Audio bandwidth extension based on Grey model

  title={Audio bandwidth extension based on Grey model},
  author={Haichuan Bai and Changchun Bao and Xin Liu and Hongrui Li},
  journal={2013 Asia-Pacific Signal and Information Processing Association Annual Summit and Conference},
A kind of audio bandwidth extension method based on Grey Model is proposed in this paper. Grey Model is utilized for estimating the envelope of high-frequency spectrum, according to the evolutionary tendency of audio spectral envelope. In addition, nearest-neighbor matching is utilized to predict the fine spectrum of high-frequency components. At last, through the envelope adjustment of high-frequency spectrum, the bandwidth extension of audio signals from wideband to super-wideband can be… CONTINUE READING
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