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Signal processing apparatus and signal processing method, encoder and encoding method, decoder and decoding method, and program

  • US 10,381,018 B2
  • Filed: 07/26/2018
  • Issued: 08/13/2019
  • Est. Priority Date: 04/13/2010
  • Status: Active Grant
First Claim
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1. A decoder comprising:

  • a demultiplexing circuit configured to demultiplex input encoded data into high band encoded data and low band encoded data, wherein the high band encoded data includes segment information for segments,wherein each of the segments includes a plurality of frames associated with a same coefficient,wherein the segment information includes information of a number of segments, a length of each segment, and coefficient information for the plurality of frames;

    a low band decoding circuit configured to decode the low band encoded data to produce a low band signal;

    a selection circuit configured to select a coefficient from a plurality of the coefficients specified in the coefficient information included in the high band encoded data;

    a high band sub-band power calculation circuit configured to calculate a high band sub-band power of a high band sub-band signal based on a low band sub-band signal of a plurality of sub-bands constituting the low band signal and the selected coefficient; and

    a high band signal production circuit configured to produce a high band signal based on the high band sub-band power and the low band sub-band signal.

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