Detection of ENF discontinuities using PLL for audio authenticity

Magdalena Fuentes, Pablo Zinemanas, Pablo Cancela, José Antonio Apolinário

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A Phase Locked Loop (PLL) based method for determining audio authenticity is proposed in this work. Assuming that the power grid signal is embedded in an audio signal, certain pre-processing techniques are applied in order to obtain the Electrical Network Frequency (ENF). A PLL is then used to estimate the time-varying phase of the ENF signal. Postprocessing is carried out so as to improve system performance. Finally, an automatic decision on the authenticity of the audio is conducted by quantifying the frequency variations of the VCO output. The performance of the proposed method is evaluated on digitally edited and original audio signals, with promising results (achieving an accuracy of 96%).

Original languageEnglish (US)
Title of host publicationLASCAS 2016 - 7th IEEE Latin American Symposium on Circuits and Systems, R9 IEEE CASS Flagship Conference
EditorsAndreas G. Andreou, Pedro Julian
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages79-82
Number of pages4
ISBN (Electronic)9781467378352
DOIs
StatePublished - Apr 11 2016
Event7th IEEE Latin American Symposium on Circuits and Systems, LASCAS 2016 - Florianopolis, Brazil
Duration: Feb 27 2016Mar 1 2016

Publication series

NameLASCAS 2016 - 7th IEEE Latin American Symposium on Circuits and Systems, R9 IEEE CASS Flagship Conference

Conference

Conference7th IEEE Latin American Symposium on Circuits and Systems, LASCAS 2016
Country/TerritoryBrazil
CityFlorianopolis
Period2/27/163/1/16

Keywords

  • Audio authenticity
  • Electric Network Frequency (ENF)
  • Phase-Locked Loop (PLL)

ASJC Scopus subject areas

  • Hardware and Architecture
  • Electrical and Electronic Engineering
  • Control and Systems Engineering

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