Sony Corporation

Yasuaki Honda

Norifumi Kikkawa

Tatsuya Igarashi

Takehiko Nakano

Kazuhiko Takabayashi

Yoichi Kobori

Takehiko Morita

Koichi Tanaka

Hiroaki Kitano

Seiji Miyama

Yuichi Kageyama

Noriyuki Sakoh

Masahiro Hara

Nobuyoshi Tomita

Junichi Nakata

Kei Yamashita

Gen Hamada

Akikazu Takeuchi

Toshiaki Kusakabe

Yasuo Endo

An information processing unit includes an application data receiving buffer to temporarily store data transmitted from a client device for initiating a connection, an application data receiving section to acquire the data transmitted from the client device from the application data receiving buffer and transmit the data to an upper layer application, and a flow control reception management section to transfer the data transmitted from the client device to the application data receiving buffer and monitor a free space in the application data receiving buffer and supply a data size receivable by the application data receiving buffer to the client device.

Information processing unit, information processing method, client device and information processing system

An apparatus and method that, in transmission and playback of content between a server and a client, efficiently executes playing back part of content, such as an impressive portion, is provided. By setting index information as partial data region identification information in property information corresponding to content retained by the server, when a content request from the client includes partial playback specification information, the index information is acquired from the property information corresponding to the specified content, and the content is acquired and transmitted to the client. This configuration enables the client to enjoy playback of content of only particular partial data such as an impressive portion of content received from a server or a user's favorite portion.

Information processing apparatus, information processing method, and computer program

There is provided an information processing apparatus including a search processing section for causing a transmission/reception section to execute processing of transmitting a search request including a search condition to each of one or more information management devices, causing the transmission/reception section to execute processing of receiving, as a response to the search request and from each of the one or more information management devices via a network, content information corresponding to the search condition from among pieces of content information and management subject identification information for identifying the information management device which manages the content information, and correlating the management subject identification information with content identification information and content-related information that are included in the content information received by the transmission/reception section and causing a storage section to store the correlated management subject identification information, content identification information, and content-related information as a search result.

Information processing apparatus and information processing method

In a metadata collection system comprising a plurality of content management servers each capable of managing content and content metadata as local content and managing content metadata stored in another content management server as reference content and a metadata collection apparatus connected with the plurality of content management servers to collect metadata from the plurality of content management servers, the metadata collection apparatus collects metadata from the individual content management servers based upon server information held at the content management servers and category identifiers appended to tree structures generated at the content management servers by individually referencing the plurality of content management servers.

Metadata collection system, content management server, metadata collection apparatus, metadata collection method and program

In view of the fact that devices connected on a home network are located in home, that is, at close range and therefore a user can physically access the devices within a relatively short period of time, identifying whether or not a home server for distributing the contents and a client terminal using the contents are connected to the same home network based on whether or not they can share access to the same physical medium within a short period of time. The authenticity of devices connected on a home network connected to an external network via a router is authenticated.

Device-to-device authentication system, device-to-device authentication method, communication apparatus, and computer program

There are provided an apparatus and method that generate a MAC list that serves as an access control list efficiently without burdening a user. A MAC list registration processing request packet is automatically transmitted by using as a trigger either a power-on process of the power source of a client apparatus connected to a network or an activation process of a specific application, e.g., an execution application for services using a home network. A server performs a registration process by acquiring information such as a MAC address from the received packet in accordance with a state of empty slots in the MAC list. According to this configuration, it is possible to easily and correctly generate the MAC list, which serves as the access control list, without burdening a user.

Information processing device, server client system, method, and computer program

In view of the connection of a home network to an external network via a home router, using a mechanism that access from the same network is provided with a source MAC address whereas a source address field is rewritten to a MAC address of the router in the case of external access via the router, whether or not access is made from the home network is automatically identified by comparing a MAC address of a device on the other side of communication with a MAC address of the home router. It is capable of suitably managing so that a client terminal uses the contents legitimately acquired on a home server within the scope of private use allowed by the copyright law.

Inter-device authentication system, inter-device authentication method, communication device, and computer program

An apparatus and a method which enable to execute different access controls based on setting modes are realized. A MAC address table in which a manually registered client MAC address and an automatically registered client MAC address are registered in forms to be able to distinguish each other is set. If an access control mode is an automatic registration access control mode, a MAC addresses of an access requesting client is registered until the number of the MAC address reaches a defined limit number of registration: N of the MAC address table, and the access is allowed under the condition of the registration; or if the access control mode is a registered device access control mode, the access is allowed under the condition that the client MAC address is registered in the MAC address table as the manually registered MAC address.

Information processing device, access control processing method, and computer program

A method of minimizing the volume of communication necessary for displaying moving images is disclosed. When an object is moved on a client terminal, a message indicating the movement of the object is transmitted to a server terminal. The server terminal transmits the message to other client terminals. Each of the client terminals stores a message table in advance to execute the message. According the message table, an image for locally moving a particular object, for example, is generated and displayed. This novel setup transmits information about the update of an updated object composed of a plurality of sub objects each of whose state is subject to change, in a minimum transmission volume. This, in turn, allows cooperative operations of the plurality of sub objects to be smoothly displayed in a three-dimensional virtual reality space shared by a plurality of users.

Method and system for three-dimensional virtual reality space sharing and for information transmission

A cyber-space system comprising one or more cyber-spaces for providing predetermined information, and user terminals for receiving provision of the predetermined information by accessing the cyber-space, wherein the cyber-space includes information objects for providing information to the user terminals, user objects corresponding to the user terminals, and a conversion object disposed between the information object and the user object, and capable of converting a terminal manipulation message from the user object into an information access message and supplying the converted message to the information object. The conversion object is further capable of converting an information content message from the information object into information corresponding to the capacity of the user terminal and providing the converted information to the user terminal. In this system, the conversion object provides the information content message to the user object when this message represents renewal of the information of the user object. The conversion object is prepared per kind or version of the cyber-space.

Cyber space system for providing a virtual reality space formed of three

The dynamic control of object identification codes involved in the customization of virtual reality space objects, such as object addition and deletion, by users is facilitated. Each of client terminals 13-1 through 13-3 sets given local IDs obj101 through obj103 for a cylindrical object, a quadrangular prism object, and a conical object independently of the other client terminals. Tables T131 through T133 are registered in a server terminal 11-1 beforehand for the client terminals 13-1 and 13-3 respectively. The tables T131 through T133 each list the relationship between local IDs obj101 through obj103 of the objects controlled by the corresponding client terminal and the global IDs objA through objC controlled by the server terminal 11-1. Use of these tables T131 through T133 allows the client terminals 13-1 through 13-3 to separately set, add or delete the local IDs obj101 through obj103.

Three-dimensional virtual reality space sharing method and system using

According to the cyberspace system of the present invention, a virtual reality space to be supplied to a user's terminals is constructed by information objects for supplying information and user objects for accessing the information objects to receive the information, and each of the information object allows an access of each of the user objects when F(Si, Su) is true: Si represents a status of the information object, Su represents a status of the user object and F represents a function for determining allowance or disallowance of the access to the information object.

Cyberspace system for accessing virtual reality objects

Terminals 2-1 to 2-3 and a host computer 1 have client programs A to D of a basic function for outputting characters representing text data entered thereto to their own display units and transmitting the characters to other apparatuses for displaying them therein. When a new function is added, a client program E providing the new function is newly incorporated in the host computer 1. When text data is entered to, for example, the terminal 2-1, the client program E determines whether or not the entered text data includes specific text data which is defined in advance. If the specific text data is included, processing associated with the specific data is executed and results obtained from the execution are passed to the client program D to be transmitted to the terminals 2-1 to 2-3. In this way, a new function can be added with ease without modifying the basic function.

Growing community of inventors

Chiba, Japan

Yasuaki Honda