Rate control in H.264 wireless video communication system

2010 ◽  
Vol 29 (2) ◽  
pp. 378-387
Author(s):  
Qiangyu Zeng ◽  
Xiaohai He ◽  
Rui Lv ◽  
Wei Wu
Keyword(s):  
Rate Control ◽  
Communication System ◽  
Video Communication ◽  
Wireless Video

Cross-Layer Techniques for Reliable Wireless Video Communication

2012 ◽  
pp. 432-459 ◽  
Author(s):  
Athar Ali Moinuddin ◽  
Mohd Ayyub Khan ◽  
Ekram Khan ◽  
Mohammed Ghanbari
Keyword(s):  
Communication System ◽  
Physical Layer ◽  
Video Communication ◽  
Scalable Video ◽  
Cross Layer ◽  
Main Theme ◽  
Application Layer ◽  
Wireless Video ◽  
Network Layers ◽  
Channel Errors

Designing wireless video communication system is a challenging task due to high error rates of wireless channels, limited and dynamically varying bandwidth availability, and low energy and complexity requirements of portable multimedia devices. Scalable video coders having excellent rate-distortion performance are most suited to cope with time varying bandwidth of wireless networks, but encoded bits are extremely sensitive to channel errors. This chapter presents a reliable video communication system exploring opportunities offered by various network layers for improved overall performance, while optimizing the resources. More specifically, cross-layer approach for Unequal Error Protection (UEP) of scalable video bitstream is the main theme of this chapter. In UEP, the important bits are given a higher protection compared to the other bits. Conventionally, UEP is achieved by using Forward Error Correction (FEC) at the application layer. However, UEP can also be provided at the physical layer using hierarchical modulation scheme. In this chapter, the authors discuss cross-layer design methodology for UEP that rely on interaction between the application layer and the physical layer to achieve reliable and high quality end-to-end performance in wireless environments. The discussion is mainly focused for wavelet coded video, but it is applicable to other embedded bitstreams as well.

Design of a High Definition Video Communication System in Real-Time Network

2013 ◽  
Vol 347-350 ◽  
pp. 2012-2017
Author(s):  
Yun Feng Liu ◽  
Xian Rong Peng ◽  
Zheng Jin
Keyword(s):  
Real Time ◽  
Rate Control ◽  
Communication System ◽  
Control Algorithm ◽  
Video Communication ◽  
High Definition ◽  
Time Performance ◽  
High Definition Video ◽  
Video Acquisition ◽  
Rate Control Algorithm

This paper presents the design of a high definition video communication system with real-time performance in the network. In order to process and transmit the high definition video, the design combines FPGA and SOC, follows the H.264 video coding compression. The FPGA realizes the highspeed video acquisition via Cameralink interface, and convert the raw image to ITU-R BT.1120 stream. The SOC contains CPU and Codec, it compresses the BT.1120 stream to H.264 steam and transmit the stream in the network. The low-delay rate control algorithm can limit the bitrate in a very low level. The result shows that the system reduces bandwidth and lowers the latency, the design is adaptable to the real time environments.

Wireless video communication system using PHS

1997 ◽  
Author(s):  
Tomoki Sakamaki ◽  
Hisashi Ibaraki ◽  
Tadashi Ichikawa ◽  
Ryota Suzuki
Keyword(s):  
Communication System ◽  
Video Communication ◽  
Wireless Video

Basic Design of Video Communication System Enabling Users to Move Around in Shared Space

2009 ◽  
Vol E92-C (11) ◽  
pp. 1387-1395 ◽  
Author(s):  
Keiji HIRATA ◽  
Yasunori HARADA ◽  
Toshihiro TAKADA ◽  
Naomi YAMASHITA ◽  
Shigemi AOYAGI ◽  
...  
Keyword(s):  
Communication System ◽  
Video Communication ◽  
Basic Design ◽  
Shared Space

A standalone video communication system for wireless applications

2002 ◽  
Author(s):  
Hon Cheong Ng ◽  
Hock Lye Toh ◽  
Susanto Rahardja ◽  
Hai Bin Huang ◽  
Xiang Chen ◽  
...  
Keyword(s):  
Communication System ◽  
Video Communication ◽  
Wireless Applications
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