Patent ID: 9424852
Filing Date: 2016-08-23
CPC Classification: G10L,H04R,H04S

Claim Text:
1. A method for determining an inter-channel time difference of a multi-channel audio signal having at least two channels, wherein said method comprises the steps of: performing operations as follows on circuits of an electronic device: determining, at a number of consecutive time instances, an inter-channel correlation based on a cross-correlation function involving at least two different channels of the multi-channel audio signal, wherein each value of the inter-channel correlation is associated with a corresponding value of the inter-channel time difference; adaptively determining an adaptive inter-channel correlation threshold based on adaptive smoothing of the inter-channel correlation in time; evaluating a current value of inter-channel correlation in relation to the adaptive inter-channel correlation threshold to determine whether the corresponding current value of the inter-channel time difference is relevant; and determining an updated value of the inter-channel time difference based on the result of this evaluation. and performing at least one of decoding the multi-channel audio signal based on the updated value of the inter-channel time difference to generate a decoded multi-channel audio signal communicated toward speakers, and encoding the multi-channel audio signal based on the updated value of the inter-channel time difference to generate an encoded multi-channel audio signal transmitted toward speakers.