High Order LPC and Line Spectrum Pairs

Eng KHC, Huang DY, Foo SW. High Order LPC and Line Spectrum Pairs. In: AES Convention 112. Audio Engineering Society; 2002. Paper 5572. Available from: https://aes.org/publications/elibrary-page/?id=11341

@inproceedings{Eng2002_11341,
  author = {Eng, Kelvin H. C. and Huang, Dong Yan and Foo, Say Wei},
  title = {{High Order LPC and Line Spectrum Pairs}},
  booktitle = {AES Convention 112},
  note = {Paper 5572},
  year = {2002},
  month = apr,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=11341}
}

TY  - CPAPER
TI  - High Order LPC and Line Spectrum Pairs
AU  - Eng, Kelvin H. C.
AU  - Huang, Dong Yan
AU  - Foo, Say Wei
T2  - AES Convention 112
M1  - Paper 5572
PY  - 2002
DA  - 2002/04/06
UR  - https://aes.org/publications/elibrary-page/?id=11341
PB  - Audio Engineering Society
LA  - en
AB  - High order linear predictive coding (LPC) analysis, as a pre-preprocessing stage in an audio codec designed for wideband arbitrary audio signals, is found to be particularly beneficial for audio samples of an instrumental nature compared to that of a vocal nature. With increasing LPC orders, it is imperative to keep the bits consumed by the pre-processing stage constant as a proportion of the total bit rate. To achieve this, the properties of the Line Spectrum Pairs (LSP) parameter are exploited in a proposed multistage vector quantization scheme for high order LPC. Notably, incorporating LSP differences in the design of the quantizer was the most efficient, with no perceptible differences at an average of 1.645 bits/sample, compared to the case of scalar quantization, which is used as a benchmark at 2 bits/sample. Particularly, using LSP differences as a bit allocation mechanism proves to be especially effective in dealing with clips of a percussive nature.
ER  -