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In perceptual audio coding using very low bitrates, modulation artifacts can be introduced onto tonal signal components, which are often perceived as auditory roughness. These artifacts may occur for instance due to quantization errors or may be added when using an audio bandwidth extension, which sometimes causes an irregular harmonic structure at the borders of replicated bands. Especially, the roughness artifacts due to quantization errors are difficult to mitigate without investing considerably more bits in encoding of tonal components. We propose a novel technique to remove these roughness artifacts at the decoder side controlled by a small amount of guidance information transmitted by the encoder.
Author (s): van de Par, Steven; Disch, Sascha; Niedermeier, Andreas; Edler, Bernd
Affiliation:
Fraunhofer IIS, Erlangen, Germany; University of Oldenburg, Oldenburg, Germany; International Audio Laboratories Erlangen, Erlangen, Germany; Fraunhofer HSA, Oldenburg, Germany
(See document for exact affiliation information.)
AES Convention: 151
Paper Number:10534
Publication Date:
2021-10-06
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Session subject:
Audio Signal Processing
Permalink: https://aes2.org/publications/elibrary-page/?id=21498
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van de Par, Steven; Disch, Sascha; Niedermeier, Andreas; Edler, Bernd; 2021; Informed postprocessing for auditory roughness removal for low-bitrate audio coders [PDF]; Fraunhofer IIS, Erlangen, Germany; University of Oldenburg, Oldenburg, Germany; International Audio Laboratories Erlangen, Erlangen, Germany; Fraunhofer HSA, Oldenburg, Germany; Paper 10534; Available from: https://aes2.org/publications/elibrary-page/?id=21498
van de Par, Steven; Disch, Sascha; Niedermeier, Andreas; Edler, Bernd; Informed postprocessing for auditory roughness removal for low-bitrate audio coders [PDF]; Fraunhofer IIS, Erlangen, Germany; University of Oldenburg, Oldenburg, Germany; International Audio Laboratories Erlangen, Erlangen, Germany; Fraunhofer HSA, Oldenburg, Germany; Paper 10534; 2021 Available: https://aes2.org/publications/elibrary-page/?id=21498
@article{van2021informed,
author={van de par steven and disch sascha and niedermeier andreas and edler bernd},
journal={journal of the audio engineering society},
title={informed postprocessing for auditory roughness removal for low-bitrate audio coders},
year={2021},
number={10534},
month={october},}