Perceptual Distortion-Rate Optimization of Long Term Prediction in MPEG AAC

Nanjundaswamy T, Melkote V, Ravelli E, Rose K. Perceptual Distortion-Rate Optimization of Long Term Prediction in MPEG AAC. In: AES Convention 129. Audio Engineering Society; 2010. Paper 8288. Available from: https://aes.org/publications/elibrary-page/?id=15710

@inproceedings{Nanjundaswamy2010_15710,
  author = {Nanjundaswamy, Tejaswi and Melkote, Vinay and Ravelli, Emmanuel and Rose, Kenneth},
  title = {{Perceptual Distortion-Rate Optimization of Long Term Prediction in MPEG AAC}},
  booktitle = {AES Convention 129},
  note = {Paper 8288},
  year = {2010},
  month = nov,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=15710}
}

TY  - CPAPER
TI  - Perceptual Distortion-Rate Optimization of Long Term Prediction in MPEG AAC
AU  - Nanjundaswamy, Tejaswi
AU  - Melkote, Vinay
AU  - Ravelli, Emmanuel
AU  - Rose, Kenneth
T2  - AES Convention 129
M1  - Paper 8288
PY  - 2010
DA  - 2010/11/06
UR  - https://aes.org/publications/elibrary-page/?id=15710
PB  - Audio Engineering Society
LA  - en
AB  - Long Term Prediction (LTP) in MPEG Advanced Audio Coding (AAC) exploits inter-frame redundancies via predictive coding of the current frame, given previously reconstructed data. Particularly, AAC Low Delay mandates LTP, to exploit correlations that would otherwise be ignored due to the shorter frame size. The LTP parameters are typically selected by time-domain techniques aimed at minimizing the mean squared prediction error, which is mismatched with the ultimate perceptual criteria of audio coding. We thus propose a novel trellis-based approach that optimizes the LTP parameters, in conjunction with the quantization and coding parameters of the frame, explicitly in terms of the perceptual distortion and rate tradeoffs. A low complexity "two-loop" search alternative to the trellis is also proposed. Objective and subjective results provide evidence for substantial gains.
ER  -