Efficient prediction method of integer DCT coefficients for H.264/AVC
Wu Feng · Computer Engineering and Applications Journal · 2008
This paper presents a novel efficient prediction method to reduce redundant Discrete Cosine Transform(DCT) and quantization computations for H.264 encoding optimization.Through theoretical analysis,three transform dynamic distribution coefficient of Normal4×4,LumaDC4×4 and ChramaDC2×2 are studied,and the sufficient condition for DCT coefficients to be quantized to zeros is studied.As a result,three sufficient conditions corresponding to three types of transform and quantization methods in H.264 are proposed.Compared with other method in the literature,the proposed method derives more precise and efficient conditions to predict zero quantized DCT coefficients.Both the theoretical analysis and experimental results demonstrate that the proposed algorithm is superior to other algorithms in terms of the computational complexity reduction,encoded video quality,false acceptance rate,and false rejection rate.