17-05-2017, 05:47 AM
Having a decent TPG is more or less essential for standards converter development.
There is also a trick that is very useful - using the converter's own memory as a pattern generator. This is especially valuable with a framestore. It's not hard to rig up an arrangement that allows a PC to write to the framestore (and control the rest of the converter too). I use a parallel port on an old W98 machine to do bit bashing from programs writtenin QuickBasic but I'm sure there are plenty of more modern approaches.
The great thing about this approach is that you can separate the input and output systems of the converter. You can prove the output system using known test patterns which you can readily customise to measure particular aspects of the converter.
There is also a trick that is very useful - using the converter's own memory as a pattern generator. This is especially valuable with a framestore. It's not hard to rig up an arrangement that allows a PC to write to the framestore (and control the rest of the converter too). I use a parallel port on an old W98 machine to do bit bashing from programs writtenin QuickBasic but I'm sure there are plenty of more modern approaches.
The great thing about this approach is that you can separate the input and output systems of the converter. You can prove the output system using known test patterns which you can readily customise to measure particular aspects of the converter.
www.borinsky.co.uk Jeffrey Borinsky www.becg.tv
