Matsushita Electric Industrial Co., Ltd.

Panasonic Corporation

Sony Corporation

Koninklijke Philips Corporation N.v.

Omron Tateisi Electronics Co.

Koninklijke Philips Electronics N.v.

Panasonic Intellectual Property Management Co., Ltd.

Koninklijke Philips Electronic N.v.

Hideshi Ishihara

Mitsuaki Oshima

Hideki Fukuda

Hiromu Kitaura

Makoto Tatebayashi

Haruo Yamashita

Toshihisa Nakano

Takahiro Nagai

Yasuki Matsumoto

Motoji Ohmori

Toshiyuki Kawara

Takashi Yumiba

Shoei Kobayashi

Makoto Usui

Tamotsu Yamagami

Mitsurou Moriya

Aalbert Stek

Jakob Gerrit Nijboer

Susumu Senshu

Cornelis Marinus Schep

Tomoyuki Okada

Yoshihiro Mori

Kazuhiro Tsuga

Kazuhiko Nakamura

Hiroshi Hamasaka

Takumi Hasebe

Mamoru Shoji

Hiroyuki Yamaguchi

Harumitsu Miyashita

Naoki Yamamoto

Rie Takahashi

Tsumoru Fukushima

Natsume Matsuzaki

Kaoru Murase

Kaoru Yokota

Masaru Yamaoka

Masayuki Kozuka

Takashi Ishida

Masaya Yamamoto

Yoshihisa Fukushima

Motoshi Ito

Shinichi Tanaka

Atsushi Nakamura

Yasumori Hino

Tomoki Ogawa

Yuji Takagi

Shunji Harada

Shunji Ohara

Yoshihiro Mushika

Hiroshi Sugimoto

Shigeo Sakaue

Susumu Maruno

Ryoji Suzuki

Kenzo Ishibashi

Kenji Muraki

Koichi Morioka

Kazuo Mikami

Yoshitaka Mitsui

Seisuke Hinoda

Tadashi Jahana

Hirofumi Ide

Masahiro Nishimura

Noriyuki Tsukiyama

Yoshitaka Mitui

Hidenori Kurioka

Hitosi Naitoh

Kouhei Nakata

Hiroshi Nakamoto

Satoshi Yoneda

Hideki Matsushita Electric Industrial Co Fukuda

Shoei c/o Sony Corporation Kobayashi

Susumu c/o Sony Corporation Senshu

Tamotsu c/o Sony Corporation Yamagami

A high resolution video signal is divided by video division means into a main signal and a sub signal, and the main signal and the sub signal are MPEG-encoded. The stream of the main signal and the stream of the sub signal are divided into 1 GPO or more of frames. First interleave blocks each including 1 GOP or more of the stream of the main signal and second interleave blocks each including 1 GOP or more of the stream of the sub signal are recorded on an optical disk. A high resolution reproduction apparatus reproduces both the first and second interleave blocks to obtain a high resolution video output. A non-high quality picture reproduction apparatus reproduces only the first or second interleave blocks to obtain a standard resolution video output.

Optical disk for high resolution and general video recording, optical disk reproduction apparatus, optical disk recording apparatus, and reproduction control information generation apparatus

The present invention has an objective of providing an optical disk having a high resolution picture and a system for reproducing data on the optical disk, which are compatible with a conventional system for reproducing an ordinary resolution picture. A high resolution signal is divided into a main signal and a sub signal by picture division means and MPEG-encoded. The main signal and the sub signal are divided into frames each having 1 GOP or more. The resultant first interleave blockand second interleave blockare recorded alternately on an optical disk. A high resolution reproduction apparatus reproduced both the first and second interleave blocks, so that a high resolution picture is obtained. A non-high resolution reproduction apparatus reproduces only the first or second interleave block, so that an ordinary resolution picture.

Optical disk for high resolution and three-dimensional video recording, optical disk reproduction apparatus and optical disk recording apparatus

The present invention provides an information embedding apparatus that is capable of preventing playback stop of a content that has been shot without intention of misuse. The information embedding apparatus comprises: an acquisition unit operable to acquire the content that is played back along the playback time-line; a watermark generating unit operable to generate the watermarks such that values held by the watermarks vary according to a first rule, the first rule showing that the values should vary according to a sequential order on the playback time-line; and an embedding unit operable to embed two or more of the watermarks into the content while keeping the sequential order.

Information burying device and detecting device

A high resolution video signal is divided by video division means into a main signal and a sub signal, and the main signal and the sub signal are MPEG-encoded. The stream of the main signal and the stream of the sub signal are divided into 1 GOP or more of frames. First interleave blocks each including 1 GOP or more of the stream of the main signal and second interleave blocks each including 1 GOP or more of the stream of the sub signal are recorded on an optical disk. A high resolution reproduction apparatus reproduces both the first and second interleave blocks to obtain a high resolution video output. A non-high quality picture reproduction apparatus reproduces only the first or second interleave blocks to obtain a standard resolution video output.

A key distribution system distributes key data for using content to a second encryption device that has been legitimately outsourced processing by a first encryption device. The first encryption device acquires permission information indicating that the first encryption device has permission to use the content, generates certification information by making an irreversible alteration the to permission information, and transmits the permission information and the certification information to the second encryption device. The second encryption device receives the permission information and the certification information, sends them to a key distribution device, and acquires the key data from the key distribution device. The key distribution device receives the permission information and the certification information, judges whether or not the certification information was generated by the by the first encryption device, and if judging in the affirmative, transmits the key data to the second encryption device.

Encryption device, key distribution device and key distribution system

The present invention has an objective of realizing compatibility of an optical disk having a high resolution video signal recorded thereon and a system for reproducing the optical disk, with a conventional system for producing a standard resolution video signal. A high resolution video signal is divided by video division means into a main signal and a sub signal, and the main signal and the sub signal are MPEG-encoded. The stream of the main signal and the stream of the sub signal are divided into 1 GOP or more of frames. First interleave blockseach including 1 GOP or more of the stream of the main signal and second interleave blockseach including 1 GOP or more of the stream of the sub signal are recorded on an optical disk. A high resolution reproduction apparatus reproduces both the first and second interleave blocks to obtain a high resolution video output. A non-high quality picture reproduction apparatus reproduces only the first or second interleave blocks to obtain a standard resolution video output.

A content protection system prevents illegal key acquisition, without checking uniqueness of device keys. The content protection system includes a key data generation apparatus and a user terminal. The key data generation apparatus converts first key data, which is for using content, based on a predetermined conversion rule, thereby generating second key data, encrypts the second key data using a device key held by valid terminals, and outputs the encrypted key data. The user terminal obtains the encrypted key data, decrypts the encrypted key data using a device key held by the user terminal, thereby generating second key data, converts the second key data based on a re-conversion rule corresponding to the conversion rule, thereby generating the first key data, and uses the content with use of the generated first key data.

Content protection system, key data generation apparatus, and terminal apparatus

A content reproduction apparatus () which reproduces digital contents, and includes a device key storage unit () holding a device key () specific to the content reproduction apparatus () in a manner that does not allow access from outside the content reproduction apparatus (). The content reproduction apparatus (), also includes a device ID storage unit () holding device key index information () that is in a one-to-one association with a device key (), an instruction code receiving unit () receiving an instruction code to output index information, a device key index information obtainment processing unit () outputting, to outside, the device key index information () stored in the device ID storage unit () based on the instruction, and a device key index information output processing unit ().

Content reproduction apparatus

Growing community of inventors

Katano, Japan

Hideshi Ishihara