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Proceedings Paper

Storage, retrieval, and edit of digital video using Motion JPEG
Author(s): Subramania I. Sudharsanan; D. H. Lee
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Paper Abstract

In a companion paper we describe a Micro Channel adapter card that can perform real-time JPEG (Joint Photographic Experts Group) compression of a 640 by 480 24-bit image within 1/30th of a second. Since this corresponds to NTSC video rates at considerably good perceptual quality, this system can be used for real-time capture and manipulation of continuously fed video. To facilitate capturing the compressed video in a storage medium, an IBM Bus master SCSI adapter with cache is utilized. Efficacy of the data transfer mechanism is considerably improved using the System Control Block architecture, an extension to Micro Channel bus masters. We show experimental results that the overall system can perform at compressed data rates of about 1.5 MBytes/second sustained and with sporadic peaks to about 1.8 MBytes/second depending on the image sequence content. We also describe mechanisms to access the compressed data very efficiently through special file formats. This in turn permits creation of simpler sequence editors. Another advantage of the special file format is easy control of forward, backward and slow motion playback. The proposed method can be extended for design of a video compression subsystem for a variety of personal computing systems.

Paper Details

Date Published: 1 April 1994
PDF: 12 pages
Proc. SPIE 2188, High-Speed Networking and Multimedia Computing, (1 April 1994); doi: 10.1117/12.171711
Show Author Affiliations
Subramania I. Sudharsanan, Digital Equipment Corp. (United States)
D. H. Lee, IBM Corp. (United States)

Published in SPIE Proceedings Vol. 2188:
High-Speed Networking and Multimedia Computing
Arturo A. Rodriguez; Mon-Song Chen; Jacek Maitan, Editor(s)

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