Distribution and Rendering of Real-Time Scene Based on the Virtual Reality System - Advances in Image and Graphics Technologies - page 193

information. With the support of geography, topography and building models in
the virtual reality platform, the realistic scenes are displayed more intuitively and
spatially.
The main contents of this essay is to display and render live streaming as the real-
time scene through the semi-automatic correction corresponding to the scene based on
ViWo[1]. The video streaming released on the corresponding location in the virtual
reality platform is sent to the streaming media server. Then the streaming is processed
to support multi-platforms and will be sent to the content distribution server. The
video streaming is projected on the ViWo client, enhancing the actual and real-time
social information and real scenes information. Meanwhile, the data caching and load
balancing of the distribution server is designed and implemented for providing a
steady stream of small delay.

2 Related Work

In this section we provide an overview of the relevant literature on the blending ren-
dering of virtual scene with real scene. And then we introduce the distribution me-
thods of the live streaming as the real scene and the replacement policy of the content
distribution server.

2.1 Combine Virtual Scene with Real Scene to Render

There are two main ways to combine virtual scenes and real scenes to render in the
virtual reality system. Augmented Reality (AR) [2] is a method of registering true 3D
virtual object into the world to display or output video through. Since a large amount
of positioning data analysis and computation is required to ensure that the scene in-
formation from the computer-generated virtual objects can be accurately positioned in
the real scene, this method is not suitable for real- time recording of real scene infor-
mation for the mobile device client. Another way is to increase the description of the
scene node in the virtual environment, including the text, images and video. Addition-
al information corresponding to the scene objects is a supplement for the virtual scene
rendering. Icon is added in the Google earth as entrance of real scene's display. Al-
though this approach based on the position of the virtual reality system is an effective
way to organize and display the real scene, it lacks the real-time information for the
video offline uploaded. The Real-time video streaming can effectively make up the
information presented in real time.

2.2 Distribution Methods of Live Streaming

The way of traditional live streaming transmission consists of IP multicast transmis-
sion[3], p2p (peer to peer) transmission [4] and end-to-end transmission. IP multicast
transmission is a method of sending IP datagrams to a group of interested receivers in
a single transmission, allowing nodes in the network to get data from the client which
has received data. This technology can reduce the pressure of the server and save the