Robust MPEG-4 High-Efficiency AAC With Fixed- and Variable-Length Soft-Decision Decoding

Han S, Fingscheidt T. Robust MPEG-4 High-Efficiency AAC With Fixed- and Variable-Length Soft-Decision Decoding. In: AES Convention 139. Audio Engineering Society; 2015.pp. 9399:1-. Available from: https://aes.org/publications/elibrary-page/?id=17956

@inproceedings{Han2015_17956,
  author = {Han, Sai and Fingscheidt, Tim},
  title = {{Robust MPEG-4 High-Efficiency AAC With Fixed- and Variable-Length Soft-Decision Decoding}},
  booktitle = {AES Convention 139},
  pages = {9399:1-},
  year = {2015},
  month = oct,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=17956}
}

TY  - CPAPER
TI  - Robust MPEG-4 High-Efficiency AAC With Fixed- and Variable-Length Soft-Decision Decoding
AU  - Han, Sai
AU  - Fingscheidt, Tim
T2  - AES Convention 139
SP  - 1
M1  - Paper 9399
PY  - 2015
DA  - 2015/10/06
UR  - https://aes.org/publications/elibrary-page/?id=17956
PB  - Audio Engineering Society
LA  - en
AB  - MPEG-4 High-Efficiency advanced audio coding (HE-AAC) is optimized for low bit rate applications, such as digital radio broadcasting and wireless music streaming. In HE-AAC, the differential scale factors and quantized spectral coefficients are variable-length coded (VLC) by Huffman codes. The common reference value of the scale factors is a fixed-length coded global gain. Due to the error propagation in VLCs, a robust source decoder is desired for HE-AAC transmission over an error-prone channel. Unlike traditional hard-decision decoding or error concealment, soft-decision decoding utilizing bit-wise channel reliability information offers improved audio quality. In this work we apply soft-decision decoding of fixed length to the global gain and of variable length to the scale factors. Simulation results show a clearly improved performance.
ER  -