Patent ID: 7738417

Claim:
A communication system, for providing a first user to perform instant video communication with a second user, the communication system comprising: a mobile communication apparatus, for generating a first video data stream related to the first user by operation of the first user, and transmitting the first video data stream to a modem via a mobile communication network, and the mobile communication apparatus receiving a second video data stream related to the second user via the mobile communication network from the modem, wherein the first video data stream has a first communication protocol, and the second video data stream has the first communication protocol; the modem, for receiving the first video data stream via the mobile communication network, and transmitting the first video data stream to a gateway server, and receiving the second video data stream from the gateway server and transmitting the second video data stream to the mobile communication apparatus via the mobile communication network; the gateway server, for receiving the first video data stream from the modem, and converting the first video data stream to a third video data stream related to the first user, and transmitting the third video data stream to a program processing apparatus via an internet, and the gateway server receiving a fourth video data stream from the program processing apparatus, and converting the fourth video data stream to the second video data stream, and transmitting the second video data stream to the modem, wherein the third video data stream has a second communication protocol, and the fourth video data stream has the second communication protocol; and the program processing apparatus, for performing an instant messaging program, and generating the fourth video data stream related to the second user by operation of the second user, and transmitting the fourth video data stream to the gateway server via the internet, and receiving the third video data stream related to the first user from the gateway server.