Television – Bandwidth reduction system – Format type
Patent
1992-12-16
1994-05-17
Groody, James J.
Television
Bandwidth reduction system
Format type
348469, H04N 712, H04N 700
Patent
active
053132793
ABSTRACT:
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.
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Christopher Lauren A.
Wang Tian J.
Grant Chris
Groody James J.
Herrmann Eric P.
Kurdyla Ronald H.
Thomson Consumer Electronics
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