Nec Corporation

Motonobu Kimura

Shuhei Miura

Kaname Naito

Akira Kobayashi

Katsuhiro Ochiai

Junichi Sato

Junichi Gokurakuji

Takashi Okazaki

Koichi Nihei

Motohiro Suzuki

Kaori Sugiyama

A processing state management apparatus to be connected to a distribution server that carries out a transaction to register or delete content to be distributed, includes a transmitter which transmits a request requesting the distribution server to carry out the transaction, and a state updater which, after the processing state management apparatus has requested the distribution server to carry out the transaction, holds state information indicative of the state of the transaction in the distribution server as representing processing in progress until the processing state management apparatus receives a notification of completion of the transaction from the distribution server.

Processing state management device, processing state management method, and program

A service provider server has management means which manages a user ID corresponding to a service user and a device IDs corresponding to an information processing terminals of the service user in association with each other.

Server, authentication server, content delivery system, and program

A content distribution system. A distribution management and unauthorized operation management device generates a one-time URL by using URL of content information specified by a user terminal and transmits the one-time URL and bandwidth information concerning the content information to the user terminal. A session control server extracts the one-time URL from a session control message transmitted from the user terminal, transmits it to the distribution management and unauthorized operation management device, and establishes a session between the content distribution server and the user terminal according to an authentication result performed by using the one-time URL transmitted from the distribution management and unauthorized operation management device and a correlation result obtained by correlating the bandwidth information contained in the session control message transmitted from the user terminal with the bandwidth information transmitted together with the authentication result from the distribution management and unauthorized operation management device.

Content distribution system, content distribution method and program

A video and audio stream is predicted that is to be selected for reception next to a video and audio stream that is being received by the terminal or that is after a video and audio stream that has been selected for reception by the terminal. Resources necessary for delivering the predicted video and audio stream, in addition to resources necessary for the video and audio stream that is being received by the terminal or that has been selected for reception by the terminal, are secured in advance before a user of the terminal selects the next video and audio stream. The predicted video and audio stream is not delivered to the terminal before it coincides with a video and audio stream that is selected at the next zapping.

Method of securing resources in a video and audio streaming delivery system

The present invention aims to realize a system and method of reliably performing multicast communication via a bandwidth-guaranteed network, and provides a multicast communication system for performing multicast communication via a bandwidth-guaranteed network, the system including: a multicast proxy response device added with a group address destination identifier; and a multicast client, wherein the multicast proxy response device transmits a session connection request to the group address destination identifier of the multicast proxy response device when starting reception, the multicast proxy response device which has received said session connection request transmits a session connection response to said multicast client, and the multicast client receives multicast data through a bandwidth secured in the bandwidth-guaranteed network by the session connection response.

Growing community of inventors

Tokyo, Japan

Motonobu Kimura