DocumentCode
1808193
Title
Use of the vertical blanking interval on BBC distribution
Author
Spicer, Colin ; Barlow, Peter
Author_Institution
BBC Project Manage. Services, London, UK
fYear
1994
fDate
34510
Firstpage
42401
Lastpage
42404
Abstract
The allocation of VBI lines to local and network noise, Datacast, Ceefax, teletext audio tests, subtitles, the one-line (21/334) Insertion Test Signal and transmission tests is set out and the possible future developments are outlined. A new teletext talkback system is foreshadowed, data distribution and technical security are discussed, and the principle of VBI signal routing in the Regions is explained diagrammatically
Keywords
teletext; television broadcasting; BBC distribution; VBI signal routing; allocation of VBI lines; data distribution; future; technical security; teletext talkback system; vertical blanking interval;
fLanguage
English
Publisher
iet
Conference_Titel
Time between Pictures - The Vertical Blanking Interval, IEE Colloquium on
Conference_Location
London
Type
conf
Filename
284547
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