Summary of Activities Report for 1 Jun 1993 through 31 May 1994 for University of California Contract N00014-93-1-0871
Abstract
During the past year, we continued our efforts in the areas of video compression and storage 1, 2. We have developed three strategies for placement of Constant Bit Rate (CBR) video data on parallel disk arrays. Using a low-level disk model and video data from a scalable subband coding technique, we have derived constraints with which to compare the three strategies. In doing so, we have found one of the strategies, constant frame grouping, to be superior to the other two. In addition, two methods for interleaving multiple videos under the constant frame grouping strategy have been developed: nonperiodic and periodic. Periodic interleaving is shown to have the advantages of a lower access time and limited scan and pause functions. The constant frame grouping strategy was tested on an actual array of 8 disks and shown to have performance that is close to the theoretical prediction. The scalable nature of the compressed data was used to relieve the disk system overload for an overly high request rate. Details of this work was presented at the SPIE Symposium on Electronic Imaging in San Jose last February 1.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 31, 1994
- Accession Number
- ADA283890
Entities
People
- Avideh Zakhor
Organizations
- University of California, Berkeley