Nippon Telegraph and Telephone Corporation

Akihito Akutsu

Yoshinobu Tonomura

Atsushi Nakadaira

Shigeru Fujimura

Junichi Kishigami

Yukinobu Taniguchi

Hiroki Watanabe

Takashi Satou

Yasuhiko Miyazaki

Hiroshi Hamada

Tomokazu Yamada

Yasuhiro Niikura

Kenichi Minami

Kiyoshi Tanaka

Hiroki Shigeyoshi

Kento Miyaoku

Atsushi Shimizu

Shinji Fukatsu

Haruhiko Kojima

Gen Suzuki

Hisako Shiohara

Tsutomu Sasaki

Tomio Kishimoto

Takashi Satoh

Takahisa Taura

Syunsuke Doi

HIroki Watanabe

A user terminal generates a first key pair and a second key pair, transmits a permission request including a public encryption key of the second key pair after electronically signing the permission request with a secret encryption key, and acquires, from permission information transmitted from a right-holder terminal, a content decryption key by using a secret decryption key of the second key pair and uses the content. The right-holder terminal stores a third key pair and the content decryption key, verifies the permission request received, and encrypts the content decryption key by using the public encryption key of the second key pair included in the permission request and transmits the permission information including the encrypted content decryption key after electronically signing the permission information with a secret encryption key of the third key pair. The permission request and the permission information are transmitted and received via a blockchain.

User terminal, permission information management method, and permission information management program

Right holder terminal, permission information management method, and permission information management program

The blockchain generation apparatusincludes: a parameter calculatorthat identifies a parameter type to be used for linkage of the new block, based on block approval method data, and calculates a value for the identified parameter type based on transaction datasets which are related to an identifier of a generating party; a block generation condition checkerthat determines whether the generating party is qualified to generate the new blockchain data, based on the value calculated by the parameter calculator; and a blockchain generatorthat tries to generate the new blockchain by referring to the shared data when the block generation condition checkerdetermines that the generating party is qualified. An identifier of the blend pattern included in the block approval method dataspecifies a combination of the plurality of parameter types that conflict with each other.

Blockchain generation apparatus, blockchain verification apparatus, and program

Permission information management system, and permission information management method

Blockchain generation apparatus, blockchain generation method, blockchain verification apparatus, blockchain verification method, and program

Methods, systems, and devices for leaving evidence of a contract on a blockchain with a simple method while having agreements made among the involved parties, maintaining the mode of one electronic signature per transaction, and maintaining credibility. Transactions of an issuing-party terminal, an agreeing-party terminal, and an agreeing-party terminal involved in contract agreement are linked as a chain, and the agreeing-party terminal at the end generates a transaction directed to the issuing-party terminal who has issued the contract. Each of these terminals previously generates a key pair for encryption of the contract and transmits the encryption key to a terminal which is its transaction sender. Then, this sender terminal encrypts a contract to be included in a transaction of the user of the sender terminal using the encryption key of the receiver of the transaction.

Contract agreement method, agreement verification method, contract agreement system, agreement verification device, contract agreement device, contract agreement program and agreement verification program

The blockchain generation apparatusincludes: a synchronizerthat acquires shared datawhich includes the blockchain dataand transaction datasetsnot included in the blockchain data; a transaction pattern count calculatorthat calculates the number of transaction patterns for a generating party using the blockchain generation apparatus, based on the transaction datasets which are in the blockchain dataand are related to an identifier of the generating party; a block generation condition checkerthat determines whether the generating party is qualified to generate the new blockchain data, based on the number of transaction patterns calculated by the transaction pattern count calculator; and a blockchain generatorthat tries to generate the new blockchain by referring to the shared dataif the block generation condition checkerdetermines that the generating party is qualified.

A token type content providing system is provided, in which the system includes a portable user terminal and a linkup server, the portable user terminal includes: a part for obtaining a token from an information notification medium; a part for sending the token to a linkup server; and a part for receiving content information; the linkup server includes: a part for determining one or more content identifier corresponding to the token by using a token table database; a part for obtaining one or more items of content information corresponding to the one or more content identifier; a part for selecting one or more items of content information by referring to the attribute information, and sending a part or the whole of selected content information to the portable user terminal.

Token type content providing system and token type content providing method and portable user terminal

A technology is provided for a viewer of broadcast information or recorded information to easily obtain information related to the broadcast information or recorded information from a server, in which, in a system in which a viewer apparatus and a content providing server for providing content information related to video or voice are connected via a network, the viewer apparatus obtains related information necessary for obtaining the content information; sends the related information to the content providing server so as to request the content providing server to send the content information; and obtains the content information sent from the content providing server.

Method, system, and apparatus for acquiring information concerning broadcast information

Pop-up display information is created and displayed in a dynamic manner even without establishing settings in advance related to pop-up display for an anchor or an icon or the like, and implementing simple and efficient browsing by a user of linked contents by varying the display size in accordance with the display region. Mouse events of a mouse cursor upon a screen of an information device by the user are observed, and the fact that the mouse cursor has entered into a region of an object which has a linked destination is detected from the mouse events; a new window is displayed upon the screen; linked contents which are connected to the object are acquired; contents for presentation are created based upon the linked contents which have been acquired; and they are displayed within the new window which has been displayed upon the screen.

Linked contents browsing support device, linked contents continuous browsing support device, and method and program therefor, and recording medium therewith

A scheme for graphical user interface using a polygonal-line-shaped slider that enables a user to intuitively manipulate-and playback spatio-temporal media data such as video data and animation data without deteriorating the temporal continuity of the data in interactive manipulation and playback of the spatio-temporal media data is disclosed. In this scheme, the slider is composed of a polygonal line composed of at least one segment and a coordinate indicator that is moved along the polygonal line. Data corresponding to coordinates specified by the coordinate indicator is entered. The apparatus according to present invention stores the coordinates of vertexes of the polygonal line, stores input coordinates, maps the input coordinates onto a point on the polygonal line, and positions the coordinate indicator at the point.

Scheme for graphical user interface using polygonal-shaped slider

A camcorder operation condition detecting portion ( ) reads image data string and detects camcorder on/off information and camcorder operating information. A video splitting portion ( ) splits videos into respective shots based on the camcorder on/off information. A subject/background separating portion ( ) separates a subject and a background based on the camcorder operating information, etc. A subject motion information extracting portion ( ) correlates subject information separated every frame between frames. A video taken space resynthesizing portion ( ) resynthesizes video taken spaces based on the camcorder operating information and the background. A shot-to-shot relation calculating portion ( ) calculates spatial shot-to-shot relations between a plurality of video taken spaces. Hence, respective information of camcorder on/off, camcorder operation, subject, subject motion, resynthesized background, and shot-to-shot relation information can be spatio-temporally managed/stored, and the video taken spaces and one or more subjects can be resynthesized, displayed, or output in accordance with user's requests, etc.

Method of spatio-temporally integrating/managing a plurality of videos and system for embodying the same, and recording medium for recording a program for the method

A scheme for interactive video manipulation and display of a moving object on a background image is disclosed. In this scheme a background image stored in a background image storage unit is read out and displayed on a screen, and a manipulation target spatial position is set on the screen. Then, a partial image to be synthesized and displayed is uniquely specified from partial images which are set in correspondence to spatial positions on the background image and representing an object moving on the background image, according to the manipulation target spatial position set by the setting step, and the partial image as specified by the specifying step is read out from a partial image storage unit, and synthesized and displayed at the manipulation target spatial position on the background image. A scheme for realizing a variable speed video playback with a playback speed different from a normal one is also disclosed.

Scheme for interactive video manipulation and display of moving object on background image

A video caption detection scheme capable of detecting captions from the coded video data which are coded by using a combination of predictive coding and motion compensation, without requiring the decoding of coded video data into frame images. In this video caption detection scheme, whether each pixel/block in the video data is coded by using inter-frame correlation without using motion compensation or not is judged. Then, a region in the video data at which pixels/blocks that is judged as being coded by using inter-frame correlation without using motion compensation are concentrated time-wise and space-wise, is detected as a caption region. The detection can be realized by counting a frequency of appearance of a pixel/block which is judged as being coded by using inter-frame correlation without using motion compensation, at each pixel/block position of a frame over a prescribed counting period, and then comparing the counted frequency of appearance with a prescribed threshold value.

Growing community of inventors

Yokosuka, Japan

Akihito Akutsu