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ICASSP
2008
IEEE
15 years 4 months ago
Perceptually weighted distortion measures and the tandem connection of speech codecs
Tandem connections of voice codecs can occur today in mobileto-mobile calls and for certain VoIP connections. While postfiltering in tandem encodings is well-understood, the effe...
Niranjan Shetty, Jerry D. Gibson
ICC
2007
IEEE
143views Communications» more  ICC 2007»
15 years 4 months ago
A Stochastic Framework for Scheduling in Wireless Packet Access Networks
— We put forth a unified framework for downlink and uplink scheduling of multiple connections with diverse qualityof-service requirements, where each connection transmits using ...
Xin Wang, Georgios B. Giannakis
ICIP
2007
IEEE
15 years 4 months ago
Graph-Cut Rate Distortion Algorithm for Contourlet-Based Image Compression
The geometric features of images, such as edges, are difficult to represent. When a redundant transform is used for their extraction, the compression challenge is even more dif...
Maria Trocan, Béatrice Pesquet-Popescu, Jam...
INFOCOM
2007
IEEE
15 years 4 months ago
Fundamental Complexity of Optical Systems
Abstract—It is often claimed that future systems will necessarily be all-optical, because electronic devices are not fast enough to keep up with the increase in fiber capacity. ...
Hadas Kogan, Isaac Keslassy
AIED
2007
Springer
15 years 4 months ago
Beyond the code-and-count analysis of tutoring dialogues
In this paper, we raise a methodological issue concerning the empirical analysis of tutoring dialogues: The frequencies of tutoring moves do not necessarily reveal their causal ef...
Stellan Ohlsson, Barbara Di Eugenio, Bettina Chow,...