| 摘要 |
<p>In a method of printing, a mutiple printing head having k print points is utilized. The video signals of a steady television picture are continuously converted into binary code, the produced binary samples representing a grid of points, that are continuously repeated, wherein m horizontal lines correspond to the television lines, each line comprising n points. The vertical lines formed by the grid points are grouped to form n/k columns each comprising k vertical lines. The point bits are transmitted to the printing head beginning by the point bits of the first line and the last column, then those of the second line and the last column, and so on up to those of the mth line and the last column. The actual recording medium is then shifted by a length corresponding to the width of the printing head. Then the point bits of the first line and the last but one column are transmitted to the printing head, and so on up to those of the mth lines and the last but one column, then those of the second line and the last but one column, then the actual support is shifted as previously. The transmission operations for the point bits, interrupted by head shifts, are repeated column by column to print the points of the mth line of the first column. During the course of the bit transmission to the printing head, the point bits pass through a buffer memory from which they are read out to the printing head. A write operation is performed line by line by selecting the point bits belonging to the column being printed and to the line that follows the one whose point bits have just been written into the buffer memory. The selection of the data to be written is made either in the same frame of video signals or in different frames. An alternative embodiment facilitates the provision of colored areas.</p> |
