Video bandwidth compression
Abstract
This project report summarizes the bandwidth compression research activities performed by the University of Kansas under contract number F33-615-74-R-1093 with the Air Force Avionics Laboratory at Wright Patterson Air Force Base, Ohio. The primary purpose of this study is to investigate the feasibility of video bandwidth compression in the order of 50:1. This compression was simulated using imagery digitized to 64 grey levels (6 bits). This task was accomplished by three steps. These steps are: transform compression, frame rate reduction, and Differential Pulse Code Modulation (DPCM). Since the transform compression scheme is vital to the success of this project, major emphasis was placed on this area. Results indicate that a 50:1 compression is feasible and that the best transforms to be utilized in a hybrid manner with DPCM is the Discrete Cosine. Additional research developments led to a fast implementation of the Karhunen Loeve transform which is optimum under root mean square error criteria. Comparisons of other fast transform performance is made as well as an optimum bit coding scheme.
- Publication:
-
Final Report
- Pub Date:
- February 1977
- Bibcode:
- 1977kul..rept.....G
- Keywords:
-
- Bandwidth;
- Data Transmission;
- Imagery;
- Pulse Compression;
- Remotely Piloted Vehicles;
- Video Data;
- Data Links;
- Karhunen-Loeve Expansion;
- Pulse Code Modulation;
- Root-Mean-Square Errors;
- Communications and Radar