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In this paper, an efficient search center definition algorithm is proposed for H.264/AVC. H.264/AVC achieved high coding efficiency by introducing some new coding tools including a new definition of the search center. However, the definition of the search center is not efficient in the case of significant motions. This work proposes some new search center candidates using spatial and temporal correlations...
Motion estimation occupies most of the required computation in video compression, and many fast search algorithms were proposed to reduce huge computation. SAD (sum-of-absolute difference) calculation is the most computation-intensive process in the motion estimation. Early termination is widely used in SAD calculation, where SAD calculation is terminated and it proceeds to next search position if...
In this paper, we propose an adaptive early termination algorithm for motion estimation in multi-view video coding (MVC). Currently, in order to find the optimal motion vector (MV) during MVC, all the reference frames need to be traversed, but the time consumption would be huge for a 7-modal block during the whole coding process. In the hope of reducing the coding time-consumption and meanwhile maintaining...
In this paper, we propose a fast mode decision algorithm for intra and inter prediction for H.264/AVC video coding. Here the subband decomposition of the input video is done for the fast mode prediction. To the LL band of the subband decomposition of the video, exhaustive intra prediction is done. To the LH, HL and HH bands selective intra prediction modes are used for the intra prediction. For the...
Research on inter-prediction algorithms is an important respect in the real-time video codec technology. In the regarded studies, the prediction error can be reduced by incorporating high accuracy estimation and compensation algorithms. So the performance of compressed video can be improved. However, this brings a considerable cost for the complexity of encoder. The computation complexity is mainly...
To cope with the defects of the fast search algorithms based on the UESA (unimodal error surface assumption) that can easily lead to a local minimum or wrong search direction and on the analysis of the characteristics of many kinds of motion sequences, a new search algorithm based on the Muti-Octogon-Grid (MOGS) is proposed. The algorithm takes adaptive search strategies by using the distribution...
Video Compression has played an important role in Multimedia data storage and transmission. Video compression techniques remove spatial as well as temporal redundancy using intra-frame and inter-frame coding respectively. A large level of compression can be achieved through inter-frame coding. In this paper, performance of four matching criterion in the temporal coding of video signal, which are Minimum...
Based on the statistical analysis of relation between CBP (Coded Block Pattern), MVD (Motion Vector Difference) and each coding mode, a fast mode selection algorithm based on macroblock-adaptive is proposed. In this algorithm, adaptive judgment strategies are adopted to filter partial coding mode quickly. The residual CBP, MVD information is used adequately to identify the relativity of intra and...
Based on the directional characteristic of SAD (sum of absolute difference) distribution and the center-biased characteristic of motion vectors, a fast BMA (block-matching motion estimation algorithm), DLTS (diamond line/triangle search), is proposed in this paper. DLTS employs line search pattern (LP) or triangle search pattern (TP) adaptively according to the distance between the MBD (minimum block...
Based on adaptive rood pattern search (ARPS) algorithm, a new fast and efficient motion estimation algorithm called enhanced adaptive rood pattern search (E-ARPS) is proposed in this paper. Unlike ARPS, the E-ARPS utilizes spatial correlations to predict the initial search centre, then introduces a new initial search based on motion vector(MV) centre-biased distribution , and an adaptive unequal-arm...
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