The design of a digital voice data compression technique for orbiter voice channels
Abstract
Voice bandwidth compression techniques were investigated to anticipate link margin difficulties in the shuttle S-band communication system. It was felt that by reducing the data rate on each voice channel from the baseline 24 (or 32) Kbps to 8 Kbps, additional margin could be obtained. The feasibility of such an alternate voice transmission system was studied. Several factors of prime importance that were addressed are: (1) achieving high quality voice at 8 Kbps; (2) performance in the presence of the anticipated shuttle cabin environmental noise; (3) performance in the presence of the anticipated channel error statistics; and (4) minimal increase in size, weight, and power over the current baseline voice processor.
- Publication:
-
Final Report TRW Systems Group
- Pub Date:
- August 1975
- Bibcode:
- 1975trw..reptQ.....
- Keywords:
-
- Channels (Data Transmission);
- Data Compression;
- Digital Data;
- Space Shuttle Orbiters;
- Feasibility Analysis;
- Performance Prediction;
- Superhigh Frequencies;
- Ultrahigh Frequencies;
- Voice Communication;
- Space Communications, Spacecraft Communications, Command and Tracking