Telephonic communications – Having light wave or ultrasonic link for speech or paging... – Including fiber optic link within telephone network
Patent
1991-04-04
1993-03-02
Dwyer, James L.
Telephonic communications
Having light wave or ultrasonic link for speech or paging...
Including fiber optic link within telephone network
379 54, 358 85, H04N 142, H04N 714
Patent
active
051916010
ABSTRACT:
A video phone unit comprising a decoder for expanding a received picture transmitted from the other party, a television camera for photographing a subject for producing a photographed picture on one party side, a hook for detecting whether the camera is immobile or mobile and generating either a first detecting signal indicating that the hook is in a mobile state or a second detecting signal indicating that the hook is immobile, a changeover switch for selecting either the received picture expanded at the decoder or the photographed picture taken at the camera after receiving the first or second detecting signal provided from the hook, a display for displaying one picture selected at the changeover switch, and a coder for compressing and transmitting the photographed picture provided from the camera to the other party.
REFERENCES:
patent: 4258387 (1981-03-01), Lemelson et al.
patent: 4330797 (1982-05-01), Yokokawa et al.
patent: 4856045 (1989-08-01), Hoshina
patent: 4928300 (1990-05-01), Ogawa et al.
patent: 5036390 (1991-07-01), Masunaga
Toshiba Newsletter, No. 316, Toshiba Corporation, Japan, Nov. 1988.
Dachiku Kenshi
Ida Takashi
Matsumura Yoshikuni
Ohzeki Kazuo
Ueno Hideyuki
Chan Jason
Dwyer James L.
Kabushiki Kaisha Toshiba
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