joachim/openwebrx-clone
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

use dc blocker and limiter to improve signal decoding

Browse Source
This commit is contained in:
Jakob Ketterl 2019-05-24 18:48:08 +02:00
parent 224c895718
commit 1846605184
1 changed files with 2 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
csdr.py
View File

@ -92,13 +92,13 @@ class dsp(object):
chain += "csdr tee {iqtee_pipe} | " chain += "csdr tee {iqtee_pipe} | "
chain += "csdr tee {iqtee2_pipe} | " chain += "csdr tee {iqtee2_pipe} | "
# safe some cpu cycles... no need to decimate if decimation factor is 1 # safe some cpu cycles... no need to decimate if decimation factor is 1
last_decimation_block = "csdr old_fractional_decimator_ff {last_decimation} | " if self.last_decimation != 1.0 else "" last_decimation_block = "csdr fractional_decimator_ff {last_decimation} | " if self.last_decimation != 1.0 else ""
if which == "nfm": if which == "nfm":
chain += "csdr fmdemod_quadri_cf | csdr limit_ff | " chain += "csdr fmdemod_quadri_cf | csdr limit_ff | "
chain += last_decimation_block chain += last_decimation_block
chain += "csdr deemphasis_nfm_ff {output_rate} | csdr convert_f_s16" chain += "csdr deemphasis_nfm_ff {output_rate} | csdr convert_f_s16"
elif self.isDigitalVoice(which): elif self.isDigitalVoice(which):
chain += "csdr fmdemod_quadri_cf | csdr fastdcblock_ff | " chain += "csdr fmdemod_quadri_cf | dc_block | csdr limit_ff | "
chain += last_decimation_block chain += last_decimation_block
chain += "csdr convert_f_s16 | " chain += "csdr convert_f_s16 | "
if which in [ "dstar", "nxdn" ]: if which in [ "dstar", "nxdn" ]: