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ISBN 978-952-5726-09-1 (Print)
Proceedings of the Second International Symposium on Networking and Network Security (ISNNS ’10)
Jinggangshan, P. R. China, 2-4, April. 2010, pp. 019-022
An Application Research on Video Coding H.264
Standard and Video Conference System
Zhan Guo 1 , Zuming Xiao 1 , Feng Luo 1 , and Bin Tan 2
1
Dept. of Physics, Jingdezhen Comprehensive College,Jingdezhen Jiangxi ,China
e-mail: teachergz@163.com
2 School of Information Science and Communication, Jinggangshan University,Ji-An Jiangxi ,China
e-mail: jatanbin@163.com
Abstract—This paper introduces an application research on
video coding H.264 standard and video conference system ,
given the basic structure of the system design, and video
processing module of the system has been optimized, tested
and compared to verify the system has the good real-time
and stability.
Index Terms—video compression standard, H.264, video
conferencing systems, video encoding and decoding
technology, network architecture, video, images, multimedia
communications
Manager module, Shown in Figure 1.
Video processing
module
QOS
Audio Processing
Module
Network
TCP / IP
Transmi
ssion
Module
Members
End
Chairman
terminal
I. INTRODUCTION
With the development of information technology and
the popularity of network, the need for supplying high
quality video/audio multimedia services grows rapidly.
Videoconference is a multimedia communication tech that
can achieve the real-time 、 visual and interactive
communication with people who are in deferent places.
Apply of Videoconference tech can save customer’s time
and improve the work efficiency etc[1]. Videoconference
tech has a wide applicable scope, and it has a good
prospect. H.264 applies many mostly used technologies
with the advantage of former video compresssion standard.
It provides fairly good video quality while achieving
better coding efficiency and more simple syntax
expression, and it’s the most efficient video compression
standard at present.This article introduces an application
research on video coding H.264 standard and video
conference system.Relativing hardware video
conferencing system,it invests few on the hardware
equipment, maintains the quantity to be small, thus
becomes low cost high product plan.the System to
network adaptiveness very well,the system may penetrate
the firewall, attends the conference the flexibility to be
very well, the system’s mobility is strong as well. To
enhance the real-time nature of video conferencing system
to use the H.264 standard for video processing module
optimization.video conferencing systems and providing
basic structural design, as well as a brief description of
system modules.
II.
SUMMARY OF SYSTEM
The video conferencing system has five main
functional modules[2]: Video processing module、Audio
Processing Module 、 Network TCP/IP Transmission
Module 、 Network Quality Control Module 、 Meeting
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Meeting Manager
module
Members
End
Figure 1. Software Video Conference System diagram
A. Video Processing Module
Video processing modules include video data collection,
encoding, decoding and playback. Playback of video data
collection and use of standards in line with Microsoft's
software development kit VFW (Video For Windows),
mainly by calling AVICap32.dll created AVICAP
window class, window class by AVICAP in the news,
macro functions, structure and the callback function to
achieved. For the H.264 video codec, which has more than
one bright spot in technology, such as the unified symbol
VLC coding, high-precision, multi-mode displacement
estimates, based on 4x4 Integer Transform block, intra
prediction, deblocking filter, support for SI and SP frames,
multi-frame reference, layered coding syntax and so on,
these measures have made H. 264 algorithm has a high
coding efficiency, in the same reconstructed image quality
of the next. Than H.263 bit-rate savings of about 50%;
and the H.264 bit stream structure of the network
adaptability, increased error resilience can be well adapted
to IP and wireless networking applications; application
target range is wider, meet the different rates, different
resolutions and different transmission (storage) occasion
demands. The basic system is open, use without copyright,
which will reduce the system cost. However, the
computational complexity is too high, the complexity of
the encoder for the H.263 ten times, its H.263 decoder
complexity is 3 times. H.264 codec to reduce the
complexity of this system has become the key to whether
the real-time operation[4].
To this end, pairs of H.264 can be considered in the
following aspects of the corresponding optimization [6]:
The most common approach is to optimize the