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This paper presents an efficient method in deciding macro-block mode and selecting prediction mode for intra prediction in H.264/AVC high profile. H.264/AVC supports nine intra prediction modes for luminance 4x4 and 8x8 blocks. The predictors include 8 directional modes and intra DC mode, which is non-directional mode. For luminance 16x16 blocks, the following 4 intra prediction modes are used: Vertical,...
In this paper, we propose a novel energy reduction technique for H.264 intra mode decision. The proposed technique reduces the number of additions performed by Sum of Absolute Transformed Difference based 4×4, 16×16 and 8×8 intra mode decision algorithms used in H.264 joint model reference software encoder by 46%, 43% and 42% respectively for a CIF size frame without any PSNR loss. We also implemented...
It is challenging to achieve graceful quality degradation in an error-prone environment,since channel errors can drastically deteriorate the quality of the video, classical error concealment schemes commonly utilize surrounding correctly reconstructed frame or motion information for concealment. In this paper, An efficient spatio-tempral boundary matching algorithm (STBMA) is proposed to recover the...
RGB color signals encoding is more desirable for high resolution and accurate definition for saturations and hue. This paper presents a region adaptive inter-color prediction scheme for 4:4:4 RGB signals, which treats G component as a primary component and predicts B/R component from G component with different weighting factors based on different texture regions. The proposed algorithm demonstrates...
This paper proposes a fast inter prediction mode decision method for H.264. Motion compensation residuals of macroblock are used to analyze motion characteristics of each portion, and reduce the candidate inter modes to a small subset. Compared with the exhaustive mode search, the proposed method achieves an average 63% reduction in computation time with negligible degradation in visual quality. Compared...
A new fast mode decision (FMD) algorithm for multi-view video coding (MVC) is presented. The codification of the views is based on the analysis of the homogeneity of the depth map and corrected with the motion analysis of a reference view, which is encoded based on traditional methods and on the use of the disparity differences between the views. This approach reduces the burden of the rate-distortion...
The H.264 video coding standard adopts many new coding tools, such as variable block size, multiple reference frames, quarter-pixel-accuracy motion estimation, intra prediction, loop filter, etc. Using these coding tools, H.264 achieves significant performance. Especially for reference frame, block size, and predication direction, it can adaptively do the selection. However, the encoding complexity...
A new diamond fast motion estimation algorithm diamond for H.264 was proposed. The algorithm uses the adjacent macro block motion vectors in the spatial correlation of the neighboring macroblocks motion vectors to predict, cross template search step size can be acquired, and lots of calculation of the large diamond-shaped template (LDSP) will be reduced. Experimental results show that the calculation...
In video encoding, there are seven block sizes used for inter-frame motion estimation/compensation for H.264.However, this feature requires the encoder to compute the rate-distortion cost for every available block mode. As a result, the complexity and computation load of video coding increase drastically. In this paper, a new fast inter mode decision method for H.264 coding standard was presented...
This paper presents an improved fast fractional pel motion estimation algorithm for H.264. First, to skip inefficient fractional pel search, smooth macro-block prediction algorithm is proposed. Then, to further reduce the computation load of H.264 fractional pel motion estimation, an extended diamond pattern search algorithm based on predicted motion vector is proposed. The simulation result shows...
Motion estimation plays a key role in the H.264. It is the most computationally intensive module. In this paper, we proposed a novel adaptive cross-diamond search (ACDS) algorithm for fast block motion estimation in H.264. The proposed algorithm adaptively chooses different search pattern according to the seven types of macro block division in H.264 and the motion vector distribution characteristics...
Motion estimation is one of the key technologies in inner-frame estimation encoding of video compression. In all kinds of compression standard, motion estimation based on block is used widely. The H.264 was a kind of new generation video compression standard. In order to reduce the computational complexity of the motion estimation and improve the accuracy of motion compensation, a new search algorithm...
H.264, MPEG-4 Part 10, is the latest digital video coding standard that is noted for achieving very high data compression by using several new coding features. One of the key features is the intra prediction based on the rate distortion optimization (RDO) procedure, which requires a true encoding of the intra block by trying all intra prediction modes. The computational burden of intra prediction...
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