C
Caj Zell
- Jan 1, 1970
- 0
Hello!
I have a video encoder, an ADI 7183, that is behaving quite strange.
It is supposed to output NTSC and when I hook it up to a TV it
displays the picture perfectly. But, on LCD/TFT devices I have (and I
have tested three different LCD screens!), the picture is
1. lowered about a tenth of the height and
2. in the remaining upper gap the picture is black with occasional
white boxes (concentrated to the left half)
i.e.
looks (very approximately) like
* * * * * ***********
* * * * * ***********
*********************
original picture con-
tent shifted down 1/10
and consequently the
bottom 10th is missing
I think this may have to do with the LCD screens misinterpreting the
vertical sync and start displaying the top lines to early during the
vertical blanking interval. But, why is this only happening on LCD
screens and everythings fine on a Sony TV (with automatic NTSC/PAL
detection)? Has anyone come across this phenomenon?
Caj Zell
I have a video encoder, an ADI 7183, that is behaving quite strange.
It is supposed to output NTSC and when I hook it up to a TV it
displays the picture perfectly. But, on LCD/TFT devices I have (and I
have tested three different LCD screens!), the picture is
1. lowered about a tenth of the height and
2. in the remaining upper gap the picture is black with occasional
white boxes (concentrated to the left half)
i.e.
looks (very approximately) like
* * * * * ***********
* * * * * ***********
*********************
original picture con-
tent shifted down 1/10
and consequently the
bottom 10th is missing
I think this may have to do with the LCD screens misinterpreting the
vertical sync and start displaying the top lines to early during the
vertical blanking interval. But, why is this only happening on LCD
screens and everythings fine on a Sony TV (with automatic NTSC/PAL
detection)? Has anyone come across this phenomenon?
Caj Zell