Adaptive amplitude averaging for weighting quantizing noise

Details Adaptive amplitude averaging for weighting quantizing noise Adaptive amplitude averaging for weighting quantizing noise

H - Electricity

04

N

350/81

H04N 5/21 (2006.01) H04B 14/04 (2006.01) H04N 5/44 (2006.01) H04N 7/26 (2006.01) H04N 9/64 (2006.01)

Patent

CA 1158355

-16- RCA 74,900 ABSTRACT OF THE INVENTION An apparatus reduces quantizing noise by averaging picture information when only low frequency information is present. Thus, high frequency detail is not lost. This is determined by looking at proximate samples to see if their amplitudes are within a selected amount of each other. The averaging typically is of two or four picture samples depending upon how great an area has only low frequencies, but greater numbers of samples can be used.

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