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DECODING DEVICE, CONTROL METHOD FOR A DECODING DEVICE, TRANSMISSION SYSTEM, AND COMPUTER-READABLE RECORDING MEDIUM HAVING A CONTROL PROGRAM RECORDED THEREON

  • US 20120213289A1
  • Filed: 06/23/2010
  • Published: 08/23/2012
  • Est. Priority Date: 11/17/2009
  • Status: Active Grant
First Claim
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1. A decoding device that outputs an output signal by receiving, as an input, an encoded signal including a signal in which an original signal is encoded, the original signal being indicative of contents of at least one of image and audio, and the output signal being indicative of the contents, the decoding device comprising:

  • decoding means for decoding the encoded signal, to generate a decoded signal;

    low-frequency component removing means for removing, from frequency components of the decoded signal, a low-frequency component at least including a direct current component, to generate a low-frequency-free signal;

    nonlinear processing means for generating a nonlinear process signal (i) in which positive and negative signs of the low-frequency-free signal are retained and (ii) which broadly monotonically increases nonlinearly with respect to the low-frequency-free signal when values of the low-frequency-free signal are at least in the vicinity of 0; and

    addition means for adding the nonlinear process signal to the decoded signal, to generate an addition signal,the addition signal being outputted as the output signal.

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