Adaptive modulation/demodulation signal processing

摘要

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.