Erzeugung dekorrelierter Signale

(A1) Bei transienten Audio-Eingangssignalen werden in einer Mehrkanal-Audio-Rekonstruktion unkorrelierte Ausgangssignale von einem Audio-Eingangssignal dadurch erzeugt, dass das Audio-Eingangssignal mit einer um eine Verzoegerungszeit verzoegerten Repraesentation des Audio-Eingangssignals so gemischt wird, dass in einem ersten Zeitintervall ein erstes Ausgangssignal dem Audio-Eingangssignal und ein zweites Ausgangssignal der verzoegerten Repraesentation des Audio-Eingangssignals entspricht, wobei in einem zweiten Zeitintervall das erste Ausgangssignal der verzoegerten Repraesentation des Audio-Eingangssignals und das zweite Ausgangssignal dem Audio-Eingangssignal entspricht.

DE 102007018032 A1 UPAB: 20081118 NOVELTY - The decorrelator has a mixer (60) combining representations of an audio-input signal (58) with an audio-input signal (54) to receive output signals (50, 52) with temporally varying parts and the representation of the signals (54, 58). The representation is delayed at a delay time. The signals (50, 52) respectively occupy 50 percent of the signal (54) and 50 percent of the representation of the signal (58), in a time interval, and respectively occupy 50 percent of the representation of the signal (58) and 50-percent of the signal (54) in another time interval. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for the following: (1) a method for producing output signals based on an audio-input signal (2) an audio decoder for producing output signals based on an audio input signal (3) a computer program with a program code for the execution of a method for producing output signals based on an audio input signal. USE - Decorrelator for producing de-correlated signals based on an audio-input signal. ADVANTAGE - The decorrelator effectively de-correlates the output signals, thus improving the signal quality during the presentation of the transient signals. The decorrelator uses small number of arithmetic operations, smaller time delay and smaller number of multiplications for producing the de-correlating signals.