Uninformed: Informative Information for the Uninformed

Vol 8» 2007.Sep

Down-sampling and Normalization

Down-sampling and normalization may be performed on an audio payload to bring the properties of the audio such as volume and background white-noise more in line with the other party's audio stream. Occasionally this task is handled by the endpoint devices when playing the media for the user. In that scenario the integrity of the stego-medium will likely remain intact as the audio payload isn't actually modified in transit. However, there are scenarios where an intermediary media device may actually re-sample or otherwise modify the payload of the media stream specifically to alter its audible properties. In these cases, the integrity of the stego-medium may become compromised.