DAI Lin, YANG Jun, SHI Longxing. Fast and Precise Dequantization Algorithm in MP3/AAC Decoding Based on Chebyshev Approximation Polynomial[J]. Chinese Journal of Electronics, 2009, 18(2): 317-320.
Citation: DAI Lin, YANG Jun, SHI Longxing. Fast and Precise Dequantization Algorithm in MP3/AAC Decoding Based on Chebyshev Approximation Polynomial[J]. Chinese Journal of Electronics, 2009, 18(2): 317-320.

Fast and Precise Dequantization Algorithm in MP3/AAC Decoding Based on Chebyshev Approximation Polynomial

  • Received Date: 2008-01-01
  • Rev Recd Date: 2008-08-01
  • Publish Date: 2009-05-25
  • This paper proposes a fast and precise dequantization algorithm based on Chebyshev approximationpolynomial for MP3/AAC decoding. Due to the propertiesof Chebyshev approximation polynomial, compared withany other polynomial of the same degree, the infinity normof proposed algorithm reaches minimum. In contrast to theconventional method, the average error is reduced from0.03161 to 0.00051066 at the cost of two additional multiplications. The SNR (signal to noise ratio) for MP3/AACfiles is enhanced about 8dB averagely.
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      沈阳化工大学材料科学与工程学院 沈阳 110142

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