Device-Specific Distortion Observed in Portable Devices Available for Recording Device Identification

Nishimura A. Device-Specific Distortion Observed in Portable Devices Available for Recording Device Identification. In: AES Convention 144. Audio Engineering Society; 2018. Paper 9955. Available from: https://aes.org/publications/elibrary-page/?id=19472

@inproceedings{Nishimura2018_19472,
  author = {Nishimura, Akira},
  title = {{Device-Specific Distortion Observed in Portable Devices Available for Recording Device Identification}},
  booktitle = {AES Convention 144},
  note = {Paper 9955},
  year = {2018},
  month = may,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=19472}
}

TY  - CPAPER
TI  - Device-Specific Distortion Observed in Portable Devices Available for Recording Device Identification
AU  - Nishimura, Akira
T2  - AES Convention 144
M1  - Paper 9955
PY  - 2018
DA  - 2018/05/06
UR  - https://aes.org/publications/elibrary-page/?id=19472
PB  - Audio Engineering Society
LA  - en
AB  - This study addresses device-specific distortion observed in recorded audio, to identify a built-in system-on-a-chip (SoC) in a portable device. A swept sinusoidal signal is emitted from a loudspeaker and is recorded by the portable device used in this study. The three types of distortion observed by spectral analysis of the recorded signals are the folded components at frequencies symmetrical across 4 kHz and 8 kHz of the signal component, non-harmonic and non-subharmonic distortion components whose frequencies are 4 kHz below and multiples of 4 kHz above the signal frequency, and mixed non-subharmonics and folded components in the low-frequency region. They are also observed using the correlation matrix on temporal amplitude variations among frequencies derived from the recorded speech signals.
ER  -