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The search range (SR) parameter plays an important role in motion estimation (ME) for video coding. Adaptively adjusting SR according to the information given by previously encoded syntax element, also known as adaptive search range (ASR) algorithm, can efficiently reduce the computational complexity of ME. Compared with heuristic search pattern (HSP) algorithms like diamond/hexagon search, ASR algorithms...
With the ubiquitous application of Internet and wireless networks, H.264 video communication becomes more and more popular. However, due to the high-efficiently predictive coding and the variable length entropy coding, it is more sensitive to transmission errors. Error concealment (EC) is just an approach to utilize the spatial and temporal correlations to conceal the corrupted region. In this paper,...
Motion vector prediction (MVP) candidates are frequently and widely used to predict the start position for motion estimation (ME). They are rarely utilized for other purposes such as calculating dynamic search range (DSR). This paper proposes a novel DSR decision method for variable block-size motion estimation (VBSME) in H.264/AVC by utilizing the information included by two MVP candidates. Experimental...
Compared with previous video standards, the computational complexity of H.264/AVC is extraordinarily high due to newly adopted tools such as variable block size motion estimation (VBSME). In VBSME, to each macroblock (MB) there are at all 41 blocks corresponded. These 41 blocks are sized from 4x4 through 16x16. As each block of these 41 blocks accounts for one independent search window (SW), thus...
Compared with previous standards, H.264/AVC adopts variable block size motion estimation (VBSME) and multiple reference frames (MRF) to improve the video quality. So full search motion estimation algorithm (FS) has to consume massive computation, to calculate every search point in the search window for every block type with multiple reference frame. Some mathematical analyses on edge block are presented...
A 1D full search variable block sizes motion estimation (VBSME) architecture is presented in this paper. By properly choosing the partial sum of absolute differences (SAD) registers and scheduling the add operations, the architecture can be implemented with simple control logic and regular workflow. Moreover, only one single-port SRAM is required to store the search area and then reduces 72.7% hardware...
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