Storage, retrieval, and edit of digital video using Motion JPEG

Subramania I. Sudharsanan; D. H. Lee

doi:10.1117/12.171711

1 April 1994 Storage, retrieval, and edit of digital video using Motion JPEG

Subramania I. Sudharsanan, D. H. Lee

Proceedings Volume 2188, High-Speed Networking and Multimedia Computing; (1994) https://doi.org/10.1117/12.171711
Event: IS&T/SPIE 1994 International Symposium on Electronic Imaging: Science and Technology, 1994, San Jose, CA, United States

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.

Citation Download Citation

Subramania I. Sudharsanan and D. H. Lee "Storage, retrieval, and edit of digital video using Motion JPEG", Proc. SPIE 2188, High-Speed Networking and Multimedia Computing, (1 April 1994); https://doi.org/10.1117/12.171711

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