Abstract:
A multicast data communication system is provided that has high security, and prevents problems such as an attack by a malicious user creating a great number of meaningless tables at nodes in the network. Clients regularly transmit request packets toward a server; a node receives the request packet, and subsequently receives a delivery-table-creation packet or a delivery packet from the server; if the node has no delivery table corresponding to the server, the node creates the delivery table, registers the addresses of the clients, and their request packet arrival times, and regularly transmits the request packet toward the server; when the node has received a delivery packet from the server, the node duplicates and delivers the delivery packet only to those clients whose request packet arrival times, registered in the delivery table, are within a fixed period from the arrival of the delivery packet.
Abstract:
A control system includes a receiver configured to receive information relating to starting or ending a call between a first communications terminal and a second communications terminal while a session, which is for sending content data between the first communications terminal and the second communications terminal, is established; and a transmitter configured to send, to the first communications terminal, control information for starting output of content based on content data sent from the second communications terminal, in response to receiving the information relating to starting the call by the receiver, and to send, to the first communications terminal, the control information for stopping output of the content based on the content data sent from the second communications terminal, in response to receiving the information relating to ending the call by the receiver.
Abstract:
An information processing apparatus includes: a transmitter to transmit content data to one or more counterpart information processing apparatuses through a network to have a communication with the one or more counterpart information processing apparatuses, the content data being at least one of image data and audio data; a receiver to receive, from a first information processing apparatus of the one or more counterpart information processing apparatuses, a recording start notification indicating that the first counterpart information processing apparatus starts recording or is recording the content data that is transmitted from the information processing apparatus, the recording start notification being transmitted with first identification information of the first counterpart information processing apparatus that is recording; and circuitry to output, based on the recording start notification, notification information indicating that recording of the communication is being performed, in association with information regarding the first counterpart information processing apparatus.
Abstract:
A shared terminal, includes circuitry to control a display to display an image to a plurality of users, the plurality of users sharing a use of the shared terminal; and a network interface to communicate with a terminal management server and a destination management server through a network. The circuitry obtains, from a first privately-owned terminal owned by a first user, first terminal identification information for identifying the first privately-owned terminal. Under control of the circuitry, the network interface transmits the first terminal identification information to a terminal management server; receives first user identification information from a terminal management server; transmits the first user identification information to the destination management server; receives a first email address of the first user from the destination management server; and transmits an email whose sender email address is the first email address.
Abstract:
A transmission control system includes a transmission controller to control transmission of content data in a session for transmitting the content data between communications terminals. When the transmission controller controls the transmission not to transmit image data from the first terminal to the second terminal, but to transmit image data from the first terminal to the third terminal while transmitting image data from the second terminal to the first terminal, and transmitting image data from the third terminal to the first terminal, the transmission controller controls the transmission to transmit, based on a request transmitted from the second terminal, image data from the first terminal to the second terminal, but not to transmit image data from the first terminal to the third terminal while transmitting image data from the second terminal to the first terminal, and transmitting image data from the third terminal to the first terminal.
Abstract:
An information processing apparatus for communication with an information processing device via a network disclosed. The information processing apparatus includes a display controlling unit configured to perform display control on a first screen that displays image data transmitted from the information processing device or on a second screen that displays information about the information processing device; and a first instruction receiving unit configured to receive a switching instruction to switch the first screen to the second screen. The display controlling unit performs the display control in a case where the first instruction receiving unit receives the switching instruction, such that auxiliary information about communication with the information processing device, the auxiliary information being displayed on the first screen, is not displayed on the second screen.
Abstract:
A transmission system for managing communication between a first terminal and a second terminal includes a reception unit configured to receive request information from the first terminal, the request information indicating a category of a request of a first user of the first terminal; and a transmission unit configured to transmit an output request to the second terminal. The second terminal outputs image data to be displayed on the first terminal according to the category of the request of the first user of the first terminal upon receiving the output request.
Abstract:
In this invention, a start request terminal transmits start request information including participation restriction information and participation authentication information to a management system. A transmission/reception unit of a participation request terminal transmits, to the management system, participation request information with which the participation request terminal requests participating in an established session. A state management unit determines whether a participation permitted terminal ID in a terminal management table matches the terminal ID of the participation request terminal, and when the participation permitted terminal ID in a terminal management table matches the terminal ID of the participation request terminal, the transmission/reception unit transmits the participation authentication information to the participation request terminal to inquire the participation authentication information. The participation determination unit compares the participation authentication information about the participation request terminal and the participation authentication information in the terminal management table, and determines whether to allow participation in the established session.
Abstract:
The loudspeaker includes a dome diaphragm that is made of a base material impregnated in a thermosetting resin; a cone diaphragm whose outer circumference side end portion is coupled with an outer circumference end portion of the dome diaphragm; and a voice coil having a bobbin whose one end is coupled to a back surface of the dome diaphragm, and whose outer curved surface is coupled with an inner circumference end portion of the cone diaphragm, wherein the dome diaphragm is provided with a plurality of cone-shaped projections that is formed by hardening the thermosetting resin, projecting from the back surface, and disposed in a circular pattern with a space between each other, the plurality of cone-shaped projections defining a coupling portion to which the one end of the bobbin is coupled.
Abstract:
A communication device for performing a communication through a network includes a storing unit configured to store a plurality of threshold values of communication speeds indicative of ranges of communication speeds and, associated therewith, a plurality of displaying methods for indicating conditions of communication in the ranges of communication speeds, respectively, an acquiring unit configured to acquire an available communication speed, and a displaying unit configured to compare the available communication speed with the threshold values of communication speeds stored in the storing unit, determine a range of communication speeds that the available communication speed belongs to, and display a condition of communication in the available communication speed chronologically in a displaying method which corresponds to the determined range of communication speeds.