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Fidelity range extensions of H.264/AVC adopt variable block size (VBS) transform techniques to employ 8 × 8/4 × 4 Hadamard transforms adaptively during the fractional motion estimation. In this literature, the hardwired VBS Hadamard transform accelerator is developed with the following contributions: 1) developed a hardware reusing scheme between 8 × 8 and 4 × 4 transforms within the architecture...
A GOP-based state extraction algorithm for scalable video coding (SVC) is proposed to improve the video streaming transmission efficiency and reconstructed quality. According to the scalable features and internal relationship of SVC enhancement layers, we put forward a novel state model, based on which the SVC bit streams extraction algorithm employing the rate-distortion optimization method is presented...
H.264/AVC outperforms the previous coding standards thanks to variable block size motion compensation (VBSMC) ranging from 4 × 4 to 16 × 16 in interframe coding. However, this new feature causes extremely high computation complexity when rate-distortion optimization(RDO) is performed using full mode decision. In this paper, we propose an adaptive fast block mode decision algorithm (AFBMD) leveraging...
Variable block size (VBS) transform technique is adopted in Fidelity Range Extensions (FRExt) of H.264/AVC, in which 8 ?? 8/4 ?? 4 Hadamard transforms are adaptively employed during the fractional motion estimation. The hardwired VBS Hadamard transform unit is developed by authors and the following contributions are described in this literature: (1) Hardware reusing scheme is adopted in the architecture...
H.264 adopts variable block size motion estimation and rate-distortion-optimization based mode decision to improve video quality and compression ratio. These techniques have made H.264 better than other existing video coding standards. However, they are computationally intensive and time-consuming. In this paper, a fast mode selection scheme is proposed for H.264 inter prediction. Firstly, the first...
The H.264 standard provides significantly high compression efficiency with multiple block size Motion Estimation adopted. However, the encoding time of Motion Estimation and Discrete Cosine Transform is dramatically increased as a result. An early mode decision algorithm is proposed in this paper to control the computation complexity. It derives a threshold to make mode decisions in advance. Experimental...
The rate-distortion optimization framework employed in H.264 for the selection of best coding mode is computationally expensive, although it achieves remarkable coding efficiency. In this paper, an integrated intra prediction algorithm for intra-frame coding of the H.264 high profile is proposed. It consists of two components: a variance-based method for macroblock mode decision and an improved filter-based...
In our previous work, we introduced spatially varying transforms (SVT) for video coding, where the location of the transform block within the macroblock is not fixed but varying. SVT has lower decoding complexity compared to standard methods as only a portion of the prediction error needs to be decoded. However, the encoding complexity of SVT can be relatively high because of the need to perform rate...
In this paper, a fast mode decision algorithm for intra prediction in the H.264/AVC is proposed. We use the characteristics of each directional prediction mode to compute the strength of directional differences in the original pixel domain to find the minimal direction error. This is the first time reported in the literature that the intrinsic differences between the real-data and the predictors of...
In order to facilitate the H.264/AVC implementation in application system with low bit rate; its coding algorithm should be optimized. In this paper, through analysis of the motion vector distribution in the video image and the serial search strategy, a type of parallel program based on the cross search algorithm is presented, designed and implemented. Finally this design program is played in the...
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...
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