DocumentCode
2603296
Title
Genlocked digital overlay on a video signal
Author
Eldon, John A.
Author_Institution
Raytheon Semiconductor, La Jolla, CA, USA
fYear
1993
fDate
3-6 May 1993
Firstpage
17
Abstract
The synchronization problems involved in mixing computer graphics with a video signal are outlined, and it is shown how two components solve them. The components, a video encoder and a genlocking digitizer facilitate overlays of digital computer graphics and/or text data onto a standard analog NTSC (National Television System Committee) or PAL baseband television signal. The mapping of the clock and subcarrier recovery algorithm and the video encoding procedure into the architectures of the two chips is discussed
Keywords
analogue-digital conversion; image coding; multimedia communication; rendering (computer graphics); synchronisation; video coding; PAL baseband television signal; analog NTSC TV signal; computer graphics; genlocking digitizer; subcarrier recovery algorithm; synchronization problems; video encoder; video encoding procedure; video signal; Baseband; Clocks; Computer errors; Computer graphics; Frequency synchronization; Frequency synthesizers; Image processing; Sampling methods; Signal generators; TV;
fLanguage
English
Publisher
ieee
Conference_Titel
Circuits and Systems, 1993., ISCAS '93, 1993 IEEE International Symposium on
Conference_Location
Chicago, IL
Print_ISBN
0-7803-1281-3
Type
conf
DOI
10.1109/ISCAS.1993.393644
Filename
393644
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