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A digital audio/video interleaving systemA 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.
Document ID
19790056511
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Richards, R. W.
(NASA Johnson Space Center Houston, Tex., United States)
Date Acquired
August 9, 2013
Publication Date
January 1, 1978
Subject Category
Space Communications, Spacecraft Communications, Command And Tracking
Meeting Information
Meeting: NTC ''78; National Telecommunications Conference
Location: Birmingham, AL
Start Date: December 3, 1978
End Date: December 6, 1978
Accession Number
79A40524
Distribution Limits
Public
Copyright
Other

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