Pioneer Corporation

Nec Corporation

Masahiro Miura

Masahiro Kato

Eisaku Kawano

Shoji Taniguchi

Tohru Kanegae

Eiji Muramatsu

Takeshi Koda

Masayoshi Yoshida

Keiji Katata

Kyusho Omori

Tatsuhiro Yone

Akira Shirota

Tsuyoshi Hasebe

Kazuo Kuroda

Masatsugu Ogawa

An information recording medium () is provided with: a data recording area () to which one attribute, which corresponds to recorded data, of a plurality of types of attributes is given in each of segmentized area units; and an address recording area () to record therein an address (AD-, AD-) of an edge portion on an outermost side of a recording area, which is a continuous recording area to which a data area attribute of the plurality of types of attributes is given and which is a recording area closest to an edge portion on an innermost side of said data recording area, the data area attribute indicating a status that user data is recorded as the data.

Information recording medium, information recording apparatus and method, and computer program

An information recording apparatus () is provided with: a recording device () for recording data onto an information recording medium () being provided with a first recording layer (L) and a second recording layer (L); a first controlling device () for controlling the recording device to record the data into each of the first recording layer and the second recording layer; a forming device () for forming a compatibility area () for realizing reproduction compatibility of the information recording medium on an information recording apparatus, following the data recorded in each of the first recording layer and the second recording layer; and a second controlling device () for controlling the recording device to record the data into the formed compatibility area if the data is recorded after the compatibility area is formed.

Information recording apparatus and method, computer program

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

An information recording apparatus is for recording user data and recording management data onto an information recording medium being provided with: a first recording layer; and a second recording layer, each of the first recording layer and the second recording layer having a user data area to record therein at least the user data and a recording management area to record therein at least the recording management data for managing recording of the user data, the information recording apparatus is provided with: a recording device for dividing the recording management area into a plurality of recording management segments and for recording the recording management data into at least one of the plurality of recording management segments; and a first controlling device for controlling the recording device to dispose each of the plurality of recording management segments in a single recording layer.

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

A recording device has a recording unit for recording information in a medium having a first layer and a second layer; a forming unit for forming a buffer area in each of the first and second layers; and a control unit for controlling the forming unit to form the buffer area in the first layer to have a prescribed size and an edge on an outer circumference side of the buffer area in the second layer at a position, shifted from an area section of the second layer corresponding to the edge on the outer circumference side of the buffer area by a relative positional shift between an address at a prescribed position in the first layer and an address relating to the prescribed position in the second layer, or at a position shifted by a tolerance length indicating a tolerance range of such positional shift.

Recording device, 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

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 optical disk () comprises recording management areas () in which record management data for managing data recording is recorded. The record management data includes (i) physical position information () indicating the positions of physical buffer areas in which buffer data for buffering recording operation is physically recorded and (ii) logical position information () indicating the position of a logical buffer area in which buffer data is logically recorded or to be recorded.

Optical recording medium having physical and logical position information of buffer areas

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 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

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Saitama, Japan

Masahiro Miura