Patent ID: 11881228
Assignee: FRAUNHOFER GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 8:
9. A decoder for decoding a received signal comprising information related to prediction coefficients, the decoder comprising
a formant information calculator configured for calculating a speech related spectral shaping information from the prediction coefficients;
a noise generator configured for generating a decoding noise-like signal;
a shaper configured for shaping a spectrum of the decoding noise-like signal or an amplified representation thereof using the spectral shaping information to acquire a shaped decoding noise-like signal; and
a synthesizer configured for synthesizing a synthesized signal from the amplified shaped encoding noise-like signal and the prediction coefficients;
wherein the shaper is configured for combining a spectrum of the decoding noise-like signal or a spectrum derived thereof with a transfer function comprising

Ft(z)=1−βz−1 

wherein z indicates a representation in the z-domain, wherein β represents a measure (voicing) for a voicing determined by relating an energy of a past frame of the audio signal and an energy of a present frame of the audio signal, wherein the measure β is determined in function of a voicing value.