| 摘要 |
A slow motion converter for field sequential color television signals provides selection of an integer speed reduction factor and conversion of the field sequential signals to simultaneous color signals for processing to an NTSC color television signal. The converter includes helical tape playback apparatus for reading the field sequential signals from a magnetic recording tape and a magnetic drum including a plurality of recording heads corresponding to the color fields and write control means for selectively energizing the recording heads to record each color field, in sequence, on its corresponding recording band. A ratio selector, set to the desired speed reduction factor, effects repetitive reading from the tape of each recorded color field signal, and recording of each field sequential signal thus read on its corresponding reading band of the drum. Each previous recording on a given band of a given field signal is erased such that only the last of the repetitively read field signals from the tape remains recorded on its corresponding drum band. As the plurality of odd and even color field recordings on the drum are updated sequentially, the alternate odd or even set of previously recorded color field signals is simultaneously and repetitively read out from the drum a number of times corresponding to the speed reduction factor to provide the slow motion conversion, the simultaneous color field signals read in alternating sets thereof being processed for producing an NTSC color signal.
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