Video sequence image encoding and decoding method and device
A technology of image decoding and video sequence, applied in the field of video images, can solve the problem of high computational complexity of DMVR technology
Active Publication Date: 2021-06-01
HUAWEI TECH CO LTD
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[0004] However, the computational complexity of the DMVR technique is too high
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[0098] In order to make the purpose, technical solutions and advantages of this application clearer, the technical solutions in this application will be clearly and completely described below in conjunction with the accompanying drawings in this application. Obviously, the described embodiments are part of the embodiments of this application , but not all examples. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of this application.
[0099] The flow of the image coding method for inter-frame prediction in the DMVR technology is as follows:
[0100] 1. Determine the motion information of the block to be encoded, where the motion information includes a predicted motion vector and reference image information, and the reference image information is used to identify the predicted reference image block.
[0101] Wherein, the block to be encoded is an image...
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The present application provides an image encoding and decoding method and device for a video sequence. The image decoding method of the present application includes: determining the motion information of the block to be decoded; obtaining the first decoded prediction block of the block to be decoded according to the motion information; performing a first-precision motion search in the prediction reference image block to obtain at least two second Decoding the prediction block; down-sampling the first decoding prediction block to obtain a first sampling pixel matrix; performing down-sampling on at least two second decoding prediction blocks to obtain at least two second sampling pixel matrices; respectively calculating the first The difference between the sampled pixel matrix and each second sampled pixel matrix, and the motion vector corresponding to the second sampled pixel matrix with the smallest difference as the target predicted motion vector; obtain the target decoding prediction of the block to be decoded according to the target predicted motion vector block, and decode the block to be decoded according to the target decoding prediction block. The present application reduces the calculation amount of difference comparison and improves image coding efficiency.
Description
technical field [0001] The present application relates to video image technology, and in particular to an image encoding and decoding method and device for a video sequence. Background technique [0002] In the video coding and decoding framework, hybrid coding structures are usually used for the coding and decoding of video sequences. The coding end of the hybrid coding structure usually includes: prediction module, transformation module, quantization module and entropy coding module; the decoding side of the hybrid coding structure usually includes: entropy decoding module, inverse quantization module, inverse transformation module and prediction compensation module. The combination of these encoding and decoding modules can effectively remove the redundant information of the video sequence, and can ensure that the coded image of the video sequence is obtained at the decoding end. In the framework of video encoding and decoding, images of a video sequence are usually divi...
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IPC IPC(8): H04N19/132H04N19/176H04N19/137H04N19/577H04N19/523H04N19/503H04N19/513
CPCH04N19/132H04N19/176H04N19/137H04N19/577H04N19/523H04N19/503H04N19/513H04N19/59H04N19/44H04N19/56H04N19/105
Inventor 陈旭郑建铧
Owner HUAWEI TECH CO LTD