kopia lustrzana https://github.com/windytan/slowrx
68 wiersze
2.6 KiB
Markdown
68 wiersze
2.6 KiB
Markdown
slowrx
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========
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Slowrx is an [SSTV](http://en.wikipedia.org/wiki/Slow-scan%20television) decoder that aims for intuitive simplicity and lack of features not needed by a shortwave listener (SWL).
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Created by Oona Räisänen OH2-250 (windyoona at gmail).
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[![endorse](http://api.coderwall.com/windytan/endorsecount.png)](http://coderwall.com/windytan)
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Screenshot
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----------
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![Screenshot](http://www.cs.helsinki.fi/u/okraisan/shot-slowrx.png)
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Features
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--------
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* Support for a multitude of modes (see `modespec.c` for a list)
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* Detect frequency-shifted signals – no need to fine-tune the radio
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* Automatic slant correction (compensation for sound card clock error)
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* Adaptive noise reduction
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* Decode digital FSK ID
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* Save received pictures as PNG
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* Written in C99
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Requirements
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------------
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* Linux
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* Alsa
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* Gtk+ 3.4
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* FFTW 3
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* pnglite
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And, obviously:
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* shortwave radio with SSB
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* computer with sound card
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* means of getting sound from one to the other
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References
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----------
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The program was inspired by several articles:
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* Barber, JL (N7CXI) (May 2000). ["Proposal for SSTV Mode Specifications"](http://www.barberdsp.com/files/Dayton%20Paper.pdf). Presented at the Dayton SSTV forum, 20 May 2000.
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* Cordesses L, Cordesses R (F2DC) (May 2003). ["Some thoughts on 'Real-Time' SSTV Processing"](http://lionel.cordesses.free.fr/gpages/Cordesses.pdf). *QEX* May/June 2003: 3–20.
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* Gasior M, Gonzalez J L (May 2004). ["Improving FFT Frequency Measurement Resolution by Parabolic and Gaussian Spectrum Interpolation"](http://cdsweb.cern.ch/record/738182/files/ab-2004-023.pdf). *AIP Conf. Proc.* (Geneva: CERN) **732** (2004): 276–285.
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* Jones, D (KB4YZ) (Feb 1998). ["List of SSTV Modes with VIS Codes"](http://www.tima.com/~djones/vis.txt).
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* Jones, D (KB4YZ) (May 1999). ["List of SSTV Modes with Line Timing"](http://www.tima.com/~djones/line.txt).
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Licensing
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---------
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Copyright (c) 2007-2012, windytan (OH2-250)
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Permission to use, copy, modify, and/or distribute this software for any
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purpose with or without fee is hereby granted, provided that the above
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copyright notice and this permission notice appear in all copies.
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THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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