Removal of Birdie Artifact in Perceptual Audio Coders

Prakash V, Kumar A, Konda P, Vadapalli SC. Removal of Birdie Artifact in Perceptual Audio Coders. In: AES Convention 116. Audio Engineering Society; 2004. Paper 6064. Available from: https://aes.org/publications/elibrary-page/?id=12723

@inproceedings{Prakash2004_12723,
  author = {Prakash, Vinod and Kumar, Anil and Konda, Preethi and Vadapalli, Sarat Chandra},
  title = {{Removal of Birdie Artifact in Perceptual Audio Coders}},
  booktitle = {AES Convention 116},
  note = {Paper 6064},
  year = {2004},
  month = may,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=12723}
}

TY  - CPAPER
TI  - Removal of Birdie Artifact in Perceptual Audio Coders
AU  - Prakash, Vinod
AU  - Kumar, Anil
AU  - Konda, Preethi
AU  - Vadapalli, Sarat Chandra
T2  - AES Convention 116
M1  - Paper 6064
PY  - 2004
DA  - 2004/05/06
UR  - https://aes.org/publications/elibrary-page/?id=12723
PB  - Audio Engineering Society
LA  - en
AB  - The birdie artifact is the predominant factor affecting audio quality of perceptual coders operating at very low bit rates. Conventional approaches to overcome the birdie artifact involve use of Low Pass Filters to reduce the amount of signal to quantize. This approach does not eliminate the birdie artifact if the effect is seen in the in-band components. This paper proposes a new algorithm to overcome the birdie artifact and hence improve the audio quality. The proposed algorithm modifies the bit allocation strategy such that the critical bands are preserved, while still maintaining the Perceptual distortion criteria. Results of Spectrogram analysis are presented.
ER  -