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author | jcorgan | 2007-08-30 01:28:27 +0000 |
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committer | jcorgan | 2007-08-30 01:28:27 +0000 |
commit | 975e25baef29afca48ef9b25558bf867515b4034 (patch) | |
tree | dc5e4f2f12f194fbcd63052eefad31be8c13eedd /gr-gsm-fr-vocoder/src/lib/gsm/README.gsm | |
parent | e754be9784681f3e439fa67f4e877fd6aeb44277 (diff) | |
download | gnuradio-975e25baef29afca48ef9b25558bf867515b4034.tar.gz gnuradio-975e25baef29afca48ef9b25558bf867515b4034.tar.bz2 gnuradio-975e25baef29afca48ef9b25558bf867515b4034.zip |
Merged -r6156:6213 from features/deb into trunk. Initial framework for creating Debian packages for 3.1 release. NOT FUNCTIONAL.
git-svn-id: http://gnuradio.org/svn/gnuradio/trunk@6214 221aa14e-8319-0410-a670-987f0aec2ac5
Diffstat (limited to 'gr-gsm-fr-vocoder/src/lib/gsm/README.gsm')
-rw-r--r-- | gr-gsm-fr-vocoder/src/lib/gsm/README.gsm | 37 |
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diff --git a/gr-gsm-fr-vocoder/src/lib/gsm/README.gsm b/gr-gsm-fr-vocoder/src/lib/gsm/README.gsm new file mode 100644 index 000000000..cb6af85cf --- /dev/null +++ b/gr-gsm-fr-vocoder/src/lib/gsm/README.gsm @@ -0,0 +1,37 @@ + +GSM 06.10 13 kbit/s RPE/LTP speech compression available +-------------------------------------------------------- + +The Communications and Operating Systems Research Group (KBS) at the +Technische Universitaet Berlin is currently working on a set of +UNIX-based tools for computer-mediated telecooperation that will be +made freely available. + +As part of this effort we are publishing an implementation of the +European GSM 06.10 provisional standard for full-rate speech +transcoding, prI-ETS 300 036, which uses RPE/LTP (residual pulse +excitation/long term prediction) coding at 13 kbit/s. + +GSM 06.10 compresses frames of 160 13-bit samples (8 kHz sampling +rate, i.e. a frame rate of 50 Hz) into 260 bits; for compatibility +with typical UNIX applications, our implementation turns frames of 160 +16-bit linear samples into 33-byte frames (1650 Bytes/s). +The quality of the algorithm is good enough for reliable speaker +recognition; even music often survives transcoding in recognizable +form (given the bandwidth limitations of 8 kHz sampling rate). + +The interfaces offered are a front end modelled after compress(1), and +a library API. Compression and decompression run faster than realtime +on most SPARCstations. The implementation has been verified against the +ETSI standard test patterns. + +Jutta Degener (jutta@cs.tu-berlin.de) +Carsten Bormann (cabo@cs.tu-berlin.de) + +Communications and Operating Systems Research Group, TU Berlin +Fax: +49.30.31425156, Phone: +49.30.31424315 + +-- +Copyright 1992 by Jutta Degener and Carsten Bormann, Technische +Universitaet Berlin. See the accompanying file "COPYRIGHT" for +details. THERE IS ABSOLUTELY NO WARRANTY FOR THIS SOFTWARE. |