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  4. Coding of fine granular audio signals using High Resolution Envelope Processing (HREP)
 
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2017
Conference Paper
Title

Coding of fine granular audio signals using High Resolution Envelope Processing (HREP)

Abstract
High Resolution Envelope Processing (HREP) is a new tool for improved perceptual coding of audio signals that predominantly consist of many dense transient events, such as applause, rain drop sounds, etc. These signals have traditionally been very difficult to code for perceptual audio codecs, particularly at low bit rates. Based on the gain control principle, HREP acts as a pre-/post-processor pair to perceptual audio codecs and preserves the temporal fine structure and subjective quality of applause-like signals. Subjective tests have shown a significant improvement in audio quality of around 12 MUSHRA points by HREP processing at 48 kbps stereo when used together with an MPEG-H 3D Audio codec. The new coding tool has been adopted as part of MPEG-H 3D Audio Second Edition.
Author(s)
Ghido, Floran
Disch, Sascha  
Herre, Juergen
Reutelhuber, Frank
Adami, Alexander
ALabs-IIS
Mainwork
IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2017. Proceedings  
Conference
International Conference on Acoustics, Speech, and Signal Processing (ICASSP) 2017  
DOI
10.1109/ICASSP.2017.7952246
Language
English
Fraunhofer-Institut für Integrierte Schaltungen IIS  
Keyword(s)
  • Standards in der Audiocodierung

  • Spatial Audio Coding

  • MPEG-H 3D Audio

  • MPEG

  • Audio-Software

  • audio

  • aac codec

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