Matsushita Electric Industrial Co., Ltd.

Panasonic Corporation

Sony Corporation

Koninklijke Philips Corporation N.v.

Kabushiki Kaisha Toshiba

Matshushita Electric Industrial Co., Ltd.

Koninklijke Philips Electronics N.v.

Koninklijke Phillips Electronics N.v.

Mitsurou Moriya

Shin-ichi Tanaka

Mitsuaki Oshima

Kenji Koishi

Yoshinari Takemura

Shinichi Tanaka

Yoshiho Gotoh

Yasuhiro Sugihara

Katsuya Watanabe

Michiyoshi Nagashima

Hiroshi Taniguchi

Yasuaki Edahiro

Makoto Usui

Takeharu Yamamoto

Kouichi Takamine

Shoei Kobayashi

Hiromichi Ishibashi

Tamotsu Yamagami

Hideshi Ishihara

Aalbert Stek

Jakob Gerrit Nijboer

Susumu Senshu

Cornelis Marinus Schep

Takashi Kishimoto

Shin-ichi Yamada

Shin-Ichi Yamada

Hiroyuki Yamaguchi

Yoshihiro Kanda

Shin-ichi Kadowaki

Masaru Yamaoka

Toyoji Gushima

Norio Miyatake

Motoyoshi Murakami

Takashi Yumiba

Shinichi Konishi

Shinichi Yamada

Osamu Yamaguchi

Toshiyuki Kinou

Yoshihisa Fukushima

Koichi Hirayama

Yasuki Matsumoto

Mitsuteru Fujimoto

Namio Hirose

Kazushi Andoh

Kouichi Ikeuchi

Yoshiaki Komma

Ryusuke Horibe

Shinichi Kadowaki

Kenji Fujiune

Yuuichi Kuze

Takeo Ohta

Toshiyuki Shimada

Shunji Oohara

Motoyuki Kobayashi

Hiroyuki Miyachi

Yoshino Gotoh

Yoshiro Gotoh

Shin-iti Yamada

Shoei c/o Sony Corporation Kobayashi

Susumu c/o Sony Corporation Senshu

Tamotsu c/o Sony Corporation Yamagami

Shin-Ichi Tanaka

An optical storage medium can be provided by which illegal usage of the optical storage medium involving an infringement on the copyright can be prevented effectively without impairment of the functions for reproducing physical format information and optical storage medium manufacturing information. The optical storage medium includes a main information region in which encrypted data information is recorded as a pit row that is capable of being read out by means of light and a control data region. In the control data region, key information for decoding the encryption of the data information, the physical format information and the optical storage medium manufacturing information are recorded by wobbling a groove.

Optical storage medium, information recording apparatus, and information reproducing apparatus

An ECC block is constituted by RS(248,216,33). Of a data length of 216 bytes (symbols), only 16 bytes are allocated to BCA data and the remaining 200 bytes are used for fixed data having a predetermined value. Using the fixed data of 200 bytes and the BCA data of 16 bytes, parities of 32 bytes (symbols) are calculated. Only the BCA data of 16 bytes and the parities of the former 16 bytes of the 32-byte parities, that is, a total of 32 bytes only, are recorded in a burst cutting area of an optical disc. In decoding, error correction processing is carried out by using the fixed data of 200 bytes. The unrecorded parities of 16 bytes are processed as having been erased. Thus, the error correction capability in a burst cutting area of an optical disc can be improved.

Information recording device and method, information reproducing device and method, recording medium, program, and disc recording medium

Four ECC blocks are recorded in a burst cutting area of an optical disc. Each ECC block is constituted by a BCA content code of 1 byte, content data length of 1 byte, and content data of 14 bytes. Of the BCA content data, the leading 6 bits are used for application ID and the remaining 2 bits are used for block number. Disc ID is stored in the content data. Since the four ECC blocks exist, the optical disc can be managed individually by four applications at the maximum. Thus it becomes possible to manage the same optical disc by a plurality of applications.

Information recording disc, recording and/or reproducing device and method

The operating and other procedures of a disk or recording medium application system of the type for which a network is used are simplified. Disks or recording media have auxiliary data recording areas, where different IDs for individual disk, and/or cipher keys and/or decoding keys for ciphers are recorded in advance in a factory. By using the IDs to release the soft ciphers, and using the cipher keys when sending the ciphers, and using the decoding keys when receiving the ciphers, user authorization procedures are simplified.

Recording medium reproducer, cryptocommunication system and program license system

An ECC block is constituted by RS(248, 216, 33). Of a data length of 216 bytes (symbols), only 16 bytes are allocated to BCA data and the remaining 200 bytes are used for fixed data having a predetermined value. Using the fixed data of 200 bytes and the BCA data of 16 bytes, parities of 32 bytes (symbols) are calculated. Only the BCA data of 16 bytes and the parities of the former 16 bytes of the 32-byte parities, that is, a total of 32 bytes only, are recorded in a burst cutting area of an optical disc. In decoding, error correction processing is carried out by using the fixed data of 200 bytes. The unrecorded parities of 16 bytes are processed as having been erased. Thus, the error correction capability in a burst cutting area of an optical disc can be improved.

Optical storage medium control data region

An ECC block is constituted by RS(248,216,33). Of a data length of 216 bytes (symbols), only 16 bytes are allocated to BCA data and the remaining 200 bytes are used for fixed data having a predetermined value. Using the fixed data of 200 bytes and the BCA data of 16 bytes, parities of 32 bytes (symbols) are caculated. Only the BCA data of 16 bytes and the parities of the former 16 bytes of the 32-byte parities, that is, a total of 32 bytes only, are recorded in a burst cutting area of an optical disc. In decoding, error correction processing is carried out by using the fixed data of 200 bytes. The unrecorded parities of 16 bytes are processed as having been erased. Thus the error correction capability in a burst cutting area of an optical disc can be improved.

An optical disk apparatus comprises a focusing means for focusing a light beam on a recording medium having first and second information faces; means for moving a focal point of the light beam in a direction substantially perpendicular to the information faces of the recording medium; means for detecting a reflected light from the recording medium; means for detecting a focus condition of the light beam on the basis on an output signal from the reflected light detecting means; a focus control means for driving the focal point moving means on the basis of an output signal from the focus condition detecting means, and controlling the light beam so that the focus condition of the light beam becomes a prescribed focus condition; and a focus jumping means for moving the focal point of the light beam from the first information face to the second information face by driving the focal point moving means.

Optical disk apparatus

An optical disk that includes main information and write-once information recorded on the optical disk. The write-once information is recorded as information unique to the optical disk, and the write-once information stores at least watermark production parameters for producing a watermark.

Magneto-optical recording medium having watermark for preventing unauthorized copy

An optical recording medium is provided which includes a first substrate having a first information surface, a semitransparent reflection film formed on the first information surface of the first substrate, and a second substrate having a second information surface. In addition, the optical recording medium includes a reflection film formed on the second information surface of the second substrate, and an adhesive layer for adhering the first substrate and the second substrate so that the first information surface of the first substrate faces the second information surface on the second substrate. The thickness of the first substrate is the same as the thickness of the second substrate.

Optical recording medium having dual information surfaces

A content recording method using a communication means, including reading from a recording medium identification information unique to that recording medium, receiving through the communication means permission information for permitting recording of content on that recording medium, receiving content information through the communication means, and after confirming validity of the permission information, encrypting the received content information using both the unique identification information and a cipher key, and recording the encrypted content information on the recording medium.

Apparatus for encrypting and recording received content information on a recording medium using both medium identification information and a cipher key for encryption

Recording medium, recorder, reproducer, cryptocommunication system and program license system

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Ikoma, Japan

Mitsurou Moriya