Television – Two-way video and voice communication – User positioning
Patent
1993-10-22
1995-08-22
Kuntz, Curtis
Television
Two-way video and voice communication
User positioning
348 13, 379202, H04N 714, H04M 342
Patent
active
054444772
ABSTRACT:
A video telephone system which includes a master video telephone terminal (secretary terminal) connected to a communication network and slave video telephone terminals (executive terminals) connected to the master video telephone terminal in which the master video telephone terminal can transfer a call to the slave video telephone terminals. When a call comes into the secretary terminal from a remote terminal on the communication network, a line control section of the secretary terminal sets up a line. Video data and speech data received on the line are decoded by a video signal coding-decoding section and an aural signal coding-decoding section and the decoded signals are output through a display and a speech output device. Sound and images picked up by a microphone and a camera respectively are coded for transmission. Then, if a predetermined instruction of call transfer to an executive terminal is entered on an electronic tablet of the secretary terminal, a communication branch control section of the secretary terminal calls the executive terminal, sets up a line between the secretary and executive terminals on a local transmission network, and connects the line between the secretary terminal and the remote terminal.
REFERENCES:
patent: 4650929 (1987-03-01), Boerger et al.
patent: 4965819 (1990-10-01), Kannes
The article "Key Systems for Picturephone Service" by A. Daskalakis, Oct. 1971, pp. 270-277.
Fukano Masumi
Ishida Kiyoshi
Ishinabe Iwao
Kawasaki Takafumi
Matsubara Takashi
Chan Jason
Hitachi , Ltd.
Kuntz Curtis
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