Patent ID: 6865229
Filing Date: 2005-03-08
Classification: H04N

Abstract:
1. A method of improving the visual perception of a picture, the picture being derived from a decoded picture signal comprised of blocks of quantized coefficient data produced by encoding an input picture signal, the method comprising: decoding first picture data representing a first encoded picture block being of an n×m sized group of pixels and decoding neighboring picture data representing a neighboring encoded picture block being of an n×m sized group of pixels; obtaining the run-length codes of each of the first encoded picture block and the neighboring encoded picture block; deriving filter coefficients based on the run-length codes of each of the first encoded picture block and the neighboring encoded picture block; providing the filter coefficients, the decoded first picture data and the neighboring picture data to an adaptive filter for filtering the decoded picture data of the first and neighboring picture blocks; filtering the decoded picture data of the first and neighboring picture blocks; and producing an outputted filtered picture signal.