1 September 2003 Fast loop filtering using separable characteristics of the integer 2-D discrete cosine transform
Author Affiliations +
Optical Engineering, 42(9), (2003). doi:10.1117/1.1594193
Abstract
When an image is highly compressed, video coding using the discrete cosine transform (DCT) and quantization produces noticeable image degradations, such as blocking artifacts and ringing noise. In order to reduce the degradations, a loop filtering algorithm is proposed, which consists of simple deblocking filtering and a fast decision rule for ringing and blocking conditions. The proposed method utilizes a four-point integer DCT for detecting blocking and ringing conditions. It also adopts an early termination policy during detection of the blocking and ringing conditions in the DCT domain. This policy speeds up computation of the filtering. The proposed method is compared with the loop filtering of the Joint Video Team (JVT) codec. As an experimental result, the computation time of the proposed method is approximately 20% faster than that of the JVT loop filtering, while the PSNR is almost the same.
Yung-Lyul Lee, Il-Hong Shin, Hyun Wook Park, "Fast loop filtering using separable characteristics of the integer 2-D discrete cosine transform," Optical Engineering 42(9), (1 September 2003). https://doi.org/10.1117/1.1594193
JOURNAL ARTICLE
7 PAGES


SHARE
RELATED CONTENT

Preprocessing of compressed digital video
Proceedings of SPIE (December 29 2000)
DCT computation with minimal average number of operations
Proceedings of SPIE (January 10 1997)
Advances in hybrid video coding
Proceedings of SPIE (January 29 2007)

Back to Top