Re: [Discuss-gnuradio] USRP for YPbPr ADC?

[Steve Schear]

At 02:11 PM 12/24/2004, Eric Blossom wrote:
> On Fri, Dec 24, 2004 at 01:57:48PM -0800, Steve Schear wrote:
> > At 01:19 PM 12/24/2004, Seth David Schoen wrote:
> > >Does anyone have any information that would tend to indicate how useful
> > >the USRP would be for digitizing a YPbPr component video signal?
> >
> > I have an active and funded project going that is designed to digitize a
> > YPbPr component video signal at 80 MSPS and 8/10-bits.  One option 
> provides
> > a lossless compressed output (between 4- 4.5-to-1) onto either USB 2.0 and
> > Firewire, which may be sufficient for at least 720p resolution.  No 
> current
> > plans for GNURadio use.
>
> Cool project.
>
> 80 MSPS * 3 channels * 1 byte/sample * 1/4.5 = 53.33e6 bytes/sec.
>
> Did I miss something, or how are you planning on getting that across
> the USB?  Do you have a host/peripheral controller pair that will
> sustain that kind of throughput?  If so, which ones?


:)

I only mean the A/D was capable of 80 MSPS.  Clearly that kind of data 
throughput for USB 2.0 is not practical, though I think FW/FW II can handle 
it.  720p requires only about (720 * 1280 * 60 * 3)/4.0-4.5 = 36.6-41.5 
MB/sec which may be possible over USB 2.0 according to what I have read on 
this list.

Steve