Fast Intra Prediction Algorithm for H.264 High Profile Based on Image Texture

Abstract

H.264/AVC standard uses rate-distortion optimization framework with heavy calculation and full search algorithm to select the best mode of each macroblock. Besides, 8×8 luma block prediction is added to high profile, which makes the search algorithm process more complicated. In order to reduce the amount of calculation, a filter method based on image texture feature and image complexity is adopted in this paper. Experiment results show that the new algorithm achieves an average saving of 43%-57% in encoding time ,with negligible effect on bitrate and PSNR.

An Improved Direct Current Prediction Method for Intra Coding

“…The first block which is near the reference pixels is coded the same as in H.264/AVC while the other block is coded by using the reference pixels coded in the first block. Though these methods improve the DC mode to some degree, the gain is limited and their methods also cause the trouble of additional time consumption [6,7].…”