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When service providers (SPs) provide delay-sensitive service over packet-switched networks, it is essential to manage the high percentile of packet transfer delay. We focus on the monitoring of the high percentile of delay based on baseline performance, which SPs consider as a normal state from results of performance measurements. First, we state two requirements of the criteria from the view point...
Quality of service requirements for IP networks are becoming higher. Accordingly, managing, measuring, and monitoring IP networks are also becoming more important. In particular, for real-time communication, the quality of packet transmission (packet loss, delay, and delay variation) needs to be carefully maintained. In managing these performance parameters, active measurements have been often used,...
A digital video cassette recorder (DVCR) for home use has been developed, adopting a high-efficiency picture coding method. A constant data volume per frame or field is maintained, relying on rate-adaptive discrete cosine transform (DCT) coding using coding bit allocation according to the image activity. A modulator with a new coding technique and error correction module enables high-density recording...
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