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An Improved Early Detection of all-zero DCT Coefficients for East 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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