Matches 51 - 100 out of 108 < 1 2 3 >
Match Document Document Title
5764609 Disk data reproducing method and apparatus for reading data at arbitrary speed  
In the operation to access data on a disk, the data reading operation is enabled before the rotary speed of the spindle motor of the disk is completely regulated to thereby minimize the access time...
5761163 Track jump servo apparatus for disc reproducing system  
A disc reproducing system having a pickup for reading data recorded on a disc that is rotated by a disc drive motor. The system, also has a clock signal generator for generating a clock signal that...
5734634 Recording method and recording equipment of optical disc reproducing method and reproducing equipment of optical disc  
The present invention radiates laser light to an optical disc 1, detects a tracking error signal based on a concave and convex form of a track by means of its reflection light, applies a tracking...
5726958 Spindle motor gain control method for CD-ROM drives and apparatus therefor  
A method for controlling the gain of a spindle motor in a CD-ROM drive, includes the steps of: calculating a first number of tracks on a disc from a starting point of a program region to a...
5724329 Apparatus for controlling rotational servo by using frequency pulse signal generator  
An apparatus for controlling a rotational servo by using a frequency pulse signal generator is provided. The rotational servo controlling apparatus has a frequency pulse signal generator for...
5717672 Spindle servo apparatus for optical disk player  
A spindle servo apparatus for an optical disk player, which detects a maximum inversion interval or a maximum period from a read signal acquired from an optical disk by pickup means, compares the...
5708649 Optical disk capable of storing information data at difference clock rates  
A disk storage medium, for example, a magneto-optical compact disk, includes a plurality of data areas that have data stored therein and a plurality of address areas each associated with a...
5699335 Spindle motor driver  
A spindle motor driver is provided. The spindle motor driver includes a spindle motor for rotating an optical disc, an optical head for reading signals from the optical disc to reproduce the...
5691968 Optical disk unit  
An optical disk unit wherein a disk rotating speed is automatically adjusted for reading optical information from various optical disk types, each optical disk type requiring a different rotating...
5648944 Recording/reproducing apparatus that utilizes the servo clock signals to form read and write clock signals with different frequencies  
A disc recording and/or reproducing apparatus including a signal recording/reproducing section for recording and/or reproducing information signals on a disc 64 mm in diameter housed in a cartridge...
5646921 Method and apparatus for reproducing information recorded on CLV disc type record medium  
A record medium of disc type is recorded by a constant linear velocity. The record medium is reproduced by a reproducing apparatus, which reads the information from the rotated record medium into a...
5636196 Optical disc apparatus with selectively shiftable seek operation capture range  
An optical disc apparatus which expands the PLL pulling frequency range, and shortens the time required to start PLL pulling, by a simple construction. The linear velocity detection signal V e2 ...
5627811 Constant linear velocity optical disk apparatus having improved circuitry for speed data access  
An optical disk apparatus includes a disk servo unit which generates a servo signal based on a data signal read from an optical disk. The servo signal is supplied to a disk motor to control a...
5627805 Methods and apparatus for high speed optical storage device  
Methods and apparatus are provided for simultaneously reading data from multiple tracks of an optical disk at a high rate. Circuitry is provided for use with a detector matrix to read and buffer...
5621710 CD-ROM Drive and a control method for optimally controlling the spindle motor  
CD-ROM drive, including a pick-up for detecting recorded data from a CD-ROM, a control signal generation part for generating a acceleration/deceleration control signal, a driving extent control...
5602813 Disk, disk recording apparatus and disk reproducing apparatus  
When recording data, a disk jitter is detected by a rotary encoder to obtain a rotation synchronizing clock which coincides in time axis variation therewith. The data are written once into a memory...
5592465 Disc recording method  
In a disc recording method in which a disc on which servo control data is recorded in advance in alignment with a radial direction is divided into a plurality of zones in the radial direction and...
5583841 Apparatus for improved search on information storage member rotating at constant linear velocity  
In a data reproducing apparatus, an optical pick-up is radially movable with respect to, and recovers information from, an information storage member. A motor rotates an information storage member....
5568467 Information recording format having a plurality of bands with independent read and write control data  
A data recording medium using a format that includes: a data zone having a plurality of bands composed of at least one track, in which user data are written; and a control zone in which band...
5561644 Short seeking time optical disc apparatus  
In an optical disk apparatus for recording and/or reproducing a predetermined data on/from a disk recording medium rotated by constant linear velocity (CLV) system, at seek operation for moving the...
5544134 Optical disk apparatus for reading data from zones of an optical disk using different frequency clocks  
The optical disk formatted by the M.CAV mode has a plurality of tracks for recording data, arranged in a substantially coaxial manner, which are divided into a plurality of zones in its radial...
5539723 Method, apparatus, and medium for recording information in data sections having number of bytes which increase in circumference of tracks on medium  
An information recording and reproducing method and apparatus with increased recording density of an information recording medium using the sample servo method driven with a fixed angular velocity...
5528574 Disk reproducing apparatus capable of increasing speed of access to disks recorded at constant linear velocity  
An optical disk reproducing apparatus for reproducing at a high access-speed an optical disk on which data has been recorded at a constant linear velocity (CLV) includes a control circuit for...
5521895 Optical disk reproducing apparatus for controlling the rotational speed of a spindle motor between a CLV control and a CAV control  
An optical disk reproducing apparatus uses a spindle motor having a low torque to reduced power consumption and manufacturing cost while maintaining a low error rate for reproduced data. The...
5477522 Apparatus for controlling spindle motor of compact disc utilizing appliance  
An apparatus and method for controlling spindle motor of compact disc utilizing appliance are disclosed, in which the spindle motor is controlled early to meet a rotation speed on a target track,...
5465244 Disc reproducing apparatus  
A disc reproducing aparatus is provided which is able to read out all of the data stored on the disc in a short time. The disk reproducing apparatus reproduces data stored on a disc and comprise a...
5463604 Optical disc with data recorded at different rates on different zones and recording apparatus, and reproducing apparatus therefor  
An optical disc recording apparatus for dividing an information record surface of an optical disc into a plurality of record zones and recording information at a data rate which differs for every...
5444687 Method and device for accessing an optical disc  
In a method and a device for accessing an optical disc such as a Compact Disc, a CD-ROM, a CD-I and a MD, an optical disc in which data is recorded or to be recorded at a constant linear velocity...
5420841 Spindle motor control circuit for optical recording and regenerating system  
A spindle motor control circuit for an optical recording and regenerating system is disclosed. The spindle motor control circuit adjusts the gains in response to the change of the position of the...
5412629 Method and apparatus for recording and/or reproducing data on a disk formatted in accordance with a constant linear velocity (CLV) system  
When recording and/or reproducing data on a disk formatted in a constant linear velocity (CLV) system while the disk is rotated and a head is movable for scanning radially successive circular...
5394387 Information recording/reproducing method  
An information recording/reproducing method in which a recording area is divided into a plurality of zones in the radial direction of a disk so that the lengths of recording pits become the same in...
5347506 Optical disk player including a plurality of independent pick-ups  
An optical disk player for simultaneously reading data recorded on different areas of the optical disk is disclosed. The optical disk player provides a plurality of pairs of optical pick-ups and...
5161142 Disk playing apparatus for playing CLV disks  
An apparatus for playing CLV disks is provided with a speed signal generator for generating a speed signal having a frequency corresponding to the rotational speed of the disk, and the rotation of...
5153869 Apparatus for recording information on an optical disk with a modified constant linear density system  
An information recording apparatus includes a rotating section for rotating an optical disk at a constant angular velocity, the disk including a spiral recording track or concentric recording...
5117412 Optical disc with servo pattern providing enhanced reliability of servo clock detection and apparatus for accessing the optical disc  
An optical disc having a plurality of information tracks. Each information track having a data field including multiple data bytes and a servo field including a first servo byte having a pair of...
5111305 Video disk player having CLV format  
In a video disk player during the scan reproducing mode, a jump of a calculated number of tracks is carried out so that, even when a video disk is recorded according to the constant linear format,...
5063552 Optical disk apparatus with data transfer rate and rotational speed variable by annular zones  
A control system is provided for an optical disk driving apparatus adapted to rotate an optical disk having a plurality of tracks, and which is adapted, during the rotation of the disk, to perform...
5010540 Apparatus for recording and reproducing information on and from an optical disk  
An apparatus for recording and reproducing information on and from an optical disk includes a first control for producing a first control signal for controlling the rotational speed of a rotational...
4984227 Optical disc device  
An optical disc device includes a disc drive unit for driving an optical disc to rotate at a constant rotating speed, and an optical head for recording and reproducing data to and from the optical...
4908810 Method and apparatus for controlling a spindle servo using pickup position and shift information  
A method of initiating a spindle servo for use in an apparatus which reproduces signals from a video disk. When a spindle servo control loop is opened, a spindle motor is controlled according to a...
4901300 Method of and apparatus for recording an information signal  
A method of and apparatus (FIG. 4) for recording an information signal (Vi), in particular an EFM-modulated signal, are revealed, which information signal comprises time-code signals which...
4864554 Method of and device for scanning a radiation-sensitive surface of a rotating carrier with a radiation beam  
A method and apparatus for scanning a rotating optical disc record carrier with a radiation beam which forms a scanning spot on the carrier and which is moved radially relative thereto. Pulses are...
4855978 Video/compact disk player having reduced track search time  
A player system for a video disk or a compact audio disk in which the time to move the pickup to the start of a playing position of a selection other than at the beginning of the disk is...
4841511 Constant linear velocity disk rotating apparatus  
A constant linear velocity disk rotating apparatus for rotating a disk storing data recorded therein substantially at fixed linear recording speed detects a signal recorded in the disk by signal...
4819218 Quasi-constant linear-velocity disk having corresponding radii of adjacent annular zones related by a rational number for distributing prerecorded indicia to form a coherent write clock signal  
A disk (magnetic, magneto-optical or optical) includes information-bearing tracks having prerecorded indicia, preferably tracking pads, distributed uniformly along each track for phase locking a...
4794584 Method and apparatus for scanning the recording surface of a rotating disc-shaped record carrier  
A method and apparatus for scanning a plurality of concentric or spiral tracks on the surface of a rotating disc-shaped record carrier with a beam of radiation which may be modulated with...
4780866 Method and apparatus combining an information-bearing disk and a disk drive mechanism  
An information-bearing disk (magnetic-rigid or floppy, magneto-optical-Kerr or Faraday, optical or an equivalent thereof) includes equally spaced data-storing tracks grouped in a plurality of...
4751693 Memory disk apparatus  
An optical disk apparatus has an optical head for recording information on or reproducing information from an optical disk. The optical disk has a number of spiral or concentric tracks and a number...
4750059 Data recording format for an information-bearing disk  
An information-bearing disk (magnetic-rigid or floppy, magneto-optical - Kerr or Faraday, optical or an equivalent thereof) includes equally spaced data-storing tracks grouped in a plurality of...
4710827 Servo apparatus  
An apparatus for reproducing picture signals in conformity with revolution of a motor from a disk on which the picture signals are recorded includes separating means for successively separating...
Matches 51 - 100 out of 108 < 1 2 3 >