Television – Bandwidth reduction system – Data rate reduction
Patent
1990-06-22
1995-06-06
Groody, James J.
Television
Bandwidth reduction system
Data rate reduction
348421, 348406, H04N 712, H04N 1102
Patent
active
054226759
ABSTRACT:
Method and apparatus for channel noise reduction. This method uses adaptive modulation/demodulation for noise reduction. The modulation factor does not require a large amount of data to be represented. Representation is based upon a frequency-domain function having a particular characteristic. A preferred embodiment of the invention incorporates transform or subband-filtered signals which are transmitted as a modulated analog representation of a local region of a video signal. The modulation factor reflects the particular characteristic. Side information specifies the modulation factor.
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Groody James J.
Lee Michael H.
Massachusetts Institute of Technology
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