ARLA/CLUSTER: Ham radio Digital Voice plus Video on HF

[João Costa > CT1FBF]

*FreeDV plus Video* adds a new dimension - video conferencing - to amateur
radio operation on HF. Imagine a QSO where you're able to listen to and see
the other operator!


Here's a recording from the receiving station's screen while receiving
audio and video from amateur station WA6NUT. The recording shows the Video
RX PC screen, with the RXfftDIFF7K and WinWarbler applications running.
Note the "live" video from WA6NUT, displayed at 1 frame/sec, on the
RXfftDIFF7K GUI. The audio is the FreeDV signal received from WA6NUT,
decoded by the FreeDV application running on the Video TX/FreeDV PC.

The WinWarbler waterfall AFC is tracking one of the 64 subcarriers
(nominally 2.100 kHz) displayed as a yellow trace. The operator of the
receiving station tunes his receiver to maintain a 2.100 kHz reading on the
WinWarbler AFC readout, compensating for frequency drift in the local
receiver and the other station's transmitter.

The signal level from the receiver to the RXfftDIFF7K and WinWarbler
applications is set by the Record Microphone Level slider control.

The applications in the FreeDV+ suite run in the Windows operating system
(the recording shows the software running in Windows Vista).

Watch FreeDV+ Video RX


https://youtu.be/AEO9qcg3eyk

See the "FreeDV+ Video TX" video for the receiving station's Video
TX/FreeDV PC screen at: http://youtu.be/Ms0Ea4Ewghc

For more on FreeDV plus Video see
http://www.qsl.net/wa6nut/FreeDVplusVideo
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