Sound and Video

audiowmark - Audio watermarking tool

License: GPL-3.0-or-later
Vendor: Alcance Libre, Inc.
audiowmark is an Open Source (GPL) solution for audio watermarking.

A sound file is read by the software, and a 128-bit message is stored
in a watermark in the output sound file. For human listeners, the
files typically sound the same.

However, the 128-bit message can be retrieved from the output sound
file. Our tests show, that even if the file is converted to mp3 or
ogg (with bitrate 128 kbit/s or higher), the watermark usually can be
retrieved without problems. The process of retrieving the message does
not need the original audio file (blind decoding).

Internally, audiowmark is using the patchwork algorithm to hide the
data in the spectrum of the audio file. The signal is split into 1024
sample frames. For each frame, some pseoudo-randomly selected
amplitudes of the frequency bands of a 1024-value FFTs are increased
or decreased slightly, which can be detected later.


audiowmark-0.6.2-1.aldos.x86_64 [213 KiB] Changelog by Joel Barrios (2024-02-22):
- Update to 0.6.2.

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