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Intelligent virtual reference frame generation method

A technology of virtual reference and reference frame, applied in the field of 3D video coding and deep learning, which can solve the problems such as the need to further improve the coding efficiency and the lack of multi-view video coding methods.

Active Publication Date: 2021-06-08
TIANJIN UNIV
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  • Application Information

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Problems solved by technology

[0006] Compared with the successful application of deep learning in the field of 2D video coding, there is still a lack of multi-view video coding methods based on deep learning technology; the existing inter-view predictive coding tools for 3D-HEVC do not make full use of the disparity relationship between adjacent viewpoints. Coding efficiency still needs to be further improved

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Embodiment Construction

[0036] In order to make the purpose, technical solution and advantages of the present invention clearer, the implementation manners of the present invention will be further described in detail below.

[0037] The embodiment of the present invention provides an intelligent virtual reference frame generation method, builds a virtual reference frame generation network based on viewpoint synthesis, generates a high-quality virtual reference frame and provides a high-quality reference for the current coded frame, and improves prediction Accuracy, thereby improving the coding efficiency. Method flow see figure 1 , the method includes the following steps:

[0038] 1. Feature extraction

[0039] The temporal virtual reference frame F t and the inter-view reference frame F iv As the input of the virtual reference frame generation network, their features f are extracted separately using the same branch shared by the two parameters t ,f iv , the extraction process see figure 2 . ...

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Abstract

The invention discloses an intelligent virtual reference frame generation method, which comprises the following steps of: learning a parallax relationship by utilizing an alignment step based on viewpoint synthesis for the characteristics of a time domain virtual reference frame and an inter-viewpoint reference frame, aligning the inter-viewpoint reference frame with the time domain virtual reference frame according to the parallax relationship, generating an offset inter-viewpoint reference frame; fusing complementary information between the time domain virtual reference frame and the offset inter-viewpoint reference frame to generate a high-quality virtual reference frame; constructing a virtual reference frame generation network based on viewpoint synthesis, and constraining the training of the generation network by using two MSE loss functions. According to the invention, a high-quality reference is provided for the current coding frame, so that the prediction accuracy is improved, and the coding efficiency is improved.

Description

technical field [0001] The invention relates to the fields of 3D video coding and deep learning, in particular to an intelligent virtual reference frame generation method. Background technique [0002] Multi-viewpoint video is a typical representation of 3D video, which can provide viewers with an immersive stereoscopic feeling. In order to improve the compression efficiency of multi-viewpoint video, the international standard organization JCT-VC has launched the multi-viewpoint plus depth video coding standard 3D-HEVC. For multi-view video coding, 3D-HEVC not only uses HEVC (High Efficiency Video Coding) coding technology to eliminate temporal redundancy and spatial redundancy within the same view, but also introduces a variety of inter-view coding technologies to eliminate inter-view redundancy. In addition, the overall coding efficiency is effectively improved. [0003] The data volume of multi-view video is much larger than that of 2D video, which brings great challeng...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N13/161H04N13/194H04N19/132H04N19/182H04N19/31H04N19/50G06K9/46G06K9/62G06N3/04G06T7/00
CPCH04N13/161H04N13/194H04N19/132H04N19/182H04N19/31H04N19/50G06T7/97H04N2013/0081G06T2207/20081G06T2207/20084G06T2207/20228G06V10/454G06N3/045G06F18/253
Inventor 雷建军刘祥瑞张宗千潘兆庆彭勃
Owner TIANJIN UNIV
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