Patent ID: 9119002
Filing Date: 2015-08-25
Classification: H04R,H04S

Abstract:
1. A method of processing an input audio signal by an apparatus comprising a processor coupled to an audio source and to one or more speakers arranged to output audio, the method comprising: receiving, using the processor, the input audio signal from the audio source: forming, using the processor, a plurality of output audio signals from the input audio signal, wherein each output audio signal is formed by performing respective processing on the input audio signal, wherein for a first output audio signal there is a target audio equalization operation comprising a target filter twice; and outputting, using the processor, the plurality of output audio signals to drive one or more speakers, wherein for the first output audio signal, the respective processing comprises a first audio equalization operation, the first audio equalization operation being the target audio equalization operation modified to compensate for phase shifts that correspond to zeros of the transfer function of the target audio equalization operation; wherein for each output audio signal other than the first output audio signal, the respective processing comprises a compensation filter that compensates for phase shifts that correspond to poles of the transfer function of the target audio equalization operation.