Audio Parameter Adjuster for SAOC Distortion Reduction
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Solution Overview
Problem
Existing audio processing techniques face challenges in providing high-quality multi-channel audio while maintaining a good tradeoff between audio quality and bitrate requirements, often resulting in audible degradations due to non-optimal parameter settings in SAOC systems.
Innovation Solution
An apparatus and method that adjust rendering parameters based on object-related parametric information to reduce distortions in the upmix signal representation, using a parameter adjuster to modify rendering coefficients and limit distortions within predetermined ranges, ensuring improved perceptual quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If parametric techniques are used for bitrate-efficient transmission and storage of multi-channel audio, then bitrate requirements are reduced, but audible degradations occur due to non-optimal parameter settings
Solution Approach 1:
The patent adjusts rendering parameters (such as rendering coefficients and object level differences) based on object-related parametric information to optimize the balance between bitrate efficiency and audio quality. By dynamically modifying parameters like rendering coefficients and limiting distortion metrics, the system maintains perceptual audio quality while achieving bitrate-efficient transmission and storage of multi-channel audio content.
2Reliability
If rendering parameters are adjusted to reduce distortions, then audio quality is improved, but device complexity increases
Solution Approach 1:
The patent performs preliminary adjustments of rendering parameters during the encoding or preprocessing stage based on object-related parametric information. By pre-computing optimal rendering coefficients and establishing distortion limits beforehand, the system reduces the computational burden during real-time decoding while maintaining audio quality. This preliminary action allows the decoder to simply apply pre-determined parameters rather than performing complex optimizations in real-time.
3Reliability
If object-related parametric information is used to adjust rendering parameters, then distortion is reduced, but information processing requirements increase
Solution Approach 1:
The patent extracts only the essential object-related parametric information needed for rendering parameter adjustment, such as object level differences and selected rendering coefficients, rather than processing all available audio data. By selectively extracting and utilizing only the critical parameters required for distortion reduction, the system achieves effective quality improvement while minimizing the data processing load during encoding and decoding operations.
Data Source
AI summary
An apparatus for providing one or more adjusted parameters for a provision of an upmix signal representation on the basis of a downmix signal representation and an object-related parametric information includes a parameter adjuster. The parameter adjuster is configured to receive one or more input parameters and to provide, on the basis thereof, one or more adjusted parameters. The parameter adjuster is configured to provide the one or more adjusted parameters in dependence on the one or more input parameters and the object-related parametric information, such that a distortion of the upmix signal representation caused by the use of non-optimal parameters is reduced at least for input parameters deviating from optimal parameters by more than a predetermined deviation.