APPARATUS AND METHOD FOR CENTER SIGNAL SCALING AND STEREOPHONIC ENHANCEMENT BASED ON A SIGNAL-TO-DOWNMIX RATIO

摘要

An apparatus for generating a modified audio signal comprising two or more modified audio channels from an audio input signal comprising two or more audio input channels is provided. The apparatus comprises an information generator (110) for generating signal- to-downmix information. The information generator (110) is adapted to generate signal information by combining a spectral value of each of the two or more audio input channels in a first way. Moreover, the information generator (110) is adapted to generate down mix information by combining the spectral value of each of the two or more audio input channels in a second way being different from the first way. Furthermore, the information generator (110) is adapted to combine the signal information and the downmix information to obtain signal-to-downmix information. Moreover, the apparatus comprises a signal attenuator (120) for attenuating the two or more audio input channels depending on the signal-to-downmix information to obtain the two or more modified audio channels.