As one of the most challenging aspects of streaming video over lossy networks, the technology for controlling packet losses has attracted more and more attention. Erasure coding is one of the ideal choices to deal with this problem. In most cases, the researchers need an effective method or tool to validate the erasure codes used for dealing with different packet loss patterns. Although some previous work has been done on employing erasure codes in video streaming system, few actual buildups and experiments which involve implementation of erasure codes against real packet loss in streaming systems have been reported. In this paper, we focus on constructing a testbed that integrates loss pattern generation and erasure coding implementation into video streaming services over lossy networks. With this approach, we are able to assess the capability of erasure coding in packet loss control and compare the performances of the video streaming systems with and without erasure coding. As an example, we have implemented the Reed-Solomon (7, 5) code for protecting MPEG streaming data under random packet losses. Experiment results show that the replay quality can be improved significantly by using erasure coding in video streaming systems, and that the testbed can suggest appropriate erasure code parameters for different loss environments.
|Title of host publication||ISCIT 2007 - 2007 International Symposium on Communications and Information Technologies Proceedings|
|Number of pages||6|
|Publication status||Published - 4 Dec 2007|
|Event||ISCIT 2007 - 2007 International Symposium on Communications and Information Technologies - Sydney, United Kingdom|
Duration: 16 Oct 2007 → 19 Oct 2007
|Conference||ISCIT 2007 - 2007 International Symposium on Communications and Information Technologies|
|Period||16/10/07 → 19/10/07|