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Sony Corp
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Sony Corp
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Application filed by Sony CorpfiledCriticalSony Corp
Priority to JP9580677ApriorityCriticalpatent/JPS5429921A/en
Publication of JPS5429921ApublicationCriticalpatent/JPS5429921A/en
PURPOSE: To realize an exact index signal by superposing a luminance signal from a image pickup tube a chrominance signal and an index signal, whose phase is inverted every 1H at the half frequency of the carrier-frequency of this chrominance signal, in an index filter.