Perceptual Weighting to Improve Coding of Harmonic Signals

Nemer E, Fejzo Z, Thompson J. Perceptual Weighting to Improve Coding of Harmonic Signals. In: AES Convention 147. Audio Engineering Society; 2019. Paper 10262. Available from: https://aes.org/publications/elibrary-page/?id=20635

@inproceedings{Nemer2019_20635,
  author = {Nemer, Elias and Fejzo, Zoran and Thompson, Jeff},
  title = {{Perceptual Weighting to Improve Coding of Harmonic Signals}},
  booktitle = {AES Convention 147},
  note = {Paper 10262},
  year = {2019},
  month = oct,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=20635}
}

TY  - CPAPER
TI  - Perceptual Weighting to Improve Coding of Harmonic Signals
AU  - Nemer, Elias
AU  - Fejzo, Zoran
AU  - Thompson, Jeff
T2  - AES Convention 147
M1  - Paper 10262
PY  - 2019
DA  - 2019/10/06
UR  - https://aes.org/publications/elibrary-page/?id=20635
PB  - Audio Engineering Society
LA  - en
AB  - This paper describes a new approach to improving the coding of harmonic signals in transform-based audio codecs employing pulse vector quantization. The problem occurs when coding at low rate signals with varying levels of harmonics. As a result of vector quantization (VQ), some lower level harmonics may be missed or fluctuating and cause perceptual artifacts. The proposed solution consists of applying perceptual weighting to the computed synthesis error in the search loop of the VQ. The objective being to de-emphasize the error in the high tonal peaks where signal energy partially masks the quantization noise. Simulation results over mixed musical content showed a noticeable improvement in perceptual scores, particularly for highly harmonic signals.
ER  -