公开(公告)号：US4301473A

公开(公告)日：1981-11-17

申请号：US123864

申请日：1980-02-22

申请人： Kurt F. Wallace ,  Greg G. Frye ,  David A. Grayson

发明人： Kurt F. Wallace ,  Greg G. Frye ,  David A. Grayson

IPC分类号： H04N3/24 ,  H04N5/14

CPC分类号： H04N5/14 ,  H04N3/24

摘要： The resolution of relatively low resolution type information signals is enhanced by inserting black level signals between adjacent picture elements at predetermined positions in each odd horizontal scanning line, and inserting black level signals between adjacent picture elements at different predetermined positions in even horizontal scanning lines. The black level signals are inserted by extinguishing a CRT beam in accordance with phase displaced clock signal trains, preferably phase displaced by 180.degree..

摘要翻译： 通过在每个奇数水平扫描行中的预定位置处的相邻像素之间插入黑电平信号，并且在偶数水平扫描行中的不同预定位置的相邻像素之间插入黑电平信号，来增强相对低分辨率信息信号的分辨率。 根据相移时钟信号列熄灭CRT光束，最好相位偏移180°，插入黑电平信号。