SIGNAL ADAPTIVE FILTERING METHOD, SIGNAL ADAPTIVE FILTER ANDCOMPUTER READABLE MEDIUM FOR STORING PROGRAM THEREFOR

摘要

A signal adaptive filtering method for reducing blocking effect and ringi ng noise, a signal adaptive filter, and a computer readable medium. The signal adaptive filtering method capable of reducing blocking effect and ringing noise of image data when a frame is composed of blocks of a predetermined size includ es the steps of: (a) generating blocking information for reducing the blocking effect and ringing information for reducing the ringing noise, from coefficients of predetermined pixels of the upper and left boundary regions of the data block when a frame obtained by deconstructing a bitstream image data for inverse quantization i s an intraframe; and (b) adaptively filtering the image data passed through inver se quantization and inverse discrete cosine transform according to the generate d blocking information and ringing information. Therefore, the blocking effect and ringing noise can be eliminated from the image restored from the block-based image, thereby enhancing the image restored from compression.