Sony Corporation

Sony Disc & Digital Solutions Inc.

Takashi Kihara

Yoichiro Sako

Tatsuya Inokuchi

Shunsuke Furukawa

Akiya Saito

Yoriaki Kanada

Yoshinobu Usui

Toru Aida

Tatsushi Sano

Toshihiko Senno

Yoshiro Miyoshi

Tomihiro Nakagawa

Kaoru Kijima

Yoshimasa Utsumi

Mamoru Akita

Kazuko Sakurai

Mitsuru Toriyama

Shinichi Kazami

Toyokazu Noda

Takamasa Yamagishi

According to the type of each of a plurality of external input interfaces, it is decided whether digital watermark information is to be detected from data entered via the external input interface. Digital watermark information is not detected from data entered via the external input interface and from which it has been decided not to detect any digital watermark information, but the data is recorded. Thus, there can be provided a data recording apparatus which is not applied with a any heavy load owing to the omission of any unnecessary detection of digital watermark information.

Apparatus for, and method of, recording/playing audio data having additional information embedded therein

The present invention provides an optical disc recording method of irradiating an optical beam to an optical disc including a basal plate made of synthetic resin which has a concavo-convex pattern formed in advance on one surface thereof, and a reflective coat made of metal which is formed over the concavo-convex pattern on the basal plate, to physically change the concavo-convex pattern so as to record identification data.

Optical disc, optical disc recording apparatus and method, optical disc reproducing method

Data areas ARand AR, lead-in areas LINand LIN, and lead-out areas LOUTand LOUTare provided on a disc. For example, in case of encrypting and recording data into the data area AR, copyright management information Rand key information Kare recorded into the lead-out area LOUT. Only information in a Q channel of a subcode is recorded in the lead-out area and this area is filled with dummy data. A position of the lead-out is obtained from TOC information. The fact that a light spot has entered the lead-out area can be judged from the information in the Q channel. The copyright management information and key information are recorded by using the lead-out area. The lead-out area is not rewritten or accessed by an ordinary CD player, so that the copyright management information and the key information can be safely held.

Recording apparatus and method, reproducing apparatus and method, and memory medium

Data is arranged to one block obtained after a CIRC process so that a predetermined data pattern is recorded into a predetermined portion on a disc. By tracing back an encoding step of a Cross-Interleave Reed-Solomon Code (CIRC), a layout of recording data of one block before the CIRC process for allowing the predetermined data pattern to be recorded into the predetermined portion is obtained. An error correcting process of a CD-ROM mode 1 is executed. If a position of a parity coincides with data for forming the predetermined data pattern, a value of user data of an encoding sequence to form the parity is changed. After error correction encoding of a CD-ROM is executed, encoding of the CIRC is executed to the recording data of one block.

Data recording method and device

A method for processing content data includes the steps of, when content data is transmitted from a data provider, adding usage rule information prescribing a rule of usage of the content data to the content data and transmitting the content data with the usage rule information; receiving the transmitted content data; extracting the usage rule information from the received content data; and notifying a user of the content data of the extracted usage information.

Content providing system, content providing method, content processing apparatus, and program therefor

A recording medium including an area in which data that has been encoded with a first error correction code is recorded. Data that can be decoded with a second error correction code that is different from the first error correction code is recorded to the area along with the data that has been encoded with the first error correction code. The data that can be decoded with the second error correction code composes at least part of encryption key data.

Recording medium, recording method and apparatus, reproduction method and apparatus, data transmission method, and data demodulation method

The present invention provides a DSV normal controller and a DSV special controller. In only a predetermined region designated on an optical disc, the DSV special control is performed. The DSV special control causes the absolute value of the DSV to increase so that data will be prevented from being normally reproduced. The normal control causes the absolute value of the DSV to converge at 0. When data is reproduced from the optical disc, if the reproduction state of the predetermined region is abnormal, it is determined that the disc is an original disc. An encryption key can be recorded in the predetermined region.

Data recording method and device, data recording medium, data reproduction method and device

A data recording and/or playing method for recording or playing data to or from an optical disc having a first recording area, where a frame sync signal and the data are recorded, and a second recording area, where a predetermined pattern is preformed, and having address data recorded therein, while rotating the optical disc by a rotation drive unit. The optical disc rotated by the rotation drive unit is scanned by a head unit, and when the head unit is scanning the first recording area, the rotation drive unit is controlled in a first rotation control mode. When the head unit is scanning the second recording area, the rotation drive unit is controlled in a second rotation control mode.

Optical disc recording and/or playing apparatus and method

The present invention is relative with a method for recording further data on a recording medium on which there re pre-recorded data obtained on modulating M-bit data to N-bit data, where M&#x3c;N. The further recorded data are recorded by changing a certain bit or bits of the N-bit data, with the remaining portion of the bits of the N-bit data being fixed.

Data recording method recorder and data reproducing method and device

A recording method for converting m-bit data into n-bit (where n&#x3e;m) bit data whose run length is restricted and recoding the converted data on a recording medium, the recording method comprising the steps of when at least preceded data is data containing a special data pattern, lightening the restriction of the run length; and recording data so that the cumulative value of DC components per unit time increase when the data is reproduced in the state that the run length is restricted.

Data recording medium, and data recording method and device

A recording method for converting m-bit data into n-bit (where n&#x3e;m) data whose run length is restricted and recording the converted data on a recording medium, the recording method comprising the step of selecting first n-bit data according to an immediately preceded n-bit data, first n-bit data immediately followed thereby, and second n-bit data immediately followed thereby so that the cumulative value of DC components per unit time becomes small.

Data recording medium, data recording method and device, and encode method and device

A recording method includes the steps of generating recording data in such a manner that, when m-bit data is converted into a data symbol of n bits (m&#x3c;n), and connection bits such that the summed value of DC components per unit time decreases are selected from among a plurality of connection bits and are added after the m-bit data symbol, the connection bits differing from connection bits which are added when the n-bit data symbol is a data symbol other than the special data symbol are added to generate recording data; and recording the generated recording data on a recording medium.

Data recording apparatus and associated methodology of affecting a digital sum variance

Optical discs on which enciphered data is recorded include first recording areas, where enciphered contents data is recorded, and second recording areas provided at the position where a read-out operation is carried out ahead of the first recording areas and including a first area portion, where cipher key data for decoding enciphered contents data is recorded, and a second area portion, where identification data for identification of the recording medium modulated by a modulation system different from that of at least the first area portion is recorded.

Data recording medium, recording medium recording and/reproducing apparatus, and recording or reproducing method

A recording method, wherein, when a certain portion of main data is recorded by being encoded by a first encoding method and the other portions of the main data is recorded by being encoded by a second encoding method, an encoding process is performed by the first encoding method so that, when data which is recorded in such a manner that the data encoded by the first encoding method is decoded by a decoding method corresponding to the first encoding method, and thereafter, is further encoded by the second encoding method, is decoded by a decoding method corresponding to the second encoding method, the sum value of DC components per unit time increases.

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Chiba, Japan

Takashi Kihara