Spatial Audio Parameter Fields for Accurate Rendering
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Solution Overview
Problem
Current audio processing technologies face challenges in effectively estimating and rendering spatial audio parameters, particularly in frequency bands, which affects the accuracy and quality of spatial sound reproduction across different formats and devices.
Innovation Solution
An apparatus and method that define and process parameter fields associated with multi-channel audio signals to determine spatial audio parameters, such as directions and energy ratios, enabling accurate rendering of spatial audio across various formats like binaural, Ambisonics, and loudspeaker systems, by identifying microphone profiles, head-related transfer functions, and processing variants.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If parametric spatial audio processing is used to estimate spatial parameters from microphone array signals, then the perceptual spatial properties can be accurately described, but the complexity of processing and rendering across different formats increases
Solution Approach 1:
The patent segments the spatial audio processing into distinct parameter fields (e.g., direction parameters, energy ratio parameters, microphone configuration parameters) that can be independently estimated, stored, and rendered. This segmentation allows the complex processing to be broken down into manageable components while maintaining overall spatial accuracy.
Solution Approach 2:
The patent creates a universal parameter field structure that can be used across multiple audio formats (binaural, Ambisonics, loudspeaker systems). The same parameter fields serve different rendering purposes, reducing the need for format-specific processing while maintaining adaptability.
2Manufacturing precision
If detailed parameter fields are defined to capture microphone profiles and processing variants, then the rendering accuracy improves, but the data structure complexity increases
Solution Approach 1:
The patent applies local quality by defining specific parameter fields for different aspects of audio processing (microphone profile, processing variant, configuration details) only where needed. Each parameter field contains detailed information relevant to its specific function, allowing high rendering accuracy without uniformly complex data structures throughout the entire system.
Data Source
AI summary
An apparatus including circuitry configured for: defining at least one parameter field associated with an input multi-channel audio signals, the at least one parameter field configured to describe at least one characteristic of the multi-channel audio signals; determining at least one spatial audio parameter associated with the multi-channel audio signals; and controlling a rendering of the multi-channel audio signals by processing the input multichannel audio signals using at least the at least one characteristic of the multi-channel audio signals and the at least one spatial audio parameter.