Pioneer Electronic Corporation

Pioneer Corporation

Other

Adamant Kogyo Co., Ltd.

Illum Technologies, Inc.

Sony Corporation

Pioneer Electric Corporation

Pioneer Display Products Corporation

Nisshinbo Industries, Inc.

Pioneer Video Corporation

Tomy Kogyo Co., Ltd.

Pioneer Electronic Coporation

Toshio Suzuki

Kazuo Kuroda

Eiji Muramatsu

Masayoshi Yoshida

Masahiro Kato

Shoji Taniguchi

Akiyoshi Inoue

Yoshiyuki Akiyama

Shinichiro Iimura

Kunihiko Horikawa

Minemasa Ota

Shouji Taniguchi

Hiroshi Ogawa

Yuji Tawaragi

Satoshi Kusano

Noriko Obitsu

Yoshiaki Moriyama

Hiroyuki Ohira

Kazuo Saito

Kazumi Sugaya

Gregory Bunin

Yutaka Takahashi

Toshimasa Hashimoto

Akira Takaku

Shigetaka Yoshida

Takeshi Koda

Shinichi Takahashi

Masaru Sato

Nobuyuki Takakuwa

Kenichiro Tada

Tsuyoshi Hasebe

Atsushi Yamaguchi

Kyoichi Terao

Tetsuo Shimizu

Kenji Mito

Kosuke Ajima

Gregory Bunm

Jose Salzberg

Mitsuru Nishitsuka

A disc-shaped information recording medium includes a first recording layer (L0 layer) having (I) a first trial write area (P-) for trial write of first trial write information for calibration of the laser beam along the first track path (TP) from the inner circumference toward the outer circumference and (II) a first recording area for recording the first recording information along a first track path (TP), in this order from the inner circumference side. Furthermore, the disc-shaped information recording medium includes a second recording layer (L1 layer) having (I) a second trial write area (P-) for trial write of second trial write information for calibration of the laser beam along the second track path (TP) from the outer circumference toward the inner circumference and (II) a second recording area for recording the second recording information along a second track path (TP), in this order from the inner circumference side.

Information recording apparatus and method

To provide an information record controlling apparatus which can move and record recorded information more efficiently, and more efficiently administrate move and record. In the information recording and reproducing apparatus, CPUadministrates and controls recorded information, which is constituted by a plurality of information units. Further, the CPUcontrols move and record of the recorded information, which are carried out with respect to each of the information units, on the basis of reproduction able and disable information with respect to each of the information units.

Information record controlling apparatus, information record controlling method, information reproduction controlling apparatus, information reproduction controlling method, information recording medium, information record controlling program, and information reproduction controlling program

An information recording medium () is provided with a plurality of recording layers (Llayer, Llayer) to record therein record information, and property information () indicating properties of the each recording layer is recorded in each of the plurality of recording layers.

Information recording medium, information recording apparatus, and computer program

In a recording disc, a straight groove () and a position determining pit () are formed in an inner circumference area (), and a straight groove () and an over-run preventing pit () are formed in an outer circumference area (), and only a straight groove () is formed over the entire middle area ().

Recordable type information recording medium, information recording apparatus, and information recording method

An information recording medium includes: Each recording layer has a predetermined area in which power calibration is performed to detect an optimum recording power of laser light for recording, which is transmitted through the first recording layer and other layers of the second recording layers, the first recording layer, the other layers of the second recording layers, and each of the second recording layers arranged in this order as viewed from an irradiation side of the laser light, and in a facing area, which faces the predetermined area, in the other layers of the second recording layers and the first recording layer, by forming embossed pits.

Information recording medium and information recording device and method

A rotation control apparatus which can maintain an accurate rotating state even in a high density optical disk (DVD) having a structure such that parts of the sync signal are recorded at an interval different from that of the other sync signal parts. The apparatus has: a unit period signal generator for generating a period signal of a unit period; a pre-pit detector for detecting a pre-pit from the DVD; a phase difference detector for detecting a phase difference between the detection timing of the pre-pit and the unit period signal; and a holding circuit for holding the phase difference detected. The rotation of the DVD is controlled on the basis of the phase difference held at the holding circuit.

Rotation control apparatus operating with a sync signal having variable intervals

A disc-shaped information recording medium includes a first recording layer (Llayer) having (I) a first trial write area (P-) for trial write of first trial write information for calibration of the laser beam along the first track path (TP) from the inner circumference toward the outer circumference and (II) a first recording area for recording the first recording information along a first track path (TP), in this order from the inner circumference side. Furthermore, the disc-shaped information recording medium includes a second recording layer (Llayer) having (I) a second trial write area (P-) for trial write of second trial write information for calibration of the laser beam along the second track path (TP) from the outer circumference toward the inner circumference and (II) a second recording area for recording the second recording information along a second track path (TP), in this order from the inner circumference side.

Information recording medium, and information recording apparatus and method

A pit data generation circuit generates a first clock signal synchronized with pit data and a pit synchronization signal from a sum read signal obtained by reading the length of a pit. A division circuit generates a second clock signal by frequency-dividing the first clock signal. The division circuit is reset by the pit synchronization signal, and is capable of adjusting the phase of the second clock signal.

Information reproducing apparatus and method

In an electronic apparatus control system provided with: a plurality of electronic apparatuses connected to a network covering a predetermined area; and a controller for controlling these electronic apparatuses, the controller () is provided with: a generating device for generating a group key peculiar to the network () in order to encrypt the information flowing through the network (); and a wireless unit () for transmitting the generated group key to a plurality of the electronic apparatuses. The electronic apparatus is provided with: a memory device for storing the group key transmitted; an encrypting device for encrypting the information flowing through the network () using the group key; and a decoding device for decoding the encrypted information using the group key. Owing to this construction, it is possible to present a copy protection improved in the maintainability and reduced in the cost, for protecting copyright effectively even in a case that information is flown out of the network ().

Electronic device control system and method and electronic device, and control apparatus

An information recording apparatus for recording information onto an information recording medium having a plurality of recording layers, by irradiating the information recording medium with laser light for recording, the information recording apparatus including: a setting device for setting a preferable irradiation condition of the laser light which is preferable to one recording layer in which the information is scheduled to be recorded, out of the plurality of recording layers, for each recording state of another recording layer out of the plurality of recording layers; and an irradiating device for irradiating the one recording layer with the laser light in the set preferable irradiation condition.

Information recording apparatus and method, and information recording medium

On a disc master DS, a record mark having a variable length according to the first data is formed at a displaced position to which the record mark is displaced, in a direction crossing the reading direction thereof, according to a wobble signal obtained by modulating the second data in a predetermined modulating method. A second start position at which the head of the second data is recorded is away from a first start position at which the head of the first data is recorded by a predetermined value.

Information recording medium, and information reproducing apparatus and method

An information recording apparatus () is provided with: a recording device () for recording record information onto an information recording medium by irradiating the information recording medium () with laser light with a recording power according to a set value; a calculating device () for preparing correlation information which represents a correlation between the set value and reproduction quality, and for obtaining a reference set value which gives target reproduction quality as being desired reproduction quality, by reproducing test-record information recorded with changing the set value on the recording device; a measuring device () for measuring the reproduction quality, by reproducing the record information recorded by using the reference set value on the recording device; and an adjusting device () for obtaining adjustment amount of the reference set value on the basis of the correlation information if the reproduction quality measured by the measuring device is different from the target reproduction quality, and for adjusting the reference set value such that a set value which is adjusted based on the adjustment amount is to be a new reference set value.

Information recording medium, information recording device and method, information recording/reproducing device and method, and computer program

An information recording apparatus is provided with: a recording device for recording information onto an information recording medium; a detrack detecting device for detecting occurrence of detrack during the recording of the information; and a controlling device for controlling the recording device to return to a location where the detrack has occurred and restart the recording if the occurrence of the detrack is detected.

Information recording device and method, and computer program

A disc-shaped information recording medium has a first and a second recording layer. A buffer area is arranged adjacent to a recording area of each of the layers for preventing deviation of the recording position onto/from each of the layers. A first part of the information is written along a first track path on the first recording layer, a predetermined amount of first buffer data in a part of the buffer area of the first recording layer is written into the first recording layer, and inter-layer jump is performed from the first recording layer to the second recording layer. A predetermined amount of second buffer data in the buffer area of the second recording layer is written in the second recording layer and write element is controlled to write a second part of the information to be recorded, on the second recording layer by changing the recording direction.

Information recording apparatus and method, and computer program

On an optical disc, a record mark having a variable length according to pit data DP is formed at a displaced position to which the record mark is displaced, in a direction crossing the reading direction thereof, according to a wobble signal WB obtained by modulating wobble data DW in a predetermined modulating method. A second wobble synchronization signal D-SYNCw, as a dummy, is recorded on the optical disc, away from the start position of the wobble data DW.

Information recording medium having first and second synchronization signals recorded thereon, and information reproducing apparatus and method

Growing community of inventors

Saitama, Japan

Toshio Suzuki