Efficient Fast Algorithm of DCT for H.264/AVC

This paper presents an efficient fast algorithm to reduce redundant discrete cosine transform (DCT) and quantization computations for H.264/AVC encoding optimization. A mathematic model is established based on analyzing residual coefficients distribution and considering the properties of DCT coefficients’ energy distribution. The experimental results demonstrate that the proposed approach can achieve the best performance in reducing the DCT and quantization(Q) computations and obtain almost the same video quality as the original encoder in H.264/AVC.