10 Apr
2017
10 Apr
'17
2:42 a.m.
I have the Phase 2 working, which is pretty exciting! The sound quality is generally
intelligible, but not the best. I was wondering if that is just the nature of Phase 2 or
if I have something configured wrong. It sort of sounds like the people are speaking
through a Kazoo.
A bunch of it is online here:
https://openmhz.com/pgcnorth https://openmhz.com/pgcnorth
And I have a attached a couple samples.
Are other folks getting better decodes?
- Luke
10 Apr
10 Apr
3:31 p.m.
New subject: Phase 2 Audio quality
two things to initially check, although it may be (for example) an analog-patched
talkgroup or some similar case where the source itself contributes to the issue.... First
confirm the problem occurs when using a stock version of OP25. Second make sure the
number of error bits being corrected by the Golay decoders for c0 and c1 is close to zero.
If not it could be you're incorrectly using the fsk4 demod (apparently all p2/tdma
systems prefer the psk demod)...
Max
11 Apr
11 Apr
1:08 p.m.
New subject: Phase 2 Audio quality
Thanks Max! I double checked and it is definitely in PSK mode.
I added some print outs to op25_imbe_frame.h in the imbe_header_decode() function. It
looks like there are some errors showing up there, it is generally 0 though. Is that the
right place to check for c0 & c1 errors?
Great idea on just running OP25. I tried to get it working on my Mac but ran into Python
errors. I will go try today on a Linux machine I have.
- Luke
2595
days inactive
2596
days old
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ikj1234i＠yahoo.com [op25-dev] -
lukekb＠gmail.com [op25-dev]