Patent ID: 11929085
Assignee: DOLBY INTERNATIONAL AB
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 19:
20. A method for generating in a decoder enhanced audio data from compressed-bitrate coded audio data based on enhancement metadata, wherein the method includes:
receiving audio data encoded at a compressed bitrate and enhancement metadata from an encoder;
core decoding the encoded audio data to obtain core decoded raw audio data;
inputting the core decoded raw audio data, companding control data, and a noise vector into an audio enhancer for processing the core decoded raw audio data based on enhancement metadata, wherein the companding control data includes information on a companding mode used for encoding the original audio data;
obtaining, as an output from the audio enhancer, enhanced audio data;
wherein the audio enhancer is trained using machine learning to generate enhanced audio from original audio, the companding control data, and the noise vector until a discriminator no longer distinguishes the original audio from the enhanced audio data; and
outputting the enhanced audio data, wherein the audio enhancer is a Generator trained in a Generative Adversarial Network (GAN) setting.