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Video encoding and decoding method and method and device for inter-frame prediction

A video codec and inter-frame prediction technology, applied in the field of digital video codec, can solve the problems of poor compression efficiency, lens distortion and inter-frame prediction performance, and achieve the effect of improving performance, compression efficiency and accuracy

Active Publication Date: 2019-05-21
PEKING UNIV SHENZHEN GRADUATE SCHOOL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] This application provides a video encoding and decoding method and its inter-frame prediction method and device, which solves the problems of poor inter-frame prediction performance and poor compression efficiency in the video encoding and decoding process with severe lens distortion

Method used

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  • Video encoding and decoding method and method and device for inter-frame prediction
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  • Video encoding and decoding method and method and device for inter-frame prediction

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Experimental program
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Embodiment 1

[0052] Please refer to figure 2 , the present embodiment provides a panoramic video encoding method, comprising the following steps:

[0053] Step 1.1: Divide the current image into several image blocks. Specifically, the size of the segmented image block may be selected according to actual requirements.

[0054] Step 1.2: Obtain the motion vector (MV) of the current image block through motion estimation x , MV y ).

[0055] Specifically, motion estimation adopts any feasible method in the prior art.

[0056] Step 1.3: Obtain the predicted image block through inter-frame prediction.

[0057] Please refer to image 3 , in this embodiment, the inter prediction method includes the following steps:

[0058]Step 2.1: Obtain the motion vector of the current image block and the relevant spatial position information of the current pixel.

[0059] Step 2.2: Obtain the motion vector of the current pixel according to the motion vector of the current image block and the relevant ...

Embodiment 2

[0078] Please refer to Figure 5 Based on the inter-frame prediction method for panoramic video encoding and decoding provided in the first embodiment above, this embodiment also provides an inter-frame prediction device for panoramic video encoding and decoding, including an information acquisition module 101, a calculation module 102 and prediction module 103 .

[0079] The information acquisition module 101 is used to acquire the motion vector of the current image block and the relevant spatial position information of the current pixel.

[0080] The calculation module 102 is used to obtain the motion vector of the current pixel according to the motion vector of the current image block and the relevant spatial position information of the current pixel.

[0081] In this embodiment, the relevant spatial position information of the current pixel includes the size of the current image, the coordinates of the current image block in the current image, the size of the current imag...

Embodiment 3

[0097] Please refer to Image 6 , the present embodiment provides a panoramic video decoding method, comprising the following steps:

[0098] Step 3.1: Perform entropy decoding, inverse quantization, and inverse transformation on the coded code stream to obtain a reconstructed residual block.

[0099] Step 3.2: Obtain the predicted image block through inter-frame prediction.

[0100] Please refer to image 3 , in this embodiment, the inter prediction method includes the following steps:

[0101] Step 2.1: Obtain the motion vector of the current image block and the relevant spatial position information of the current pixel.

[0102] Step 2.2: Obtain the motion vector of the current pixel according to the motion vector of the current image block and the relevant spatial position information of the current pixel. Specifically, the motion vector of the current image block can be obtained through motion estimation.

[0103] In this embodiment, the relevant spatial position inf...

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Abstract

The invention provides a video encoding method, a video decoding method as well as an inter-frame prediction method and device thereof, wherein the inter-frame prediction method comprises the steps: obtaining a motion vector of a current image block and related space position information of a current pixel; acquiring a motion vector of the current pixel according to the motion vector of the current image block and the related space position information of the current pixel; acquiring a prediction value of the current pixel according to the acquired motion vector of the current pixel. Therefore, in an inter-frame prediction process, not only the motion vector of the current image block, but also the related space position information of the current pixel are considered; different lens distortion features and enlargement / shrinkage situations, which occur when an object moves in a frame, can be adapted, so that the accuracy for computing the motion vector of the pixel is improved, and performances of inter-frame prediction and compression efficiency in a video encoding or decoding process are improved.

Description

technical field [0001] The present application relates to the technical field of digital video coding and decoding, and in particular to a video coding and decoding method and an inter-frame prediction method and device thereof. Background technique [0002] Currently, virtual reality technology and related applications are developing rapidly. In virtual reality technology, panoramic images and panoramic videos are an important part. Because the panoramic video records all the pictures of the 360-degree viewing angle and has a very high data volume, the compression of the panoramic video is a key technology in the application of virtual reality. As an emerging media, panoramic video has the characteristics of large field of view, high resolution, and large amount of data compared with traditional video. With the panoramic video, the viewer's point of view remains unchanged, and the entire surrounding scene can be observed by changing the observation direction, while the or...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/503H04N19/176H04N19/59H04N19/513
CPCH04N19/176H04N19/503H04N19/513H04N19/59
Inventor 王振宇王荣刚姜秀宝高文
Owner PEKING UNIV SHENZHEN GRADUATE SCHOOL