Sony Corporation

Sony Group Corporation

Satoru Higashino

Toshihiro Horigome

Akira Suzuki

Naofumi Goto

Yoshihide Shinpuku

Junichi Horigome

Hiroyuki Ino

Junya Shiraishi

Yuuichi Suzuki

Mitsugu Imai

Yoshiyuki Kajiwara

There is provided a recording medium, a recording apparatus, a recording method, a reproducing apparatus, and a reproduction method that make it possible to correctly reproduce multilevel codes recorded at high density. A multilevel code of at least three ML values produced by coding user data into a (d,k)-RLL code of the ML values and a particular pattern of the ML values that includes a run of repeated codes which is greater than a maximum run k of the multilevel code are recorded on a recording medium. In addition, reproduction is performed from the recording medium, and the multilevel code is decoded according to the particular pattern. For example, the present technology can be applied to a recording medium, a recording/reproducing apparatus that performs recording on and reproduction from the recording medium, and the like.

Recording medium, recording apparatus, recording method, reproducing apparatus, and reproduction method

There is provided a signal processing device, a signal processing method, and a program capable of improving noise resistance in high linear density recording. Partial response (PR) equalization of a reproduced signal of multilevel codes of 3&#x3c;=ML is performed and maximum likelihood decoding of an equalized signal obtained through the PR equalization is performed. The present technology can be applied to, for example, a recording/reproducing device or the like such as an optical disc.

Signal processing device, signal processing method, and program

There is provided a recording apparatus, a recording method, a reproduction apparatus, a reproduction method, a recording medium, an encoding apparatus, and a decoding apparatus which enable recording or reproduction to be easily implemented at high line density. User data is encoded into a multilevel edge code, and a multilevel code whose value changes in accordance with the multilevel edge code is recorded. The multilevel edge code is generated through state transition of a code generation model which includes a state representing the number of times that zero is consecutive corresponding to a number of ways of the number of times that zero is consecutive, which is the number of times that an edge of 0 is consecutive among edges representing a change amount from an immediately preceding value of the multilevel code of an ML value which is equal to or greater than 3, and which transitions to a state representing the number of times that zero is consecutive including 0 in a case where 0 is output, and transitions to a state representing that the number of times that zero is consecutive is 0 times in a case where one of 1 to ML&#x2212;1 is output.

Recording apparatus, recording method, reproduction apparatus, reproduction method, recording medium, encoding apparatus, and decoding apparatus

There is provided a disk-type recording medium, a recording apparatus, a recording method, a reproducing apparatus, and a reproducing method, which are capable of recording, for example, data with high density and reproducing data recorded with high density robustly. In the disk-type recording medium, synchronization patterns for synchronization are recorded in two adjacent tracks with a shift in a track direction so that positions in the track direction do not overlap. The present technology can be applied to, for example, optical discs, other disk-type recording mediums, and the like.

High density recording medium, recording apparatus, recording method, reproducing apparatus, and reproducing method in which synchronization patterns are recorded with a shift so that positions in a track direction do not overlap

There is provided a signal processing apparatus and a signal processing method capable of allowing data recorded at a high density to be robustly reproduced. A frame sync (FS) is restored by performing maximum likelihood decoding of the FS according to a time-varying trellis with a state and a state transition being limited according to a time, in maximum likelihood decoding of a reproduction signal reproduced from a disk-shaped recording medium, the FS representing a head of a frame, the FS of the frame being arranged at the head of the frame, the FS being recorded at the same positions in a track direction in two adjacent tracks.

Signal processing apparatus and signal processing method

Provided is an optical information recording medium including: a continuously wobbling groove formed in advance by a CAV or a zone CAV. Information is allowed to be recorded on the groove and a land adjacent to the groove, address information is recorded by modulating the wobble, the address information includes a sync pattern indicating a position of the address information and address data, and the sync pattern includes a plurality of first wobble patterns and a second wobble pattern between the first wobble patterns, and at least part of intervals of the first wobble patterns are set to unequal intervals.

Optical information recording medium and optical information recording medium reproducing device

Data detection capability is improved by whitening crosstalk noise from an equalization signal and detecting binary data. Each of a plurality of detection signals is input to one of a plurality of adaptive equalizers, and outputs of the plurality of adaptive equalizers are computed to obtain an equalization signal for returning light at the time of shining of light onto bounds including a target track subject to data detection and adjacent tracks of an optical recording medium having a plurality of tracks formed thereon. Crosstalk noise from the adjacent tracks included in the equalization signal obtained by this multi-input adaptive equalization process is whitened first, followed by a binarization process. Also, an equalization error is found, and supplied as a control signal for adaptive equalization. Further, a whitening factor updating process is also performed to adaptively update a filter factor of a whitening filter.

Data detection device, playback device, and data detection method

An acceleration sensation presentation apparatus includes: a frame to be worn on the head of a user; at least one or more weights provided to the frame; and a vibration driving unit configured to vibrate the weight to be moved.

Acceleration sensation presentation apparatus, acceleration sensation presentation method, and acceleration sensation presentation system

A data processing device includes a signal processing unit that performs timing recovery of sampling timing, in such a manner that a sampled value is obtained at sampling timing which is set as a target by phase interpolation processing according to a feed-forward control, with respect to sampling data which is obtained from a recovery signal.

Data processing device, data processing method, and recovery device

An information recording medium is provided with an information track formed thereon in a shape of concentric circles or in a spiral shape, wherein a continuously-wobbling groove in which information is recorded is formed in advance, the information is delimited by a predetermined number of wobble sections, a sync mark is placed in a plurality of wobble sections in the vicinity of a delimiter of the predetermined number of wobble sections, and the sync mark is spaced apart from data other than the sync mark at a distance.

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

Provided is a recording device, including a light irradiation/receiving unit that irradiates an optical recording medium with first light and second light, and that receives backpropagating light of the second light from the optical recording medium, a recording unit that carries out recording on the optical recording medium, a playback signal generating unit that obtains a playback signal of a signal, and a stray light signal component canceling unit that generates, based on recording data, a stray light cancel signal for canceling a stray light signal component.

Recording device and stray light signal component cancellation method

An encoding device for converting m-bit data words into n-bit (both n and m are integers and 2&#x2267;2&#xd7;2) code words includes a first encoding table in which 2code words selected from the 2n-bit code words correspond to 2m-bit data words, a second encoding table in which 2code words, which do not overlap with the code words in the first encoding table, of the 2n-bit code words correspond to 2m-bit data words, and an encoding unit which selects and outputs a code word, in which an absolute value of a code string DSV is smaller, from code words corresponding to the input m-bit data words in the first encoding table and code words corresponding to the input m-bit data words in the second encoding table.

Encoding device, encoding method, recording device, recording method, optical recording medium, decoding device and decoding method

A coding apparatus includes a transform table in which with regard to data words of m bits and code words of n bits where n and m are both integers and also n&#x3e;m is established, 2pieces of code words selected to have a tendency that the number of symbols '1' is small among the 2pieces of code words of n bits are associated with the 2pieces of data words of m bits and a coding unit that encodes input data words of m bits on the basis of the transform table.

Coding apparatus, coding method, recording apparatus, recording method, decoding apparatus, and decoding method

An encoding apparatus that converts m-bit data words into n-bit code words, where m and n are both integers and satisfy an expression 2&#x2267;2&#xd7;2, includes a first conversion table in which 2m-bit data words are associated with 2n-bit code words selected from 2n-bit code words, a second conversion table in which the 2m-bit data words are associated with 2n-bit code words that have been selected from the 2n-bit code words and that do not overlap with the 2n-bit code words in the first conversion table, and an encoder configured to select and output an n-bit code word with which an m-bit data word that has been input is associated in the first conversion table or an n-bit code word with which the m-bit data word that has been input is associated in the second conversion table, the selected and output n-bit code word having a smaller number of symbols '1'.

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Tokyo, Japan

Satoru Higashino