Abstract: A data transmission method and a data transmission system not requiring a large delay unit for multiplexing and composition and capable of reducing the hardware scale, wherein when transmitting data among multiple points from a plurality of terminals arranged in a network, when the data at multiple points are transmitted to the terminals, in the network, identical packets are added different time stamps in accordance with the transmission delays, whereby the data shifted in accordance with the transmission delays are transmitted.

Abstract: A data transmission method and a data transmission system not requiring a large delay unit for multiplexing and composition and capable of reducing the hardware scale, wherein when transmitting data among multiple points from a plurality of terminals arranged in a network, when the data at multiple points are transmitted to the terminals, in the network, identical packets are added different time stamps in accordance with the transmission delays, whereby the data shifted in accordance with the transmission delays are transmitted.

Abstract: An output image selector (17) compares STC of a display unit (15) and PTS of a frame, and states selection information indicating whether a frame nearest to later STC than PTS is to be selected at present in a memory area where the frame is stored so that the memory area is selected as an extraction destination. The display unit (15) extract frames from memories (14) on the basis of the selection information, and combine them together. A decoder (13) judges, according to the selection information, whether the memory area is to be liberated or held. Thus, a plurality of streams can be displayed with synchronization of streams with each other, not depending upon a difference in frame rate from one stream to another.

Abstract: A communication control apparatus having a server apparatus and able to simplify procedures and operations to attend party communication, wherein the server apparatus 103 receives information designating terminal apparatuses 1052 to 1054 and a request seeking that the designated communication apparatuses attend the multipoint communication via a communication circuit, outputs inquiries PAI if the designated terminals intend to attend the multipoint communication via the communication circuit, and when receiving an answer PAA from the designated terminal apparatuses that they will attend said multipoint communication, controls the multipoint communication among a plurality of the terminal apparatuses including the designated communication apparatuses.

Abstract: A data transmission method and a data transmission system not requiring a large delay unit for multiplexing and composition and capable of reducing the hardware scale, wherein when transmitting data among multiple points from a plurality of terminals arranged in a network, when the data at multiple points are transmitted to the terminals, in the network, identical packets are added different time stamps in accordance with the transmission delays, whereby the data shifted in accordance with the transmission delays are transmitted.

Abstract: A communication control apparatus capable of easily dividing channel fees including fees for use of a communication channel charged for party communication in a variety of ways among the users engaged in the party communication, wherein provision is made of a party connection control module for controlling data transmitted by terminals via a communication channel to be transmitted to other communication devices other than the terminals which transmitted the data and a user fee determination module for calculating fees to be charged for use of the communication channel by the terminals and determining fees to be charged to users based on the calculated fees and fees to be charged for the party communication connection service.