DEVICE, METHOD AND COMPUTER PROGRAM FOR FREELY SELECTABLE FREQUENCY SHIFTS IN THE SUBBAND DOMAIN

摘要

A device for producing a frequency-shifted audio signal based on an audio input signal is provided. The device has an interface and a frequency-shifting unit. The interface is configured for receiving the audio input signal. The frequency-shifting unit is configured for producing the frequency-shifted audio signal. The frequency-shifting unit is additionally configured to produce one of the second subband values based on one of the first subband values such that the second phase angle of this second subband value differs from the first phase angle of this first subband value by a phase angle difference, the phase angle difference being dependent on frequency information indicating by which frequency difference the audio input signal is to be shifted in order to obtain the frequency-shifted audio signal, and the phase angle difference being dependent on a frequency bandwidth of one of the first subbands.

主权项

1. A device for producing a frequency-shifted audio signal based on an audio input signal, wherein the audio input signal, for a plurality of first subbands, may be represented by one or several first subband values, the device comprising:
an interface for receiving the audio input signal, and a frequency-shifting unit for producing the frequency-shifted audio signal, the frequency-shifted audio signal, for a plurality of second subbands, comprising one or several second subband values each, wherein each of the first and second subband values comprises information on a respective phase angle, and wherein the frequency-shifting unit is configured to produce one of the second subband values based on one of the first subband values such that the second phase angle of this second subband value may differ from the first phase angle of this first subband value by a phase angle difference, the phase angle difference being dependent on frequency information indicating by which frequency difference the audio input signal is to be shifted in order to acquire the frequency-shifted audio signal, and the phase angle difference being dependent on a frequency bandwidth of one of the first subbands.