H - Electricity – 04 – N
Patent
H - Electricity
04
N
350/33
H04N 7/00 (2006.01) H04N 7/015 (2006.01) H04N 7/26 (2006.01)
Patent
CA 2037757
-22- PAM SIGNAL MODULATION WITH MAPPINGS TO IMPROVE UTILIZATION OF AVAILABLE T`RANSMISSION CAPACITY Abstract A high definition television system that is characterized by low transmission bandwidth is achieved by removing redundancies in the signal, encoding the remaining signals, and transmitting the encoded signal in a manner that is most compatible with the applicable standards. The dynamic range of the encoded signal is reduced by combining groups of adjacent samples that are smaller than a "floor" threshold to form larger samples, and by splitting samples that are larger than a "ceiling" threshold to form a plurality of smaller samples. Encoding of the combined samples is carried out in a conforming manner to minimize deleterious effects of transmission noise.
Knauer Scott C.
Netravali Arun Narayan
Petajan Eric D.
Westerink Peter H.
American Telephone And Telegraph Company
Kirby Eades Gale Baker
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