A h.264 motion video encoding method and system suitable for high-speed aircraft

Abstract

A kind of H.264 motion video coding method that is applicable to high-speed aircraft, described method is deployed in aircraft video coding system, and aircraft video coding system comprises aircraft and IMU sensor, and H.264 motion video coding method comprises the following steps: Step A: The current frame image acquired by the aircraft is divided into several macroblocks; step B: obtain the search range of each macroblock in the reference frame, and obtain the best match between each macroblock and the search range within the search range block; step C: obtain the current motion vector of each macroblock; step D: obtain the residual through the macroblock and the best matching block; step E: obtain the reconstruction of each frame by encoding the residual and the motion vector Image, through the different motion intensities of the front aircraft, select the corresponding search template, search starting point and search range, improve the accuracy of the search, improve the efficiency of the search, reduce unnecessary searches, and greatly improve the efficiency of video coding.

Description

A H.264 motion video coding method and system suitable for high-speed aircraft technical field Invention relates to H.264 video coding technical field, especially a kind of H.264 motion video that is applicable to high-speed aircraft Frequency coding method and system. Background technique Motion estimation is an important part of inter-frame prediction in video coding technology, and its main idea is to The frame image is divided into macroblocks of a certain size, the best matching block is obtained by searching the reference image, and the macroblock and the matching block are compared. The displacement between the macroblocks is used as the motion vector, and the pixel difference between the macroblock and the matching block is used as the residual. Due to motion vectors and residual numbers The number of bits occupied by the data is much smaller than the number of bits occupied by the current block, so motion vectors, residual data and reference frames can be u...

AI Technical Summary

Problems solved by technology

Existing motion estimation algorithms include full search method, three-step method, diamond search method, UMHexagonS algorithm, etc., which have problems such as high computational complexity, low matching accuracy, easy to fall into local optimum, and single search mode. Existing technologies do not fully consider the information of the intensity and direction of the aircraft's movement, and conduct a large number of unnecessary searches, and the search template is relatively fixed. Facing scenes with violent movements, it often takes a lot of time to find the best matching block.

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