Hi,
I do developpment on the DM8168 EVM board+Vs child Board, and DVRRDK_02.00.00.23 is used to do software developmment.
As DM8168 can encode 3 channels of 1080p /60fps video image, i want to use it to encode 5 channels of xga video image.
And i find only three vports tow for capturing and one for display, then how can capture the video images more than tow channels?
I think two meothds to solve this problem.
1. Using PCIe + video capture board
2.Using FPGA capture and sharing mem with Dm8168
All this two shemes are not so easily to completed.
Is there other sheme? Link for TVP5185 capture 4 D1 video image at the same time?
xavier
thank you
Each 5158 can pull in up to 4 channels of video, which get multiplexed into a stream going to the 8168. The EVM I have has a daughterboard with four 5158s, allowing 16 channels of simultaneous input.
TVP5158 not support HD
Video capture H/W supports upto 4 8-bit ports. So for XGA you can use BT656 kind of input which is 8-bit. With this you will be able to capture 4-XGA streams. You may have to use FPGA to convert XGA BT1120 to XGA BT656 format.
Regards,
Hardik Shah
Please mark this post as answered via the Verify Answer button below if you think it answers your question. Thanks!
Hi, Hardik Shah
Thank you for your replay! Is there any chip can completed convert XGA BT1120 then ?
I am not aware of any such chip. I think you may have to use FPGA.
Ok! If bt656 xga is used ,the image quality will loss then ?
Both 656 and 1120 will suffer a color fidelity loss, yes, since you will be both converting to YUV and decimating the chroma channel.
BR,
Steve
If bt656, the image will be down sample to 720?
There will not be any resolution down sampling, no.
656 is simply a data transfer protocol. There is no inherent change in the data.
What is really happening is that the 656 protocol is being 'modified' in order to transfer an image of different size/frame rate etc...
All we are really using from the 656 protocol is the concept of SAV and EAV coding to encapsulate a video image frame.