Novel Decimation-Whitening Filter in Spectral Band Replication

Hsu HW, Liu CM. Novel Decimation-Whitening Filter in Spectral Band Replication. In: AES Convention 132. Audio Engineering Society; 2012. Paper 8653. Available from: https://aes.org/publications/elibrary-page/?id=16291

@inproceedings{Hsu2012_16291,
  author = {Hsu, Han-Wen and Liu, Chi-Min},
  title = {{Novel Decimation-Whitening Filter in Spectral Band Replication}},
  booktitle = {AES Convention 132},
  note = {Paper 8653},
  year = {2012},
  month = apr,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=16291}
}

TY  - CPAPER
TI  - Novel Decimation-Whitening Filter in Spectral Band Replication
AU  - Hsu, Han-Wen
AU  - Liu, Chi-Min
T2  - AES Convention 132
M1  - Paper 8653
PY  - 2012
DA  - 2012/04/06
UR  - https://aes.org/publications/elibrary-page/?id=16291
PB  - Audio Engineering Society
LA  - en
AB  - MPEG-4 high-efficiency advanced audio coding (HE-AAC) has adopted spectral band replication (SBR) to efficiently compress high-frequency parts of the audio. In SBR, the linear prediction is applied to low-frequency subbands to clip the tonal components and smooth the associated spectrum for replicating to high-frequency bands. Such a process is referred to as the whitening filtering. In SBR, to avoid the alias artifact from spectral adjustment, a complex filterbank instead of real filterbank is adopted. For the QMF subbands, this paper analyzes that the linear prediction defined in SBR standard results in the predictive biases. An new whitening filter, called the decimation-whitening filter, is proposed to eliminate the predictive bias and provide advantages in terms of noise-to-signal ratio measure, frequency resolution, energy leakage, and computational complexity for SBR.
ER  -