Improvement of a television signal downward compatible with a conventional television standard, method of transmitting the improved television signal and video equipment processing the improved television signal

摘要

The invention is directed to a new standard television signal such as the PAL PLUS-TV SIGNAL provided with an additional signal (HF CODE) by means of which a receiver processor circuit, in particular a video equipment, may detect that the new standard TV signal is supplied through an inproper transmission medium which is not suitable for processing the TV signal according to the new standard. The invention also discloses a method of transmitting the improved television signal and a video processing system. IMAGE