Apparatus for mixing a plurality of input data streams

摘要

An apparatus (500) according to an embodiment of the present invention for mixing a first frame (540-1) of a first input data stream (510-1) and a second frame (540-2) of a second input data stream (510-2) comprises a processing unit (520) adapted to generate an output frame (550), wherein the output frame (550) comprises output spectral data describing a lower part of an output spectrum up to an output cross-over frequency, and wherein the output frame further comprises output SBR-data describing a higher part of the output spectrum above the output cross-over frequency by way of energy-related values in an output time/frequency grid resolution. The processing unit (520) is further adapted such that the output spectral data corresponding to frequencies below a minimum value of cross-over frequencies of the first frame, the second frame and the output cross-over frequency is generated in a spectral domain and the output SBR-data corresponding to frequencies above a maximum value of cross-over frequencies of the first and second frames and the output cross-over frequency is processed in a SBR-domain.