CONCEPT FOR COMBINED DYNAMIC RANGE COMPRESSION AND GUIDED CLIPPING PREVENTION FOR AUDIO DEVICES

摘要

The invention provides a concept for combined dynamic range compression and guided clipping prevention for audio devices. An audio decoder for decoding an audio bitstream and a metadata bitstream related to the audio bitstream according to the concept includes an audio processing chain including a plurality of adjustment stages including a dynamic range control stage for adjusting a dynamic range of the audio output signal and a guided clipping prevention stage for preventing clipping of the audio output signal; and a metadata decoder configured to receive the metadata bitstream and to extract dynamic range control gain sequences and guided clipping prevention gain sequences from the metadata bitstream, at least a part of the dynamic range control gain sequences being supplied to the dynamic range control stage, and at least a part of the guided clipping prevention gain sequences being supplied to the guided clipping prevention stage.

主权项

1. Audio encoder for producing an audio bitstream comprising one or more audio channels and/or one or more audio objects, the audio encoder comprising a metadata encoder for producing a metadata bitstream, the audio encoder being configured:
to receive at least one dynamic range control gain sequence for an audio frame comprising one or more dynamic range control gains for a dynamic range control stage of an audio decoder; to receive at least one guided clipping prevention gain sequence for the audio frame comprising one or more guided clipping prevention gains for a guided clipping prevention stage of the audio decoder; and to incorporate at least one of said dynamic range control gain sequences and at least one of said guided clipping prevention gain sequences into the metadata bitstream.