A customer wants to transmit video from multiple camera thru a coaxial cable and is looking for a serializer and deserializer. I understand that the DS90UB960 serializer transmits the images via twisted pair cable. Do we have other devices that meets the customer's requirement?
Hi Danilo, We have many pairings of SER-DES pairs for camera applications. Could you please be more specific about the system level specifics?
e.g. : parallel/CSI-2 input/output, max data rate (input and output), GPIO?, how many cameras (input) and how many output ports?, etc.
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In reply to Sally Cheung95:
Sorry for the late reply. I switched form my personal account to the University account and encountered some problems. Everything seems to be okay now.
We are currently working on a project which will most probably have multiple CMOS image sensors (for instance 3 of them) to capture the environment. The user requires to view the frames in real-time on a screen which is located around 10m away from the cameras system (distance might change but should not exceed 30m). We are looking for a solution to transfer the images in real-time from the cameras to the screen over a single coaxial cable.
The cameras which will be used are CMOS image sensors such as the OVM7690 and the OVM7692. To give you an idea, the OVM7690 is a 640 x 480 image senor wit processor that:
The OVM7692, and other image sensors that could be considered for this application have similar specifications.
What solutions do you suggest to 'broadcast' data from multiple cameras to a receiving node (in this case a screen or PC system) over a coaxial cable?
Please find attached a simple diagram showing what we are after (a block diagram showing what we require - part numbers are only there as an example and will be changed depending on your advice). Thank you in advance.
Junior Electrical Engineer (R&D) (UoM)
In reply to Brian Azzopardi:
Hi Brian, I think you forgot the attachment or it didn't go through. For a DVP camera output, I would suggset DS90UB913Q-Q1. The minimum PCLK is 10 MHz and the pclk you gave me is ~9 MHz. However, the DS90UB913Q-Q1 only supports STP. If you are able to increase the PCLK to 25 MHz, then you can use the DS90UB913A-Q1 which has coax support. These are the serializer reccomendations. You will need to specify the interface of whatever is connecting to the PC so I can suggest a deserializer.
PCLK = tot_horizonal * tot_vertical * fps
Yes, I forgot to attach the image, please find it attached.
Regarding your reply, I have a couple of question to ask please.
Interface to PC
Ideally, we would have
Is it possible for you to use a hub style device on the deserializer side to take in multiple individual cameras and aggregate into one output port using CSI-2? This is the standard method for multi-sensor systems:
Example multiple DS90UB913Q-Q1 to DS90UB964-Q1. 10MHz is the lowest PCLK frequency DVP mode we have support for in this type of configuration.
In reply to Casey McCrea:
Sorry for the late reply. Does the suggested solution above require multiple coax/STP lines (one coax able or STP pair for each camera) or am I not understanding well?
The solution proposed above by Casey would still require 1 STP/coax cable for each camera. You could send all the cameras + 1 cable per device into 1 single deserializer hub. This can aggregate all the cameras into one CSI-2 interface output. If you have a specific need for DVP interface to the processor/FPGA/computer, there is no option to aggerate all the cameras in such a way.
Thank you for the information. Will review all options and decide on how to proceed.
Thanks again for your assistance.
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