Sound and vision communications terminal including an auxiliary

Details Sound and vision communications terminal including an auxiliary Sound and vision communications terminal including an auxiliary

1990-10-19

1992-08-25

Dwyer, James L.

Telephonic communications

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

Including fiber optic link within telephone network

379434, 358 85, H04M 1100

Patent

active

051425629

ABSTRACT:
A table-top terminal for sound and vision communications, of the type associated, in particular, with a telephone set, and comprising a case (100) containing: a display screen monitor (128), a camera (132) having a lens system (130), manual control means, and an electronic assembly for the purposes of control, coding/decoding, and interfacing with a transmission line, wherein, for the purpose of compensating the illumination of a speaker in an environment having overhead ambient lighting and thereby enabling the camera to obtain a balanced image of said speaker, the terminal further includes an auxiliary lighting device (160) having a general emission direction (C) which is essentially upwardly inclined towards the speaker, together with a mechanism for adjusting the light flux emitted by the device as a function of the ambient lighting.

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Y. Takemura et al, "Characteristics of the color TV Telephone", IEEE, Transactions on Broadcasting, vol. BC-19, No. 4, pp. 77-84, Dec., 1973.
P. Litz, "Video Liser's Handbook", Chapter 10, pp. 200-223 .COPYRGT.1980, Prentice Hall.

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