Sony Corporation

Sony Computer Entertainment Inc.

Hideaki Ishioka

Toru Takeda

Satoru Seko

Yoshikazu Onuki

Itaru Tomisaki

Kenjiro Watanabe

Osamu Morita

Nobuhiro Hayashi

Takehisa Ishida

Takayasu Muto

Takamichi Yamakoshi

Kazushige Kawazoe

Takeshi Itagaki

Takeshi Yamagishi

Masakazu Yajima

Seiichi Misawa

Katsuhiko Nakano

Hidemi Tomitsuka

Provided is a portable electronic device including a signal processing unit, a controller that supplies a control signal to the signal processing unit, and a power generation unit that generates an electrical signal as power and supplies the generated electrical signal to the signal processing unit.

Portable electronic device, signal processing method and playback method

An information processing device, method, program, and electronic apparatus are provided for operating an information processing device without a sense of discomfort regardless of a distance between the information processing device and a user. The information processing device, method, program, and electronic apparatus detect a subject from an image and extract a feature point from the subject. The feature point is converted into a coordinate point based on a movement distance of the subject and an image distance. The image distance being a distance between the subject and where the image is captured.

Information processing device configured to detect a subject from an image and extract a feature point from the subject, information processing method, program and electronic apparatus

A head positioning control apparatus and method which compensates for positional deviation of a magnetic head with respect to the positioning of the head on a particular track of a disc recording medium via a tracking control. Additionally, during a seek mode of the apparatus, a head that was positioned as a result of the tracking control is moved to a neighboring track of the disc recording medium. The seek mode uses the information obtained during the tracking mode to correct any disturbance frequencies occurring in synchronism with the rotational frequency of the disc recording medium, even if the head travels over a large distance.

Head positioning apparatus and method therefor

A magnetic disk drive device that includes a disk-shaped medium with a magnetic film formed on a surface for recording or reproducing information, and a magnetic head for recording on and reproducing information from the disk-shaped medium. The disk-shaped medium has a data recording region and a control signal recording region. The data recording region is impressed to have convex recording regions for recording data and concave guard bands for separating adjacent recording regions. The control signal recording region has impressed concavities and convexities representing tracking marks (for effecting tracking control of the magnetic head), track number indicating marks and track numbers (for identifying the tracks), and clock marks dividing one circumference into equal intervals along a path of angular movement of the magnetic head. The disk-shaped medium has reduced track pitch and increased recording capacity because the concave guard bands can be very narrow without inducing crosstalk, and the tracking marks, track number indicating marks, and clock marks are impressed as concavities and convexities along the path of angular movement of the magnetic head.

Magnetic disk device and method of manufacturing same

A data for measuring deviation between a recording head and a playback head easily for correctly reproducing data despite such deviation. A playback signal amplitude detection circuit 23 detects the amplitude of playback signals of test data from a playback amplifier 15, while adders 51, 52 cumulatively sum the amplitude values of playback signals in a pre-set group of sectors and those in another pre-set sector of groups on a magnetic disc 21 supplied from the playback signal amplitude detection circuit 23. A subtractor 50 computes a difference between a first sum value from the adder 51 and a second sum value from the adder 52 and routes the difference to a controller 11. The controller detects deviation between the recording head and the playback head from the difference value. When recording or reproducing actual data, the controller 11 causes the position of the recording head or the playback head to be corrected on the basis of the detected deviation.

Method and apparatus for measuring head deviation and method and

Magnetic disk device and method of manufacturing same having convex

A magnetic or optical disc device which can correctly follow the eccentricity of an eccentrically chucked disk and which can immediately follow the eccentricity of the new disk face when there is a changeover of the disc being accessed operates with a disc having data tracks provided with uniformly spaced clock marks for providing a timing standard and includes a reproduction circuit for reproducing data from the disc, a clock sampling circuit for extracting a first clock signal output by the reproduction circuit, an eccentricity magnitude memory section for storing a signal corresponding to the eccentricity of the data tracks with respect to the axis of rotation of the disc; a clock correction section. The device further includes a voltage control oscillator operating according to the signal corresponding to the eccentricity for causing a second clock signal output by the voltage control oscillator to follow the first clock signal by changing the phase or the frequency of the second clock signal and an eccentricity magnitude measuring section for measuring the signal corresponding to the eccentricity from the first clock signal and the output signal of the reproduction circuit and supplying it to the eccentricity magnitude memory section.

Disc device having eccentricity measurement and clock correction

A magnetic or optical disc device that can correctly follow the eccentricity of an eccentrically chucked disc operates with a disc having data tracks provided with uniformly spaced clock marks for providing a timing standard and includes a reproduction head mounted on a turnable arm arranged for movement relative to the disc and a head traveling radial position detector attached to the arm that detects the rotational angle and produces a head position signal. A home index signal is detected and used along with the radial position signal and a derived clock signal to measure eccentricity magnitude that is stored in a memory and subsequently accessed for use in generating a control signal for a phase lock loop that provides an eccentricity adjusted clock signal.

Disc device providing eccentricity compensation using a head radial

A disc recording/reproducing apparatus includes a tracking servo system in which a recording/reproducing head is moved based upon a target position signal indicating its pre-set target position on a disc-shaped recording medium and in which the recording/reproducing head is controlled in its position by a driving unit which employs an output of a controller which is supplied with a position signal obtained by subtracting a deviation from a pre-set target position from the target position signal. The apparatus also includes an eccentricity data storage unit for storing eccentricity data indicating the tracking position of the recording/reproducing head which depends upon eccentricity of the disc-shaped recording medium. The eccentricity data from the eccentricity data storage unit is summed to the target position signal for controlling the position of the recording/reproducing head. In this manner, the current consumption when the recording/reproducing head is halted under a standby state on a pre-set track may be reduced.

Disc recording/reproducing apparatus which uses stored eccentricity data

A magnetic or optical disc device which can correctly follow the eccentricity of an eccentrically chucked disk and Which can immediately follow the eccentricity of the new disk face when there is a changeover of the disc being accessed operates with a disc having data tracks provided with uniformly spaced clock marks for providing a timing standard and includes a reproduction circuit for reproducing data from the disc, a clock sampling circuit for extracting a first clock signal output by the reproduciton circuit, an eccentricity magnitude memory section for storing a signal corresponding to the eccentricity of the data tracks with respect to the axis of rotation of the disc; a clock correction section. The device further includes a voltage control oscillator operating according to the signal corresponding to the eccentricity for causing a second clock signal output by the voltage control oscillator to follow the first clock signal by changing the phase of the second clock signal or the frequency of the second clock signal and an eccentricity magnitude measuring section for measuring the signal corresponding to the eccentricity from the first clock signal and the output signal of the reproduciton circuit and supplying it to the eccentricity magnitude memory section. The eccentricity magnitude measuring section measures the signal corresponding to the eccentricity by calculating the number of tracks which the reproduction head crosses or by using the non-uniformity of spacing observed in a string of clock pulses reproduced from the uniformly spaced clock marks on the disc.

In an apparatus for timer reservation recording, previously inputted reservations for a program are recorded in a habit database together with a degree of certainty which is reviewed according to the frequency of reservation inputting for the program. When a timer reservation is made, reservations are found in the habit database and displayed in order according to their probability of being for the same program for which a reservation is being made, thereby assisting the user to easily and positively make a timer reservation for a desired program.

Growing community of inventors

Kanagawa, Japan

Hideaki Ishioka