Improved Noise Weighting in CELP Coding of Speech - Applying the Vorbis Psychoacoustic Model To Speex

Montgomery C, Valin JM. Improved Noise Weighting in CELP Coding of Speech - Applying the Vorbis Psychoacoustic Model To Speex. In: AES Convention 120. Audio Engineering Society; 2006. Paper 6746. Available from: https://aes.org/publications/elibrary-page/?id=13550

@inproceedings{Montgomery2006_13550,
  author = {Montgomery, Christopher and Valin, Jean-Marc},
  title = {{Improved Noise Weighting in CELP Coding of Speech - Applying the Vorbis Psychoacoustic Model To Speex}},
  booktitle = {AES Convention 120},
  note = {Paper 6746},
  year = {2006},
  month = may,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=13550}
}

TY  - CPAPER
TI  - Improved Noise Weighting in CELP Coding of Speech - Applying the Vorbis Psychoacoustic Model To Speex
AU  - Montgomery, Christopher
AU  - Valin, Jean-Marc
T2  - AES Convention 120
M1  - Paper 6746
PY  - 2006
DA  - 2006/05/06
UR  - https://aes.org/publications/elibrary-page/?id=13550
PB  - Audio Engineering Society
LA  - en
AB  - One key aspect of the CELP algorithm is that it shapes the coding noise using a simple, yet effective, weighting lter. In this paper, we improve the noise shaping of CELP using a more modern psychoacoustic model. This has the signi cant advantage of improving the quality of an existing codec without the need to change the bit-stream. More speci cally, we improve the Speex CELP codec by using the psychoacoustic model used in the Vorbis audio codec. The results show a signi cant increase in quality, especially at high bit-rates, where the improvement is equivalent to a 20% reduction in bit-rate. The technique itself is not speci c to Speex and could be applied to other CELP codecs.
ER  -