H - Electricity – 04 – N
Patent
H - Electricity
04
N
H04N 7/08 (2006.01) H03M 13/35 (2006.01) H04J 3/02 (2006.01) H04J 3/16 (2006.01) H04J 7/00 (2006.01) H04L 27/34 (2006.01) H04N 5/40 (2006.01) H04N 7/015 (2006.01) H04N 7/24 (2006.01) H04N 11/06 (2006.01)
Patent
CA 2083725
In a time-division-multiplexing communications system, which transmits information from various sources in different time-slots, additional information is transmitted by varying the pattern of time slot assignments in accordance with a set of rules. As a result, the assignment pattern by which time slots are assigned to each of the various sources of information, conveys additional information. Specifically, a High Definition Television (HDTV) transmission system is constructed in which picture information is transmitted by time-division-multiplexing between two different, and disjoint, signal point constellations. Additional information is conveyed by the rule for switching between the different signal point constellations.
American Telephone And Telegraph Company
Kirby Eades Gale Baker
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