Spatial audio processor and procedure to provide spatial parameters based on an acoustic input signal

摘要

A spatial audio processor to provide spatial parameters (102, Φ (k, n), Ψ (k, n)) based on an acoustic input signal, the spatial audio processor is characterized in that it comprises: a determiner of characteristics of signal (108, 308, 408, 508, 608, 808, 908) configured to determine a signal characteristic (110, 710, 810) of the acoustic input signal (104), and a controllable parameter estimator (106, 306 , 406, 506, 606, 606a, 606b, 806, 906) to calculate the spatial parameters (102, Φ (k, n), Ψ (k, n)) for the acoustic input signal (104) according to a rule of variable spatial parameter calculation; wherein the controllable parameter estimator (106, 306, 406, 506, 606, 606a, 606b, 806, 906) is configured to modify the spatial parameter calculation rule according to the determined signal characteristic (110, 710, 810 ); wherein the signal characteristic determiner (308) is configured to determine a stationary interval of the acoustic input signal (104) and the controllable parameter estimator (306) is configured to modify the variable spatial parameter calculation rule according to the determined stationary interval, so that an average period for the calculation of the spatial parameters (102, Ψ (k, n), Φ (k, n)) is comparatively longer for a comparatively longer stationary interval and is comparatively shorter for a comparatively shorter stationary interval; or wherein the controllable parameter estimator (406, 506, 906) is configured to select a spatial parameter calculation rule (410, 412) out of a plurality of spatial parameter calculation rules (410, 412) for the calculation of spatial parameters (102, Ψ (k, n), Φ (k, n)), depending on the determined signal characteristic (110).