Pioneer Corporation

Pioneer Electronic Corporation

Nec Corporation

Eisaku Kawano

Masahiro Kato

Masahiro Miura

Tohru Kanegae

Eiji Muramatsu

Shoji Taniguchi

Tsuyoshi Hasebe

Seiji Ohmori

Kyusho Omori

Tasuku Tsuruga

Takeshi Mawatari

Takao Sawabe

Masayoshi Yoshida

Masanori Nakahara

Akira Shimizu

Tatsuhiro Yone

Akira Shirota

Yuji Shimizu

Hiroshi Otsubo

Takashi Irisawa

Takahiro Horiuchi

Shinji Suzuki

Naoharu Yanagawa

Hidehiro Ishii

Masatsugu Ogawa

Kunihiko Horikawa

Akiyoshi Inoue

Tadashi Noguchi

Yoshitaka Shimoda

Masahiro Nakajima

Jiro Endo

Hiroshi Suzuki

Tetsuo Shimizu

Hiroshi Ohtsubo

An optical disc () is provided with a recording region where prescribed clock information (WBL) is preformatted for recording. The clock information is (i) included in a first frequency band that is definable by a first reference frequency (Fstd) (that is impossible for a conventional reproducing device to detect by a detecting method based on a self-correlation) and is (ii) defined by a frequency that is integer times the first frequency.

Information recording medium in which groove tracks are wobbled by frequency 2n times wobble frequency of standard

Information recording medium in which one land pre-pit is formed in each group unit of wobbles formed by each 'N' cycles of wobbles

A recording apparatus with a device for recording information onto a medium, provided with: (i) a first layer irradiated with laser light to record information on a first area; and (ii) a second layer irradiated with laser light through the first layer and having a second area whose edge on an inner circumferential side corresponds to an edge on an outer circumferential side of the first area; and a controlling device for controlling the recording device to pre-record, into an area portion of the first area, other than an area portion having a size corresponding to a tolerance length, which indicates an acceptable range of a relative position shift between an address defined on the predetermined position in the first layer and an address related to the predetermined position in the second layer, with the edge on the outer circumferential side of the first area as a starting point.

Recording device, recording method, and computer program

A recording medium () is provided with: a first recording layer (L0) and a second recording layer (L1) to record therein record information, and a control area () in said recording layer and a control area in said second recording layer to record therein control information for controlling at least one of recording and reproduction of the record information, wherein a distance between an inner radius of the control area in the first recording layer and an outer radius of the control area in the second recording layer is larger than or equal to a first predetermined value.

Recording medium, recording method, and computer program

An information recording medium () is provided with: a first pre-recording area, in which reproducible preformed information including physical address information is recorded in advance and in which preformed address information assigned in advance is not recorded;

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

An information reproducing apparatus () is provided with: a detecting device () for irradiating an information. recording medium with laser light (LB) and detecting reflected light as a detection signal, the information recording medium including a first recording layer (L0) and a second recording layer (L1); a high pass filter () for performing a filtering process on the detected detection signal; and a reproducing device () for performing a reproduction process of the filtered detection signal to reproduce the data, the high pass filter attenuates a fluctuation component of the detection signal, caused by a relative eccentricity between the first recording layer and the second recording layer, by a first attenuation amount (34dB) or more.

Information reproduction device

An information recording medium is provided with: a first recording layer in which one portion of record information including predetermined data can be recorded, the predetermined data being (i) capable of setting a recording layer close to a physically or optically recorded state, and (ii) capable of setting the recording layer close to a buffer state for finalizing; and a second recording layer in which another portion of the record information can be recorded by laser light transmitted through the first recording layer, the information recording medium is provided with a management area in which management information can be recorded, the management information including (iii) identification information indicating whether or not there is a predetermined data recording area in which the predetermined data can be recorded, (iv) position information of the predetermined data recording area, and (v) attribute information of the predetermined data recording area.

Information recording medium, apparatus, and method, using dummy data in dummy data recording area

In an information recording medium including at least a first recording layer (Llayer) capable of recording information and a second recording layer (Llayer) capable of recording information, an information recording device () records information in a predetermined area () of the second recording layer by a laser beam which has passed through a transmission area () of the first recording layer. The information recording medium () includes recording means (, etc.) for recording the information in the first recording layer or the second recording layer, judgment means for judging whether an unrecorded amount indicating the size of the unrecorded area in the radial direction in the transmission area is smaller than a predetermined amount, and control means used when the unrecorded area is judged to be smaller than the predetermined amount, for controlling the recording means to record information in the predetermined area.

Information recording device and method, and recording control computer program

An information recording medium is provided with: a recording layer (L0 layer, L1 layer) having one or a plurality of predetermined recording areas (CDZ,and the like) in which record data including buffer data in a finalizing process can be recorded; and a management area (CDZ) in which the management information () can be recorded, the management information including first identification information () for identifying whether or not embossed pits are formed in the predetermined recording area.

Information recording medium, apparatus, and method using management information identifying whether or not embossed pits are formed in a predetermined recording area

A recording medium () is provided with: a first recording layer (L0) including a first area; and a second recording layer (L1) including a second area, wherein an edge on one side of the second area is located at a position obtained by shifting to an other side at least by a tolerance length from an area portion in the second recording layer corresponding to an edge on the one side of the first area, or an edge on the other side of the second area is located at a position obtained by shifting to the one side at least by the tolerance length from the area portion in said second recording layer corresponding to the edge on the one side of the first area, in which the tolerance length indicates an acceptable range of a relative position shift between an address which is defined on the predetermined position in the first recording layer and an address which is related to the predetermined position in the second recording layer.

Recording medium, recording apparatus and recording method, and computer program

An information recording apparatus () is provided with: a first recording device (etc.) for recording the first information into a first area of the first layer; a second recording device (etc.) for recording the second information into a predetermined area of the second layer; and a controlling device () for controlling the second recording device to record the second information by the laser light, while displacing an edge indicating an innermost or outermost circumference of the predetermined area in which a penetrated area penetrated by the laser light is included in the first area, in a direction to approach an edge of the predetermined area in which the penetrated area is not included in the first area, only by a predetermined length corresponding to a tolerance of a change amount indicating a change in the reproduction quality.

Information recording apparatus and method, and computer program for recording control

An information recording apparatus includes: a transferring device that separately and simultaneously receives at least two information supplied through at least two channels, and separately and simultaneously transfers the at least two information to a storing device at separate transfer rates, thereby storing the at least two information into the storing device; a recording device that alternately reads the at least two information from the storing device, and alternately records the at least two information read from the storing device onto a recording medium at a constant recording rate; and a transfer rate setting device that sets the respective transfer rates to make a total of the transfer rates smaller than the recording rate.

Information recording apparatus with memory control structure

An information recording medium () includes (i) a first recording layer (L0 layer) having a first track and (ii) a second recording layer (L1 layer) having a spiral or coaxial second track sharing the rotation center with the first track. (iii) The first recording layer has a first point (point Bx) indicated by a first address. (iv) The second recording layer has a second point (point Dx) which can be defined according to a predetermined positional relationship (allowable area:) with respect to the first point (point Bx).

Efficient recording of information on an information recording medium having a plurality of layers

A position verifying apparatus is provided with: a first recording device for recording the information into a first area of the first recording layer; a second recording device for recording a part of the information by laser light which has penetrated the first area and for recording another part of the information by laser light which does not penetrate the first area, into a second area of the second recording layer including at least a partial area which faces the first area; a reproducing device for reproducing the information; and a judging device for judging whether or not the relative shift is within tolerance, on the basis of a transit position at which reproduction quality transits from the reproduction quality indicated by the part of the information reproduced to the reproduction quality indicated by the another part of the information reproduced.

Position verifying apparatus and method, position measuring apparatus and method, and computer program for position verification or position measurement

The present invention provides an information recording method and an information recording apparatus, which are capable of recording reproduction controlling information in information recording medium such as DVD. An operation portion designates a division timing in the audio information in case of dividing continuous audio information to record it in the DVD. A pickup records the audio information before the designated division timing and the audio information after the designated division timing in the DVD. A system controller repeats generating object recording sequence information in associated with the audio information before and after the division timing, respectively, to record them in the DVD every time when the division timing is designated.

Growing community of inventors

Saitama, Japan

Eisaku Kawano