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In this paper, a real-time entropy decoder for HD video is designed, the whole decoding process is controlled under a finite state machine and the codeword is divided into three parts such as SPS/PPS/SliceHeader, CAVLC and EXP-Golomb. Due to variable length code, the five syntax elements of CAVLC will be parsed step by step. In the proposed implementation, a look-up table algorithm based on pos (the...
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...
Intra-frame plays a significant role in controlling video quality for H.264/AVC rate control. In this paper, we present an adaptive current buffer fullness ratio-based intra-frame rate control for H.264/AVC. The proposed algorithm adaptively adjusts the quantization step (QP) of the intra-frame by taking current buffer fullness ratio and scene change into consideration. Experimental results show that...
H.264 video applications based on mobile handheld devices are becoming more and more popular. How to protect the security has become an important topic. However, the significant power consumption of video encryption algorithms executing the limited battery capacity of handheld devices restricts the abroad use. In this paper, we propose a low power partial encryption scheme based on H.264, it combines...
In this paper, a real-time CAVLC decoder for HD video is designed. The whole decoding process is controlled under a finite state machine with ten states. Due to variable length code, the five syntax elements will be parsed step by step. In the proposed scheme, we exploit a look-up table algorithm based on pos (the number of zero) and may be divided into sub-table according to priority in the same...
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