APPARATUS AND METHOD FOR CONVERTING AN AUDIO SIGNAL INTO A PARAMETERIZED REPRESENTATION, APPARATUS AND METHOD FOR MODIFYING A PARAMETERIZED REPRESENTATION, APPARATUS AND METHOD FOR SYNTHESIZING A PARAMETERIZED REPRESENTATION OF AN AUDIO SIGNAL

摘要

Apparatus for converting an audio signal into a parameterized represen-tation, comprises a signal analyzer (102) for analyzing a portion of the audio signal to obtain an analysis result; a band pass estimator (106) for estimating information of a plurality of band pass filters based on the analysis result, wherein the information on the plurality of band pass filters comprises information on a filter shape for the portion of the audio signal, wherein the band width of a band pass filter is different over an au-dio spectrum and depends on the center fre-quency of the band pass filter; a modulation estimator (110) for estimating an amplitude modulation (112) or a frequency modulation (114 ) or a phase modulation for each band of the plurality of band pass filters for the portion of the audio signal using the infor-mation on the plurality of band pass filters; and an output interface (116) for transmitting, storing or modifying information on the amplitude modulation, information on the frequency modulation or phase modula-tion or the information on the plurality of band pass filters for the portion of the audio