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A Hierarchical Residual Light Field Video Coding Method

A video encoding and video decoding technology, applied in the field of light field encoding, can solve the problems of low resolution of light field cameras and insufficient encoding efficiency, so as to improve encoding efficiency, increase the number of residual sub-videos, and reduce the total code stream Effect

Active Publication Date: 2021-10-29
HANGZHOU DIANZI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This has attracted many researchers and companies to invest huge resources in research. Some companies are committed to developing consumer-grade light field cameras. Limited by the current hardware level, the problem of low resolution of light field cameras has always existed.
The main problem of the existing technology is that the coding efficiency is not efficient enough

Method used

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  • A Hierarchical Residual Light Field Video Coding Method
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  • A Hierarchical Residual Light Field Video Coding Method

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Embodiment Construction

[0018] The present invention will be further described below in conjunction with drawings and embodiments.

[0019] Such as Figure 1-4 As shown, a hierarchical residual light field video coding method, the steps are as follows:

[0020] Step (1), light field video image preprocessing.

[0021] The light field video includes N frames, that is, N light field images. The number of sub-images in a single light field image is (n-i)×(n-i), where i=0, 1 or 2, and the number of sub-images varies with different light field camera lenses. The number of arrays varies.

[0022] 1-1. In order to facilitate the subsequent block, first process the number of sub-images:

[0023] When the remainder of n to 3 is 0, i=0, and n×n quantum images are used;

[0024] When n is 1 when the remainder of 3 is taken, i=1, the sub-image located in the first row and the first column is removed, and (n-1)×(n-1) number sub-image is adopted;

[0025] When the remainder of n to 3 is 2, i=2, remove the fir...

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Abstract

The invention provides a hierarchical residual light field video encoding method. The present invention performs hierarchical coding on the central viewpoint video on the basis of hierarchically encoded central viewpoint video and residual video. The difference video, and then the secondary center view residual video is encoded, and finally the encoded central view video is decoded and then subtracted from the corresponding adjacent view video to obtain a residual video for encoding. The present invention reduces the number of directly coded sub-videos and increases the number of residual sub-videos by grading the central viewpoint video, so the total code stream can be effectively reduced and the coding efficiency can be improved.

Description

technical field [0001] The invention belongs to the field of light field coding, especially for light field video, mainly for improving the compression efficiency of the coding process, and specifically relates to a hierarchical residual light field video coding method. Background technique [0002] The field of light field is a field full of imagination. If light field technology can be fully applied to the still developing fields such as VR and AR, it will accelerate the maturity of technologies in these fields. This has attracted many researchers and companies to invest huge resources in research. Some companies are committed to developing consumer-grade light field cameras, but limited by the current hardware level, the problem of low resolution of light field cameras has always existed. [0003] In the current Internet era, there is a huge market for Internet-based video consumption: short videos, Internet entertainment consumption content, and live broadcasts. Constra...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/597H04N19/42H04N21/2343H04N21/4402
CPCH04N21/2343H04N21/4402H04N19/42H04N19/597
Inventor 颜成钢涂望金欣孙垚棋张继勇张勇东
Owner HANGZHOU DIANZI UNIV