Intelligent Gap Filling in Perceptual Transform Coding of Audio

Disch S, Niedermeier A, Helmrich C, Neukam C, Schmidt K, Geiger R, Lecomte J, Ghido F, Nagel F, Edler B (2016)

Publication Type: Conference contribution

Publication year: 2016

Conference Proceedings Title: 141th AES Convention

Event location: Los Angeles

Abstract

Intelligent Gap Filling (IGF) denotes a semi-parametric coding technique within modern codecs like MPEG-H-3D-Audio or the 3gpp-EVS-codec. IGF can be applied to fill spectral holes introduced by the quantization process in the encoder due to low-bitrate constraints. Typically, if the limited bit budget does not allow for transparent coding, spectral holes emerge in the high-frequency (HF) region of the signal first and increasingly affect the entire upper spectral range for lowest bitrates. At the decoder side, such spectral holes are substituted via IGF using synthetic HF content generated out of low-frequency (LF) content, and post-processing controlled by additional parametric side information. This paper provides an overview of the principles and functionalities of IGF and presents listening test data assessing the perceptual quality of IGF coded audio material.

Authors with CRIS profile

Involved external institutions

Fraunhofer-Institut für Integrierte Schaltungen (IIS) Germany (DE)

How to cite

APA:

Disch, S., Niedermeier, A., Helmrich, C., Neukam, C., Schmidt, K., Geiger, R.,... Edler, B. (2016). Intelligent Gap Filling in Perceptual Transform Coding of Audio. In 141th AES Convention. Los Angeles.

MLA:

Disch, Sascha, et al. "Intelligent Gap Filling in Perceptual Transform Coding of Audio." Proceedings of the 141th AES Convention, Los Angeles 2016.

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