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Radiotechnique SA
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Radiotechnique SA
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Publication of FR1141463ApublicationCriticalpatent/FR1141463A/en
H04N5/14—Picture signal circuitry for video frequency region
H04N5/16—Circuitry for reinsertion of dc and slowly varying components of signal; Circuitry for preservation of black or white level
H04N5/18—Circuitry for reinsertion of dc and slowly varying components of signal; Circuitry for preservation of black or white level by means of "clamp" circuit operated by switching circuit
H04N5/185—Circuitry for reinsertion of dc and slowly varying components of signal; Circuitry for preservation of black or white level by means of "clamp" circuit operated by switching circuit for the black level
FR1141463D1955-10-041955-10-04
Device for automatic black level regulation in television processes
ExpiredFR1141463A
(en)