A2DP Volume vs Shredpix - Encode COFDMTV
Side-by-side comparison of two open source alternatives
A2DP Volume
Automatically adjusts the media volume on connect and resets it on disconnect. This is done so that stereo streaming audio can work properly. Intended primarily for car Bluetooth systems. It can read out text messages using Text To Speech (TTS) services while you are connected. Each paired Bluetooth device or virtual device (home dock, car dock, power connection, or headset plug) can be configured to your liking. There is a manual on the website. A secondary feature is the ability to capture location information so you can find where you left your car. The location can also be automatically captured when exiting Car Mode on your Android device and read by any app that understands GPS data.
Shredpix - Encode COFDMTV
*Shredpix* converts images to COFDMTV encoded audio signals and is based on open-source software.COFDMTV is based on COFDM (coded orthogonal frequency-division multiplexing) technology:- 160 ms long OFDM symbols- 6.25 Hz per sub-carrier- 1/8 guard interval- differentially encoded PSK (phase-shift keying) modulation- systematic polar codes for forward error correctionFollowing modes are supported:Using SPC(64800, 43072):Mode 6: 8PSK, 2700 Hz BW and about 10 seconds longMode 7: 8PSK, 2500 Hz BW and about 11 seconds longMode 8: QPSK, 2500 Hz BW and about 16 seconds longMode 9: QPSK, 2250 Hz BW and about 18 seconds longUsing SPC(64512, 43072):Mode 10: 8PSK, 3200 Hz BW and about 9 seconds longMode 11: 8PSK, 2400 Hz BW and about 11 seconds longMode 12: QPSK, 2400 Hz BW and about 16 seconds longMode 13: QPSK, 1600 Hz BW and about 24 seconds longPayload must be smaller or equal to 5380 bytes.JPEG, PNG and WebP image formats are supported.Width and height are limited to between 16 and 1024 pixels.
| Feature | A2DP Volume | Shredpix - Encode COFDMTV |
|---|---|---|
| License | GPL-3.0-only | 0BSD |
| Install sources | F-DroidGitHub | GitHubIzzyOnDroid |
| Categories | Media PlayerVideo | Media PlayerVideo |
| Features | Ad-FreeOpen SourceNo Tracking | Ad-FreeOpen SourceNo Tracking |
| Platforms | Android | Android |
| Website | ||
| Source code |