JPS5454521A - Memory unit - Google Patents

Abstract

PURPOSE: To enable to use the memory capacity comparatively less with a good efficiency, by splitting the memory unit into n sets of memory blocks consisting of m sets of the unit memory sections respectively, and by keeping the relation of m=n^p (where; p is a natural number).

CONSTITUTION: The sequential write-in of the video signal for the first one field's share is made to the unit memory section 14 for one field's share, that is, the memory blocks 1 to m.n, and at the next field, together with the readout of the sequence of arbitrary desire, the video signal sequentially incoming to either of the blocks 1 to m.n of the memory section 14 immediately after the readout one after another is written in. Further, as to each field after that, the write-in immediately after the sequential readout is made, and the conversion of the scanning line sequence of the video signal is made under the control unit 15 driven with the synchronizing signal. Since the memory unit is split into n blocks consisting of m sets of unit memory sections and the relation of n^p=m (where; p is a natural number) is kept, the period of the replacement of the readout sequence is shortened and the constitution of the control signal generator controlling 15 the sequential replacement canbe made simple

COPYRIGHT: (C)1979,JPO&Japio