Still image video telephone transmission system

Details Still image video telephone transmission system Still image video telephone transmission system

1990-08-10

1991-08-20

Ng, Jin F.

Telephonic communications

Having light wave or ultrasonic link for speech or paging...

Including fiber optic link within telephone network

358 85, H04N 142

Patent

active

050420615

ABSTRACT:
A still picture video telephone transmission system for transmitting and receiving, via a telephone line, a still picture taken by a camera; a picture signal is transmitted and received by a transmitting circuit and a receiving circuit, to which improvements are made so as to display a still picture clearly without distortion. For this purpose, the transmitting circuit sends picture element signals together with image correcting signals such as a picture element displacement detecting signal, a phase inversion detecting signal, and settling data. The receiving circuit detects the image correcting signals in the picture element signal, and makes the necessary corrections so as to enable the still picture to be displayed in good shape.

REFERENCES:
patent: 4258387 (1981-03-01), Lemelson et al.
patent: 4485400 (1984-11-01), Lemelson et al.
patent: 4943994 (1990-07-01), Ohtsuka et al.
patent: 4979028 (1990-12-01), Minematsu et al.
patent: 4985911 (1991-01-01), Emmons et al.

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