Frequency Scale Translation in the MDCT Domain for AAC Decoder Algorithm

Chi HJ, Kim TH, Park JS. Frequency Scale Translation in the MDCT Domain for AAC Decoder Algorithm. J Audio Eng Soc. 2014;62(3):118-126. doi:10.17743/jaes.2014.0012

@article{Chi2014_17127,
  author = {Chi, Hua Jun and Kim, Tae Hoon and Park, Ju Sung},
  title = {{Frequency Scale Translation in the MDCT Domain for AAC Decoder Algorithm}},
  journal = {Journal of the Audio Engineering Society},
  volume = {62},
  number = {3},
  pages = {118--126},
  year = {2014},
  month = mar,
  publisher = {Audio Engineering Society},
  doi = {10.17743/jaes.2014.0012},
  url = {https://doi.org/10.17743/jaes.2014.0012}
}

TY  - JOUR
TI  - Frequency Scale Translation in the MDCT Domain for AAC Decoder Algorithm
AU  - Chi, Hua Jun
AU  - Kim, Tae Hoon
AU  - Park, Ju Sung
T2  - Journal of the Audio Engineering Society
J2  - J. Audio Eng. Soc.
VL  - 62
IS  - 3
SP  - 118
EP  - 126
PY  - 2014
DA  - 2014/03/06
DO  - 10.17743/jaes.2014.0012
UR  - https://doi.org/10.17743/jaes.2014.0012
PB  - Audio Engineering Society
LA  - en
AB  - In mobile audio device applications, there is sometimes the need to include processing that can change the pitch or tempo of the sound. This additional signal processing can produce a power load on the batteries, which could be minimized if the decoder stage was combined with the pitch-time shift operation. The authors propose a modified AAC (advanced audio coding) decoder structure that can also change the pitch and tempo of an audio signal. To take advantage of the combination, the algorithm includes a preprocessing block before the IMDCT (inverse modified discrete cosine transform) block and a postprocessing block after the overlap and add block. Test results show that the algorithm produces quality results while reducing the computational load to 64% of the separate algorithms.
ER  -