Abstract: A disc table employed in a disc recording/reproducing apparatus has, as a recording medium, a recording disc, such as an optical disc or a magneto-optical disc, on which information signals are pre-recorded or are to be recorded. The disc table includes a fitting member fitted from its distal end into a circular center aperture of the recording disc, a table section which is integrated to the fitting member at a proximal side of the fitting member and on which a rim portion around the center aperture of the disc is set, a thrusting and supporting unit for thrusting and supporting the recording disc with respect to the table section, and a centering unit provided at a proximal side of the fitting member and adapted for thrusting the rim portion around the center aperture of the recording disc for aligning the center of rotation of the recording disc with the center of rotation of the fitting member.

Abstract: An optical disc includes a disc base plate of a light-transmitting synthetic material having a recess for mounting a magnetic plate, and a holding part, integral with the disc base plate, for loosely holding the magnetic plate mounted in the recess with respect to the disc base plate. It is possible with the present optical disc to prevent distortion of the disc base plate otherwise caused by the difference in thermal expansion coefficients of the two components to inhibit double refraction of the disc base plate otherwise caused by such distortion to maintain good recording/reproducing characteristics.

Abstract: The present invention is to provide an apparatus for recording and/or reproducing a recording medium which comprises recording and reproducing means for recording or reproducing data on or from a recording medium in which management information for recording or reproducing data is recorded together with data, designating means for designating a pause position of one data and control means for controlling the recording and reproducing means based on the management information such that the recording and reproducing means records or reproduces data on or from the recording medium, recognizing a time point at which the designating means is operated during data is recorded on or reproduced from the recording medium by the recording and reproducing means and controlling the recording and reproducing means so that the recording and reproducing means rewrites the management information.

Abstract: The present invention is to provide an apparatus for recording and/or reproducing a recording medium which comprises recording and reproducing means for recording or reproducing data on or from a recording medium in which management information for recording or reproducing data is recorded together with data, designating means for designating a pause position of one data and control means for controlling the recording and reproducing means based on the management information such that the recording and reproducing means records or reproduces data on or from the recording medium, recognizing a time point at which the designating means is operated during data is recorded on or reproduced from the recording medium by the recording and reproducing means and controlling the recording and reproducing means so that the recording and reproducing means rewrites the management information.

Abstract: A disc table employed in a disc recording/reproducing apparatus has, as a recording medium, a recording disc, such as an optical disc or a magneto-optical disc, on which information signals are pre-recorded or are to be recorded. The disc table includes a fitting member fitted from its distal end into a circular center aperture of the recording disc, a table section which is integrated to the fitting member at a proximal side of the fitting member and on which a rim portion around the center aperture of the disc is set, a thrusting and supporting unit for thrusting and supporting the recording disc with respect to the table section, and a centering unit provided at a proximal side of the fitting member and adapted for thrusting the rim portion around the center aperture of the recording disc for aligning the center of rotation of the recording disc with the center of rotation of the fitting member.

Abstract: The present invention is to provide an apparatus for recording and/or reproducing a recording medium which comprises recording and reproducing means for recording or reproducing data on or from a recording medium in which management information for recording or reproducing data is recorded together with data, designating means for designating a pause position of one data and control means for controlling the recording and reproducing means based on the management information such that the recording and reproducing means records or reproduces data on or from the recording medium, recognizing a time point at which the designating means is operated during data is recorded on or reproduced from the recording medium by the recording and reproducing means and controlling the recording and reproducing means so that the recording and reproducing means rewrites the management information.

Abstract: A disc recording and reproducing apparatus for use with a disc cartridge which includes an exterior indicator for indicating a reflectance of an optical disc housed in a cartridge body thereof, the disc recording and reproducing apparatus including a detector for detecting the exterior indicator and a setting control circuit for initially setting an output level of a laser light irradiated on the optical disc based on a detection output from the detector before beginning recording or reproducing operations.

Abstract: The present invention is to provide an apparatus for recording and/or reproducing a recording medium which comprises recording and reproducing means for recording or reproducing data on or from a recording medium in which management information for recording or reproducing data is recorded together with data, designating means for designating a pause position of one data and control means for controlling the recording and reproducing means based on the management information such that the recording and reproducing means records or reproduces data on or from the recording medium, recognizing a time point at which the designating means is operated during data is recorded on or reproduced from the recording medium by the recording and reproducing means and controlling the recording and reproducing means so that the recording and reproducing means rewrites the management information.

Abstract: A disc table employed in a disc recording/reproducing apparatus employing, as a recording medium, a recording disc, such as an optical disc or a magneto-optical disc, on which information signals are pre-recorded or are to be recorded, is disclosed. The disc table includes a fitting member fitted from its distal end into a circular center aperture of the recording disc, a table section which is integrated to the fitting member at a proximal side of the fitting member and on which a rim portion around the center aperture of the disc is set, a thrusting and supporting unit for thrusting and supporting the recording disc with respect to the table section, and a centering unit provided at a proximal side of the fitting member and adapted for thrusting the rim portion around the center aperture of the recording disc for aligning the center of rotation of the recording disc with the center of rotation of the fitting member.

Abstract: A recording apparatus is provided for recording data in a recording region of a recording medium and information representing contents of said data recorded in the recording medium. The apparatus includes: a recording system for recording the data and information in the recording medium; a non-volatile memory for storing the contents of the data recorded in the recording medium; and a controller for renewing the information and storing it in the non-volatile memory at a certain time interval, to thereby facilitate a backup system and to suppress cancellation of the recorded data even upon a power suspension.

Abstract: A disc type detection arm contacts a disc type opening formed in a disc cartridge when the disc cartridge is loaded into a recording and/or reproducing apparatus. The disc type detection arm determines the type of disc which has been loaded by the depth of the disc type opening, and controls the positioning of the magnetic head in response thereto. The magnetic head is spaced-apart from the disc when a read-only type disc is loaded, and positioned close to the disc when a read/write disc is loaded.

Abstract: A disc table employed in a disc recording/reproducing apparatus employing, as a recording medium, a recording disc, such as an optical disc or a magneto-optical disc, on which information signals are pre-recorded or are to be recorded, includes a fitting member into a circular center aperture of the recording disc, a table section which is integrated to the fitting member at a proximal side of the fitting member and on which a rim portion around the center aperture of the disc is set a thrusting and supporting unit for thrusting and supporting the recording disc with respect to the table section, and a centering unit provided at a proximal side of the fitting member and adapted for thrusting the rim portion around the center aperture of the recording disc for aligning the center of rotation of the recording disc with the center of rotation of the fitting member.

Abstract: There is provided a disc recording apparatus for recording digital data by an optical unit in such a manner that time compressed digital data are arranged into a plurality of clusters at an interval of a predetermined number of sectors, a cluster-linking sector having a length longer than an interleaving length is provided at each linking part of each cluster, and the digital data are subsequently interleaved and recorded on a disc-shaped recording medium so that interleaving at the time of data recording on the cluster-by-cluster basis is within the range of the cluster-linking sector.

Abstract: A recording apparatus for an optical disc 101 having ejection inhibiting levers 18, 19 moved at the time of starting the recording mode. These ejection inhibiting levers 18, 19 are retained in the moved position by a locking lever 23 during the recording mode for inhibiting thrusting of an ejection button 17 which may be operated for taking out the optical disc 101. After the end of recording of table-of-contents data on the optical disc 101 following recording of the information signals on the disc 101, the locking lever 23 releases the retention of the ejection inhibiting levers 18, 19 for enabling thrusting of the ejection button 17.

Abstract: A disc recording apparatus includes a base member, a cartridge holder, a magnetic head and a supporting arm. The base member has a spindle motor to rotationally drive a magneto-optical disc accommodated in a disc cartridge and an optical pickup unit for radiating at least one of light beam on the magneto-optical disc. The cartridge holder holds the disc cartridge. The cartridge holder rotatable is mounted on the base member and moved between a loading position in which the magneto-optical disc is loaded on a disc table mounted on the spindle motor and an unloading position in which the magneto-optical disc is taken out the disc table. The magnetic head generates vertical magnetic field and applies the vertical magnetic field to the magneto-optical disc. The supporting arm supports the magnetic head and is rotatable mounted on the cartridge holder to move corresponding to the movement of the cartridge holder.

Abstract: A magneto-optical positioning apparatus for synchronously positioning both a magnetic pickup device and an optical pickup device over the tracks of a disc and including an arm member, a magnetic head, a pair of parallel first support links, each of the first support links being integrally formed with and hinged at one end to the arm member and hinged at another end to the magnetic head, the first support links forming a first parallelogram linkage allowing the magnetic head to follow fluctuations of the disk in a plane perpendicular to a recording surface of the disc while maintaining the magnetic head parallel to the recording surface, a base support, and a pair of parallel second support links, each of the second support links being integrally formed with and hinged at one end to the arm member and hinged at another end to the base support to form a second parallelogram linkage for raising and lowering the arm member towards and away from the recording surface of the disk while maintaining the arm substanti

Abstract: There is provided a disc recording apparatus for recording digital data by an optical unit in such a manner that time compressed digital data are arranged into a plurality of clusters at an interval of a predetermined number of sectors, a cluster-linking sector having a length longer than an interleaving length is provided at each linking part of each cluster, and the digital data are subsequently interleaved and recorded on a disc-shaped recording medium so that interleaving at the time of data recording on the cluster-by-cluster basis is within the range of the cluster-linking sector.

Abstract: A disk recording and/or reproducing apparatus comprises external magnetic field generating means for applying an external magnetic field to a given area, of a rotating disk on which information signals are recorded; of a rotating disk; means for moving the external magnetic field generating means toward and away from the disk in response to commencing an operation of recording of the informational signals on the disk; and means for loading the disk on such a position where the informational signal can be recorded. The moving means moves the external magnetic field generating means toward the disk only when the loading operation of the disk by the loading means is completed. Accordingly, contact of the magnetic head with the disk while the disk is not rotated is prevented.