Method for frequency compression with harmonic correction and device

摘要

METHOD FOR FREQUENCY COMPRESSION WITH HARMONIC CORRECTION AND DEVICE 5 Abstract The present disclosure provides a method for compressing the frequency of an audio signal having a fundamental frequency and at least one harmonic (30). 10 The audio signal is provided in a plurality of frequency channels (31, 32). The harmonic (30) of the audio signal is shifted or mapped (33) from a first frequency channel (31) of the plurality of frequency channels into a second frequency channel (32). In addition a frequency (f35) which is likewise harmonic with respect to the fundamental frequency is estimated in the second frequency 15 channel (32), the harmonic (30) being shifted or mapped onto the estimated frequency (f35). As a result the harmonic pattern is preserved in the compressed signal and the artifacts are reduced. fo fc -, f f2 f3 f30 36 '3 34- 32 r-35 - 335 32 34 4AfL