Selecting an Optimal Huffman Decoder for AAC

Mesarovic VZ, Rao R, Dokic MV, Deo S. Selecting an Optimal Huffman Decoder for AAC. In: AES Convention 111. Audio Engineering Society; 2001. Paper 5436. Available from: https://aes.org/publications/elibrary-page/?id=9828

@inproceedings{Mesarovic2001_9828,
  author = {Mesarovic, Vladimir Z. and Rao, Raghunath and Dokic, Miroslav V. and Deo, Sachin},
  title = {{Selecting an Optimal Huffman Decoder for AAC}},
  booktitle = {AES Convention 111},
  note = {Paper 5436},
  year = {2001},
  month = nov,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=9828}
}

TY  - CPAPER
TI  - Selecting an Optimal Huffman Decoder for AAC
AU  - Mesarovic, Vladimir Z.
AU  - Rao, Raghunath
AU  - Dokic, Miroslav V.
AU  - Deo, Sachin
T2  - AES Convention 111
M1  - Paper 5436
PY  - 2001
DA  - 2001/11/06
UR  - https://aes.org/publications/elibrary-page/?id=9828
PB  - Audio Engineering Society
LA  - en
AB  - In today's competitive consumer audio market the Advanced Audio Coding (AAC) format has quickly become a must-have technology with its adoption on the Internet, in digital radio, digital television and home theatre. Compression using AAC retains high audio quality even at low bit rates. One reason for this effectiveness is the use of Huffman variable length coding to represent frequency domain information. However, this requires to perform the relatively complex task of Huffman decoding in the audio decoder, which is typically very sensitive to cost and processor speed requirements. Furthermore, encoders can sometimes create worst-case scenarios consisting of very long code words, even when unnecessary. Thus, one needs to optimize the Huffman decoding for these worst-case scenarios without giving up average performance. This paper discusses various methods for Huffman decoding, their inherent implementation tradeoffs on a DSP platform and proposes improvements that are specific to the Huffman codebooks used in AAC.
ER  -