Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Home Electronics Ltd
Original Assignee
NEC Home Electronics Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NEC Home Electronics LtdfiledCriticalNEC Home Electronics Ltd
Priority to JP56153574ApriorityCriticalpatent/JPS5856579A/ja
Publication of JPS5856579ApublicationCriticalpatent/JPS5856579A/ja
Publication of JPH0421386B2publicationCriticalpatent/JPH0421386B2/ja
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