Digital space phone system

Details Digital space phone system Digital space phone system

Category

H - Electricity

Subcategory

04

Subsubcategory

N

CPC

350/3, 379/3

IPC codes

H04N 7/00 (2006.01) H04M 9/08 (2006.01) H04M 11/00 (2006.01)

Type

Patent

Patent number

CA 1192992

Description

ABSTRACT OF THE DISCLOSURE A television receiver having two-way telephone capability includes a digitized talk channel and a digitized listen channel each having a gain-controlled amplifier selectively controlled by a switch controlled generator driven by the output of a subtraction circuit. Multipliers are connected to the inputs of the subtraction circuit and in turn receive respective inputs from their associated channels and from the other channels for offsetting cross coupled signals due to the telephone interface.

Application Number

427002

Affiliated with

Also associated with

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