Method and apparatus for frequency compression with a selective frequency shift

摘要

A process for the frequency compression of an audio signal (s),a frequency range to a smaller frequency range is imaged by– Providing of the audio signal (s) in a plurality of frequency channels (11 '', 14'', 20, 20 '', 20 ", 22, 22'', 22") and– Displacement or imaging of a portion of the audio signal (s) of a first frequency channel (14 '') of the plurality of frequency channels (11'', 14 '', 20, 20'', 20 ", 22, 22 '', 22") in a second frequency channel (11'') of the plurality of frequency channels (11 '', 14'', 20, 20 '', 20 ", 22, 22'', 22''''),characterized in that– a dominant instantaneous frequency (14 ") in the first frequency channel (14 '') is determined,– in the case of the displacement or mapping first of all the entire first frequency channel (14 ''), including the dominant instantaneous frequency (14 ") in the second frequency channel (11'') is imaged or displaced, whereby the dominant instantaneous frequency (14") a between the frequency position (f_z) receives,– a final frequency position (f_d) for the dominant instantaneous frequency (14 ") by a predetermined continuous compression characteristic in the second frequency channel (11 '') starting from the frequency position (f_s) the dominant instantaneous frequency (14 ") in the first frequency channel (14 '') is determined and– the dominant instantaneous frequency (14 ") from the intermediate frequency position (f_z) to the final frequency position (f_d) is imaged is pushed or.