| 摘要 |
An interlace image signal for four fields stored in an image memory is read out on a line-by-line basis and stored in an IP conversion data buffer. An output signal is a progressive image signal whose one horizontal period is twice that of an interlace image signal which is an input signal. Accordingly, reading of data from the IP conversion data buffer is made to correspond to one horizontal period on the output side at the time of outputting, and the signal which is read out is subjected to IP conversion and written into an output data buffer. By reading data from the output data buffer while data is being written into the output data buffer, the capacity of the output data buffer can be reduced to that corresponding to two horizontal lines.
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