Title :
Impact of ATM traffic control on MPEG-2 video quality
Author :
Gu, Jiayi ; Jurczyk, Michael ; Chen, Chang Wen
Author_Institution :
Missouri Univ., Columbia, MO, USA
Abstract :
In this paper, a performance study of controlled MPEG-2 video traffic over an ATM network is presented. ATM networks are able to support variable bit rate (VBR) video sources. However, to implement QoS contract enforcement, traffic policers such as a Leaky Bucket (LB) need to be incorporated in order to change the VBR characteristics of a video stream. Our study investigates the video quality achievable by different traffic policing mechanisms. We use cell loss, frame corruption, and mean square error (MSE) to evaluate the influence of different traffic policers on the quality of the transmitted video stream. The performance evaluation is accomplished by simulating an ATM network using real MPEG-2 video streams. In our study, we also consider the layered video coding offered by the MPEG-2 standard. With traffic control, layered video achieves significant quality improvement for video transmission over ATM as compared to the one-layer case
Keywords :
asynchronous transfer mode; broadband networks; code standards; data compression; mean square error methods; quality of service; telecommunication control; telecommunication traffic; video coding; ATM traffic control; MPEG-2 video quality; MSE; QoS contract enforcement; VBR characteristics; VBR video sources; cell loss; frame corruption; layered video coding; leaky bucket scheme; mean square error; performance evaluation; priority switch; traffic policing mechanisms; transmitted video stream; variable bit rate video sources; Asynchronous transfer mode; Bit rate; Communication system traffic control; Contracts; Degradation; Loss measurement; Streaming media; Switches; Telecommunication traffic; Traffic control;
Conference_Titel :
Circuits and Systems, 1999. ISCAS '99. Proceedings of the 1999 IEEE International Symposium on
Conference_Location :
Orlando, FL
Print_ISBN :
0-7803-5471-0
DOI :
10.1109/ISCAS.1999.780047
