| 摘要 |
Color video still picture playback apparatus enhances the quality of a color still picture reproduced from a video record medium. The reproduced signal is formatted as one field of video containing a succession of lines with first and second color difference signals provided in alternating line sequence. The reproduced picture, after processing, is formatted as alternating first and second fields, each having a plurality of lines such that the lines of the second field are interpolated between successive lines of the first field, and the color difference signals are provided as continuous signals, with interpolated signals being provided in alternate lines. To achieve this, first and second switches operated at the field rate are associated with first and second delay lines of one-half-line and one line delay times, respectively, and an adder circuit connects the outputs of the delay lines to one input of the second switch. This interpolates and half-line-offsets the lines of the video signal to produce the interpolated second field of the luminance signal. Third, fourth, and fifth switches, associated with third, fourth, and fifth delay lines and a second adder circuit interpolate the color difference signals so that outputs of the fourth and fifth switches provide continuous color difference signals. The third switch is operated at the field rate, while the fourth and fifth switches are operated at the line rate.
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