DocumentCode :
920429
Title :
Reception of Teletext Under Multipath Conditions
Author :
Goyal, K. ; Armfield, Stephen C.
Author_Institution :
GTE Laboratories Incorporated
Issue :
3
fYear :
1979
fDate :
7/1/1979 12:00:00 AM
Firstpage :
378
Lastpage :
392
Abstract :
Information for data broadcasting services such as Teletext is transmitted as digital signals inserted in the vertical interval of the television video waveform. The specifications for these signals are drawn very carefully to ensure compatibility with the existing television system. This paper examines some of these specifications such as data rate and waveform shape, which must be selected to maintain the spectral energy within the television bandwidth. Using computer simulation, the transmitted signal and encoded teletext data (as defined in Broadcast Teletext Specifications´) will be examined for different multipath conditions. For all these experiments, echoes have been generated and evaluated at the baseband, ignoring system amplitude and group delay characteristics. These, in general, will have additional influence on decoding reliability.
Keywords :
Bandwidth; Baseband; Character generation; Computer simulation; Decoding; Delay; Digital video broadcasting; Shape; TV broadcasting; Teletext;
fLanguage :
English
Journal_Title :
Consumer Electronics, IEEE Transactions on
Publisher :
ieee
ISSN :
0098-3063
Type :
jour
DOI :
10.1109/TCE.1979.273258
Filename :
4050190
Link To Document :
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