Speaker Cluster Spatial Audio Rendering
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Solution Overview
Problem
Teleconferencing systems face challenges in distinguishing the source location of a participant's voice, combining multiple audio streams effectively, and maintaining consistent volume and noise reduction, leading to difficulties in intelligibility and spatial separation of voices.
Innovation Solution
A method and apparatus that process audio streams to create a perceived spatial scene using multiple speakers arranged in more than one dimension, enhancing out-of-phase and differential components, and applying matrix processing operations to position audio streams in a way that simulates a spatial extent beyond the speakers, allowing for isotropic voice characteristics across all listening angles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If multiple audio streams are combined into a single audio output, then the system achieves simplified audio processing, but the listener's ability to distinguish source locations and achieve perceptual separation deteriorates
Solution Approach 1:
The patent applies dimensionality change by transitioning from traditional mono or stereo speaker arrangements to a three-dimensional spatial audio system. Multiple speakers are positioned in three-dimensional space around the listener, creating a spherical or volumetric sound field. This allows audio streams to be distributed across multiple spatial dimensions, enabling listeners to perceive the direction and location of different voice sources while maintaining manageable processing complexity through systematic signal distribution.
2Volume of moving object
If audio is output through traditional single-dimension speaker arrangements, then the system achieves compact design, but the perceived spatial extent and voice separation capability deteriorates
Solution Approach 1:
The system achieves enhanced spatial perception within a compact form factor by utilizing three-dimensional speaker arrangements. Instead of expanding horizontally with traditional stereo setups, the speakers are positioned in a three-dimensional configuration (e.g., spherical, tetrahedral, or multi-level arrangements) that creates volumetric sound fields. This allows the system to maintain a compact physical footprint while providing listeners with rich spatial cues for voice source localization and separation.
Solution Approach 2:
The patent employs nested arrangements where speakers are positioned in hierarchical or concentric configurations. For example, speakers may be arranged in nested spherical layers or positioned at vertices of geometric shapes with smaller speakers nested within or between larger ones. This nesting strategy maximizes spatial utilization within a compact volume, creating multiple acoustic zones that enhance perceived spatial extent without significantly increasing the system's overall footprint.
3Quantity of substance
If background noise from multiple locations is combined, then the system achieves complete audio capture, but the overall noise level and interference increases
Solution Approach 1:
The patent applies local quality by assigning different processing characteristics to different audio streams based on their spatial origins. Each speaker position or audio channel receives customized signal processing tailored to its specific spatial characteristics and noise profile. This allows the system to selectively enhance or suppress noise components in different spatial zones while preserving the completeness of audio capture from all locations, rather than applying uniform processing to all signals.
Data Source
AI summary
A method of outputting audio in a teleconferencing environment includes receiving audio streams, processing the audio streams according to information regarding effective spatial positions, and outputting, by at least three speakers arranged in more than one dimension, the audio streams having been processed. The information regarding the plurality of effective spatial positions corresponds to a perceived spatial scene that extends beyond the speakers in at least two dimensions. In this manner, participants in the teleconference perceive the audio from the remote participants as originating at different positions in the teleconference room.