Fast intra mode decision algorithm based on inter prediction mode for H264/AVC

Bahri, Nejmeddine; Nouri, Mohammad; Imen, Werda; Samet, Amine; Ayed, Mohamed Ali Ben

doi:10.1109/melcon.2012.6196562

Cited by 2 publications

(2 citation statements)

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“…Therefore, it is feasible to propose the novel methods for the MB mode selections in order to improve the quality of the ROI at the cost of acceptable quality decreasing for the NROI [1,8,17].…”

Section: Encoding Modementioning

confidence: 99%

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Region-of-interest based rate control algorithm for H.264/AVC video coding

2015

Multimed Tools Appl

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Conventional rate control algorithms allocate bits for every macroblock (MB) without consider whether it needs encoding, and they choose encoding mode only from the set provided by H.264/AVC standard. While, according to the human visual system (HVS) research, human eyes can only focus on one area in a frame, which is called region-of-interest (ROI). This phenomenon gives a chance to code all MBs unequally, especially for NROI MB, we may do not need encoded. In this paper, a ROI-based rate control algorithm for H.264/AVC video coding is proposed to improve the coding efficiency. After the ROI segmentation, the target bits are unequally allocated for each MB. For non-region-of-interest (NROI) MB coding, we proposed the Active MB Concealment (AMC) Mode in rate-distortion optimization (RDO). The AMC gives a tradeoff between the rate and distortion and improve the quality of the ROI MBs at the cost of the quality decreasing of the NROI MBs. Compared with the conventional rate control algorithms, the experimental results demonstrate that the proposed algorithm gives the better performance in terms of the average peak signal-to-noise ratio (PSNR) and the subjective evaluations, and maintains the smoothness of video quality.

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Section: Encoding Modementioning

confidence: 99%

“…Then, according to the QP determination method proposed in [3], we modified the QP from four restriction aspects. Finally, limiting the calculated QP within the range of [1,51]. 5) Performing the RDO: According to the obtained optimal QP, RDO is performed for each MB in the current frame.…”

Section: Summary Of the Proposed Rcamc Both For Encoding And Decodingmentioning

confidence: 99%