Patent ID: 9640189
Date: 2017-05-02
CPC Classifications: G10L

Claim:
1. An apparatus for generating a frequency enhancement signal, comprising: a calculator for calculating a value describing an energy distribution with respect to frequency in a core signal; a signal generator for generating an enhancement signal comprising an enhancement frequency range not comprised in the core signal, from the core signal, and wherein the signal generator is configured for shaping the enhancement signal or the core signal so that a spectral envelope of the enhancement signal or of the core signal depends on the value describing the energy distribution with respect to frequency in the core signal, wherein the signal generator is configured to shape the enhancement signal or the core signal so that a first spectral envelope decrease from a first frequency in the enhancement frequency range to a second higher frequency in the enhancement frequency range is acquired for a first value describing a first energy distribution, and so that a second spectral envelope decrease from the first frequency in the enhancement range to the second frequency in the enhancement range is acquired for a second value describing a second energy distribution, wherein the second frequency is greater than the first frequency, wherein the second spectral envelope decrease is greater than the first spectral envelope decrease, and wherein the first value indicates that the core signal comprises an energy concentration at a higher frequency of the core signal compared to the second value.