ADDITIONAL SIGNAL MULTIPLEXER FOR TV SYSTEM.

摘要

A system for transmitting a first TV signal of this invention is so contrived that the first TV signal for a wide TV screen can be transmitted through one channel and can also be reproduced even with a conventional receiver having standard TV screen. For this purpose, a screen dividing circuit (12) divides the first signal into a second TV signal for a center screen and a third TV signal for the side screens. The second signal for the center screen is supplied to an adder circuit (16) via a delay circuit (13). The third signal is further divided into horizontal and vertical side signals. The horizontal side signal is supplied to the adder (16) via a horizontal overscan multiplexing circuit (16) to be added to the horizontal overscan part of the center screen signal. The vertical side signals are compressed in time by a vertical overscan multiplexing circuit (20), subjected to the inversion processing, and are continuously arranged. The output of the vertical overscan multiplexing circuit (20) is time-divisionally superposed by a switch (18) on the vertical overscan part of the center screen signal sent from the adder circuit (16) via a delay circuit (17).