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Panoramic video compression method and device

A technology of panoramic video and compression method, applied in the field of video processing, can solve the problems of poor user experience and low compression efficiency of panoramic video, and achieve the effect of reducing bit rate, improving user experience, and improving compression efficiency

Active Publication Date: 2021-06-22
BEIJING QIYI CENTURY SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Embodiments of the present invention provide a panoramic video compression method and device to solve the problems of low compression efficiency and poor user experience of panoramic video

Method used

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  • Panoramic video compression method and device
  • Panoramic video compression method and device

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Embodiment 1

[0052] refer to figure 1 , shows a flow chart of steps of a panoramic video compression method according to Embodiment 1 of the present invention.

[0053] The panoramic video compression method of the embodiment of the present invention comprises the following steps:

[0054] Step 101, respectively determine the projection weight proportions of the coding tree units in the panoramic video in the panoramic video.

[0055] In the video coding process, coding is usually performed based on a coding tree unit (Coding Tree Unit, CTU), which is an independent coding unit in the coding process, so a video is usually divided into multiple coding tree units for coding.

[0056] In the embodiment of the present invention, for the coding tree units in the panoramic video, the projection weight ratio of each coding tree unit in the panoramic video is respectively determined. The specific determination method will be described in detail in the second embodiment below.

[0057] Step 102,...

Embodiment 2

[0066] refer to figure 2 , shows a flow chart of steps of a panoramic video compression method according to Embodiment 2 of the present invention.

[0067] The panoramic video compression method of the embodiment of the present invention comprises the following steps:

[0068] Step 201, respectively determine the projection weight proportions of the coding tree units in the panoramic video in the panoramic video.

[0069] ERP projection technology projects a spherical image onto a two-dimensional plane according to equally spaced longitudes and latitudes. refer to image 3 , which shows a schematic diagram of an ERP projection effect according to Embodiment 2 of the present invention. Depend on image 3 It can be seen that this projection method will cause oversampling and distortion in the polar regions, while the sampling density in the middle region is relatively uniform, resulting in low coding efficiency of the planar video obtained by using the ERP projection techno...

Embodiment 3

[0115] refer to Figure 5 , shows a structural block diagram of a panoramic video compression device according to Embodiment 3 of the present invention.

[0116] The panoramic video compression device of the embodiment of the present invention comprises the following modules:

[0117] Determining module 501, configured to respectively determine the projection weight ratio of each coding tree unit in the panoramic video in the panoramic video;

[0118] A conversion module 502, configured to convert the projection weight ratio into a quantization parameter difference corresponding to the coding tree unit;

[0119] An adjustment module 503, configured to increase quantization parameters corresponding to part of the coding tree units in the panoramic video according to the quantization parameter difference;

[0120] The compressing module 504 is configured to compress the respective coding tree units based on respective corresponding quantization parameters.

[0121] In the emb...

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Abstract

The present invention provides a panoramic video compression method and device to solve the problems of low compression efficiency of panoramic video and poor user experience. The method includes: respectively determining the projection weight ratios of the coding tree units in the panoramic video in the panoramic video; converting the projection weight ratios into quantization parameter differences corresponding to the coding tree units; according to the The quantization parameter difference increases the quantization parameters corresponding to some coding tree units in the panoramic video; and compresses the coding tree units based on the respective corresponding quantization parameters. The present invention can reduce the code rate of the panoramic video by increasing the quantization parameters corresponding to some coding tree units in the panoramic video, thereby improving the compression efficiency of the panoramic video and improving user experience.

Description

technical field [0001] The present invention relates to the technical field of video processing, in particular to a panoramic video compression method and device. Background technique [0002] VR (Virtual Reality, Virtual Reality) is a computer simulation technology that uses head-mounted devices to generate realistic images, sounds and other sensations to provide users with an immersive experience. Panoramic video (or spherical video, immersive video) is obtained by capturing video within a 360° range at the same moment by a panoramic camera. During the viewing process, viewers can see a full range of video and feel immersive. [0003] Existing encoding and storage technologies do not support the processing of panoramic videos, so panoramic videos need to be projected onto a two-dimensional plane for storage and encoding. There are various methods for projecting panoramic video onto a two-dimensional plane. The most common projection method is the spherical projection tec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/124H04N19/96H04N19/85
CPCH04N19/124H04N19/85H04N19/96
Inventor 颜明
Owner BEIJING QIYI CENTURY SCI & TECH CO LTD
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