Video decoding method, video encoding method and terminal

Abstract

The invention discloses a video decoding method, a video encoding method and a terminal. The decoding method comprises the following steps of: acquiring an initial candidate motion vector set of a current decoding block; removing candidate motion vectors which do not accord with preset conditions from the initial candidate motion vector set and forming a new initial candidate motion vector set by the rest of candidate motion vectors; and decoding according to the new initial candidate motion vector set. In the embodiment of the invention, a plurality of motion vectors can be removed from the candidate motion vector set according to the preset conditions; under the condition that the number of the candidate motion vectors is reduced, the number of reconstructed pixel information in a reference frame, which is obtained according to each candidate motion vector, is also correspondingly reduced; and meanwhile, the candidate motion vectors are closer to each other and adopted reference blocks are overlapped, so that the reference blocks can be repeatedly used, and thus, the frequency degree on reading a memory is reduced, the hardware design is simplified and the encoding and decoding performances are also improved.

Description

technical field [0001] The present application relates to the field of communication technologies, and in particular, to a video decoding method, an encoding method and a terminal. Background technique [0002] Motion prediction and motion compensation are important technologies in video compression. Part of the bits in the video compression code stream are used to transmit motion vector information, especially in the case of low bit rates. The bits usually exceed 50% of the total bits of the code stream. For the video coding of continuous dynamic images, several consecutive images are divided into three types: P, B, and I. Taking B frame as an example, it is based on the difference between the data of the adjacent previous frame, this frame, and the next frame. Compressing the current frame, that is, the B frame can obtain a motion vector set according to its previous frame and the next frame. Therefore, in order to improve the coding efficiency, in the prior art, the mot...

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Problems solved by technology

[0005] The embodiment of the present application provides a video decoding method, an encoding method, and a terminal to solve the problem that the existing large number of candidate motion vectors leads to frequent reading of memory and reduces the performance of encoding and decoding

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