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Roman Zeyde
2014-08-02 07:37:11 +03:00
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README.md
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@@ -1,4 +1,4 @@
# Audio Modem for Uni-Directional Communication # Audio Modem Communication Library
This program can be used to transmit a specified file between 2 computers, using This program can be used to transmit a specified file between 2 computers, using
a simple audio cable (for better SNR and higher speeds) or a simple headset, a simple audio cable (for better SNR and higher speeds) or a simple headset,
@@ -40,16 +40,21 @@ For graphs and visualization (optional), install:
## Calibration ## Calibration
Connect the audio cable between the sender and the receiver, and run the Connect the audio cable between the sender and the receiver, and run the
following script on both of them. following scripts:
- On the sender's side:
``` ```
$ ./calib.py send # run on the sender side ~/sender/amodem $ ./calib.py send
$ ./calib.py recv # run on the receiver side
``` ```
The sender computer's audio level should be increased, until the received - On the receiver's side:
**amplitude** and **peak** values are not higher than 0.5, while the ```
**coherence** is 1.0 (to avoid saturation). ~/receiver/amodem $ ./calib.py recv
```
The sender computer's output audio level should be increased, until the
received **amplitude** and **peak** values are not higher than 0.5, while
the **coherence** is 1.0 (to avoid saturation).
See http://youtu.be/iCg1tepGz10 for calibration demo. See http://youtu.be/iCg1tepGz10 for calibration demo.