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This paper proposes a frame level rate control scheme for HEVC based on support vector machine. Firstly, textual features of frames are extracted from video sequence. According to different complexities of textual features, support vector machine is chosen as a classifier for video classification. Secondly, a frame level rate control scheme is proposed to achieve higher coding efficiency based on...
In communication networks, the multi-constraint multicast communication is an important way to improve the efficiency of network operation and quality of service. Some heuristic algorithms are applied in solving multicast routing problem under multiple constraints, such as simulated annealing, genetic algorithm, ant colony algorithm and particle swarm optimization algorithm. However, these algorithms...
Antenna selection technology in MIMO diversity system can achieve almost the same diversity gain as omni-directional antenna without increasing the radio frequency link in system. Several drawbacks exist in commonly used diversity reception method since it only considers the intensity fading of signal rather than content analysis and comparison of signal. In this paper, we study the current wireless...
By analyzing the characteristics of degree zerotree, both the EZW wavelet coder and SPIHT wavelet coder have advantages and disadvantages. Combined with the characteristics of wavelet coefficients, a zerotree based on hybrid encoder program was found. With the wavelet zerotree definition, taking the pre-processing zerotree before the zerotree coding, the identification of suitable programs of zerotree...
Low-density parity-check (LDPC) code, with advantages in bit error rate performance and low complexity, is nowadays one of the most important codes in Distributed video coding (DVC). In this paper, a novel non-uniform LDPC-based approach for multi-bitplane is proposed in DVC. Apart from the existing LDPC encoding in DVC, this paper is dedicated to exploiting preferable code rate between correlated...
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