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Overlay multicast is an effective approach to the problem of streaming distribution. Other approaches proposed for streaming, i.e., unicast transmission and IP multicast have several drawbacks. The former method is not scalable with the growing number of users. The latter method - IP multicast - requires strong cooperation with ISPs (Internet Service Providers) what is not always realizable due to...
Transmission of voice over packet-based protocol has recently gained momentum. To this effect, Voice over Internet Protocol (VoIP) implementations on current and future versions of the Internet Protocols networks is becoming a convenient and inexpensive technology. This is the technology that is replacing traditional public switched telephone networks (PSTN). However, like any other such technology,...
Most network operators have considered reducing Label Switched Routers (LSR) label spaces (i.e. the number of labels that can be used) as a means of simplifying management of underlaying Virtual Private Networks (VPNs) and, hence, reducing operational expenditure (OPEX). This letter discusses the problem of reducing the label spaces in Multiprotocol Label Switched (MPLS) networks using label merging...
This work investigates the effects of packet loss on perceived audio quality using an acceptability test, seeking to identify the maximum amount of packet loss that can be tolerated before the quality becomes unacceptable. An acceptability test is faster and easier for the subjects than traditional tests such as ITU-R BS.1116 or MUSHRA. It is seen that the acceptability decreases quickly as the packet...
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