from a magnetic film medium having at least a displacement layer, a switching layer, and a memory layer. A magnetic wall displacement is generated in the displacement layer in any region where the temperature exceeds the Curie t |
| 6353585 |
Apparatus and method of forming evaluation signal used in adjusting focus bias and adjusting ske |
March 5, 2002 |
| An apparatus of forming an evaluation signal used in adjusting focus bias and adjusting skew of a disk drive in which phase error information between a phase of a read data signal and a phase of a clock signal formed in synchronism with the read data signal, is detected, the phase error |
| 6339580 |
Apparatus and method of forming evaluation signal used in adjusting focus bias and adjusting ske |
January 15, 2002 |
| An apparatus of forming an evaluation signal used in adjusting focus bias and adjusting skew of a disk drive in which phase error information between a phase of a read data signal and a phase of a clock signal formed in synchronism with the read data signal, is detected, the phase error |
| 6268812 |
Optical rotating recording medium, data recording method, recording apparatus and reproducing ap |
July 31, 2001 |
| An optical rotating recording medium in which a 17-bit codeword is recorded converted from a 16 bit data, wherein (i) a 16-bit data word is coded to a 17-bit codeword set with restrictive conditions on a minimum number (d) of consecutive zeros, a maximum number (k) of consecutive zeros, |
| 6111833 |
Data decoder |
August 29, 2000 |
| In a data decoding apparatus of this invention, level of a reproduction RF signal 7a at the time of the binary level judgment of channel bit is temporarily stored into a RF signal level memory section 20. The portions which do not satisfy the conditions of the minimum run length and the |
| 6100724 |
Digital signal reproducing circuit |
August 8, 2000 |
| A digital signal reproducing circuit which enables precise measurement of a phase difference and jitter components of reproduction signals while realizing miniaturization of the circuit is disclosed. The digital signal reproducing circuit has a phase comparator for detecting a phase |
| 6014096 |
Data decoding method and device |
January 11, 2000 |
| If there is any portion in channel bit data obtained on converting a signal read out from a recording medium into a bi-level signal which fails to satisfy a condition concerning a minimum run length or a maximum run length of the same symbol, the channel bit data is corrected to improve |
| 5986592 |
Encoder decoder device not using an A/D converter and method thereof |
November 16, 1999 |
| An encoder/decoder device for improving the bit error rate, speedily and at low cost without using an A/D converter circuit. A comparator compares the playback signal loaded from the disk with a specified reference level, places the signal in binary notation and sends the binary informat |
| 5969651 |
Signal modulating method, signal modulating apparatus, signal demodulating method and signal dem |
October 19, 1999 |
| In the present invention, a partly duplexed conversion table is used as a conversion table for converting an M-bit based data string directly into an N-bit based code string without using margin bits. This conversion table is constituted by first and second sub-tables including plural co |
| 5870037 |
Method and apparatus, demodulating method and signal demodulating apparatus |
February 9, 1999 |
| In the present invention, a partly duplexed conversion table is used as a conversion table for converting an M-bit based data string directly into an N-bit based code string without using margin bits. This conversion table is constituted by first and second sub-tables including plural co |
| 5841513 |
Apparatus for reproducing sound signals recorded on a motion picture film with digital sound tra |
November 24, 1998 |
| A device for recording/reproducing a digital pattern as a sound track of a cinefilm is disclosed. The device includes a cinefilm 1 having an image recording area 2 in which an image is recorded, a perforation section 3 for film feed and digital pattern data recording areas 5 and 6 provid |
| 5835544 |
Clock signal reproduction circuit and data reproduction circuit |
November 10, 1998 |
| A clock signal reproduction circuit including an A/D conversion circuit for converting an input RF analog signal with a restricted upper limit of a frequency band into a digital signal, a digital phase error calculation unit for digitally calculating a phase error of a digital signal con |
| 5818367 |
Signal modulating method, signal modulating apparatus, signal demodulating method and signal dem |
October 6, 1998 |
| In the present invention, a partly duplexed conversion table is used as a conversion table for converting an M-bit based data string directly into an N-bit based code string without using margin bits. This conversion table is constituted by first and second sub-tables including plural co |
| 5802123 |
Clock signal reproduction circuit and data reproduction circuit |
September 1, 1998 |
| A clock signal reproduction circuit including an A/D conversion circuit for converting an input RF analog signal with a restricted upper limit of a frequency band into a digital signal, a digital phase error calculation unit for digitally calculating a phase error of a digital signal con |
| 5793779 |
Optical disk and method and apparatus for recording and then playing information back from that |
August 11, 1998 |
| An optical disk having a diameter less than 140 mm and, a thickness of 1.2 mm.+-.0.1 mm, with a plurality of record tracks having data recorded thereon as embossed pits representing information and exhibiting a track pitch in the range between 0.646 .mu.m and 1.05 .mu.m; with the tracks |
| 5764166 |
Signal binary coding circuit and digital signal processing apparatus |
June 9, 1998 |
| A signal binary coding circuit and a recording medium reproducing apparatus can binary coding efficiently the input signal sampled by the discrete time, by providing: a subtracting circuit for subtracting direct current components from the sampled value input; a comparator circuit for |
| 5734787 |
Optical disk having a particular format to store user-selected data, such as compressed video da |
March 31, 1998 |
| An optical disk having a diameter less than 140 mm and, a thickness of 1.2 mm.+-.0.1 mm, with a plurality of record tracks having data recorded thereon as embossed pits representing information and exhibiting a track pitch in the range between 0.646 .mu.m and 1.05 .mu.m; with the tracks |
| 5715355 |
Optical disk having a particular format to store user-selected data, such as video data or compu |
February 3, 1998 |
| An optical disk having a diameter less than 140 mm and, a thickness of 1.2 mm.+-.0.1 mm, with a plurality of record tracks having data recorded thereon as embossed pits representing information and exhibiting a track pitch in the range between 0.646 .mu.m and 1.05 .mu.m; with the tracks |
| 5617384 |
Method and apparatus for recovering TOC and user information from an optical disk and using the |
April 1, 1997 |
| An optical disk having a diameter less than 140 mm and, a thickness of 1.2 mm.+-.0.1 mm, with a plurality of record tracks having data recorded thereon as embossed pits representing information and exhibiting a track pitch in the range between 0.646 .mu.m and 1.05 .mu.m; with the tracks |
| 5596565 |
Method and apparatus for recording MPEG-compressed video data and compressed audio data on a dis |
January 21, 1997 |
| Method and apparatus for recording MPEG-compressed video data and compressed audio data on an optical disk having a diameter less than 140 mm and, a thickness of 1.2 mm.+-.0.1 mm, with a plurality of record tracks having data recorded thereon as embossed pits representing information and |
| 5592450 |
Method for reproducing compressed information data from a disk using a spatial frequency less th |
January 7, 1997 |
| Method and apparatus for reproducing MPEG-compressed video data and compressed audio data from an optical disk having a diameter less than 140 mm and, a thickness of 1.2 mm.+-.0.1 mm, with a plurality of record tracks having data recorded thereon as embossed pits representing information |
| 5579294 |
Magneto-optical medium and recording and/or reproducing apparatus thereof |
November 26, 1996 |
| An apparatus for recording and/or reproducing a magneto-optical recording medium having a recording layer, a reproducing layer and an intermediate layer for magnetically coupling the recording layer and the reproducing layer in a stationary state, in which the magnetic coupling between t |
| 5550797 |
Optical reproduction signal processing circuit for producing an RF signal and a servo signal wit |
August 27, 1996 |
| A processing circuit for an optical reproduction signal provided with a signal generating unit for dividing an optical reproduction signal output from a photo detector and including a plurality of signal components into a plurality of signals having frequency regions corresponding to the |
| 5550603 |
Motion picture film with digital sound track |
August 27, 1996 |
| A device for recording/reproducing a digital pattern as a sound track of a cinefilm is disclosed. The device includes a cinefilm 1 having an image recording area 2 in which an image is recorded, a perforation section 3 for film feed and digital pattern data recording areas 5 and 6 provid |
| 5546367 |
Method and disc apparatus for reproducing information signals and including compensation for dis |
August 13, 1996 |
| An apparatus for reproducing an optical disc in which a light beam radiated from a light source in an optical pickup is radiated to an optical disc and the return light from the disc is detected by a photodetector provided within the optical pickup for reproducing the information signal |
| 5513167 |
Optical recording apparatus |
April 30, 1996 |
| An optical recording apparatus for recording a pulse signal on a recording medium by using a laser light beam, wherein, as shown in FIG. 4 , for example, a pattern detecting circuit (31) is provided to detect a pulse pattern of a recording signal, and an amplitude of a succeeding signal |
| 5432774 |
Optical recording medium |
July 11, 1995 |
| An optical recording medium has a multi-layer film including a reproducing layer and a recording holding layer magnetically coupled to each other as a recording film. While a readout light is radiated to the optical recording medium for erasing the recording holding layer and the rep |
| 5390162 |
Method for reproducing signals recorded on optical recording medium |
February 14, 1995 |
| A method for reproducing a magneto-optical recording medium the recording pits of which are erased or relieved with rise in temperature of the recording medium caused by radiation of a readout light beam or an optical recording medium the reflectance of which is changed with rise in |
| 5380573 |
Optical recording medium |
January 10, 1995 |
| An optical recording medium has a multi-layer film including a reproducing layer and a recording holding layer, in which, while a readout light is radiated to the optical recording medium for transcribing signals magnetically recorded in the recording holding layer to the reproducing |
| 5371722 |
Method for recording sector control information on magneto-optical disk |
December 6, 1994 |
| Disclosed is a method for recording and reproducing sector control information to and from a novel magneto-optical disk to which the so-called erasure type data reproduction method or data-embossed type reproduction method applies. On the magneto-optical disk, sector control informat |
| 5367509 |
Method for reproducing information recorded on a magneto-optical recording medium including serv |
November 22, 1994 |
| This invention is directed to an improvement in a novel magneto-optical disc reproducing method of the record information erasing type or the record information raised or transfer type wherein a technique is employed to prevent the dimension of an actual reproduction region from varying |
| 5335213 |
Positional detection of a magneto-optic recording medium for controlling irradiation of a relief |
August 2, 1994 |
| A method for reproducing a magneto-optical recording medium the recording pits of which are erased or relieved with rise in temperature of the recording medium caused by radiation of a readout beam, or an optical recording medium the reflectance of which is changed with rise in tempe |
| 5329512 |
Temperature detection of a magneto-optic recording medium for controlling irradiation of an eras |
July 12, 1994 |
| A method for reproducing a magneto-optical recording medium the recording pits of which are erased or relieved with rise in temperature of the recording medium caused by radiation of a readout beam, or an optical recording medium the reflectance of which is changed with rise in tempe |
| 5208799 |
Magneto-optic recording method and magneto-optic recording/reproducing apparatus |
May 4, 1993 |
| A method and apparatus for recording and reproducing information onto and from a magneto-optic recording medium is disclosed. The magneto-optic recording medium has at least a reproducing layer and a recording layer. A recording optical head records information on the magneto-optic recor |
| 5144605 |
Optical disk apparatus and method for controlling movement of light spot thereof |
September 1, 1992 |
| The method of the present invention comprises detecting a recording pattern, which is different for each tract, in each of track groups consisting of a predetermined number N or tracks recorded in advance on an optical disk(1), generating a tracking signal S.sub.ET whose signal level |
