Abstract
MPEG-2 video compression is the standard retained for video applications. Two encoding schemes are defined: open-loop and closed-loop. In this paper, some characteristics of the two MPEG encoding schemes are studied. We observe through the carried experiments that, with the same mean rate, open-loop encoding quality is better and less variable than closed-loop encoding quality. The ITU and ATM-Forum have defined ATM transfer capabilities in order to transport a wide variety of traffic classes. The impact of ATM contracts on the quality of a MPEG sequence is investigated. We show that the sequence quality is less damaged by reducing image size at the encoder level with ABT/DT contract than by a random cell loss inside the network with rt-VBR contract. Finally, we present a novel mechanism for real-time video transmission over ATM networks based on the elastic version of ABT/DT contract.
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Gara, S., Pujolle, G. (1998). Resource Allocations Protocols Impact on MPEG Sequence Quality. In: Hasegawa, T., Takagi, H., Takahashi, Y. (eds) Performance and Management of Complex Communication Networks. IFIP — The International Federation for Information Processing. Springer, Boston, MA. https://doi.org/10.1007/978-0-387-35360-9_18
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DOI: https://doi.org/10.1007/978-0-387-35360-9_18
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