Patent ID: 9679580
Date: 2017-06-13
CPC Classifications: G10L

Claim:
1. A signal processing apparatus 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 segment includes a plurality of frames associated with a same coefficient, 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 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 the high band signal based on the high band sub-band power and the low band sub-band signal.