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Panorama video adaptive transmission method based on DASH (Dynamic Adaptive Streaming over HTTP)

An adaptive transmission and panoramic video technology, which is applied in the field of DASH-based panoramic video adaptive transmission, can solve the problems that users cannot watch video content, and achieve the effect of ensuring video content quality, satisfying immersion, and improving QoE

Active Publication Date: 2018-06-29
CHONGQING UNIV OF POSTS & TELECOMM
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AI Technical Summary

Problems solved by technology

Yanan Bao et al. analyzed the historical viewing data of 150 users, and proposed a method based on motion prediction to transmit only the part that the user may watch, but when the prediction is inaccurate, the user will not be able to watch the video content

Method used

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  • Panorama video adaptive transmission method based on DASH (Dynamic Adaptive Streaming over HTTP)
  • Panorama video adaptive transmission method based on DASH (Dynamic Adaptive Streaming over HTTP)
  • Panorama video adaptive transmission method based on DASH (Dynamic Adaptive Streaming over HTTP)

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Embodiment Construction

[0034] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0035] figure 1 is a structural schematic diagram of the panoramic video adaptive transmission system of the present invention, figure 2 For the flowchart of the present invention, refer to figure 1 , 2 Shown, the panoramic video adaptive transmission method based on DASH comprises the following steps:

[0036] Step 1: According to the characteristics of human vision and head movement: the range of horizontal viewing angle and vertical viewing angle is about 120 degrees, which is the best three-dimensional area, and the range of motion of the human head in the horizontal direction and vertical direction is 60 degrees and 30 degrees respectively. The 3D panoramic video is divided into three quality priority areas. The 120-degree area where the user window is located is the best quality priority area, and the 60-degree left and right 60-d...

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Abstract

The invention relates to a panorama video adaptive transmission method based on DASH (Dynamic Adaptive Streaming over HTTP) and belongs to the technical field of panorama video transmission. The method comprises the steps that a mapping relationship model of a three-dimensional panorama video and a two-dimensional plane panorama video is established; region priority division is carried out on thepanorama video based on vision and motion characteristics of a human body; a server slices the panorama video; a client bandwidth estimation module carries out available bandwidth prediction through utilization of a Kalman filtering algorithm; a client video buffer module smoothens available bandwidths based on a buffer area state; a client user window sensing module predicts a user window based on motion inertia; and a client decision-making module adaptively transmits the panorama video by taking a network environment, a buffer area state and the user window into comprehensive consideration.Compared with a traditional video transmission method, the method has the advantages that the network environment, the buffer area state and the user window are taken into comprehensive consideration, and the user quality of experience (QoE) is improved.

Description

technical field [0001] The invention belongs to the technical field of panoramic video transmission, and relates to a DASH-based panoramic video adaptive transmission method. Background technique [0002] With the rapid development of information technology, virtual reality (VR) has been continuously popularized and promoted, and has a broad market prospect. VR panoramic video is composed of 360-degree all-round video screens. Users can use head-mounted displays (head-mounted displays, HMDs) to choose any angle to watch content of interest and obtain immersive sense of experience. Compared with traditional video, panoramic video has a huge amount of data, how to transmit panoramic video in a network environment with limited bandwidth has become a key issue. [0003] As an emerging research hotspot, panoramic video transmission has been researched and explored at home and abroad. Guo Zongming from Peking University and others expounded the development status of panoramic v...

Claims

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Application Information

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IPC IPC(8): H04N21/442H04N21/218H04N21/81H04N21/845H04N21/858H04N13/194H04N13/366H04N13/332
CPCH04N21/21805H04N21/44209H04N21/44218H04N21/4424H04N21/816H04N21/8456H04N21/8586
Inventor 雒江涛杨福星杨军超徐正
Owner CHONGQING UNIV OF POSTS & TELECOMM
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