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152 results on '"Du, David H.C."'

11. A network-aware approach for video and metadata streaming

Author

Raghuveer, Aravindan, Kusmierek, Ewa, and Du, David. H.C.

Subjects
Algorithms -- Usage, Algorithm, Business, Computers, Electronics, Electronics and electrical industries
Abstract

Providing quality of service (QoS) for Internet-based video streaming applications requires the server and/or client to be network-aware and adaptive. We present a dynamic rate and quality adaptation algorithm where the server varies its sending rate (without varying the quality level) to adapt to the network and client conditions and only as a last resort, does quality adaptation. We place the adaptation logic at the client since it has better knowledge about both the demand (buffer conditions, variable bit-rate requirements) and supply (network conditions). Our approach is unique because the server's sending rate is calculated based on the client's varying demand (consumption rate) and the network status. Also, we do not model the network as a black-box but instead augment endpoint observations with a feedback from the network to represent its status more precisely. To make an informed adaptation decision, the client requires sizes of all frames in the variable bit rate video. But the overhead involved in sending this metadata is significant. So we propose a lossy compression technique to reduce the amount of control information and consequently the overhead. We also present a scheduling algorithm, Dynamic Scheduling Algorithm for Reduced Trace delivery (DART), to deliver the compressed control information to the client. This algorithm can be used to deliver any form of metadata (like subtitles, alerts, etc.), especially in applications like IP-TV. Simulations show that the proposed techniques can significantly improve user perceived QoS when compared to other popular adaptation methods. Index Terms--IP-TV, metadata delivery, rate adaptation, QoS, trace compression, underflow curve.

Published
2007

28. On wafer-packing problems

Author

Du, David H.C., Ichiang Lin, and Chang, K.C.

Subjects
Heuristic Methods, Multichip Module, Scientific Research, Algorithm, Heuristic programming, Semiconductor wafers -- Research, Heuristic programming -- Usage
Published
1993

32. ZoneTier

Author

Xie, Xuchao, primary, Xiao, Liquan, additional, and Du, David H.C., additional

Published
2019
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34. Building future medical education environments over ATM networks

Author

Schnepf, James A., Du, David H.C., Ritenour, E. Russell, and Fahrmann, Aaron J.

Subjects
ATM, Multimedia technology, Telecommunication systems -- Usage, Radiology -- Study and teaching -- Usage, Asynchronous communications -- Usage -- Study and teaching, Distance education -- Study and teaching -- Usage, Multimedia technology -- Usage -- Study and teaching, Radiologists -- Training -- Usage -- Study and teaching, Radiology, Medical -- Study and teaching -- Usage
Abstract

The educational requirements of our society are changing. It is no longer sufficient to obtain an education at a single point in time and be done; rather, education must be […]

Published
1995

43. Performance study of iSCSI-based storage subsystems

Author

Lu, Yingping and Du, David H.C.

Subjects
SCSI, TCP/IP, Transmission speed, Data transfer rate, Protocol, Small Computer Systems Interface -- Evaluation, Transmission Control Protocol/Internet Protocol (Computer network protocol) -- Evaluation, Transmission speed -- Evaluation, Data transfer rate -- Evaluation, Computer network protocols -- Evaluation
Published
2003

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