Quantization of 2D Higher Order Ambisonics

Hellerud E, Solvang A, Svensson UP. Quantization of 2D Higher Order Ambisonics. In: AES Convention 124. Audio Engineering Society; 2008. Paper 7370. Available from: https://aes.org/publications/elibrary-page/?id=14500

@inproceedings{Hellerud2008_14500,
  author = {Hellerud, Erik and Solvang, Audun and Svensson, U. Peter},
  title = {{Quantization of 2D Higher Order Ambisonics}},
  booktitle = {AES Convention 124},
  note = {Paper 7370},
  year = {2008},
  month = may,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=14500}
}

TY  - CPAPER
TI  - Quantization of 2D Higher Order Ambisonics
AU  - Hellerud, Erik
AU  - Solvang, Audun
AU  - Svensson, U. Peter
T2  - AES Convention 124
M1  - Paper 7370
PY  - 2008
DA  - 2008/05/06
UR  - https://aes.org/publications/elibrary-page/?id=14500
PB  - Audio Engineering Society
LA  - en
AB  - The spatial distribution of the quantization noise for a 2-D Higher Order Ambisonics (HOA) signal is inves- tigated analytically. Uniformly distributed loudspeakers radiating plane waves in a non reverberant environ- ment and frequency domain quantization are presumed. It is found that employing the same quantization interval for all orders leads to uniformly distributed quantization noise in space. Assigning a larger quanti- zation interval (i.e. fewer bits) to higher orders leads to a radially increasing quantization noise. Matching the quantization error to the reproduction error at the near perfect reconstruction boundary suggests that as little as four bits per sample can be used for quantization. Furthermore, high-pass ¯ltering the HOA components opens up for employing as little as three bits per sample. This quantization strategy seems very promising for reducing the rate of HOA.
ER  -