Abstract: 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.

Abstract: A first communication apparatus executes a session control protocol thereby to determine a session identifier which identifies a session for media-related protocols for transferring the data when the session is established, and thereafter executes the media-related protocols thereby to perform communications for transferring the data on the session. A second communication apparatus executes the session control protocol thereby to establish a session for the media-related protocols with the first communication apparatus, and thereafter executes the media-related protocol thereby to perform communications for transferring the data with the first communication apparatus on the session.

Abstract: A service providing system is connected to a user terminal via a network, acquires a request message described with an upper layer protocol exceeding three layers for requesting desired data and transmitted by the user terminal, and analyzes the content of a body portion of the message. In the case where unwanted information or unusual information is contained in request content, the unwanted information or the unusual information is eliminated by subjecting the request message to a predefined process.

Abstract: A data recording device is provided to record and redistribute stream data such as TV programs without imposing loads proportional to the number of users. Stream data of a distributed program is collated by a recording range judging section 4 with data already recorded of a stream data recording section 6 and, based on results from the collation, only newly distributed data is appended to the stream data recording section. Recording demand information representing a range of stream data of a program that a user makes a request for recording is recorded in a range recording section 5 and a user identifier to identify the user is recorded in a manner to be associated with the above recording demand range information. Stream data only in a range corresponding to the above recording demand range information of the user recorded by the above demand range recording processing is read out by a redistributing section 7 from the stream data recording section 6 and is redistributed to the user.

Abstract: 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.

Abstract: It is possible to provide a personalize service for users and a personalize service for each of the terminals owned by users by considering a profile unique to each of the terminals owned by the users and a common profile of respective terminals owned by one user. In response to a service execution request from a terminal, a service is provided according to the unique profile unique to the terminal and a common profile common to all the terminals owned by the user having the aforementioned terminal.

Abstract: 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.

Abstract: A video distribution system according to the present invention includes a user terminal, an SIP session controller, and a video distribution server. When the SIP session controller receives a request to establish a session, the SIP session controller establishes a session between the user terminal and the video distribution server, and controls a bandwidth controller to reserve a bandwidth for the distribution of video content in a communication path between the user terminal and the video distribution server. The video distribution server sends a bandwidth changing request for requesting the SIP session controller to change the bandwidth to reserve a bandwidth depending on a fraction of the bandwidth that is needed for distributing video content. In response to the bandwidth changing request, the SIP session controller further secures a bandwidth for the distribution of video content in the communication path between the user terminal and the video distribution server.

Abstract: It is possible to provide a video audio stream distribution system, a distribution method, and a distribution program which can improve the stream switching speed during zapping and suppress the actually used network resource in streaming for which QoS is guaranteed. Zapping destination means (211) predicts a stream required for the next distribution request and band managing means (209) instructs only band allocation for the predicted stream to band control means (205) before a distribution request is made by an actual zapping operation.

Abstract: 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.

Abstract: 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.

Abstract: A content distribution system according to the present invention, includes a client terminal, a server, a band control mediating unit provided between the client terminal and the server, and configured to relay a reproduction control protocol data of a content data from the client terminal to the server, and a first band control unit arranged in a first network and configured to control a band on the first network. The band control mediating unit requests the first band control unit to control the band on the first network for a communication path, through which the content data is transferred, based on the reproduction control protocol data.

Abstract: A system for supporting construction of a server having a plurality of constraints determined depending on an application area of the server is disclosed. A service method definition section defines a value of each of the plurality of constraints by defining a value of each of a group of constraints to thereby determine a value of each of the other group of constraints which are related to at least one constraint of the group of constraints. A program generator generates a server construction program using the defined constraints. The server operates according to the server construction program received from the system. A simultaneous multiple-access processing server used by the interactive program, WEB shopping, and the like can be easily constructed.

Abstract: A data processing device includes means (103) for receiving a signal of an object identifier uniquely assigned to an object, and means (104) for executing a plurality of application programs corresponding to the received object identifier. A plurality of applications can be processed on the basis of an object identifier so that the operation can be simplified. When the device include a client terminal (105) and an application server (108), data processing is possible even when they are located in remote sites.

Abstract: With an operation information supplement instructing unit (16), a service progress dependent information storage unit (11), a service progress dependent information search unit (12) and a service progress dependent information answering unit (13) provided, when the operation information supplement instructing unit (16) is pressed, the service progress dependent information search unit (12) searches the service progress dependent information storage unit (11) for supplemental contents recorded in pair with the same service progress as a current service progress (information indicating how far service progresses) and presents the searched supplemental contents to a user through the service progress dependent information answering unit (13).

Abstract: A system for supporting construction of a server having a plurality of constraints determined depending on an application area of the server is disclosed. A service method definition section defines a value of each of the plurality of constraints by defining a value of each of a group of constraints to thereby determine a value of each of the other group of constraints which are related to at least one constraint of the group of constraints. A program generator generates a server construction program using the defined constraints. The server operates according to the server construction program received from the system. A simultaneous multiple-access processing server used by the interactive program, WEB shopping, and the like can be easily constructed.

Abstract: A broadcast storing and displaying apparatus including a network, a network management apparatus for managing the network, and plural types of video apparatuses connected to the network, wherein each of the plural types of video apparatuses transmits the state thereof to the network, the network management apparatus stores the states of the plural types of video apparatuses, and each of the plural types of video apparatuses inquires about the states of the other video apparatuses to the network management apparatus and then determines a video apparatus to be a communication partner on the basis of the states of the other video apparatuses which are obtained from the network management apparatus.

Abstract: A system is provided that can easily capture the same broadcast stream from an arbitrary application. An interface between application and a reception route selection mechanism describes in a unified mode a broadcast resource capture specification method and a communication resource capture specification method. The interface employs a description scheme in which an application does not recognize whether or not a broadcast stream is captured through broadcast or communication. In the reception route selection, the reception route selection mechanism checks for a broadcast time contained in the identifier of a broadcast stream to be input so that a zone where a broadcast time is earlier than the current time by using a communication resource receiver while a zone where the broadcast time is later than the current time is selected by using a broadcast resource receiver.

Abstract: An optical amplifying glass comprising 100 parts by mass of a matrix glass and from 0.1 to 10 parts by mass of Er doped to the matrix glass, wherein the matrix glass comprises Bi2O3, at least one of B2O3 and SiO2, at least one member selected from the group consisting of Ga2O3, WO3 and TeO2, and La2O3 in such a ratio that Bi2O3 is from 20 to 80 mol %, B2O3+SiO2 is from 5 to 75 mol %, Ga2O3+WO3+TeO2 is from 0.1 to 35 mol %, and La2O3 is from 0.01 to 15 mol %.

Abstract: A received broadcast data dynamic editing device for dynamically editing received broadcast data comprises a TV tuner for receiving broadcast data of one or more broadcast programs which are broadcasted by broadcast stations, an HDD for storing the received broadcast data, a modem for acquiring a script for editing the broadcast data stored in the HDD, a main memory for temporarily storing the script acquired by the modem, and a CPU for playing back the broadcast data stored in the HDD according to the script and thereby displaying the broadcast data on a video output device in the order that is designated by the script, for example. The script is, for example, data which includes information concerning playback order, a channel, actual broadcast starting time and actual broadcast ending time with respect to each broadcast data to be played back by the CPU.