Fast Complex Quadrature Mirror Filterbanks for MPEG-4 HE-AAC

Hsu HW, Lee WC, Liu CM. Fast Complex Quadrature Mirror Filterbanks for MPEG-4 HE-AAC. In: AES Convention 121. Audio Engineering Society; 2006. Paper 6871. Available from: https://aes.org/publications/elibrary-page/?id=13705

@inproceedings{Hsu2006_13705,
  author = {Hsu, Han-Wen and Lee, Wen-Chieh and Liu, Chi-Min},
  title = {{Fast Complex Quadrature Mirror Filterbanks for MPEG-4 HE-AAC}},
  booktitle = {AES Convention 121},
  note = {Paper 6871},
  year = {2006},
  month = oct,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=13705}
}

TY  - CPAPER
TI  - Fast Complex Quadrature Mirror Filterbanks for MPEG-4 HE-AAC
AU  - Hsu, Han-Wen
AU  - Lee, Wen-Chieh
AU  - Liu, Chi-Min
T2  - AES Convention 121
M1  - Paper 6871
PY  - 2006
DA  - 2006/10/06
UR  - https://aes.org/publications/elibrary-page/?id=13705
PB  - Audio Engineering Society
LA  - en
AB  - Spectral Band Replication (SBR) has been introduced in MPEG-4 HE-AAC as bandwidth extension tool. All the framework of SBR is on complex-value domain to avoid the aliasing effect, and hence results in considerable time complexity. This paper focuses on the complex Quadrature Mirror Filter (QMF) banks used in HE-AAC encoder and decoder, and proposes the two fast decomposition methods for the time-consuming matrix operations in the filterbanks, that are based on DCT and DFT respectively. Hence, the time complexity can be effectively reduced by the fast algorithms for DCT and FFT.
ER  -