H - Electricity – 04 – N
Patent
H - Electricity
04
N
H04N 7/12 (2006.01) H04L 27/34 (2006.01) H04N 5/44 (2006.01) H04N 7/015 (2006.01) H04N 7/24 (2006.01) H04N 7/26 (2006.01)
Patent
CA 2103980
In a high definition television signal encoder, high priority and standard priority digital data are each separated into quadrature I and Q components, spectrally shaped by digital filtering, and time division multiplexed to produce respective quadrature amplitude modulated signals of the 32-QAM type. The high priority QAM signal and the standard priority QAM signal exhibit different bandwidths and carrier frequencies. The high priority and standard priority QAM signals are combined in digital form to produce a prioritized dual 32-QAM digital signal before being conveyed to a single analog-to-digital converter and analog RF transmission networks.
Christopher Lauren Ann
Wang Tian Jun
Craig Wilson And Company
Thomson Consumer Electronics Inc.
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