Reduced bandwidth pulse modulation scheme using dual mode encoding in selected sub-block sampling periods

Claim 1

A TELEVISION TRANSMISSION SYSTEM COMPRISINGG TRANSMITTING MEANS, RECEIVING MEANS, AND COMMUNICATION CHANNEL MEANS INTERCONNECTING SAID TRANSMITTING MEANS AND SAID RECEIVING MEANS, SAID TRANSMITTING MEANS COMPRISING A SOURCE OF VIDEO SIGNALS, MEANS TO SAMPLE SAID VIDEO SIGNALS, DIFFERENTIAL ENCODING MEANS, FULL SCALE ENCODING MEANS, MEANS TO PROCESS SAID SAMPLES FOR THE PURPOSES OF ENCODING AND TRANSMISSION IN MASTER BLOCKS HAVING A FIXED NUMBER OF SAMPLES, MEANS TO SUBDIVIDE SAID MASTER BLOCKS INTO SUB-BLOCKS EACH HAVING A FIXED NUMBER OF SAMPLES, MEANS SELECTING SAID DIFFERENTIAL ENCODING MEANS TO ENCODE SAMPLES WHERE SAID VIDEO SIGNAL CHANGES SLOWLY, MEANS TO SELECT SAID FULL SCALE ENCODING MEANS TO ENCODE SAMPLES WHERE SAID VIDEO SIGNAL CHANGES RAPIDLY, MEANS TO LIMIT THE NUMBER OF SAMPLES WHICH MAY BE FULL SCALE ENCODED IN ANY ONE OF SAID MASTER BLOCKS, MEANS TO DISTRIBUTE THE UTILIZATION OF FULL SCALE ENCODED SAMPLES WITHIN ONE OF SAID MASTER BLOCKS BY ALLOTTING A SPECIFIED NUMBER OF FULL SCALE ENCODED SAMPLES TO EACH OF SAID SUB-BLOCKS, MEANS TO ACCUMULATE THE UTILIZATION OF FULL SCALE ENCODED SAMPLES NOT UTILIZED IN ANY ONE OF SAID SUB-BLOCKS AND TO ALLOT SAID ACCUMULATED SAMPLES TO ANY SUBSEQUENT ONE OF SAID SUB-BLOCKS, AND MEANS TO TRANSMIT SAID MASTER BLOCKS OF ENCODED SAMPLES TO SAID RECEIVING MEANS, SAID RECEIVING MEANS COMPRISING, MEANS TO DECODED DIFFERENTIALLY ENCODED SAMPLES, MEANS TO DECODE FULL SCALE ENCODED SAMPLES, AND MEANS RESPONSIVE TO THE RATE OF CHANGE OF SAID TRANSMITTED ENCODED SAMPLES TO SELECT THE APPROPRIATE ONE OF SAID DECODING MEANS.