AN EARLY DETECTION OF ALL-ZERO DCT BLOCKS IN H.264 (MA-P6)

Author(s) : Gyu Yeong Kim (Department of Electronics Engineering, Pusan National University, South Korea) Yong Ho Moon (Division of Digital and Information Engineering, Pusan University of Foreign Studies, South Korea) Jae Ho Kim (Department of Electronics Engineering, Pusan National University, South Korea)

Abstract : In this paper, an improved algorithm for the early detection of all-zero DCT blocks in H.264 video encoding is proposed. We have analyzed the properties of the DCT and quantization in H.264 and derived the sufficient condition under which each quantized DCT coefficient becomes zero. These theoretical analyses show that a great reduction in the number of calculations can be achieved by investigating the individual conditions for the frequency components of (1,1), (1,3), (3,1), and (3,3). Based on these facts, a more precise sufficient condition is proposed by modifying the calculation order of the minimum SAD.

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