Generation and processing of encoded audio data signal

Abstract

An audio apparatus receives an encoded audio data signal comprises a latent space feature set representing properties of a signal component of an audio signal. A trained artificial neural network (205) generates a frequency, and typically a pitch, parameter reflecting a pitch property of the signal component of the audio signal from the latent space feature set. A pulse sequence generator (207) generates a pulse sequence having properties dependent on the pitch parameter. A shaping circuit (209) generates a first audio signal from the pulse sequence by applying a spectro-temporal shaping to the pulse sequence with the spectro-temporal shaping being dependent on the latent space feature set. An output circuit (211) arranged to generate an output signal from the first audio signal. An encoding apparatus may generate the latent space feature set using a trained artificial neural network receiving parameters describing sinusoids / harmonics / harmonic grids as inputs.

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