Adventures in building the Stony Brook video server
MULTIMEDIA '96 Proceedings of the fourth ACM international conference on Multimedia
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Digital video traffic is inherently bursty for two reasons: inherent motion of objects and cameras, and the artifacts of compression algorithms. Because digital video playback requires bandwidth guarantees from the underlying I/O and network systems, the bursty nature of video traffic forces the bandwidth reservations to be made at the level of peak data rates rather than average data rates. This work addresses the burstiness problem in digital video traffic by proposing changes to the MPEG compression/decompression algorithm. The resulting algorithm, block-by-block (BBB) difference coding, successfully minimizes the difference between peak and average bit rates by a factor of 2 to 3 in average, without compromising the compression efficiency, coding speed and video quality.