Video from digital data

I have CCD image sensor (EIA B/W) and its output is connected to Analog Front End(AFE). The output of AFE is 12 Bit Digital data at the rate of 9 MHz. I am thinking to get this digital data to my computer using MATLAB Data Acquisition tool box and NI's hardware PCIe 6536. What is the best way to create a video from my digital data (12Bit @ 9 MHz plus sync signals) using MATLAB?

[Walter Roberson]

Duplicate is at http://www.mathworks.com/matlabcentral/answers/40016-video-capture

Answer 1

[Walter Roberson]

That device is too slow for your purposes. It handles a maximum of 25 megabits per second per channel, whereas you need at least 108 megabits per second (plus sync)

http://sine.ni.com/nips/cds/view/p/lang/en/nid/202772

The entire 653x line is too slow for your purposes. You need a 6545, 6547, or 6548 to go as fast as you need -- but all three of those are only available in PXI Express, not PCIe .

Note that the 653x and 654x are digital I/O series, so implicitly 1 bit per sample (which is why you need to go past 100 MHz sampling rate to get your 9 MHz x 12 bits). The consequence of this is that you might have difficulty in detecting the sync, as sync is usually analog processing (or at least multiple bits per sample when digitized.)

I don't know if you would be able to get data out for your purposes, but look at the 5124 and related products http://sine.ni.com/nips/cds/view/p/lang/en/nid/203051 -- you might be able to get away with even a 5105 http://sine.ni.com/nips/cds/view/p/lang/en/nid/206411 but I am not certain if it has enough bandwidth product (60 MHz analog bandwidth even though it is a 12 bit digitizer that can operate at 60 MS/s). Note: the 51xx series needs a PXI chassis and controller with it, so take those into account in pricing concerns!

[Hari Patel]

@ Walter Roberson

Thank you so much for your reply.

I have 12 Bit data @ 9 MHz but I have 12 different channels (AFE output) to transfer each Bit of data and separate channel for sync too. So I think I just need maximum of 9 MHz of speed per channel while the PCIe 6536 offers 25 MHz per channel.

[Walter Roberson]

To confirm: the bits are one channel each? Or is there a single 12-bit-wide channel for the data?

I find myself confused by the specifications on the 6536. The overview says that it supports "100 MB/s". "MB" is the abbreviation for megabytes. Everything else is quoted in megabits. I'm not sure what the MB specification means, and I was not able to find anything relevant to throughput in the detailed specification documents. There is a _possibility_ that it it is derived from 32 channels = 32 bits = 4 bytes, times 25 MHz. If so then Yes, it should be able to handle your throughput.

[Hari Patel]

Yes, Thats true. I have 1 Bit per channel and total 12 channels. So total 12 Bits and then separate channel for sync pulse.

[Walter Roberson]

Unusual device, that AFE...

It appears to me that you should be able to use even the 6535 which is about $800 less expensive.

[Hari Patel]

I know, I can use 6535 as it supports 10 MHz and I doubt it might be an ideal case. So I just wanted to be on safe side. I also asked the same question about 6535 to NI sales engineer and I waiting for reply.