Communication Performance Research for Online Video over Wireless Multimedia Network

2013 ◽  
Vol 760-762 ◽  
pp. 643-646
Author(s):  
Yue Bin Wang ◽  
Li Qiang Liu ◽  
Quan Feng Yan
Keyword(s):  
Wireless Network ◽  
Video Transmission ◽  
Limited Resources ◽  
Online Video ◽  
Wireless Multimedia ◽  
Communication Performance ◽  
Loss Probabilities ◽  
Transmission Quality ◽  
Performance Research

This paper analyzed the communication performance to implement video coding and transmission in the limited resources of wireless network. Meanwhile, the effect of GOP, quantification and loss probabilities to transmission quality in multimedia communication is discussed, and the correlation between those relevant parameters and transmission quality of multimedia video is analyzed by simulation. The simulation results show that the transmission quality of multimedia video in wireless network varies with the compression parameters, network parameters, and network conditions. Thus, video transmission over wireless network, it should consider the network conditions, as well as appropriate length of the GOP and quantification parameters for better reconstructed images.

Video Quality Evaluation for H.264 Video Streaming over Wireless Networks

2013 ◽  
Vol 760-762 ◽  
pp. 639-642
Author(s):  
Li Qiang Liu ◽  
Yue Bing Wang ◽  
Quan Feng Yan
Keyword(s):  
Wireless Networks ◽  
Wireless Network ◽  
Video Transmission ◽  
Rapid Development ◽  
Video Quality ◽  
Video Encoding ◽  
Network Bandwidth ◽  
Transmission Quality ◽  
Routing Technology

With the rapid development of computer technology and wireless network communication technology, video encoding technology will be more and more widely applied in the limited resources of the wireless network. Due to the large amount of data of the video transmission , transmission quality of transmit video on the wireless network are varied with different compression parameters, network parameters and network conditions. Simulation results show that the transmission of video over wireless networks, must be based on the current network conditions, choosing the suitable GOP length and quantitative parameters to get the high image quality. In specific applications, network topology, network bandwidth, routing technology and transmission of packet segmentation scheme and other factors will affect the quality of service for video services.

scholarly journals Improving the Quality of Video Transmission in a Wireless Network by Using a Hybrid Packet Loss Correction Algorithm

2018 ◽  
Vol 16 (3) ◽  
pp. 78
Author(s):  
M M Emelianova ◽  
V N Emelianov ◽  
A V Abilov
Keyword(s):  
Wireless Network ◽  
Packet Loss ◽  
Video Transmission ◽  
Correction Algorithm

Существуют различные способы передачи видеоданных режима реального времени. Один из наиболее успешных и экономически эффективных вариантов - это одноранговые сети, реализуемые программно в приложениях. Но у данного решения есть и недостатки, заключающиеся в возможном ухудшении качества передачи из-за отключения узлов-передатчиков, плохих каналов связи и ошибок в работе отдельных устройств. Чтобы видеопоток доставлялся до получателей без ошибок и потерь, применяются различные механизмы повышения помехоустойчивости, такие как избыточное кодирование (FEC), повторная передача (ARQ) и кодирование с множественным описанием (MDC), у каждого из которых есть свои недостатки. В статье приводится описание разработанного гибридного алгоритма коррекции потерь пакетов. Подробно описывается его реализация в приложении для серверного и клиентского устройств. Для оценки эффективности разработанного гибридного алгоритма проведен ряд экспериментов. Полученные при различных начальных условиях результаты значений коэффициента потерь пакетов гибридного алгоритма коррекции потерь сравниваются с результатами для алгоритма ARQ при аналогичных условиях.

scholarly journals QoS Aware Video Transmission in Wireless Network: Successful and Failure Existing Technique

2020 ◽  
Vol 8 (5) ◽  
pp. 516-523
Keyword(s):  
Quality Of Service ◽  
Wireless Network ◽  
Routing Protocols ◽  
Video Transmission ◽  
Daily Life ◽  
Research Work ◽  
Effective Bandwidth ◽  
Face To Face ◽  
Novel Approach

Wireless technology has become one of the integral part of our daily life, it is the 21st century technology, emergency of wireless network have led the multimedia distribution very effectively. Moreover the video has been an eminent media for communications as well as for the entertainment purpose for past several decades. Due to improvisation in technologies people can communicate over face to face over the wireless network without any concern about the distance, hence the video transmission over the wireless network has become one of the interesting application in daily life. Moreover, it is very important to maintain good QoS (Quality of Service) such as effective bandwidth, routing protocols and other QoS parameters. In this paper, we have surveyed the extensive amount of research paper to understand the Quality of service, meanwhile we have extensively discussed the various existing methodology, which has helped in improvising the wireless network for video transmission. Moreover the main aim of this research work is to survey and address all the requirement along with challenges that occurs while designing the wireless network, also this survey unveils the recent development in optimization, algorithm, novel approach and the protocols for improvising the Quality of Service

A Novel Video Stream Transmission Control Algorithm

2012 ◽  
Vol 268-270 ◽  
pp. 1814-1817
Author(s):  
Ming Wei Wang ◽  
Jian Zhong Lin ◽  
Xin Xie ◽  
Qi Wang
Keyword(s):  
Queue Length ◽  
Control Algorithm ◽  
Video Transmission ◽  
Video Stream ◽  
Video Frame ◽  
Transmission Control ◽  
Transmission Quality ◽  
Simulation Results ◽  
Video Transmission Quality

Video stream codec and transmission control algorithm is very important to improve quality of service of video on Internet. A priority video transmission algorithm based on queue-length(VTA-QL) is proposed. Different kind of video frame is marked with different priority and is scheduled according to its priority. Simulation results show that the proposed algorithm VTA-QL can improve the video transmission quality greatly, and that link bandwidth, delay and queue length have much effect on video transmission quality.

A Cross-Layer Design for Video Streaming Over 802.11e HCCA Wireless Network

2013 ◽  
pp. 261-273
Author(s):  
Hongli Luo
Keyword(s):  
Wireless Network ◽  
Video Streaming ◽  
Wireless Lan ◽  
Video Transmission ◽  
Video Codec ◽  
Ieee 802.11E ◽  
Cross Layer ◽  
Cross Layer Design ◽  
Queuing Delay

Video transmission over wireless networks has quality of service (QoS) requirements and the time-varying characteristics of wireless channels make it a challenging task. IEEE 802.11 Wireless LAN has been widely used for the last mile connection for multimedia transmission. In this paper, a cross-layer design is presented for video streaming over IEEE 802.11e HCF Controlled Channel Access (HCCA) WLAN. The goal of the cross-layer design is to improve the quality of the video received in a wireless network under the constraint of network bandwidth. The approach is composed of two algorithms. First, an allocation of optimal TXOP is calculated which aims at maintaining a short queuing delay at the wireless station at the cost of a small TXOP allocation. Second, the transmission of the packets is scheduled according to the importance of the packets in order to maximize the visual quality of video. The approach is compared with the standard HCCA on NS2 simulation tools using H.264 video codec. The proposed cross-layer design outperforms the standard approach in terms of the PSNRs of the received video. This approach reduces the packet loss to allow the graceful video degradation, especially under heavy network traffic.

A Framework for Evaluation of Video Quality of Service in Wireless Networks

2017 ◽  
pp. 1-29
Author(s):  
Dharm Singh ◽  
Lal Chand Bishnoi
Keyword(s):  
Wireless Networks ◽  
Quality Of Service ◽  
Video Transmission ◽  
Video Quality ◽  
Measuring Technique ◽  
New Techniques ◽  
Ieee 802.11N ◽  
Transmission Quality ◽  
Video Transmission Quality

Today's IEEE 802.11n WLAN are capable of delivering the essential bandwidth for video by using MPEG-4 or H.264 codec compression. However, 802.11n devices are popular for delivering wireless video transmission. Even though there are some challenges for these devices specifically severe network congestion that degrade the quality of video transmission. For assessing the video transmission quality during a simulation on 802.11n WLAN technology, we extended a framework and toolset (802.11nMyEvalVid) which can be used to measures the QoS constraints in wireless networks, such as throughput, delays, and end-to-end delay. However, it also supports PSNR, which is a received video quality measuring technique based on a comparison of frame-by-frame. This chapter focused on a framework 802.11nMyEvalVid that can be used for research and evaluating new techniques for MAC-layer optimizations for simulating MPEG-4, H.264/AVC and H.264/SVC video over 802.11n WLAN in a more efficient and reliable way.

Study on Adaptive QoS Solution of Real-Time Video Stream in Wireless Network

2012 ◽  
Vol 532-533 ◽  
pp. 1124-1129
Author(s):  
Xiao Yun Xiong ◽  
Bing Wang ◽  
De Xing Wang
Keyword(s):  
Wireless Networks ◽  
Real Time ◽  
Wireless Network ◽  
Video Transmission ◽  
Rapid Development ◽  
Video Stream ◽  
Link State ◽  
Multiple Qos ◽  
Adaptive Qos

With the rapid development of wireless network technology, wireless networks have been widely used in many fields due to the flexibility of wireless access. However, in the field of video transmission, because the link state is instability and the transmission is easily interfered in wireless networks, the quality of video transmission is affected badly. In fading and shadowing channels, some users can’t watch the video normally. This paper provides an adaptive QoS solution of real-time video stream in wireless network, by adding a relay server it can provide multicast or unicast video stream satisfying multiple QoS for users with different network state. This solution has been successfully applied in Qingdao Public safety emergency video surveillance system.

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