MDCT Sinusoidal Analysis for Audio Signals Analysis and Processing

@article{Zhang2013MDCTSA,
  title={MDCT Sinusoidal Analysis for Audio Signals Analysis and Processing},
  author={Shuhua Zhang and Weibei Dou and Huazhong Yang},
  journal={IEEE Transactions on Audio, Speech, and Language Processing},
  year={2013},
  volume={21},
  pages={1403-1414}
}
The Modified Discrete Cosine Transform (MDCT) is widely used in audio signals compression, but mostly limited to representing audio signals. This is because the MDCT is a real transform: Phase information is missing and spectral power varies frame to frame even for pure sine waves. We have a key observation concerning the structure of the MDCT spectrum of a sine wave: Across frames, the complete spectrum changes substantially, but if separated into even and odd subspectra, neither changes… CONTINUE READING
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