| 摘要 |
<p>In digital video, 3:4 up conversion and 4:3 down conversion are transparently cascaded. The up conversion filter is: Sup(n)=ΣSinput(k) . g(3n - 4k) and the down conversion filter is: Sdown(n)=ΣSup(k) . h(4n - 3k). The pair of up and down conversion filters are designed so that Σh(4n - 3k) . g(3k - 4m) is equal to unity if n = m and is otherwise equal to zero.</p> |
