d2c4ca4fa9
Implementation of Advanced Mobile Phone Service (AMPS)
2016-06-17 17:03:29 +02:00
7d5d3da8d3
Add function to display wave form from input/loop
...
Use 'w' to toggle display.
Move terminal input processing and main loop to main_common.c
2016-06-17 17:03:28 +02:00
1d20119d85
common code: Call control allows to re-dial after disconnect
...
No hangup key required before that anymore.
2016-06-12 16:16:37 +02:00
7cfd11eb17
common code: Add feature to select debug category rather than showing all
2016-06-12 16:14:29 +02:00
4d22b11855
common code: Add debug #define for capture generated singal
...
Used for fundamental debugging of encoded signal
2016-06-12 16:11:20 +02:00
7aa2445b47
Move amplitude (level) debugging to debug.c
2016-05-15 20:37:06 +02:00
27e8b03df5
Fixup typo on jitter code
2016-05-13 09:37:02 +02:00
42eefe90bf
common code: Fixed de-emphasis by adding high pass filter
...
This high-pass filter filters out DC and frequencies below 300 Hz.
Now de-emphases will not cause low frequencies to saturate audio level
range or cause too high levels on low frequencies.
2016-05-13 09:37:02 +02:00
57ba648ac4
C-Netz: Add tiny database to track if phones are online
...
Reject calls, if not online.
Use an interval to check if the phones are still online.
2016-05-08 15:53:00 +02:00
bae12156a2
common code: Add input gain option
2016-05-08 15:49:45 +02:00
7434e21dc2
Multi transceiver support
...
This can be multiple transceivers on multiple sound cards.
Two transceivers can be bundled on one sound device as well, using both channels.
2016-05-08 15:48:13 +02:00
28e7f1e9d1
common code: Remove DC level before using Goertzel filter
...
A DC level degrades the quality of the filtered result
2016-05-01 15:15:19 +02:00
0c99848120
common code: Make preemphasis 0 dB @ 1000 Hz
2016-05-01 15:14:57 +02:00
16acdbf59d
Implementation of C-Netz (German mobile telephone system)
2016-04-24 15:19:00 +02:00
4b3e3385b5
common code: Fix sample rate conversion
2016-04-24 15:18:59 +02:00
4356c93afa
common: Add pre and de emphasis, if the radio does not support it
...
Connect to the oscillator of the transmitter - good girl!
You need to enable pre emphasis in this case.
Connect to the discriminator of the receiver - good boy!
You need to enable de emphasis in this case.
2016-04-24 15:14:56 +02:00
2a092b8cf7
Fixing compander
2016-04-24 15:10:25 +02:00
9de121109d
common code: Sample rate conversion now supports any rate above 8000 Hz
2016-04-17 16:49:39 +02:00
05402283df
common code: Add function request information, if timer is running
2016-04-17 16:49:08 +02:00
4d84da31a8
Fixing timer handling
...
Usage of more than one timer caused a lock-up.
2016-03-27 17:56:04 +02:00
1146537d84
common code: Add feature to record received audio and replay it
...
-W <file.wav> writes a wave file of received audio
-R <file.wav> reads a wave file to feed into decoder
This way you can record a phone and later debug without a phone
and radio equipment.
2016-03-27 17:56:04 +02:00
a5db02775e
fixup debug class definition: rename DFSK and DAUDIO to DDSP
2016-03-15 19:26:13 +01:00
57caa536cf
Implementation of NMT (Nordic Mobile Telephoe) network
2016-03-13 19:42:19 +01:00
cbfc818cce
Add compander to common part
2016-03-13 16:18:42 +01:00
4ab1cd5026
Add DTMF coder to common part
2016-03-13 13:38:35 +01:00
0dc81fe210
Prepare for NMT: Fixes and improvements at common code
2016-03-13 09:12:23 +01:00
d21be383a6
anetz/bnetz: Move option 'loss detection' from common code to individual code
2016-03-13 09:12:16 +01:00
946c9ce10a
initial git import
2016-03-13 09:12:11 +01:00
Andreas Eversberg