Improved Psychoacoustic Noise Shaping for Requantization of High-Resolution Digital Audio

Helmrich CR, Holters M, Zölzer U. Improved Psychoacoustic Noise Shaping for Requantization of High-Resolution Digital Audio. In: AES Conference: 31st International Conference: New Directions in High Resolution Audio. Audio Engineering Society; 2007. Paper 27. Available from: https://aes.org/publications/elibrary-page/?id=13963

@inproceedings{Helmrich2007_13963,
  author = {Helmrich, Christian R. and Holters, Martin and Zölzer, Udo},
  title = {{Improved Psychoacoustic Noise Shaping for Requantization of High-Resolution Digital Audio}},
  booktitle = {AES Conference: 31st International Conference: New Directions in High Resolution Audio},
  note = {Paper 27},
  year = {2007},
  month = jun,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=13963}
}

TY  - CPAPER
TI  - Improved Psychoacoustic Noise Shaping for Requantization of High-Resolution Digital Audio
AU  - Helmrich, Christian R.
AU  - Holters, Martin
AU  - Zölzer, Udo
T2  - AES Conference: 31st International Conference: New Directions in High Resolution Audio
M1  - Paper 27
PY  - 2007
DA  - 2007/06/06
UR  - https://aes.org/publications/elibrary-page/?id=13963
PB  - Audio Engineering Society
LA  - en
AB  - Considering high-resolution, multi-channel audio, it is worth re-examining the concept of psychoacoustically optimized noise shaping to ensure that signal quality is preserved when word-lengths are reduced. In this paper, approaches in static (time-invariant) and signal-adaptive (time-variant) noise shaping are discussed. We identify problems occurring when equal-loudness level contours such as the inverse F-weighting curve are used as a model for noise shaping. As a remedy, we present two alternative time-invariant filter designs. Regarding adaptive requantization, we introduce a noise shaper based on work by Verhelst and De Koning with an improved design of the time-variant filter. The paper concludes with a comparative evaluation based on listening tests with different transducers.
ER  -