Detection of ENF discontinuities using PLL for audio authenticity

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

doi:10.1109/LASCAS.2016.7451014

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 proceeding › Conference 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 language	English (US)
Title of host publication	LASCAS 2016 - 7th IEEE Latin American Symposium on Circuits and Systems, R9 IEEE CASS Flagship Conference
Editors	Andreas G. Andreou, Pedro Julian
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	79-82
Number of pages	4
ISBN (Electronic)	9781467378352
DOIs	https://doi.org/10.1109/LASCAS.2016.7451014
State	Published - Apr 11 2016
Event	7th IEEE Latin American Symposium on Circuits and Systems, LASCAS 2016 - Florianopolis, Brazil Duration: Feb 27 2016 → Mar 1 2016

Publication series

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

Conference

Conference	7th IEEE Latin American Symposium on Circuits and Systems, LASCAS 2016
Country/Territory	Brazil
City	Florianopolis
Period	2/27/16 → 3/1/16

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

Access to Document

10.1109/LASCAS.2016.7451014

Cite this

Fuentes, M., Zinemanas, P., Cancela, P., & Apolinário, J. A. (2016). Detection of ENF discontinuities using PLL for audio authenticity. In A. G. Andreou, & P. Julian (Eds.), LASCAS 2016 - 7th IEEE Latin American Symposium on Circuits and Systems, R9 IEEE CASS Flagship Conference (pp. 79-82). Article 7451014 (LASCAS 2016 - 7th IEEE Latin American Symposium on Circuits and Systems, R9 IEEE CASS Flagship Conference). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/LASCAS.2016.7451014

Detection of ENF discontinuities using PLL for audio authenticity. / Fuentes, Magdalena; Zinemanas, Pablo; Cancela, Pablo et al.
LASCAS 2016 - 7th IEEE Latin American Symposium on Circuits and Systems, R9 IEEE CASS Flagship Conference. ed. / Andreas G. Andreou; Pedro Julian. Institute of Electrical and Electronics Engineers Inc., 2016. p. 79-82 7451014 (LASCAS 2016 - 7th IEEE Latin American Symposium on Circuits and Systems, R9 IEEE CASS Flagship Conference).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Fuentes, M, Zinemanas, P, Cancela, P & Apolinário, JA 2016, Detection of ENF discontinuities using PLL for audio authenticity. in AG Andreou & P Julian (eds), LASCAS 2016 - 7th IEEE Latin American Symposium on Circuits and Systems, R9 IEEE CASS Flagship Conference., 7451014, LASCAS 2016 - 7th IEEE Latin American Symposium on Circuits and Systems, R9 IEEE CASS Flagship Conference, Institute of Electrical and Electronics Engineers Inc., pp. 79-82, 7th IEEE Latin American Symposium on Circuits and Systems, LASCAS 2016, Florianopolis, Brazil, 2/27/16. https://doi.org/10.1109/LASCAS.2016.7451014

Fuentes M, Zinemanas P, Cancela P, Apolinário JA. Detection of ENF discontinuities using PLL for audio authenticity. In Andreou AG, Julian P, editors, LASCAS 2016 - 7th IEEE Latin American Symposium on Circuits and Systems, R9 IEEE CASS Flagship Conference. Institute of Electrical and Electronics Engineers Inc. 2016. p. 79-82. 7451014. (LASCAS 2016 - 7th IEEE Latin American Symposium on Circuits and Systems, R9 IEEE CASS Flagship Conference). doi: 10.1109/LASCAS.2016.7451014

Fuentes, Magdalena ; Zinemanas, Pablo ; Cancela, Pablo et al. / Detection of ENF discontinuities using PLL for audio authenticity. LASCAS 2016 - 7th IEEE Latin American Symposium on Circuits and Systems, R9 IEEE CASS Flagship Conference. editor / Andreas G. Andreou ; Pedro Julian. Institute of Electrical and Electronics Engineers Inc., 2016. pp. 79-82 (LASCAS 2016 - 7th IEEE Latin American Symposium on Circuits and Systems, R9 IEEE CASS Flagship Conference).

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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%).",

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AB - 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%).

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Detection of ENF discontinuities using PLL for audio authenticity

Abstract

Publication series

Conference

Keywords

ASJC Scopus subject areas

Access to Document

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