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SIGNAL PROCESSING DEVICE, METHOD, AND PROGRAM

  • US 20170148452A1
  • Filed: 02/03/2017
  • Published: 05/25/2017
  • Est. Priority Date: 01/14/2011
  • Status: Active Grant
First Claim
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1. A signal processing device comprising:

  • an extracting unit that extracts a low frequency component of an audio signal, envelope information representing an envelope of a high frequency component of the audio signal, and sine wave information which includes information representing a distance from a start position of a frame of the high frequency component to an appearance start position of a sine wave component included in the high frequency component, and is for specifying a frequency and an appearance position of the sine wave component;

    a pseudo high frequency generating unit that generates a pseudo high frequency signal configuring the high frequency component on the basis of a low frequency signal as the low frequency component and the envelope information;

    a sine wave generating unit that generates a sine wave signal which is at a frequency represented by the sine wave information and in which the appearance start position specified from the sine wave information is set as a start position; and

    a combining unit that combines the low frequency signal, the pseudo high frequency signal, and the sine wave signal to generate an audio signal.

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