Vision attention based video encoding method
A video coding and visual attention technology, applied in image coding, pulse modulation TV signal transmission, image data processing, etc., can solve problems such as large amount of calculation and difficult application
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[0052] A preferred implementation of the present invention is as follows:
[0053] Referring to Fig. 1, the present invention is a video coding method based on visual attention. Firstly, based on the local motion, texture activity and edge strength of macroblocks, the local motion macroblocks, edge macroblocks, texture macroblocks and smooth macroblocks are quickly segmented.
[0054] Next, the quantization parameters of the macroblocks are adjusted based on the difference in human vision's attention to various types of macroblocks. The method improves the subjective quality of the video and at the same time reduces the code rate by about 10%.
[0055] The steps are:
[0056] (1) Rapid segmentation of macroblocks with local motion: extract the motion vector of the macroblock at the same position in the previous frame, and calculate the local motion of each macroblock and the threshold value Thr of motion by formulas (1) and (2) m , if the local motion of the macroblock is g...
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