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JBE, vol. 26, no. 3, pp.327-330, May, 2021

DOI: https://doi.org/10.5909/JBE.2021.26.3.327

A 3D Audio Codec Employing a Revised Noise Filling Method

Rin Chul Kim

C.A E-mail: rin@uos.ac.kr

Abstract:

In this paper, a new noise filling method is proposed for improving the performance of the 3D audio codec. In the new method, the core band is limited up to MAX_SFB, not up to the IGF start frequency. And the noise filling is applied to all frequency range of the IGF source patches. We conduct the MUSHRA test and find that the proposed noise filling method demonstrates better performance than the conventional method.

 



Keyword: 3D audio coding, noise filling, intelligent gap filling

Reference:
[1] ISO/IEC FDIS 23008-3:2019(E), Information Technology – High Ef- ficiency Coding and Media Delivery in Heterogeneous Environments – Part 3: 3D Audio, 2019.
[2] N. Rettelbach, et al., “Audio Encoder, Audio Decoder, Methods for Encoding and Decoding an Audio Signal, and a Computer Program,” US Patent 9449606 B2, Fraunhoffer-Gesellschaft, 2016.
[3] S. Disch, et al., “Noise Filling in Perceptual Transform Audio Coding,” WO Patent 2014/118176 A1, Fraunhoffer-Gesellschaft, 2014.
[4] S. Disch, et al., “Intelligent Gap Filling in Perceptual Transform Coding of Audio,” 141th AES Convention, LA, USA, Paper 9661, Sept. 2016.
[5] Rin Chul Kim “A 3D Audio Core-Codec Employing an Improved Buffer Control Method” JBE Vol. 25, No. 2, pp 233-241, March 2020.
[6] ITU-R BS.1534-1, Method for the Subjective Assessment of Interme- diate Sound Quality(MUSHRA), 2011.

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