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Encoding device, encoding method, and program

  • US 9,437,197 B2
  • Filed: 03/23/2012
  • Issued: 09/06/2016
  • Est. Priority Date: 03/31/2011
  • Status: Active Grant
First Claim
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1. An encoding device, comprising:

  • a first high-frequency encoding circuit which calculates a high-frequency code amount being a code amount of a high-frequency code string for obtaining a high-frequency component based on a low-frequency component and the high-frequency component of an input signal;

    a low-frequency encoding circuit which encodes the low-frequency component of the input signal based on the high-frequency code amount calculated by the first high-frequency encoding circuit to generate a low-frequency code string;

    a low-frequency decoding circuit which decodes the low-frequency code string;

    a second high-frequency encoding circuit which generates the high-frequency code string based on a decoded low-frequency component obtained by decoding the low-frequency code string and the high-frequency component such that the code amount of the high-frequency code string is not larger than the high-frequency code amount;

    a multiplexing circuit which multiplexes the low-frequency code string and the high-frequency code string to generate an output code string; and

    a delay circuit which delays the high-frequency code amount, the decoded low-frequency component, and the high-frequency component input to the second high-frequency encoding circuit.

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