Efficient intra- and inter-mode selection algorithms for H.264/ AVC

Intra-frame mode selection and inter-frame mode selection are new features introduced in the H.264 standard. Intra-frame mode selection dramatically reduces spatial redundancy in Iframes, while inter-frame mode selection significantly affects the output quality of P-/Bframes by selecting an optimal block size with motion vector(s) or a mode for each macroblock. Unfortunately, this feature requires a myriad amount of encoding time especially when a brute force full-search method is utilised. In this paper, we propose fast mode selection algorithms tailored for both intra-frames and inter-frames. The success of the intraframe algorithm is achieved by reducing the computational complexity of the Lagrangian rate-distortion optimisation evaluation. Two proposed fast inter-frame mode algorithms incorporate several robust and reliable predictive factors, including intrinsic complexity of the macroblock, mode knowledge from the previous frame(s), temporal similarity detection and the detectio...

• Type: Journal
• Year: 2006
• Where: JVCIR
• Authors: Andy C. Yu, King Ngi Ngan, Graham R. Martin
• Keywords: Inter-frame Mode, Intra-frame Mode Selection, JVCIR 2006, Mode Selection