| 摘要 |
An image memory control device for a video signal special reproduction system comprises a write-in section for writing in a video signal including a signal wherein the number of horizontal scan lines per field period is a multiple of 0.5 or not a multiple of 0.5 to a memory during one field period, selection signal generation section for generating a first selection signal or a second selection signal when it is determined that the number of horizontal scan lines per field period of the video signal which is written in the memory is close to an integer or close to a multiple of one-half, respectively, and readout section for repeatedly reading out a number of times the video signal to be subjected to special reproduction which is written in the memory, in response to the disignation of the special reproduction mode, by selectively renewing a read-out address of the memory into a starting address at elapsed one field period of the video signal or at elapsed sum or difference period between one field period of the video signal and 1/2 horizontal scan period, in response to the output signal from the selection signal generating section, so that the number of horizontal scan lines corresponding to a transient portion of adjacent fields of a readout video signal is constantly an integer or a multiple of one-half having a constant fraction smaller than +/-1/4.
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