Data Compression Project
Abstract
The technical objective of this project has been to develop algorithms for compressing digital data that are compatible with the new generation of smart missiles and that can expand the normal operational role of such weapons to include a means for battle damage indication (BDI). A real time BDI system would be an integral and effective tool for adaptive mission planning and retargeting during a strike and for vital imagery required for subsequent rapid retargeting and mission planning. This project has developed the means for compressing video digital data by a large factor from an almost lossless compression ratio of 20:1 to a highly lossy ratio of 200:1. The compression task also includes compatible coding techniques that convert the compressed video images into an embedded bit stream for datalink transmission. An embedded bit stream is an ordered set of bits representing the compressed image as illustrated by Figure 1-1 (i.e., the bit stream is organized so that the most important bits can be transmitted first). Such embedded coders have many advantages for EDI applications, including their ability to generate fixed rate bit streams without buffering and their suitability for error prone communications channels. In order to ensure that the reconstructed BDI images meet the accuracy required by a human or computer interpreter, the encoder has been optimized to achieve the lowest bit rates for a wide range of operating conditions. The compression algorithm has also been designed to operate within the context of a proposed operational system, which must be a low cost, missileborne electrooptical (EO) camera or an infrared (IR) imaging array transmitting to a ground station via a datalink. The algorithm and its realization in signal processing hardware has been matched to expected datalink bandwidths and transmission speeds in the ear 2000.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1999
- Accession Number
- ADA370497
Entities
People
- Charles D. Creusere
- Jim Witham
Organizations
- Naval Air Warfare Center Weapons Division