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Old 13th August 2008, 10:10   #13  |  Link
IanB
Avisynth Developer
 
Join Date: Jan 2003
Location: Melbourne, Australia
Posts: 3,167
Borrowing and correcting (Mpeg1 versus Mpeg2 placement) Manao's nice ascii art :-
Code:
X   X   X   X ----> Top luma

O       O   ----> Top chroma

*   *   *   * ----> Interpolated luma



X   X   X   X ----> Top luma

+       +   ----> Interpolated chroma

*   *   *   * ----> Interpolated luma
What is conceptually so difficult about this, practicality is another matter
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