TVout output @TV & LCD working but not @carradio with monitor (RVC)

Other Hardware Displays
1

Hello @all.

My name is Reiner (from Germany) and this is my first topic in this nice forum.

I have some expiriences with programming Arduino and some knowledge in electronic, but no idea about video signals.

I am planning now a project for my car, and want to give some info via TFT on my car radio (using the RVC input). This TFT need NTSC and working well with a RVC (in colour).

At home I use a simple 2" TFT and the video output from Ardiuino is working well:

1134×2016 312 KB

Then I connect it onto car radio RVC input and get no screen or a screen without any movemend and seems like not in sync / get freezed frame:

1134×2016 215 KB

I try with some changes of timings in VIDEO_ROPERTIES.H but best result was a shifted screen from top to bottom:

Youtube Video 

//Timing settings for NTSC
#define _NTSC_TIME_SCANLINE			63.55
#define _NTSC_TIME_OUTPUT_START			12

#define _NTSC_LINE_FRAME			262  ===> Changed to 285
#define _NTSC_LINE_START_VSYNC			0
#define _NTSC_LINE_STOP_VSYNC			3
#define _NTSC_LINE_DISPLAY			216

I check video signal of RVC (colour but slose the camera to generate a black screen):

1280×1707 211 KB

Same with TVout and black screen:

1280×1707 195 KB

As I can see the difference seems to be the burst-signal (maybe only need for colour?).
So I guess the video decoder inside my radio (TWC9900) need that burst?
But then why it is partially working? see video.

Input schematic of RVC input at car radio:

705×341 19.1 KB

Please any ideas?
Or someone get simialr issues and was able to fix it?

2

I've never seen a display device that requires a colour burst, but I have seen a few that require a correct sequence of equalisation pulses during vertical blanking.

In The Good Old Days of analogue displays, you could feed them just about any old junk, and you would get a reasonable display, but some modern displays require a fully standard compliant signal, and not all libraries provide that.