Video coding and decoding method, and video coding and decoding device

Abstract

The embodiment of the invention discloses a video coding and decoding method, and a video coding and decoding device. The method disclosed by the embodiment of the invention comprises the following steps: acquiring a current image, and obtaining motion vector precision of the current image according to the current image, wherein the motion vector precision comprises a search step length set, and each search step length in the search step length set is smaller than a pixel unit; obtaining a current block and a reference image of the current block; determining a search starting point in the reference image, and searching a target integral pixel point starting from the search starting point with one pixel unit as the search step length; searching a matched block of the current block starting from the target integral pixel point according to the motion vector precision; and obtaining motion vector information and a predicted residual signal, and writing the information of the reference image, the motion vector information and the predicted residual signal in code stream, wherein the information of the reference image is used for indicating the reference image. By adoption of the video coding and decoding method disclosed by the embodiment of the invention, coding and decoding can be carried out in combination with video characteristics.

Description

technical field [0001] The present invention relates to the technical field of image processing, in particular to a video encoding and decoding method, and a video encoding and decoding device. Background technique [0002] With the rapid development of Internet technology and the increasingly rich material and spiritual culture of people, there are more and more requirements for video applications on the Internet, especially for high-definition video applications, and the data volume of high-definition video is very large. To be able to transmit in the Internet with limited bandwidth, the problem that must be solved first is the problem of high-definition video compression and encoding. At present, there are two international organizations dedicated to the formulation of video coding standards, namely the International Organization for Standardization (International Organization for Standardization, referred to as "ISO") / International Electrotechnical Commission (Internatio...

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Problems solved by technology

[0006] However, the inventors of the present application found that for video sequences with different content characteristics, the use of fixed motion vector precision is not conducive to the encoding of video sequences

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