A digital audio/video interleaving system
Abstract
A method of interleaving an audio signal with its associated video signal for simultaneous transmission or recording, and the subsequent separation of the two signals, is described. Comparisons are made between the new audio signal interleaving system and the Skylab Pam audio/video interleaving system, pointing out improvements gained by using the digital audio/video interleaving system. It was found that the digital technique is the simplest, most effective and most reliable method for interleaving audio and/or other types of data into the video signal for the Shuttle Orbiter application. Details of the design of a multiplexer capable of accommodating two basic data channels, each consisting of a single 31.5-kb/s digital bit stream are given. An adaptive slope delta modulation system is introduced to digitize audio signals, producing a high immunity of work intelligibility to channel errors, primarily due to the robust nature of the delta-modulation algorithm.
- Publication:
-
NTC 1978; National Telecommunications Conference, Volume 1
- Pub Date:
- 1978
- Bibcode:
- 1978ntc.....1...10R
- Keywords:
-
- Audio Equipment;
- Image Processing;
- Pulse Communication;
- Signal Processing;
- Video Equipment;
- Block Diagrams;
- Multiplexing;
- Space Shuttle Orbiters;
- Systems Engineering;
- Space Communications, Spacecraft Communications, Command and Tracking