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[Discuss-gnuradio] Questions on usrp_tv_rcv.py
From: |
Anastasopoulos Achilleas |
Subject: |
[Discuss-gnuradio] Questions on usrp_tv_rcv.py |
Date: |
Tue, 23 Jan 2007 13:15:31 -0500 (EST) |
Thanks for pointing out all theses raw files
for testing the usrp_tv_rcv.py application.
I tried a couple of them and they work fine.
Now I have the following question:
Why is it that the video shown on sdl moving
slowly to the right?
The fact that there is no vertical or horizontal
synchronization should NOT explain this:
I use a decimation of 8 thus the video rate is 8M.
With 625 lines per frame and 25 frames per second, this results in
512 samples per line (exactly), ie, 8,000,000/25/625=512.
So one would have expected to see the corresponding picture
not aligned in the vertical/horizontal dimension,
BUT AT LEAST the misallignment should have been CONSTANT over time.
This is clear in the vertical dimension (no up/down sliding)
but not in the horizontal...
What is the explanation of this?
Thanks
Achilleas
PS: one explanation I can think of is the
instability of the 64M ADC...
- [Discuss-gnuradio] Questions on usrp_tv_rcv.py,
Anastasopoulos Achilleas <=