NDLI: Delay related issues in integrated voice and data transmission: A review and some experimental work

Content Provider	ACM Digital Library
Author	Gruber, John G.
Abstract	This paper focuses on network delays as they apply to voice transmission. First the nature of the problem is discussed and this is followed by a review of circuit, packet and hybrid switching. The concept of introducing delay to resolve contention in speech interpolation is also noted, and when applied to both voice and data messages, forms a basis for a relatively new and so-called “transparent” approach to network design. The second part of the paper deals with experimental work. First, external link considerations involving subnet access by frame synchronous vocoders is discussed, and an experimental software interface is described which exploits the 60 to 65% idle time in voice calls. Secondly, based on the simulation of variable network delays, first indications are that with 180 ms “hangover”, the perceptable threshold of variable delay is about 200 ms average. Finally, suggestions for further works on performance analysis and subjective testing are made.
Starting Page	166
Ending Page	180
Page Count	15
File Format	PDF
DOI	10.1145/800092.802995
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	1979-11-27
Publisher Place	New York
Access Restriction	Subscribed
Content Type	Text
Resource Type	Article

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Delay related issues in integrated voice and data transmission: A review and some experimental work