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Emerging as the method of choice for compressing video over WLANs, the AVC/H.264 standard is a suite of coding options and parameters whose values are to be chosen for specific videos and channel conditions. We investigate the tradeoffs in performance across the quantization parameter (QP), the group of picture size (GOPS), the payload size (PS), physical layer (PHY) data rate in 802.11a, and the...
Average packet loss rate (PLR) or average mean opinion score (MOS) are often used performance indicators for voice communications. However, even for a fixed average PLR, the delivered voice quality depends on the location of the packet losses as well as the distribution of packet losses due to the differences in voice codecs, their packet loss concealment schemes, the difficulty of concealing packet...
Wireless local area networks offer a range of transmitted data rates that are to be selected according to estimated channel conditions. However, due to packet overheads and contention times introduced by the CSMA/CA multiple access protocol, effective throughput is much less than the nominal data rates. Most multimedia applications use small payload sizes in order to ensure reliable, low latency transmission...
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