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ENCODING DEVICE AND METHOD, DECODING DEVICE AND METHOD, AND PROGRAM

  • US 20140200900A1
  • Filed: 08/14/2012
  • Published: 07/17/2014
  • Est. Priority Date: 08/24/2011
  • Status: Active Grant
First Claim
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1. An encoding device comprising:

  • a sub-band dividing unit configured to divide a frequency band of an input signal and generate a first sub-band signal of a first sub-band on a high frequency side of the input signal;

    a first sub-band power calculation unit configured to calculate first sub-band power of the first sub-band signal based on the first sub-band signal;

    a second sub-band power calculation unit configured to carry out an operation to weight more the first sub-band power having larger power, and calculate second sub-band power of a second sub-band signal including a number of the continuous first sub-bands;

    a generating unit configured to generate data to obtain, by estimating, a high frequency signal of the input signal based on the second sub-band power;

    a low frequency encoding unit configured encode a low frequency signal of the input signal to generate low frequency encoded data; and

    a multiplexing unit configured to multiplex the data and the low frequency encoded data to generate an output code string.

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