Real-time video for distributed control systems

Clavijo, Jose A.; Segarra, Miguel; Baeza, C.; Moreno, Christophe; Sanz, Ricardo; Jiménez, Agustín; Vázquez, Rafael García; Díaz, Francisco Javier; Dı́ez, A.

doi:10.1016/s0967-0661(00)00124-6

Cited by 9 publications

(1 citation statement)

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“…Clavijo et al proposed that a CORBA middleware implementation can be used to offer real-time video streaming [5]. Furthermore, in [6], Kaff et al introduced a CORBA based platform to respond to changing resource requirements in video applications using video streaming service.…”

Section: Literature Reviewmentioning

confidence: 99%

Real-Time QoS-Aware Video Streaming: A Comparative and Experimental Study

Almadani

Al-Roubaiey

Baig

2014

Advances in Multimedia

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Due to its flexibility, scalability, real-time, and rich QoS features, Data Distribution Service (DDS) middleware provides seamless integration with high-performance, real-time, and mission-critical networks. Unlike traditional client-server communication models, DDS is based on the publish/subscribe communication model. DDS improves video streaming quality through its efficient and high-performance data delivery mechanism. This paper studies and investigates how DDS is suitable for streaming real-time full-motion video over a communication network. Experimental studies are conducted to compare video streaming using a the VLC player with the DDS overlay. Our results depict the superiority of DDS in provisioning quality video streams at the cost of low network bandwidth. The results also show that DDS is more scalable and flexible and is a promised technology for video distribution over IP networks where it uses much less bandwidth while maintaining high quality video stream delivery.

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Section: Literature Reviewmentioning

confidence: 99%

Real-Time QoS-Aware Video Streaming: A Comparative and Experimental Study

Almadani

Al-Roubaiey

Baig

2014

Advances in Multimedia

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QoS-aware scalable video streaming using data distribution service

Almadani

Al-Saeedi

Al-Roubaiey

2015

Multimed Tools Appl

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Enabling Real-Time video streaming over wireless networks is a challenging task due to the time-varying channel conditions and the limited network resources. The instability of wireless networks leads to problems such as limited and time-varying bandwidth, and unexpected traffic congestion when transmitting a burst of video streams. In Real-Time video streaming, each frame must be delivered and decoded by its playback time. Recently, layer coding (LC) has enabled Real-Time and scalable video streaming to clients of heterogeneous capabilities by dropping upper enhancement layers without the need of re-encoding and with much less bit rate. However, layer coding still facing unfair layer protection problem in which packets from the base or lower layers might be dropped while there is a chance to drop packets from the upper enhancement layers. Losing packets from the base layer can significantly affect the delivered video quality and sometimes lead to an interruption especially in error-prone networks as wireless networks. Architectural solutions at the middleware level introduce higher flexibility, more efficiency in development time and more QoS control. This work investigates the behavior of video streaming over Real-Time publish-subscribe based middleware. We propose and develop an unequal layer protection mechanism for Real-Time video streaming based on the Data Distribution Service (DDS) middleware. A combination of video quality of service (QoS) is proposed to adapt the video transmission to the time-varying network changes. The performance of Real-Time video streaming is measured over IEEE 802.11 g WLAN network. The results show a graceful degradation of video quality while maintaining a robust video streaming free of visible error or interruptions. This is due to the intentionally dropping of some enhancement video stream layers in order to protect lower layers, and therefore maintain a continuous video flow of acceptable quality. Numerical results indicate that the proposed scheme is able to achieve higher throughput and improve the average received video quality especially in a large number of video subscribers.

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