Distance-based weighted prediction for Adaptive Intra Mode Bit Skip in H.264/AVC

Adaptive Intra Mode Bit Skip (AIMBS) technique using boundary pixels smoothness has been shown to achieve coding efficiency improvement for H.264/AVC's Intra_4x4 coding in relatively large QPs. However, the DC mode in the Multiple-Prediction of the AIMBS becomes much less effective. To tackle this problem and further improve the coding efficiency, distance-based weighted prediction (DWP) is proposed to replace DC mode in MultiplePrediction for predicting blocks without directional preferences. The proposed method is named as AIMBSDWP that can enhance the robustness of AIMBS in much larger range of QPs and achieving higher rate-distortion performance. Experimental results show that an average bitrate reduction of 3.79% with lower computational requirement can be obtained by AIMBS-DWP as compared with H.264/AVC. The improvement is especially obvious in high visual quality configurations with small QPs.

• Type: Journal
• Year: 2010
• Where: ICIP
• Authors: Lai-Man Po, Liping Wang, Kwok-Wai Cheung, Ka-Man Wong, Ka-Ho Ng, Shenyuan Li, Chi-Wang Ting
• Keywords: Adaptive Intra Mode, Coding Efficiency, DC Mode, ICIP 2010, Image Processing