27-01-2019, 08:30 AM
(This post was last modified: 27-01-2019, 08:35 AM by ppppenguin.)
The simplest method would be to ignore colour interpolation. Remember that there is excess vertical colour resolution in all the colour systems. Since there are only half the number of colour samples in a line (as compared to luminance) you only need double the memory to do cour, not triple.
Other approaches include a smaller Y interpolator. 3 lines is enough. BBC research showed that 4 lines gave minimal improvement over 3 and that more than 4 didn't give any improvement at all.
Forgot to say that you need 1 memory to do the sine and cosine tables for the NTSC modulator.
Virtually every FPGA design I have ever done has been limited by the amount of memory available
Other approaches include a smaller Y interpolator. 3 lines is enough. BBC research showed that 4 lines gave minimal improvement over 3 and that more than 4 didn't give any improvement at all.
Forgot to say that you need 1 memory to do the sine and cosine tables for the NTSC modulator.
Virtually every FPGA design I have ever done has been limited by the amount of memory available
www.borinsky.co.uk Jeffrey Borinsky www.becg.tv
