Pioneer Corporation

Pioneer Electronic Corporation

Memory-tech Holdings Inc.

Pioneer Electric Corporation

Pioneer Digital Design and Manufacturing Corporation

Pioneer Electronic Coporation

Masayoshi Yoshida

Takeshi Koda

Keiji Katata

Kazuo Kuroda

Toshio Suzuki

Masahiro Kato

Yoshitaka Shimoda

Tsuyoshi Hasebe

Eiji Muramatsu

Shoji Taniguchi

Masahiro Miura

Naoharu Yanagawa

Akira Imamura

Toshiro Tanikawa

Shinji Suzuki

Hideki Kobayashi

Makoto Suzuki

Masakazu Ogasawara

Akira Shimizu

Eisaku Kawano

Shinichi Nagahara

Takao Tagiri

Hiroshi Suzuki

Ichiro Higuchi

Shigetaka Yoshida

Takuya Shiroto

Takao Sawabe

Hidehiro Ishii

Masanori Nakahara

Nobuyuki Takakuwa

Masaru Ishikawa

Yuji Tawaragi

Tsuyoshi Namiki

Tetsuo Shimizu

Kenji Mito

Motoji Nakamura

Tetsuaki Kawahara

A recording medium is provided with: a guide layer on which a guide track or tracks are formed; and a plurality of recording layers, wherein a same mark group is formed in a same rotational phase position of each of a plurality of guide tracks which are included in a beam spot of guide laser light, the mark group including a pair of record marks which are shifted by a predetermined distance toward a right side and a left side, respectively, from a track center.

Recording medium

A recording medium is provided with: a guide layer on which a guide track or guide tracks are formed; and recording layers, wherein (i) an information mark group and (ii) a distinctive mark group are formed in the guide layer, the information mark group being formed on each of a plurality of guide tracks, the distinctive mark group distinguishing a center track out of the plurality of guide tracks on each of which the information mark group is formed, the distinctive mark group including a pair of distinctive record marks which are shifted toward a right side and a left side, respectively, from a track center of the center track, a width of each distinctive record mark is twice or more a width of the guide track.

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

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

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

An information recording medium (), provided with: a first recording layer (Llayer) and a second recording layer (Llayer) in each of which record information can be alternately recorded, at least one of the first recording layer and the second recording layer provided with: an anchor area (AP#to) which is to record therein anchor information (VRS, AVDP, VAT_ICB) and which is referred to in reading file system information () for controlling at least one of recording and reproduction of the record information; and an update area to update and record therein the anchor information.

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

An information recording medium () is provided with (i) a read only area (ROAand the like) whereupon read only information is previously recorded by forming embossed pits; (ii) a data area () wherein recording information can be recorded; (iii) a first management area (CDZ) wherein first position information () relating to the position of the read only area is previously recorded by forming embossed pits; and (iv-1) a second management area (RMA) wherein second position information () can be recorded in addition to the first position information or (iv-2) a second management area wherein second position information can be recorded as substitute for the first position information. The second position information relates to the position of a rewrite prohibited area (RWROA) wherein rewriting of a part of or the entire recording information is prohibited in the data area.

Information recording medium, information recording apparatus and method, and information reproducing apparatus and method

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

An information recording apparatus comprising: a writing device capable of writing record information onto an information recording medium comprising first and second recording layers; a first controlling device for controlling said writing device to continuously write the record information into the first and second recording layers; a second controlling device for controlling said writing device to write a predetermined amount of buffer data on an outer circumferential side of the record information written in the first and second recording layers; and a third controlling device for controlling said writing device to add buffer data on an outer circumferential side of the predetermined amount of buffer data.

Information recording device and method, and computer program

An information recording device can record a plurality of pieces of recording information, for instance, at different times, in an information recording medium provided by stacking first and second recording layers. A writing control element controls a writing element so that each piece of the information can be written over the first recording layer to the second recording layer. Furthermore, a boundary control member controls the writing element so that first boundary information is written in a recording area which is to be a boundary between the pieces of information in the first recording layer, and that second boundary information is written or ensured, in a recording area of a second recording layer which overlaps the recording area wherein the first boundary information of the first recording layer is written, as a recording area to be a boundary between the pieces of information in the second recording layer.

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.

Disclosed is an information recording medium () comprising a first recording layer (L0 layer) which is provided with a first recording track for recording record information, and a second recording layer (L1 layer) which is provided with a second recording track for recording record information. Each recording zone (zone #n) including one recording area in the first recording layer and another recording area in the second recording layer which is opposite to the recording area in the first recording layer has a management information recording area (RMA) for recording management information (RMD) for recording the record information.

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

An information recording apparatus () is provided with: a first recording device () for recording user data into a user data area () provided for an information recording medium (), with a data area attribute added; and a second recording device () for recording a marker () following an end edge portion of the recorded user data, with a predetermined flag bit set to a first value and with the data area attribute added, the flag bit indicating at least whether or not the marker is recorded.

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

A recording apparatus includes: a recording device for recording record information onto at least one of (i) a recording medium including: a first recording layer and a second recording layer in which the record information is recorded by irradiating laser light thereon, each of the first and second recording layers including a buffer area and a calibration area, and (ii) a recording medium including: the first recording layer and the second recording layer, each of the first and second recording layers including the calibration area; a setting device for setting a reserved area having a predetermined size for extending or generating the buffer area, by each recording unit in the calibration area; a calibrating device for calibrating the power by using the calibration area other than the set reserved area; and a controlling device for controlling the recording device to record the record information into at least the reserved area.

Recording 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.

Growing community of inventors

Tokorozawa, Japan

Masayoshi Yoshida