Spatial Cue Rendering for Controllable Multichannel Audio Decoding
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Solution Overview
Problem
Conventional methods for rendering multi-object or multi-channel audio signals lack flexibility in controlling the spatial positioning of audio signals during decoding, relying on fixed positions and limited control over spatial cues.
Innovation Solution
An apparatus and method that utilizes a spatial cue renderer to decode and control multi-object or multi-channel audio signals by manipulating spatial cues such as Channel Level Difference (CLD), Channel Prediction Coefficient (CPC), and Inter-Channel Correlation (ICC), allowing for flexible positioning of audio signals based on user input or external control information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional SAC decoding is used, then audio signals can be decoded from down-mixed signals, but the spatial positioning of audio signals is fixed and cannot be controlled flexibly
Solution Approach 1:
The decoder is segmented into functional modules: a spatial cue renderer that receives spatial cue information (CLD, CPC, ICC) and generates control signals, and a rendering module that applies these signals. This segmentation allows independent control of spatial parameters without redesigning the entire decoding system, achieving flexible spatial positioning while maintaining manageable complexity.
Solution Approach 2:
The system transitions from fixed spatial positioning to dynamic control by introducing controllable spatial cue parameters. The spatial cue renderer dynamically adjusts CLD, CPC, and ICC values based on input signals, enabling real-time modification of audio signal positions in the sound field without altering the fundamental decoding architecture.
2Measurement precision
If spatial cue information is transmitted, then sound quality is improved, but control over rendering positions is limited
Solution Approach 1:
The spatial cue renderer is designed to handle multiple spatial cue parameters (CLD, CPC, ICC) through a single unified interface. This multi-functional design allows precise control of various spatial attributes using one device, improving both measurement precision and ease of operation by consolidating control functions.
Solution Approach 2:
The system enables easy control by allowing direct modification of spatial cue parameters (CLD, CPC, ICC) without changing the underlying decoding structure. Users can adjust rendering positions by simply changing parameter values, making precise spatial control accessible and operationally simple.
Data Source
AI summary
The present research relates to controlling rendering of multi-object or multi-channel audio signals. The present research provides a method and apparatus for controlling rendering of multi-object or multi-channel audio signals based on spatial cues in a process of decoding the multi-object or multi-channel audio signals. To achieve the purpose, the method suggested in the research controls rendering in a spatial cue domain in the process of decoding the multi-object or multi-channel audio signals.