Fundamentals of digital image processing
Fundamentals of digital image processing
Source coding with channel, distortion, and complexity constraints
Source coding with channel, distortion, and complexity constraints
Fast algorithms for the discrete cosine transform
IEEE Transactions on Signal Processing
Modeling DCT coefficients for fast video encoding
IEEE Transactions on Circuits and Systems for Video Technology
Scalable variable complexity approximate forward DCT
IEEE Transactions on Circuits and Systems for Video Technology
An improved early detection algorithm for all-zero blocks in H.264 video encoding
IEEE Transactions on Circuits and Systems for Video Technology
Complexity control of H.264/AVC based on mode-conditional cost probability distributions
IEEE Transactions on Multimedia - Special section on communities and media computing
EURASIP Journal on Advances in Signal Processing - Special issue on quantization of VLSI digital signal processing systems
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A new integer 4x4 transform is adopted in the new video coding standard H.264/AVC. It consumes a big account of computation of a real-time encoder. To reduce the computation load of the new transform, pruned DCT algorithm is applied. To avoid serious encoding performance loss, a new condition is derived based on statistical sum of absolute value test(SSAVT) to identify pruned block adaptively. Considering the variance of DCT coefficients' contribution, a novel efficient model based on statistical analysis is proposed. To achieve further control on DCT complexity and a good tradeoff between performance and computation load, a scheme to control the complexity of DCT is presented. Simulation results show that the novel statistical model can save more computation, so it is chose to control DCT complexity. Simulation results show that the complexity controllable scheme can control the complexity of DCT within the specified target with negligible encoding performance loss.