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Encoding apparatus, decoding apparatus and methods thereof

  • US 8,898,057 B2
  • Filed: 10/22/2010
  • Issued: 11/25/2014
  • Est. Priority Date: 10/23/2009
  • Status: Active Grant
First Claim
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1. An encoding apparatus that performs band enhancement using a low-band side spectrum and generates a high-band side spectrum, the encoding apparatus comprising:

  • a band setter that inputs an input signal of a frequency domain and uses a characteristic of the input signal of the frequency domain as a basis, or inputs the input signal of the frequency domain and a coding parameter and uses at least one of the coding parameter and a characteristic of the input signal of the frequency domain as a basis, for generating band setting information that decides a first band of a high-band side set by the band enhancement; and

    a high-band encoder that encodes the input signal of the first band decided based on the band setting information and generates high-band part coded information,wherein the band setter generates the band setting information that decides the first band and a low-band side second band by dividing the frequency domain into the first band and the second band,the encoding apparatus further comprising;

    a fixed-band encoder that encodes the input signal of a band fixed beforehand in a low-band part of the second band and generates fixed-band coded information; and

    a low-band encoder that encodes a difference between the input signal of the second band and the input signal of the fixed band and generates low-band part coded information.

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