A Robust and Efficient Implementation of MPEG-2/4 AAC Natural Audio Coders

Duenas A, Perez R, Rivas B, Alexandre E, Pena A. A Robust and Efficient Implementation of MPEG-2/4 AAC Natural Audio Coders. In: AES Convention 112. Audio Engineering Society; 2002. Paper 5556. Available from: https://aes.org/publications/elibrary-page/?id=11390

@inproceedings{Duenas2002_11390,
  author = {Duenas, Alberto and Perez, Rafael and Rivas, Begona and Alexandre, Enrique and Pena, Antonio},
  title = {{A Robust and Efficient Implementation of MPEG-2/4 AAC Natural Audio Coders}},
  booktitle = {AES Convention 112},
  note = {Paper 5556},
  year = {2002},
  month = apr,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=11390}
}

TY  - CPAPER
TI  - A Robust and Efficient Implementation of MPEG-2/4 AAC Natural Audio Coders
AU  - Duenas, Alberto
AU  - Perez, Rafael
AU  - Rivas, Begona
AU  - Alexandre, Enrique
AU  - Pena, Antonio
T2  - AES Convention 112
M1  - Paper 5556
PY  - 2002
DA  - 2002/04/06
UR  - https://aes.org/publications/elibrary-page/?id=11390
PB  - Audio Engineering Society
LA  - en
AB  - This paper discusses a new DSP based real-time implementation of the MPEG-2/4 AAC standards using a set of non-optimal solutions to reduce the computational load. These solutions comprise a novel implementation of a MDCT-based psychoacoustic model, managing a birth/death scheme which aims to overcome false power spectrum estimates due to the cosine transform, a smoothing of the scalefactors guided by an estimation of the increment in the quantization noise and a loop-free bit allocation method based on an overestimation of the noise level. These techniques provide both robustness and efficiency to the scheme. Other fixed-point DSP programming considerations required to achieve the real-time implementation, including a choice of a MDCT fast algorithm, are presented.
ER  -