The Efficient Temporal Noise Shaping Method

Chang TW, Liu CM, Lee WC. The Efficient Temporal Noise Shaping Method. In: AES Convention 116. Audio Engineering Society; 2004. Paper 6051. Available from: https://aes.org/publications/elibrary-page/?id=12645

@inproceedings{Chang2004_12645,
  author = {Chang, Tzu-Wen and Liu, Chi-Min and Lee, Wen-Chieh},
  title = {{The Efficient Temporal Noise Shaping Method}},
  booktitle = {AES Convention 116},
  note = {Paper 6051},
  year = {2004},
  month = may,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=12645}
}

TY  - CPAPER
TI  - The Efficient Temporal Noise Shaping Method
AU  - Chang, Tzu-Wen
AU  - Liu, Chi-Min
AU  - Lee, Wen-Chieh
T2  - AES Convention 116
M1  - Paper 6051
PY  - 2004
DA  - 2004/05/06
UR  - https://aes.org/publications/elibrary-page/?id=12645
PB  - Audio Engineering Society
LA  - en
AB  - Temporal noise shaping has been defined in MPEG-4 AAC to control the pre-echo noise in attack signals. The module, which is especially important for the MPEG-4 Low Delay AAC due to the absence of window switching mechanism, can shape and control quantization noise spread to improve the quality under bit rate constraint. However, this paper illustrates that the TNS will introduce three artifacts. The first artifact is similar to the Gibbs phenomenon which has high noise level occurring at the edge of the attack signal. The second effect is the time-domain aliasing noise which has unusual noise at a distance from the attack time frame. The third is the noise spreading with the TNS filter orders. This paper will propose the efficient TNS method which shapes noise with good concerns on the above three artifacts. Also, we provide an efficient computing method to activate the TNS. Both subjective and objective tests are conducted to illustrate the improvement over existing TNS methods.
ER  -