diff options
| author | trondeau <trondeau@221aa14e-8319-0410-a670-987f0aec2ac5> | 2007-04-07 01:31:18 +0000 |
|---|---|---|
| committer | trondeau <trondeau@221aa14e-8319-0410-a670-987f0aec2ac5> | 2007-04-07 01:31:18 +0000 |
| commit | 36c0ba64703776f4cc2a77adc00740b05e0b055d (patch) | |
| tree | 0d0fd755be5069d373c816b46441328d3447d4b0 /gr-cvsd-vocoder/src/python/cvsd.py | |
| parent | abda07ea005562a7031ddeec80f86595632de889 (diff) | |
merged developer branch trondeau/cvsd -r4801:4904 to add CVSD vocoder and example code
git-svn-id: http://gnuradio.org/svn/gnuradio/trunk@4906 221aa14e-8319-0410-a670-987f0aec2ac5
Diffstat (limited to 'gr-cvsd-vocoder/src/python/cvsd.py')
| -rw-r--r-- | gr-cvsd-vocoder/src/python/cvsd.py | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/gr-cvsd-vocoder/src/python/cvsd.py b/gr-cvsd-vocoder/src/python/cvsd.py new file mode 100644 index 0000000000..dcb6bb5074 --- /dev/null +++ b/gr-cvsd-vocoder/src/python/cvsd.py @@ -0,0 +1,52 @@ +#!/usr/bin/env python +# +# Copyright 2007 Free Software Foundation, Inc. +# +# This file is part of GNU Radio +# +# GNU Radio is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 2, or (at your option) +# any later version. +# +# GNU Radio is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with GNU Radio; see the file COPYING. If not, write to +# the Free Software Foundation, Inc., 51 Franklin Street, +# Boston, MA 02110-1301, USA. +# + +from gnuradio import gr +from gnuradio.vocoder import cvsd_vocoder + +class cvsd_encode(gr.hier_block): + def __init__(self, fg, resample=8): + scale_factor = 32000.0 + self.interp = resample + + src_scale = gr.multiply_const_ff(scale_factor) + interp = gr.interp_fir_filter_fff(self.interp, self.interp*(1,)) + f2s = gr.float_to_short() + enc = cvsd_vocoder.encode_sb() + + fg.connect(src_scale, interp, f2s, enc) + gr.hier_block.__init__(self, fg, src_scale, enc) + + +class cvsd_decode(gr.hier_block): + def __init__(self, fg, resample=8): + scale_factor = 32000.0 + self.decim = resample + + dec = cvsd_vocoder.decode_bs() + s2f = gr.short_to_float() + decim = gr.fir_filter_fff(self.decim, (1,)) + sink_scale = gr.multiply_const_ff(1.0/scale_factor) + + fg.connect(dec, s2f, decim, sink_scale) + gr.hier_block.__init__(self, fg, dec, sink_scale) + |