Concept for combined dynamic range compression and guided clipping prevention for audio devices

A method for operating an audio decoder, for decoding an audio bitstream and a metadata bitstream related to the audio bitstream, the method comprising:

• deriving a decoded audio signal from the audio bitstream;
• using an audio processing chain comprising a plurality of adjusting stages for adjusting characteristics of an audio output signal of the audio processing chain including adjusting a dynamic range of the audio output signal by a dynamic range control stage, which is an adjustment stage of the audio processing chain, and preventing of clipping of the audio output signal at the audio decoder by a guided clipping prevention stage, which is an adjustment stage of the audio processing chain;
• receiving, on the part of a metadata decoder, the metadata bitstream and extracting dynamic range control gain sequences and guided clipping prevention gain sequences from the metadata bitstream;
• supplying at least a part of the dynamic range control gain sequences to the dynamic range control stage;
• supplying at least a part of the guided clipping prevention gain sequences to the guided clipping prevention stage;
• using a metadata and parameter control stage for providing metadata and parameters to at least one of the adjustment stages on the basis of configuration information received from a configuration providing stage;
• and
• using the guided clipping prevention stage for receiving the guided clipping prevention gain sequences from the metadata and parameter control stage in an uncompressed form, wherein final time-domain guided clipping prevention gain values are interpolated with a temporal resolution corresponding to the temporal resolution of the de-coded audio signal, wherein the final guiding clipping prevention gains are applied to the decoded audio signal, where an assignment of one of the final guided clipping prevention sequences to channels and/or objects is observed.

A non-transitory digital storage medium having a computer program stored thereon to perform a method for operating an audio decoder, for decoding an audio bitstream and a metadata bitstream related to the audio bitstream, the method comprising:

• deriving a decoded audio signal from the audio bitstream;
• using an audio processing chain comprising a plurality of adjusting stages for adjusting characteristics of an audio output signal of the audio processing chain including adjusting a dynamic range of the audio output signal by a dynamic range control stage, which is an adjustment stage of the audio processing chain, and preventing of clipping of the audio output signal at the audio decoder by a guided clipping prevention stage, which is an adjustment stage of the audio processing chain;
• receiving, on the part of a metadata decoder, the metadata bitstream and extracting dynamic range control gain sequences and guided clipping prevention gain sequences from the metadata bitstream;
• supplying at least a part of the dynamic range control gain sequences to the dynamic range control stage;
• and
• supplying at least a part of the guided clipping prevention gain sequences to the guided clipping prevention stage;
• using a metadata and parameter control stage for providing metadata and parameters to at least one of the adjustment stages on the basis of configuration information received from a configuration providing stage;
• and
• using the guided clipping prevention stage for receiving the guided clipping prevention gain sequences from the metadata and parameter control stage in an uncompressed form, wherein final time-domain guided clipping prevention gain values are interpolated with a temporal resolution corresponding to the temporal resolution of the de-coded audio signal, wherein the final guiding clipping prevention gains are applied to the decoded audio signal, where an assignment of one of the final guided clipping prevention sequences to channels and/or objects is observed,
• when said computer program is run by a computer.