Patent ID: 9607622
Date: 2017-03-28
CPC Classifications: G10L,H04S

Claim:
1. An audio-signal processing device comprising: a decoding unit configured to decode a compressed audio stream to obtain audio signals for a predetermined number of channels; a signal processing unit configured to generate 2-channel audio signals including left-channel audio signals and right-channel audio signals, on a basis of the predetermined-number-of-channels audio signals obtained by the decoding unit, wherein the signal processing unit a coefficient setting unit configured to set filter coefficients for the first plurality of digital filters and the second plurality of digital filters, selected from filter coefficients being held in a coefficient holding unit as time-series coefficient data corresponding to the impulse responses for the digital filters in the signal processing unit, on a basis of a received format information that indicates a format of the compressed audio stream and of a decode-mode information of the decoding unit, wherein the format information indicates a number of channels that are in the compressed audio stream, wherein at least one individual filter coefficient of the selected filter coefficients is shared by two or more digital filters selected from a group consisting of the first plurality of digital filters and the second plurality of digital filters, wherein the predetermined-number-of-channels audio signals are 7.1 channel audio signals including a front high signal or a back surround signal, wherein the coefficient setting unit is further configured to set filter coefficients for the front high signal or the back surround signal to be the selected filter coefficients shared by the two or more digital filters, and wherein the decoding unit, the signal processing unit, and the coefficient setting unit are each implemented via at least one processor.