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

Abstract

The embodiment of the invention provides an inter-frame motion estimation method and device, electronic equipment and a readable storage medium. The method includes: carrying out inter-frame motion estimation on an inter-frame prediction coding frame of a to-be-compressed video stream; searching a plurality of corresponding half-pixel points by taking an integer pixel point as an original point after the integer pixel point corresponding to each macro block in the inter-frame prediction coding frame is searched; when the motion estimation cost of a certain searched first half pixel point is lower than that of the whole pixel point, taking the first half pixel point as an original point, performing half pixel point search of at least one iteration period to obtain a target half pixel pointof the macro block, and then taking the target half pixel point as the original point to search a plurality of corresponding 1 / 4 pixel points so as to perform inter-frame motion estimation on the macro block. In this way, the inter-frame motion estimation can be carried out in a certain pixel point range in a hierarchical search mode, the high calculation complexity of exhaustive search is avoided, the calculation amount can be reduced as much as possible while the rate distortion optimization quality is ensured, and the calculation speed is increased.

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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