Title :
Efficient post-processing for block-based compressed video
Author :
Kim, Yonghun ; Yi, Taihong
Author_Institution :
Sch. of Electr. Eng. & Comput. Sci., Yeungnam Univ., Gyeongsangbuk-do, South Korea
Abstract :
In digital video coding, the 2-D block-based discrete cosine transform (DCT) has been widely used, combined with the quantization techniques of DCT coefficients, for the purpose of compression of video data. Video compression algorithms using this block-based transform coding method cause the blocking and ringing artifacts in the reconstructed images of a video sequence. In this paper, we propose the efficient post-processing algorithm for coded video sequence, where the ringing effects near sharp edges are smoothed out and the blocking effects are removed without blurring the edge regions at the decoder. The simulation examples of processing images coded by MPEG-2 are presented to demonstrate that a significant improvement has been achieved.
Keywords :
data compression; discrete cosine transforms; image reconstruction; image sequences; transform coding; video coding; MPEG-2; block-based compressed video; coded video sequence; decoder; digital video coding; efficient post-processing algorithm; image compression; image sharp edge region; reconstructed image; removed blocking effect; smoothed out ringing effect; Decoding; Discrete cosine transforms; Image coding; Image reconstruction; Low pass filters; Quantization; Smoothing methods; Transform coding; Video compression; Video sequences;
Conference_Titel :
Video/Image Processing and Multimedia Communications, 2003. 4th EURASIP Conference focused on
Print_ISBN :
953-184-054-7
DOI :
10.1109/VIPMC.2003.1220446
