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. A filtering method for removing blocking artifacts, comprising:
obtaining filter information based on quantized transform values obtained by transforming and quantizing video data based on a block-by-block basis; determining a strength of filtering for a current block from among a plurality of strengths of filtering based on information on the current block and at least one neighboring block of the current block; and performing deblocking filtering on the video data to remove at least one of artifact and noise from the video data, based on the determined strength of filtering, wherein the deblocking filtering obtains motion-compensated pixel values of the current block and outputs filtered pixel values for a predetermined-number of pixel values among the obtained motion-compensated pixel values based on the determined strength of filtering, and the obtaining the filtering information and the performing the deblocking filtering are performed on a loop filter located in a feedback path of a filtering apparatus to use the filtered pixel values for encoding a next block.