Wuest Brandon-WTVR47 schrieb:
All,
In the hopes of trying to understand the various aspects of GNU Radio
and the USRP hardware, I am trying to use the ATSC demodulator
included with GNU Radio to create an MPEG transport stream from the
output of usrp_rx_cfile.py. Something I know has been discussed many
times on this forum.
I am having a problems with disk writing not being able to keep up
with the high data rate, so I am trying to do a little manipulation of
the IQ data to get around this. What I am trying to do it get 8-bit
samples from the usrp (which my disk can keep up with) and then before
I feed that in to interp.py, I convert every pair of bytes to
a complex<float>.
Perhaps I missed something here... if you are having problems recording
2 '8-bit' integers, why would converting those integers to floats, that
is creating now 2 4 byte quantities... improve performance in any way.
Back when I worried about such things, I usually thought about
maintaining everything in 'integer' form, and should I have needed a
'FFT', I would start thinking
about Galois Fields, prime generator polynomials... and the like, but
stay with integers...
John Clark.
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