Filtering method for removing block artifacts and/or ringing noise and apparatus therefor

摘要

Provided are a filtering method and apparatus for removing blocking artifacts and ringing noise. The filtering method includes transforming video data on a block-by-block basis, and detecting the presence of an edge region in the video data by checking the distribution of values obtained by the transformation. Accordingly, it is possible to completely remove blocking artifacts and/or ringing noise by more effectively detecting the presence of an edge region in video data.

主权项

1. An decoder for decoding video data, comprising a loop filter, wherein the loop filter comprises:
a quantizer which quantizes a block comprising video data in pixel units so as to obtain quantized values, a filter information producer which creates filter information based on a distribution of the quantized values; a filter characteristics determiner which determines filter characteristics based on the created filter information; and a deblocking filter which deblocking filters based on the determined filter characteristics wherein the filter information producer determines filtering strength for a current block based on the filter information on the current block and at least one neighboring block of the current block and the deblocking filter filters the video data based on the determined filtering strength.