Context-based adaptive in-loop filter for video compression

Jung-Hak Nam; Kwang-Soo Jung; Hyun-Ho Jo; Donggyu Sim; Byeong-Doo Choi

doi:10.1117/1.OE.51.5.057402

4 May 2012 Context-based adaptive in-loop filter for video compression

Jung-Hak Nam; Kwang-Soo Jung; Hyun-Ho Jo; Donggyu Sim; Byeong-Doo Choi;

Author Affiliations +

Optical Engineering, 51(5), 057402 (2012). doi:10.1117/1.OE.51.5.057402

Abstract

We propose context-based adaptive in-loop filters not only to reduce complexity but also to achieve coding efficiency by combining deblocking and in-loop filters. The proposed adaptive filters are designed based on contexts such as slice types, boundary strength values, pixel positions, and boundary directions in order to improve coding gain. The proposed method is also embedded with a deblocking filter to reduce complexity and to maintain subjective quality. Experimental results show coding gains of approximately 6.3% and 0.5% compared with the deblocking filter of H.264/AVC and the conventional block-based adaptive loop filter, respectively. Then the proposed method reduces complexity by about 20.8%.

Citation Download Citation

Jung-Hak Nam, Kwang-Soo Jung, Hyun-Ho Jo, Donggyu Sim, Byeong-Doo Choi, "Context-based adaptive in-loop filter for video compression," Optical Engineering 51(5), 057402 (4 May 2012). https://doi.org/10.1117/1.OE.51.5.057402

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