Inter-frame motion estimation method, device, electronic equipment and readable storage medium

Abstract

Embodiments of the present application provide an inter-frame motion estimation method, device, electronic equipment, and readable storage medium. Inter-frame motion estimation is performed on inter-frame predictively coded frames of a video stream to be compressed, and each searched inter-frame predictively coded frame After the integer pixels corresponding to a macroblock are searched for multiple half-pixels corresponding to the integer pixels, when the motion estimation cost of a certain first half-pixel is found to be smaller than that of the whole pixel, the first half-pixel is searched based on the first half-pixel The pixel is the origin, and after at least one iterative period of half-pixel search, after obtaining the target half-pixel of the macroblock, the target half-pixel is used as the origin to search for corresponding multiple 1 / 4 pixel points for the macroblock Perform inter-frame motion estimation. In this way, the above method of hierarchical search can perform inter-frame motion estimation within a certain range of pixels, avoiding the high computational complexity of exhaustive search, and can reduce the amount of calculation as much as possible and improve the calculation speed while ensuring the quality of rate-distortion optimization.

Description

technical field [0001] The present application relates to the technical field of video compression, in particular, to an inter-frame motion estimation method, device, electronic equipment and readable storage medium. Background technique [0002] With the rapid development of Internet technology and the increase of user demand for high-definition video, the video data volume of video multimedia is also increasing. If video data is uncompressed, it is difficult to apply to actual storage and transmission. Based on this, video compression and decoding technology can help remove redundant information in video data, so as to realize fast transmission and offline storage of video data on the Internet. [0003] There are many optimization features in the X264 encoder, one of the most important optimization features is rate-distortion optimization. Rate-distortion ensures the best compromise between bit rate and distortion, so it can provide the highest possible rate under the con...

AI Technical Summary

Problems solved by technology

The X264 encoder provides rate-distortion costs of different strengths. The higher the rate-distortion cost intensity, the better the rate-distortion optimization, but the calculation speed is slower.

If the calculation speed is too slow, it is very likely to reduce the encoding performance and cause frame loss during the compression process, seriously affecting the user viewing experience

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