| Sony NEC Optiarc Inc. Patent applications |
| Patent application number | Title | Published |
|---|
| 20100188953 | RECORDING/REPRODUCTION DEVICE, EVALUATION VALUE CALCULATION METHOD, AND EVALUATION VALUE CALCULATION DEVICE - In a recording/reproducing system that performs PRML decoding, a suitable evaluation value for setting a recording condition can be obtained with a simple structure. It is assumed that a value corresponding to a difference between a difference metric between a maximum likelihood path for an equalized signal that is fed to maximum likelihood decoding processing and a path in a bit-advanced shift direction and a difference metric between the maximum likelihood path for the equalized signal and a path in a bit-delayed shift direction is a signal quality evaluation value dSAM. Further, the signal quality evaluation value dSAM is calculated using an equalization error value ek which is an error between an equalized signal value fed to the maximum likelihood decoding processing and an ideal equalized signal value determined from a decoded signal obtained as a result of the maximum likelihood decoding processing. | 07-29-2010 |
| 20090193156 | PERIPHERAL DEVICE, METHOD OF OPERATING PERIPHERAL DEVICE, HOST DEVICE, METHOD OF OPERATING HOST DEVICE, AND ELECTRONIC DEVICE SYSTEM - A peripheral device is connected to a host device by a transmission path according to a predetermined interface standard to be communicable with the host device, and operates with power supply received from the host device through the transmission path. The peripheral device includes a main operation unit and a control unit. The main operation unit uses, in the operation thereof, non-standard current higher than an upper limit current value specified by the interface standard. The control unit operates in a standard power mode, which consumes current not exceeding the upper limit current value specified by the interface standard, to send the host device information indicating the use of the non-standard current, and performs, upon receipt from the host device of permission to use an extended power mode, which consumes the non-standard current, a process of activating the operation of the main operation unit in the extended power mode. | 07-30-2009 |
| 20090125925 | RECORDING MEDIUM DRIVE APPARATUS AND ELECTRONIC APPARATUS - Disclosed is a recording medium drive apparatus configured to drive a recording medium, including a case, a drive source used for loading/ejecting the recording medium into/from the case, a motor unit configured to hold the recording medium and rotate the recording medium held, a pickup unit configured to record a signal on the recording medium rotated by the motor unit or reproduce the recorded signal, a first slider driven by the drive source to slide a first distance in a first direction, a second slider that is cam-engaged with the pickup unit and slides in a second direction to move the pickup unit upward and downward, a moving member that is releasably engaged with the first slider, engaged with the pickup unit, and cam-engaged with the motor unit, and moves the motor unit upward and downward, and a link mechanism configured to link the first slider and the second slider. | 05-14-2009 |
| 20090086610 | OPTICAL PICKUP APPARATUS, OPTICAL RECORDING MEDIUM DRIVING APPARATUS, AND SIGNAL RECORDING/REPRODUCING METHOD - An optical pickup apparatus capable of irradiating an optical recording medium having a plurality of recording layers on which a signal is recorded with laser light includes a light source emitting the laser light, a light-concentrating element concentrating the laser light emitted from the light source on the optical recording medium, a phase difference element having a region divided into at least two regions which the laser light reflected by the optical recording medium enters and producing a phase difference between first light and second light reflected by a non-target layer which is not a target of recording or reproduction of the signal out of the plurality of recording layers and entering the at least two regions such that the first and the second light weaken each other, and a photodetector receiving the laser light emitted from the phase difference element. | 04-02-2009 |
| 20080310827 | INFORMATION REPRODUCTION DEVICE, REPRODUCTION STARTING METHOD AND REPRODUCTION STARTING PROGRAM - An information reproduction device sets, from among a plurality of estimated rotation speeds previously estimated, a set rotation speed in accordance with request-specification information specifying a piece of data requested by an external device and a specified rotation speed specified by the external device for a disc-shaped storage medium storing data, rotates the storage medium at the set rotation speed, reads out data from the storage medium at a readout speed that is determined by the set rotation speed of the storage medium, stores the data in a data storage section, and supplies, from among the stored data, the piece of data corresponding to the request-specification information to the external device. | 12-18-2008 |
| 20080229337 | DISK DRIVE APPARATUS AND ELECTRONIC APPLIANCE - A disk drive apparatus includes: a disk table on which a disk recording medium inserted into a disk insertion port for loading is mounted; an eject lever rotatably supported by a chassis, and having a disk holding part that holds the inserted medium; and a support lever rotatably supported by the chassis and having a disk holding part, wherein these levers are rotated between a waiting position at which the disk holding part waits for the inserted medium and a drawing position at which the medium held by the disk holding part is drawn, wherein when the eject lever and the support lever are at the waiting positions, the disk holding parts are each positioned at a position which is located more on the disk insertion port side than a centering projecting part of the disk table and is not overlapped with the insertion direction of the medium. | 09-18-2008 |
