System for maintaining reversible dynamic range control information associated with parametric audio coders

System for maintaining reversible dynamic range control information associated with parametric audio coders

On the basis of a bitstream (P), an n-channel audio signal (X) is reconstructed by deriving an m-channel core signal (Y) and multichannel coding parameters (a) from the bitstream, where 1≤m

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Hauptverfasser: Kjoerling, Kristofer, Sehlstrom, Leif, Melkote, Vinay, Purnhagen, Heiko, Roeden, Karl J, Riedmiller, Jeffrey
Format: Patent
Sprache:eng
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ACOUSTICS
MUSICAL INSTRUMENTS
PHYSICS
SPEECH ANALYSIS OR SYNTHESIS
SPEECH OR AUDIO CODING OR DECODING
SPEECH OR VOICE PROCESSING
SPEECH RECOGNITION
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creator Kjoerling, Kristofer
Sehlstrom, Leif
Melkote, Vinay
Purnhagen, Heiko
Roeden, Karl J
Riedmiller, Jeffrey
description On the basis of a bitstream (P), an n-channel audio signal (X) is reconstructed by deriving an m-channel core signal (Y) and multichannel coding parameters (a) from the bitstream, where 1≤m
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Also derived from the bitstream are pre-processing dynamic range control, DRC, parameters (DRC2) quantifying an encoder-side dynamic range limiting of the core signal. The n-channel audio signal is obtained by parametric synthesis in accordance with the multichannel coding parameters and while cancelling any encoder-side dynamic range limiting based on the pre-processing DRC parameters. In particular embodiments, the reconstruction further includes use of compensated post-processing DRC parameters quantifying a potential decoder-side dynamic range compression. Cancellation of an encoder-side range limitation and range compression are preferably performed by different decoder-side components. 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subjects ACOUSTICS
MUSICAL INSTRUMENTS
PHYSICS
SPEECH ANALYSIS OR SYNTHESIS
SPEECH OR AUDIO CODING OR DECODING
SPEECH OR VOICE PROCESSING
SPEECH RECOGNITION
title System for maintaining reversible dynamic range control information associated with parametric audio coders
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