A method to double the sample density of an orthogonally sampled picture.

摘要

In a well known way an orthogonally sampled television picture of standard definition can be converted into a pattern with the double density of picture elements by separately interpolating new picture elements both horizontally and vertically, whereby diagonal lines do not remain intact. According to the invention the process is such that first the orthogonally sampled picture is converted into a quincunx sampling pattern by interpolating new picture elements between the original lines. Then the quincunx pattern is converted into an orthogonal pattern by interpolating between these picture elements other new picture elements. The method is particularly applicable to display a television of standard definition in a high definition television.