Corpus ID: 15238928

Minimally Audible Noise Shaping

@article{Lipshitz1991MinimallyAN,
  title={Minimally Audible Noise Shaping},
  author={Stanley P. Lipshitz and John Vanderkooy and Robert A. Wannamaker},
  journal={Journal of The Audio Engineering Society},
  year={1991},
  volume={39},
  pages={836-852}
}
Normal quantization or requantization noise is white, but the ear's sensitivity to low-level broad-band noise is not uniform with frequency. By adopting a suitable weighting curve to represent low-level noise audibility, one can design dithered requantizing noise shapers to approximate the inverse of the audibility curve and hence achieve the least audible noise penalty. If Fielder's modified E-weighting curve is adopted as a model of the 15-phon audibility curve, a reduction of 10.9 dB in… Expand
Improvement in design of noise shaping filters
Addition of dither before the quantization (or requantization) linearizes the quantization characteristic for signals of low levels. However, the dither addition increases overall noise, which isExpand
Least Squares Theory and Design of Optimal Noise Shaping Filters
TLDR
A new theory for optimal noise shaping of audio signals, based on a Least Squares interpretation of the problem, is presented, which provides a shorter and more straightforward proof of known properties of dithered and non-dithered noise shaping. Expand
Verhelst and De Koning Least Squares Noise Shaping LEAST SQUARES THEORY AND DESIGN OF OPTIMAL NOISE SHAPING FILTERS
Signal requantization to reduce the word-length of an audio stream introduces distortions. Noise shaping can be applied in combination with a psychoacoustic model in order to make requantizationExpand
Noise shaping filter design for minimally audible signal requantization
  • W. Verhelst, D. De Koning
  • Mathematics
  • Proceedings of the 2001 IEEE Workshop on the Applications of Signal Processing to Audio and Acoustics (Cat. No.01TH8575)
  • 2001
Signal requantization to reduce the word-length of an audio stream introduces distortions. Noise shaping can be applied in combination with a psychoacoustic model in order to make requantizationExpand
Design and Implementation of Optimal Noise Shaping Filters
When re-quantize a signal of low levels, serious distortion may occur due to word length reduction. Adding proper dither before re-quantization can improve the quantization error characteristic,Expand
On psychoacoustic noise shaping for audio requantization
  • D. D. Koning, W. Verhelst
  • Computer Science
  • 2003 IEEE International Conference on Acoustics, Speech, and Signal Processing, 2003. Proceedings. (ICASSP '03).
  • 2003
TLDR
A least squares theory for optimal noise shaping of audio signals is presented, which provides a shorter and more straightforward proof of known properties, and in contrast with the standard theory, does show how noise shaping filters that attain the theoretical optimum can be designed in practice. Expand
On psychoacoustic noise shaping for audio requantization
  • D. D. Koning, W. Verhelst
  • Mathematics, Computer Science
  • 2003 International Conference on Multimedia and Expo. ICME '03. Proceedings (Cat. No.03TH8698)
  • 2003
TLDR
A least squares theory for optimal noise shaping of audio signals provides shorter and more straightforward proof of known properties, and in contrast with the standard theory, it does show how noise shaping filters that attain the theoretical optimum can be designed in practice. Expand
Psychoacoustically Optimal Sigma-Delta Modulation
A psychoacoustically optimal sigma-delta modulator (SDM) possesses a noise floor with a power spectral density that is invariant with input signal characteristics, and which is also minimallyExpand
Filter design for psychoacoustical in-band noise shapers
  • J. Hahn
  • Computer Science
  • New Trends in Audio and Video / Signal Processing Algorithms, Architectures, Arrangements, and Applications SPA 2008
  • 2008
TLDR
New approaches to design static noise shaping filters are presented that take advantage of considering filter design as a (semi-infinite) optimization problem and overcome problems of existing design approaches. Expand
Advances on calculating effective dither for audio signals
Dithering represents a well-established, attractive technique for minimizing the audibility of the error produced during requantization of digital audio signals. However, it is also known that, asExpand
...
1
2
3
4
5
...

References

SHOWING 1-6 OF 6 REFERENCES
Engineering Society Another side benefit of noise-shaped rounding vol
  • preprint 2412. schemes is the increased smoothing of DAC
  • 1986
Digital (and, of course, also to require a separate noise-shaper Dither," presented at the 81 st Convention of the Audio spectral optimization
  • Digital (and, of course, also to require a separate noise-shaper Dither," presented at the 81 st Convention of the Audio spectral optimization
Psycho-Acoustically
  • Psycho-Acoustically
powers above 10 kHz significantly upon playback
  • powers above 10 kHz significantly upon playback
the dips"), .and will introduce some measure of noise
  • the dips"), .and will introduce some measure of noise