Picture image recording memory control circuit

Claim 1

Apparatus for storing and retrieving data provided in a plurality of data units obtained from a plurality of lines of a read display medium, wherein each data unit includes a plurality of data bits, and wherein each data bit and each data unit from each line corresponds to other data bits and other data units from other lines, correspondence being determined by the location along the line from which the data was obtained, said apparatus comprising: memory means for storing the plurality of data units from each line in a manner to indicate the line of the read display medium from which the data unit was obtained; first up/down counter means capable of counting either up or down, for providing first address signals sequentially corresponding to consecutive lines of the read display medium, each said first address signal being used to indicate the line of data from which the data unit was obtained; second up/down counter means capable of counting either up or down, for providing second address signals sequentially corresponding to adjacent portions of the line of the read display medium from which data was obtained, each said second address signal being used to indicate the location along the line of the read display medium from which the data unit was obtained, said memory means being responsive to each pair of said first and second address signals for storing and retrieving one data unit; clock control means for controlling the count operation of said first and second up/down counter means to sequentially retrieve corresponding data units obtained from consecutive lines of the read display medium and for establishing the count direction of said first and second up/down counter means; means for selecting a corresponding data bit from each retrieved data unit; and display means for displaying the plurality of selected data bits on a write display medium.