Abstract: An electronic whiteboard to display visual information including handwritten data superimposed with a display image, includes a unit to authenticate a user; a unit to obtain user identification information for identifying the user in case where authentication of the user has succeeded; a unit to store the visual information associated with the user identification information; a unit to read the visual information associated with the user identification information; a unit to display the visual information; a unit to set a mail address of the electronic whiteboard as a transmission source, and to transmit the visual information to a specified destination by an e-mail; a unit to store the mail address of the user associated with the user identification information; and a unit to replace the transmission source by using the specified mail address of the user if the authentication of the user has succeeded.

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 communication management system starts transmission of first image data captured at a first communication terminal to a second communication terminal through a communication session for display at the second communication terminal, and in response to receiving a communication start request for starting communication with the second communication terminal from the first communication terminal, starts transmission of second image data and second audio data respectively captured at the second communication terminal to the first communication terminal, and first audio data captured at the first communication terminal to the second communication terminal, through the communication session, to enable communication between the first communication terminal and the second communication 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 communication management system starts transmission of first image data captured at a first communication terminal to a second communication terminal through a communication session for display at the second communication terminal, and in response to receiving a communication start request for starting communication with the second communication terminal from the first communication terminal, starts transmission of second image data and second audio data respectively captured at the second communication terminal to the first communication terminal, and first audio data captured at the first communication terminal to the second communication terminal, through the communication session, to enable communication between the first communication terminal and the second communication terminal.

Abstract: A communication terminal determines whether counterpart information of a candidate counterpart communication terminal obtained from a memory is described in a first format or a second format, and transmits a communication start request to one of a first server and a second server based on a determination. When the determination indicates that the obtained counterpart information is described in the first format, the communication start request is transmitted to the first server on the first network. When the determination indicates that the obtained counterpart information is described in the second format, the communication start request is transmitted to the second server on the second network.

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.

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: Described herein is a server for managing a communication system including a plurality of terminals. The server includes circuitry configured to in response to an initiation request from an initiating terminal, generate a session ID and allocate a relay device, update the session management database based on the generated session ID and allocated relay device, transmit information identifying the generated session ID and the allocated relay device to the initiating terminal and destination terminals identified by the requesting terminal, establish a content data session between the requesting terminal and the one or more destination terminals, designate an owner terminal and one or more participating terminals for the content data session from the requesting terminal and the destination terminals based on information in a terminal management database, and instruct transmission of sound permission instructions to the owner terminal and sound restriction instructions to the one or more participating terminals.

Abstract: A transmission terminal is connected to a management device via a network. The transmission terminal includes an acquisition unit configured to acquire a communication state of another transmission terminal from the management device; a selection accepting unit configured to accept a selection of the another transmission terminal from a user to participate in an established session that has been already established for the another transmission terminal; a participation determination unit configured to determine that it is not possible to participate in the established session when the communication state of the another transmission terminal whose selection has been accepted indicates participation restriction; and a communication unit configured not to transmit a participation request to the management device when it is determined that the participation is not possible.

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: Disclosed is a transmission system to manage sessions established between a plurality of terminals for performing voice communications. The transmission system includes an acquisition part configured to receive a user's request from a user of a first terminal when a session start request is transmitted from a first terminal to a second terminal, a first sender configured to send the received user's request together with the session start request, a second sender configured to send to the second terminal the session start request from the first terminal by attaching the user's request to the session start request when the second terminal is in a communication capable status, and a presenting part configured to present the user's request to the second terminal at an arrival of an incoming call from the first terminal to the second terminal.

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.

Abstract: A communication system including: a first acquiring unit configured to obtain start request information for specifying whether participation in the session of a terminal is limited or not, and participation authentication information for authenticating participation in the session for the terminal; a session manager configured to establish the session; a second acquiring unit configured to obtain participation request information for requesting participation of a third terminal in the session, and the participation authentication information input from the third terminal; and a participation determination unit configured to compere the participation authentication obtained by the first acquiring unit and by the second acquiring unit, and determine whether participation of the third terminal in the session is allowed or not, and the participation determination unit configured to record terminal information of the third terminal, and to reject a subsequent participation request of the third terminal in the sess

Abstract: A transmission terminal is connected to a management device via a network. The transmission terminal includes an acquisition unit configured to acquire a communication state of another transmission terminal from the management device; a selection accepting unit configured to accept a selection of the another transmission terminal from a user to participate in an established session that has been already established for the another transmission terminal; a participation determination unit configured to determine that it is not possible to participate in the established session when the communication state of the another transmission terminal whose selection has been accepted indicates participation restriction; and a communication unit configured not to transmit a participation request to the management device when it is determined that the participation is not possible.

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: 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: 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 speaker diaphragm 1 includes a first diaphragm portion 5, a second diaphragm portion 6 integrally molded with the first diaphragm portion 5, and a bobbin-receiving portion 7 protruding from a back side of a connecting portion between the first diaphragm portion 5 and the second diaphragm portion 6, with one end of a voice coil bobbin 2 being bonded to the bobbin-receiving portion 7. The bobbin-receiving portion 7 includes a first extension 8 extending backwards from the first diaphragm portion 5 and a second extension 9 extending backwards from the second diaphragm portion 6. A bobbin-receiving groove 10 is defined between the first extension 8 and the second extension 9. The voice coil bobbin 2 is inserted in and bonded to the bobbin-receiving groove 10.