Multiple code subscription television system

Claim 1

IN TRANSMITTING MEANS FOR A SCRAMBLED PICTURE TRANSMISSION SYSTEM, MEANS FOR GENERATING PICTURE SIGNALS, MEANS COUPLED THERETO FOR GENERATING A PLURALITY OF DIFFERENT MODES OF SAID PICTURE SIGNALS, AND MEANS COUPLED TO AND RESPONSIVE TO THE AFORESAID MEANS FOR TRANSMITTING A DIFFERENT MODE OF THE PICTURE SIGNALS DURING DIFFERENT TIME PERIODS WHICH OCCUR AT A RATE SUFFICIENT TO RENDER AN UNAUTHORIZED RECEIVER DISPLAY UNINTELLIGIBLE, MEANS INCLUDING COMMUTATION MEANS FOR SELECTING FROM TIME TO TIME WHICH OF SAID MODES IN TRANSMITTED, MEANS FOR TRANSMITTING MODE CONTROL SIGNALS FOR MAINTAINING RECEIVER COMMUTATION MEANS IN SYNCHRONISM WITH SAID TRANSMITTER COMMUTATION MEANS, MEANS COUPLED TO THE COMMUTATION MEANS FOR GENERATING COMMUTATION CONTROL SIGNALS TO CONTROL THE TRANSMITTER COMMUTATION MEANS, AND ENCODING MEANS INTERCONNECTING THE LAST TWO RECITED MEANS, THE ENCODING MEANS INCLUDING MEANS FOR PROVIDING A CHANGEABLE TIME DELAY BETWEEN THE TRANSMITTED COMMUTATION SIGNALS AND THE COMMUTATION CONTROL SIGNALS.