Patent ID: 9390717
Filing Date: 2016-07-12
CPC Classification: G10L

Claim Text:
1. An encoding device including: a subband division unit that performs band division of an input signal and generates high frequency subband signals of subbands of a high frequency side of the input signal; a calculation unit that calculates pseudo high frequency subband power to be an estimation value of high frequency subband power of the high frequency subband signal of a frame of a processing target, on the basis of a feature amount obtained from a low frequency signal of the input signal and an estimation coefficient selected in a frame immediately before the frame of the processing target of the input signal among a plurality of estimation coefficients prepared in advance; a generation unit that, when reuse of the estimation coefficient of the immediately previous frame is enabled in the frame of the processing target, on the basis of the pseudo high frequency subband power and the high frequency subband power obtained from the high frequency subband signal, generates data to obtain the reuse enabled estimation coefficient; a low frequency encoding unit that encodes the low frequency signal and generates low frequency encoding data; and a multiplexing unit that multiplexes the data and the low frequency encoding data and generates an output code string.