A comparison of bandwidth smoothing techniques for the transmission of prerecorded compressed video

The transfer of prerecorded, compressed video requires multimedia services to support large fluctuations in bandwidth requirements on multiple time scales. Bandwidth smoothing techniques can reduce the burstiness of a variable-bit-rate stream by prefetching data at a series of fixed rates, simplifyi...

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Main Authors: Wu-Chi Feng, Mishra, P.P., Ramakishnan, K.K.
Format: Conference Proceeding
Language:English
Subjects:
Bandwidth
Communication networks
Fluctuations
Network servers
Prefetching
Resource management
Smoothing methods
Streaming media
Testing
Video compression
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creator Wu-Chi Feng
Mishra, P.P.
Ramakishnan, K.K.
description The transfer of prerecorded, compressed video requires multimedia services to support large fluctuations in bandwidth requirements on multiple time scales. Bandwidth smoothing techniques can reduce the burstiness of a variable-bit-rate stream by prefetching data at a series of fixed rates, simplifying the allocation of resources in video servers and the communication network. Given a fixed client-side prefetch buffer several bandwidth smoothing algorithms have been introduced that are provably optimal under certain constraints. This paper presents a collection of metrics for comparing these smoothing algorithms and evaluating their cost-performance trade-offs. Due to the scarcity of available trace data, we have constructed a video capture testbed and generated a collection of twenty full-length, motion-JPEG encoded video clips. Using these video traces and a range of client buffer sizes, we investigate the interplay between the performance metrics through simulation experiments. The results highlight the unique strengths and weaknesses of each algorithm.
doi_str_mv 10.1109/INFCOM.1997.635114
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source IEEE Electronic Library (IEL) Conference Proceedings
subjects Bandwidth
Communication networks
Fluctuations
Network servers
Prefetching
Resource management
Smoothing methods
Streaming media
Testing
Video compression
title A comparison of bandwidth smoothing techniques for the transmission of prerecorded compressed video
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