Sony Corporation

Sony Corporatioin

Isao Kawashima

Akira Kurihara

Yoichiro Sako

Yoshitomo Osawa

Hideo Owa

Shozo Masuda

Shigeyuki Yoneyama

Hideo Hara

Yoshimoto Omura

Kunio Fukuda

Yoshitaka Ukita

Mario Tokoro

Kuninori Shino

Masanori Kimizuka

Heitaro Nakajima

Keisuke Sekiguchi

Tokundo Yamaguchi

A signal recording/reproducing method and apparatus, signal record medium and signal transmission/reception method and apparatus, whereby a signal recorded on a signal record medium can be identified as being an original signal or a copied signal. A CPUgenerates, at a pre-set time interval, an identification signal having a meaning at a pre-set time interval, and an identification signal addition circuitadds the identification signal to the video signals and/or the audio signals. A sector forming circuitand circuit components up to a recording/reproducing headrecord the video signals and/or the audio signals and the ancillary identification signal on an optical disc

Signal recording/reproducing method and apparatus, signal record medium and signal transmission/reception method and apparatus

Users at a terminal are able to select network data using multiple, independently operated, cursors. These cursors include pointing devices, such as a mouse, a data tablet or other mechanism that selects data displayed on a terminal interface device. Decision logic may be used to determine which user has priority access when selected network content is desired by more than one user. This decision logic may be based on a user identity, terminal location, number of users at a terminal or other factors.

System and method for accessing data using a plurality of independent pointing devices

A signal transmission method applicable to prevention of modification or alteration of the playback mode information, such as copying management information or charging information. The playback mode information form a terminal is data-converted for ciphering by a playback mode information appendage circuit in a header appendage circuit responsive to the key information from a terminal and the resulting information comprised of the data and the playback mode information is outputted. The reproducing side effects data conversion on the ciphered playback mode information for deciphering, by a playback mode information detection circuit in a header separation circuit, using the key information from a terminal, for taking out the original playback mode information at a terminal.

Method and apparatus for ciphering playback mode information for recording on record medium

A data transmitting method, a data recording apparatus, a data record medium and a data reproducing apparatus are provided to disallow the encryption to be easily decoded and keep the secrecy of key information higher. The data transmitting apparatus includes an error correction coding process block. In the block, an input converting circuit operates to perform a logic operation with respect to the information data from an interface circuitaccording to the key data. The converted information data is sent to an encoderfor generating parity data. This parity data is mixed with information data before conversion in a mixing circuit. The error correction coding block operates to send the resulting data to a modulating circuitfor modulating the data. The modulated data is recorded on a disk record medium.

Method for transmitting data, apparatus for recording data, medium for recording data, and apparatus for reproducing data

A data recording apparatus capable of preventing easily copying of information is disclosed with which, even if information is copied, the copied information cannot be reproduced, the data recording apparatus having a terminal to which encoder ID specific for the data recording apparatus is input, a recording unit for recording at least the encoder ID on an optical disk, and an encoding circuit for, in accordance with the encoder ID, encoding data supplied through a terminal and required to be recorded so that encoded data is, together with the encoder ID, recorded on the optical disk.

Method and apparatus for transmitting and receiving a decoding key encoded with specific information to decode encrypted information of a record medium

An input is ciphered in at least one of a sector forming circuit, a scrambling circuit, a header appendage circuit, an error correction encoding circuit, a modulation circuitand a synchronization appendage circuit, used for processing input data for forming a recording signal. Not only key for ciphering itself in the circuits but also the information as to which of the circuits has been used for ciphering becomes the key for ciphering. This realizes ciphering difficult to decode by a simplified structure.

Data recording method and apparatus, data record medium and data reproducing method and apparatus

A data recording apparatus capable of preventing easily copying of information is disclosed with which, even if information is copied, the copied information cannot be reproduced; the data recording apparatus having a terminal to which encoder ID specific for the data recording apparatus is input, a recording unit for recording at least the encoder ID on an optical disk, and an encoding circuit for, in accordance with the encoder ID, encoding data supplied through a terminal and required to be recorded so that encoded data is, together with the encoder ID, recorded on the optical disk.

A signal transmission method applicable to prevention of modification or alteration of the playback mode information, such as copying management information or charging information. The playback mode information form a terminalP is data-converted for ciphering by a playback mode information appendage circuitin a header appendage circuitresponsive to the key information from a terminalK and the resulting information comprised of the data and the playback mode information is outputted. The reproducing side effects data conversion on the ciphered playback mode information for deciphering, by a playback mode information detection circuitin a header separation circuit, using the key information from a terminalK, for taking out the original playback mode information at a terminalP.

A data reproducing apparatus and method is provided for reproducing data that was ciphered during recording in one or more of sector forming, header appending, error correction coding, modulation, and synchronization appending operations used for processing input data to form a recording signal. Thus, deciphering requires knowledge of both the ciphering key and the aspect(s) of the recording operation in which the ciphering took place. The deciphering may also include a descrambling operation in which an initial value and/or a generating polynomial is varied in accordance with ciphering key information.

Method and apparatus for reproducing ciphered data

A radio communication CPU controls each section of a radio communication device included in a short distance radio communication network by using network setting information in a network setting storage section. A connection relation with a communication network (for example, the Internet) is set and transmission/reception of data to/from equipment included in the communication network via the short distance radio communication network is controlled. Thus, the network setting or the like for connecting to the Internet or the like is simplified for each portable equipment existing in the short distance radio communication network.

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Kanagawa, Japan

Isao Kawashima