I have a ComExpress modul with an eDP/HDMI and a LVDS output. But I need a HDMI AND a CVBS(PAL/NTSC) output.
Is there a solution with AD parts ?
Thanks for your help
It really depends on what your NTSC is going to be output on. If it from the HDMI port then something like a ADV7612 --> ADV7393 might work. If it's over the LVDS port then something like LVDS to TTL convert --> ADV7393 might work. I'd need a lot details before I could really recommend a solution.
Which ComExpress board are you using?
Thanks for your reply.
I need a LVDS to CVBS conversion. The LVDS transmitter is a “Realtek RTD2132” or “NXP PTN3460” .
In Windows 8 I only can use 1024x768 @ 60Hz.
We want connect a small TV monitor on the LVDS port and a bigger monitor on a HDMI port.
The ComExpress Module is a Adlink nanoX-BT .
First configure the board for the format you want setting the pixel bus to 16-bit YCbCr, then convert the LVDS to TTL levels using your favorite buffer, then using a ADV7393 to convert analog TV signals and a ADV7511 to convert to HDMI. Both monitors will show the same image.
LVDS --> TTL buffer --> ADV7393 --> small analog TV
--> ADV7511 --> big HDMI monitor
The LVDS only support 24Bit RGB. So I need a solution for 24Bit RGB to CVBS .
The HDMI Port is jnot more necessary.
(Günther, where do you come from ? Germany ?)
OK, so look at the ADV725 instead of ADV7393, it's an older part but still in production
AD725 datasheet and product info | RGB to NTSC/ PAL Encoder | Video Encoders | Analog Devices
Is the ADV725 also a scaler ? Because my LVDS output only deliver 1024x768@60Hz, but PAL has 720x576, 480x576 or 352x288 ...
No, it is not a scaler. neither is the ADV7511. It's more complicated then just scaling, you also have to do progressive to interlace conversion and frame rate conversion. You want to go from 1024x768@60 to 576i@50, not an easy task.
We have the ADV8005 which would do this. You could develop your own FPGA code to do this but it would be rather complex including enough memory to store at least one frame of video.
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