26-01-2019, 04:03 PM
All of these things should be feasible. The important things to be done are:
1: Specifiying what you really want. You can always change your mind later if you were wrong.
2a: Learn enough about the design and VHDL to make the modifications.
or
2b: Persuade somebody who already knows enough to make the modifications
One of the great things about doing it yourself is that it's very hard to break anything however badly you get the VHDL wrong. If you've got the H timings wrong you find out why and put them right. If the output disappears completely then you hunt around the design until you curse yourself for making a daft mistake.
When I built a 625>405 converter as an exercise I did much of the development with a 625 line output. I've got much better testgear for 625 than 405. All the interpolator stuff worked just as well by shrinking the height of the picture.
1: Specifiying what you really want. You can always change your mind later if you were wrong.
2a: Learn enough about the design and VHDL to make the modifications.
or
2b: Persuade somebody who already knows enough to make the modifications
One of the great things about doing it yourself is that it's very hard to break anything however badly you get the VHDL wrong. If you've got the H timings wrong you find out why and put them right. If the output disappears completely then you hunt around the design until you curse yourself for making a daft mistake.
When I built a 625>405 converter as an exercise I did much of the development with a 625 line output. I've got much better testgear for 625 than 405. All the interpolator stuff worked just as well by shrinking the height of the picture.
www.borinsky.co.uk Jeffrey Borinsky www.becg.tv
