摘要:
In an optical disk apparatus, by obtaining the temperature in the vicinity of a laser in the apparatus, the power source voltage of the laser driver is controlled such that power consumed by the headroom of the laser driver is reduced to the maximum extent without deteriorating the current drive characteristic of the headroom when the temperature becomes higher. The laser driving current of the laser driver is monitored to control the power source of the laser driver such that the power consumed by the headroom is possibly reduced while maintaining the current drive characteristic of the headroom for the monitored current.
摘要:
The present invention has an object to stably reproduce wobble signals of all disks of CD-R/RW, DVD-R/RW and DVD-RAM by one wobble signal reproducing circuit. In the wobble signal reproducing circuit, an AGC (AUTOMATIC GAIN CONTROL) circuit for equating a push-pull circuit output of a wide range and an RF amplitude of an optical detector output of two systems obtained by push-pull, and an AGC circuit for making a wobble amplitude uniform are provided with a function to hold a gain or to change over a response time constant, and an address information recording region (PID region) at the time of reproduction, the AGC (AUTOMATIC GAIN CONTROL) is held or the response time constant is changed over.
摘要:
In playing back data in an optical disk device, to perform high-speed data playback with a low number of playback retries even if an error occur when data is being read. In reading data composed of ECC blocks, if a data error occurs during a read operation, the data from sectors for which PI error correction can be performed is left alone. Playback retries using different playback conditions are performed just on the sectors for which PI error correction can be performed. Thus, the playback retry count can be reduced.
摘要:
In a system recording compressed video and audio signals or computer user data on a disk in the sector unit, to reproduce the data in a simple fashion at a high speed, data to be recorded on the disk is divided into data in a predetermined unit so as to add a first error correction (C1) code to each of the resultant data, which form (C1) correction blocks. Sectors are produced each including a plurality of (C1) correction blocks. Added to each (C1) correction block is a code enabling identification of a sector. To all data in the plural (C1) correction blocks, a second error correction (C2) code is added to record the resultant data on the disk to allow interleaving or deinterleaving completing in a block. The capacity of each sector is set to be substantially equal to that of a plurality of transport packets.
摘要:
A disk reproducing apparatus is provided which can cope with the intermittent access due to track jump in the conventional CD reproducing system and which can reproduce data at N times the normal speed and produce the reproduced data at the normal speed. The disk reproducing apparatus includes a memory for storing the data and time information reproduced from the disk to match with each other, another external memory, a detection circuit detecting the time difference between the finally produced output data and the data which is being accessed, and a control circuit detecting the overflow/underflow of the external memory and controlling it to be written. The construction can absorb the time difference between the system operation speed and data output speed even during an intermittent access so that continuous data can be produced.
摘要:
A disk apparatus for use in a disk cartridge system including different types of disk cartridge. The disk cartridge system has a first disk cartridge and a second disk cartridge. The first disk cartridge including a first case having a substantially rectangular shape with first, second, third and fourth edges, and at least one of a first groove in both of the second and third edges, and a first cutout portion in both of the second and third edges and passing through a thickness of the first case. The second disk cartridge includes a second case having a substantially rectangular shape with fifth, sixth, seventh and eighth edges, the fifth edge of the second case being delimited by a fifth corner portion connecting the fifth edge and sixth edge, and at least one of a second groove located in only one of the sixth and seventh edges and a second cutout portion located in both of the sixth and seventh edges without passing through a thickness of the second case. A length, width and thickness of the first case are substantially equal to a length, width and thickness of the second case and a diameter and thickness of the first disk are substantially equal to a diameter and thickness of the second disk. The disk apparatus having a discrimination arrangement which discriminates at least one of the groove and the cutout portion.
摘要:
A disk reproducing apparatus is provided which can cope with the intermittent access due to track jump in the conventional CD reproducing system and which can reproduce data at N times the normal speed and produce the reproduced data at the normal speed. The disk reproducing apparatus includes a memory for storing the data and time information reproduced from the disk to match with each other, another external memory, a detection circuit detecting the time difference between the finally produced output data and the data which is being accessed, and a control circuit detecting the overflow/underflow of the external memory and controlling it to be written. The construction can absorb the time difference between the system operation speed and data output speed even during an intermittent access so that continuous data can be produced.
摘要:
In a system recording compressed video and audio signals or computer user data on a disk in the sector unit, to reproduce the data in a simple fashion at a high speed, data to be recorded on the disk is divided into data in a predetermined unit so as to add a first error correction (C1) code to each of the resultant data, which form (C1) correction blocks. Sectors are produced each including a plurality of (C1) correction blocks. Added to each (C1) correction block is a code enabling identification of a sector. To all data in the plural (C1) correction blocks, a second error correction (C2) code is added to record the resultant data on the disk to allow interleaving or deinterleaving completing in a block. The capacity of each sector is set to be substantially equal to that of a plurality of transport packets.
摘要:
Provided is a molecular imprint polymer that is capable of acquiring stealth properties through a new mechanism. The molecular imprint polymer according to the present invention, which has a plasma protein recognition sites molecularly imprinted by a plasma protein thereon and contains a constituent derived from a biocompatible monomer, is an in vivo stealth nanoparticle to be used in intravascular delivery. As the plasma protein, albumin is preferred. When carrying a drug thereon, the in vivo stealth nanoparticle according to the present invention is usable as a drug for drug delivery system.
摘要:
In a 360-degree toothbrush in which a brush head is formed by superposing disk-shaped radial vanes 1 in an axial direction, the arranging pitch of the radial vanes 1 is increased so as to make the bristle density appropriate. Spacers are not used between the radial vanes 1 so as to increase the productivity, and to improve the hygiene condition. In order to realize these aspects, an annular protrusion or protrusions 3 are formed on one or both of the surfaces of an annular weld portion 2 of the radial vane 1. The annular protrusion 3 is formed at the same time when forming the weld portion 2 in a welding step in which the bristle bundle is opened radially and the center part is welded so that the radial vane 1 is manufactured.