Implementing MPEG Advanced Audio Coding and Layer-3 Encoders on 32-bit and 16-bit Fixed-point Processors

Lohwasser M, Gayer M, Lutzky M. Implementing MPEG Advanced Audio Coding and Layer-3 Encoders on 32-bit and 16-bit Fixed-point Processors. In: AES Convention 115. Audio Engineering Society; 2003. Paper 5978. Available from: https://aes.org/publications/elibrary-page/?id=12419

@inproceedings{Lohwasser2003_12419,
  author = {Lohwasser, Markus and Gayer, Marc and Lutzky, Manfred},
  title = {{Implementing MPEG Advanced Audio Coding and Layer-3 Encoders on 32-bit and 16-bit Fixed-point Processors}},
  booktitle = {AES Convention 115},
  note = {Paper 5978},
  year = {2003},
  month = oct,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=12419}
}

TY  - CPAPER
TI  - Implementing MPEG Advanced Audio Coding and Layer-3 Encoders on 32-bit and 16-bit Fixed-point Processors
AU  - Lohwasser, Markus
AU  - Gayer, Marc
AU  - Lutzky, Manfred
T2  - AES Convention 115
M1  - Paper 5978
PY  - 2003
DA  - 2003/10/06
UR  - https://aes.org/publications/elibrary-page/?id=12419
PB  - Audio Engineering Society
LA  - en
AB  - Encoder implementations of MPEG Advanced Audio Coding and Layer-3 (mp3) on 32-bit or 16-bit fixed-point processors are challenging due to the fact that the usable word length is restricted to 32 bits if low processing power is required. This paper describes the modifications and optimizations that had to be applied to the algorithms of these audio encoders to make a true fixed-point implementation on a 32-bit or 16-bit device possible. The implementation had to be done without using floating-point emulations or even 64-bit values for the signal energies and thresholds in the psychoacoustic model of the encoder. At the same time high encoding quality and speed were required. Memory and processing power requirements on various platforms as well as results from a subjective listening test will be presented.
ER  -