Currently we are using ADV7281A in our design where we have a source which is sending 720x480i input to the ADV7281A.
We have configured ADV7281A to output BT.656-3 480i, And, we are receiving 720x253 (even field) and 720x254 (odd field) at the SOC CSI RX.
After deinterlacing, we see that the deinterlaced 720x507 frame has horizontal and vertical black bands at the bottom, top and right side of the image. As shown in the pic below:
We have verified that the 720x253 (even field) and 720x254 (odd field) received by the SOC have the black bands and its not due to the deinterlacing.
Our source does not have any black bands in the input video stream.
Additionally, we also see a horizontal black line on the right side.
From the user guide we see that ADV7281A can only output either BT.656-3 or BT.656-4 complaint video.
Based on this observation we have following questions to you
- Can you confirm that ADV7281A is introducing the black bands at the top and bottom to be complaint to BT.656-3?
- How can we get rid of the horizontal black bands at the top and bottom?
- If we cannot avoid, can we move the black band to the bottom?
- How can we get rid of the vertical black band on the right side completely?
The pic shows the number of black lines for you reference (highlighted with neon color), based on the number of lines can you share the register settings to get rid of both horizontal and vertical the black lines?