An Early Decision Algorithm for High-Profile H.264 Intra Prediction
Shih‐Chang Hsia, Chao‐Lieh Chen, Yen‐Hung Shih · 2018
This paper presents a fast-efficient intra-prediction algorithm for high-profile H.264 encoder. The pre-decision algorithm is proposed to reject the impossible block size based on image variance before enter to the coding kernel. The decision rule can be classified to five cases, which can quickly classify the coding region to select the possible block size for coding modes. The threshold is adaptive computation for various image features. Results show that the proposed algorithm can reduce about 40% computational time on average when the coding bit increases only 0.56% and PSNR drops only -0.02dB.