Adaptive Audio Object Streaming for 3D Spatial Rendering
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Solution Overview
Problem
Existing audio distribution systems are inflexible and incapable of accurately rendering sound in three-dimensional space, failing to account for playback environments and psychoacoustic principles, leading to a rough simulation of acoustic spaces rather than true multi-dimensional presentations.
Innovation Solution
The implementation of an object-oriented audio system that creates and streams audio objects with attributes such as location, velocity, and directivity, allowing for adaptive rendering based on environment and network conditions, enabling more accurate and immersive audio experiences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional fixed-channel audio distribution systems are used, then system simplicity is maintained, but adaptability to different playback environments and 3D rendering capabilities are lost
Solution Approach 1:
The audio signal is segmented into multiple independent audio objects, each representing a discrete sound source with its own attributes (position, velocity, directivity). This segmentation allows flexible reconfiguration and adaptive rendering across different playback environments without requiring a complete system redesign.
Solution Approach 2:
The system implements dynamic adaptability by allowing audio objects to be rendered in real-time based on playback environment characteristics, network conditions, and listener position. The rendering engine dynamically adjusts audio object parameters and spatial distribution to optimize the listening experience for each specific environment.
2Measurement precision
If fixed-channel audio systems are used, then implementation simplicity is maintained, but accuracy in rendering three-dimensional sound is compromised
Solution Approach 1:
The system transitions from traditional two-dimensional stereo or surround sound to three-dimensional spatial audio rendering. Audio objects are positioned in 3D space with coordinates (x, y, z) and rendered using psychoacoustic principles to create accurate spatial perception, enabling true multi-dimensional sound presentation.
Solution Approach 2:
The system changes multiple audio parameters simultaneously including spatial position, velocity, directivity patterns, and psychoacoustic attributes to achieve accurate 3D rendering. These parameter changes are applied dynamically to each audio object based on its characteristics and the desired spatial effect.
3Reliability
If all audio objects are streamed with high fidelity, then audio quality is improved, but network bandwidth consumption increases
Solution Approach 1:
The system applies partial action by selectively streaming audio objects based on their importance, spatial position, and current relevance to the listener. Less critical audio objects or those outside the listener's field of view are streamed with lower fidelity or omitted entirely, reducing bandwidth consumption while maintaining perceived audio quality.
Solution Approach 2:
The streaming system dynamically changes audio object parameters including bitrate, sampling rate, and compression level based on network conditions, listener position, and object importance. This adaptive parameter adjustment maintains audio quality for critical objects while reducing bandwidth consumption for less important ones.
Data Source
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AI summary
Systems and methods for providing object-oriented audio are described. Audio objects can be created by associat-ing sound sources with attributes of those sound sources, such as location, velocity, directivity, and the like. Audio objects can be used in place of or in addition to channels to distribute sound, for example, by streaming the audio objects over a network to a client device. The objects can define their locations in space with associated two or three dimensional coordinates. The objects can be adaptively streamed to the client device based on available network or client device resources. A renderer on the client device can use the attributes of the objects to determine how to render the objects. The renderer can further adapt the playback of the ob-jects based on information about a rendering environment of the client device. Various examples of audio object creation tech-niques are also described.