TY - GEN
T1 - Detection of ENF discontinuities using PLL for audio authenticity
AU - Fuentes, Magdalena
AU - Zinemanas, Pablo
AU - Cancela, Pablo
AU - Apolinário, José Antonio
N1 - Publisher Copyright:
© 2016 IEEE.
PY - 2016/4/11
Y1 - 2016/4/11
N2 - 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%).
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%).
KW - Audio authenticity
KW - Electric Network Frequency (ENF)
KW - Phase-Locked Loop (PLL)
UR - http://www.scopus.com/inward/record.url?scp=84982839178&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84982839178&partnerID=8YFLogxK
U2 - 10.1109/LASCAS.2016.7451014
DO - 10.1109/LASCAS.2016.7451014
M3 - Conference contribution
AN - SCOPUS:84982839178
T3 - LASCAS 2016 - 7th IEEE Latin American Symposium on Circuits and Systems, R9 IEEE CASS Flagship Conference
SP - 79
EP - 82
BT - LASCAS 2016 - 7th IEEE Latin American Symposium on Circuits and Systems, R9 IEEE CASS Flagship Conference
A2 - Andreou, Andreas G.
A2 - Julian, Pedro
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 7th IEEE Latin American Symposium on Circuits and Systems, LASCAS 2016
Y2 - 27 February 2016 through 1 March 2016
ER -