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| author | Gustavo Conrad <gus3963@gmail.com> | 2018-02-05 21:51:48 +0000 |
|---|---|---|
| committer | Willy Sudiarto Raharjo <willysr@slackbuilds.org> | 2018-02-10 08:09:30 +0700 |
| commit | 610c6811e0e53cf3fbe55e013a03d98b278a4b31 (patch) | |
| tree | f90594059c36815dafa513f1aca369159d801dee /ham/freedv/README | |
| parent | 18c21cef7d969fd8e6ff8df11b006e084852f0e4 (diff) | |
| download | slackbuilds-610c6811e0e53cf3fbe55e013a03d98b278a4b31.tar.gz | |
ham/freedv: Added (Open source amateur digital voice).
Signed-off-by: David Spencer <idlemoor@slackbuilds.org>
Diffstat (limited to 'ham/freedv/README')
| -rw-r--r-- | ham/freedv/README | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/ham/freedv/README b/ham/freedv/README new file mode 100644 index 0000000000..a300f26833 --- /dev/null +++ b/ham/freedv/README @@ -0,0 +1,19 @@ +FreeDV is a Digital Voice mode for HF radio. + +You can run FreeDV using a free GUI application for Windows, Linux and +OSX that allows any SSB radio to be used for low bit rate digital +voice. Alternatively you can buy a SM1000 FreeDV adaptor that allows you +to run FreeDV on any HF radio without a PC or sound card. + +Speech is compressed down to 700-1600 bit/s then modulated onto a +.25 kHz wide signal comprised of 16 QPSK carriers which is sent to the +Mic input of a SSB radio. The signal is received by an SSB radio, then +demodulated and decoded by FreeDV. FreeDV 700C is approaching SSB in +its low SNR performance. At high SNRs FreeDV 1600 sounds like FM, +with no annoying analog HF radio noise. + +FreeDV was built by an international team of Radio Amateurs working +together on coding, design, user interface and testing. +FreeDV is open source software, released under the GNU Public License +version 2.1. The modems and Codec 2 speech codec used in FreeDV are +also open source. |