Patent Document ID: 5473384
Application ID: 08168598
Patent Status: 1

Claim One:
1. A method of enhancing a distorted video signal, the distorted video signal comprising a set of image matrices adapted to be transmitted over a transmission medium of a digital communications setup, the digital communications setup comprising a coder, a decoder, and the transmission medium, the method comprising the steps of: (a) filtering the set of image matrices with a first post-filter to generate a set of image intensity matrices; and (b) filtering the set of image intensity matrices with a second post-filter to generate a set of enhanced image signals, the filtering comprising: (1) classifying an image intensity matrix in the set of image intensity matrices into a set of edge pixels and a set of non-edge pixels; (2) filtering the set of edge pixels with a first sub-filter of the second filter to generate a first portion of an enhanced image matrix in the set of enhanced image signals; (3) classifying the non-edge pixels into a set of smooth pixels and non-smooth pixels; (4) filtering the smooth pixels with a second sub-filter of the second filter to generate a second portion of the enhanced image matrix; (5) classifying the non-smooth pixels into a set of moving pixels and a set of non-moving pixels, the set of non-moving pixels comprising a third portion of the enhanced image matrix; (6) filtering the set of moving pixels with a third sub-filter of the second filter to generate a fourth portion of the enhanced image matrix; (7) combining the first portion, the second portion, the third portion, and the fourth portion to form the enhanced image matrix; and (8) repeating steps (b)(1) through (b)(7) for other enhanced image matrices in the set of enhanced image signals.