Television bandwidth system and method

Claim 1

A TELEVISION SYSTEM COMPRISING: CAMERA TUBE MEANS INCLUDING MEANS FOR CONVERTING AN OPTICAL IMAGE INTO A CORRESPONDING ELECTRICAL CHARACTERISTIC PATTERN AND SCANNIGN MEANS FOR CONVERTING SAID PATTERN INTO AN INITIAL TIMEBASED VIDEO SIGNAL HAVING A FIRST EXTREME LEVEL IN REPSONSE TO THE PRESENCE OF INFORMATION HAVING PREDETERMINED CHARACTERISTICS IN SAID IMAGE; SWEEP GENERATING MEANS FOR SELECTIVELY ACTUATING SAID SCANNING MEANS AT RELATIVELY FAST AND SLOW RATES, RESPECTIVELY; MEANS FOR ACTUATING SAID SWEEP GENERATING MEANS TO PROVIDE SAID FAST SCANNING RATE IN RESPONSE TO SAID FIRST LEVEL INITIAL VIDEO SIGNAL AND TO PROVIDE SAID SLOW SCANNING RATE IN THE ABSENCE OF SAID FIRST LEVEL INITIAL VIDEO SIGNAL; MEANS FOR PROVIDING A FIRST CONTROL SIGNAL IN RESPONSE TO A FIRST LEVEL INITIAL VIDEO SIGNAL HAVING A DURATION SHORTER THAN A PREDETERMINED TIME; MEANS FOR PROVIDING IN RESPONSE TO SAID FIRST-NAMED CONTROL SIGNAL ANOTHER CONTROL SIGNAL HAVING A DURATION WHICH WHEN ADDED TO THE DURATION OF SAID SHORTER FIRST LEVEL INITIAL VIDEO SIGNAL BEARS THE SAME RELATION TO THE DURATION OF SAID SHORTER FIRST LEVEL INITIAL VIDEO SIGNAL AS THE RELATION OF SAID FASTT SCANNING RATE TO SAID SLOW SCANNING RATE; MEANS FOR INTERRUPTING SAID SCANNING IN RESPONSE TO SAID OTHER CONTROL SIGNAL; MEANS FOR MODIFYING SAID SHORTER FIRST LEVEL INITIAL VIDEO SIGNAL IN RESPONSE TO SAID FIRST CONTROL SIGNAL TO PROVIDE A VIDEO SIGNAL HAVING A SECOND LEVEL AND A DURATION EQUAL TO THAT OF SAID SHORTER FIRST LEVEL INITIAL VIDEO SIGNAL PLUS THAT OF SAID OTHER CONTROL SIGNAL, SAID MODIFYING MEANS PASSING SAID INITIAL VIDEO SIGNALS IN UNMODIFIED FORM IN THE ABSENCE OF A SAID FIRST CONTROL SIGNAL; MEANS FOR TRANSMITTING THE MODIFIED AND UNMODIFIED VIDEO SIGNALS AND FOR RECEIVING THE SAME; SIGNAL-TOIMAGE CONVERTING MEANS INCLUDING ANOTHER SCANNING MEANS FOR CONVERTING THE RECEIVED VIDEO SIGNALS INTO AN OPTICAL IMAGE; ANOTHER SWEEP GENERATING MEANS FOR SELECTIVELY ACTUATING SAID OTHER SCANNING MEANS AT SAID FAST AND SLOW RATES, RESPECTIVELY; AND MEANS FOR ACTUATING SAID OTHER SWEEP GENERATING MEANS TO PROVIDE SAID FAST SCANNING RATE IN RESPONSE TO A RECEIVED VIDEO SIGNAL HAVING SAID FIRST LEVEL AND SAID SLOW SCANNING RATE IN THE ABSENCE OF SAID FIRST LEVEL RECEIVED VIDEO SIGNALS.