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Performance of Digitally Compressed (MPEG) Picture Transmission via Real Transmission Systems
Vlatko Lipovac
Jasmin Mušović
Sažetak
MPEG is one of the most popular families of audio/video compression techniques, suitable for different applications but still based on similar principles. If an MPEG compressed video signal is to be transmitted to the remote user, various network technologies are available, such as eg. ATM and IP, where it is of interest to provide the needed quality of service (QoS) still using the most economical technology available. In order to accomplish that goal, it is necessary to monitor the QoS parameters of the relevant transmission technology (such as eg. delay variation and loss of protocol data units – frames, cells and packets), and then select appropriate methods for keeping the parameters values at the level that the vulnerable (due to reduction of the redundancy) compressed MPEG stream can tolerate. With this respect, in this paper, from one point of view, the example of test and measurement techniques as applied to the transmission system (ATM), and from another point of view, the achieved perceptual quality of the transmitted MPEG signal, have been considered, and the appropriate conclusions made about the degree of the impact of network packet loss on the quality of the received video signal.
Ključne riječi
MPEG; video; data compression/loss; quality-of-service (QoS); ATM
Hrčak ID:
13163
URI
Datum izdavanja:
19.6.2007.
Posjeta: 4.009 *