Multiplexed television signal processing system
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United States of America Patent
Stats
-
Mar 2, 1982
Grant Date -
N/A
app pub date -
Aug 1, 1980
filing date -
Aug 13, 1979
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A signal processing system in a transmission system like Teletext System in which a binary signal is superimposed on a television signal for transmission is disclosed. When the binary signal is received, an upper (or lower) level of a pilot signal in the binary signal is clamped to a first reference voltage by a clamp circuit while the amplitude of the pilot signal is controlled by a variable gain amplifier such that the lower (or upper) level of the pilot signal becomes equal to a third reference level. The binary signal is then amplitude-discriminated using a second reference voltage as a discrimination reference. In this manner, the binary signal is correctly converted to a digital signal.
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Family
International Classification(s)
Cited Art Landscape
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