In This Section
Clean Audio for TV broadcast: An Object-Based Approach for Hearing-Impaired Viewers - April 2015
Audibility of a CD-Standard A/DA/A Loop Inserted into High-Resolution Audio Playback - September 2007
Sound Board: Food for Thought, Aesthetics in Orchestra Recording - April 2015
AES Convention Papers Forum
Advances in ENF Database Configuration for Forensic Authentication of Digital Media
When building an Electric Network Frequency (ENF) database for forensic purposes, ensuring that the recorded signal satisfies standards for forensic analysis is crucial. The ENF signal shall be free of clipping and lossy compression distortions, the signal to noise ratio shall be as high as possible, and the acquisition system clock shall be synchronized with an atomic clock. Using an ENF database to compare reference and questioned ENF involves precise measurements of amplitude, spectrum, and zero-crossings in order to accurately time-stamp, discover potential edits, and authenticate digital audio/video recordings. Due to the inherent differences in electronic components, building multiple ENF probes to create multiple databases with matching waveforms can be challenging. This paper addresses that challenge and offers a solution by using MathWorks MATLAB to calculate the best combination of components and produce graphical displays to help give a visual aid to the outcome in order to build a high quality ENF probe. This paper also addresses the challenge of establishing a fail-safe database to safely store the accurately acquired ENF information. This paper concludes that a reliable ENF database is mandatory for both scientific research and for forensic examination.
No AES members have commented on this paper yet.
Subscribe to this discussion
Start a discussion!
If you are not yet an AES member and have something important to say about this paper then we urge you to join the AES today and make your voice heard. You can join online today by clicking here.