Other contributors have said "What is aliasing in dsp?" is the same question as "What si Effects of anti-aliasing?" If you believe that these are not asking the same thing and should be answered differently, click here
I'll take a shot at this, though it's a bit difficult to explain. OK.
Let's say you've got an array of pixels: 12345 67890 ABCDE If you try to draw a single black pixel line at 45 degrees on a...