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An Improved Early Detection of all-zero DCT Coefficients for fast Video Encoding  

김규영 (부산대학교 일반대학원 전자공학과)
문용호 (부산외국어대학교 정보과학대학 디지털정보공학부)
김재호 (부산대학교 일반대학원 전자공학과)
Abstract
In this paper, we propose an improved early detection of all-zero DCT coefficients for fast video encoding. From the experimental observation, it is shown that the performance of the conventional method is limited because of the imprecision sufficient condition. When the calculation of the SAD in motion estimation is simply modified, more precise sufficient condition is derived from the theoretical analysis. Based on this idea, DCT and the quantization stages are effectively skipped in the proposed algorithm with no image degradation. The simulation results show that the proposed algorithm achieves computational saving over 10% compared to the conventional method.
Keywords
DCT; SAD; Early Detection; Computational Complexity; H.264;
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1 Efficient method for early detection of all-zero DCT coefficients /
[ Shi Jun;Songyu Yu ] / Electronics Letters   ScienceOn
2 Advanced Video Coding, Final Committee Draft,Doc. JVT-E022 /
[] / ITU-T Rec. H.264 / ISO/IEC 11496-10
3 Low complexity transform and quantization /
[ A.Hallapouro;M.Karczewicz;H.Malvar ] / JVT of ISO/IEO MPEG and ITU-T VCEG, Docs. JVT-B038 and JVT-B039
4 고속 비디오 코딩을 위한 효율적인 DCT 계산 방식 /
[ 문용호 ] / 한국 통신 학회 논문지
5 Hardware-software coimplementation of a H.263 video codec /
[ S.K.Jang;S.D.Kim;J.Lee;G.Y.Choi;J.b.Ra ] / IEEE Transactions on Consumer Electronics   ScienceOn
6 Method for detecting all-zero DCT coefficients ahead of discrete cosine transformation and quantisation /
[ Zhou Xuan;Yu Zhenghua;Yu Songyu ] / Electeronics Letters   ScienceOn
7 Video Coding for Low Bitrate Communication /
[ ITU-T ] / Draft Recommendation H.263
8 General method for eliminatin redundant computations in video coding /
[ L.A.Sousa ] / Electronics Letters   ScienceOn
9 MPEG-2 video, ITU-T Recommendation H.262 /
[] / ISO/IECI13818-2