CVBS to HDMI conversion

Thanks Guenter,

      As per the datasheet , there is 4:1 HDMI mux,  confused with your statement 3 . Is it a limitation ?. Following is our application plan. Can you check the below and comments?

We have the HDMI adopter license. We already used this chip in another project for VGA to HDMI with another HDMI input through the mux. In this we haven't used the DDR interface. 

Hi

   Can you update on the DDR requirement 

Following is our current requirement, HDMI mux moved to external for supporting 4K 60Hz

Now we use 3 inputs ( CVBS, YPbPr and VGA). and 1x HDMI out

We already use this chip in our another design which used to convert VGA with extra HDMI input mux, we haven't used the DDR.

Does DDR required for the new requirement ?

Hi,

 The external DDR2 memory is required only for 3D comb and Frame TBC operation.
It support Advanced time-base correction (TBC) with frame synchronization for SD formats.

 The ADV7850 supports a DDR2 memory interface. Depending on the feature required, the appropriate memory device can be selected. It can use DDR2 external memory to simultane-ously provide 3D comb and frame TBC operation.

Thanks,

Poornima