Spatial Audio Rendering with Spatio-Temporal Sound Object Control
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Solution Overview
Problem
Current audio rendering technologies struggle to allow users to adapt and modify recorded sound scenes by changing the position and state of sound objects over time, limiting the ability to create alternative rendered sound scenes.
Innovation Solution
A method involving the display of a spatio-temporal graph that visually represents the positions and states of sound objects over time, enabling user adaptation of these elements and rendering of spatial audio output based on the adapted graph.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a recorded sound scene is accurately reproduced as a rendered sound scene, then the fidelity of the original recording is improved, but the ability to adapt and modify the sound scene is limited
Solution Approach 1:
The sound scene is segmented into individual sound objects, each with independent position and state parameters. This allows the system to maintain accurate reproduction of the overall sound scene while enabling selective modification of individual objects, resolving the contradiction between fidelity and adaptability.
Solution Approach 2:
The system transitions from a static recorded sound scene to a dynamic rendered sound scene where sound objects can be repositioned and their states modified over time. The spatio-temporal graph visually represents this dynamic capability, allowing users to adapt the sound scene while maintaining temporal accuracy.
2Measurement precision
If multiple microphones are used to record a sound scene, then the spatial accuracy of the recorded sound scene is improved, but the complexity of rendering alternative sound scenes increases
Solution Approach 1:
The spatio-temporal graph serves as an intermediary representation between the multi-microphone recording data and the final rendered sound scene. It simplifies the complex spatial information from multiple microphones into a visual format that is easier to manipulate, reducing rendering complexity while preserving spatial accuracy.
Solution Approach 2:
The system creates a visual copy of the spatial-temporal relationships in the form of a spatio-temporal graph. This graphical representation allows users to interact with and modify sound object positions without directly manipulating the complex multi-channel audio data, reducing operational complexity.
3Measurement precision
If the position of sound objects is precisely tracked over time, then the accuracy of the rendered sound scene is improved, but the difficulty of user manipulation increases
Solution Approach 1:
The system replaces direct mechanical manipulation of audio parameters with visual manipulation of the spatio-temporal graph. Users can drag and drop visual representations of sound objects on the graph to reposition them in time and space, making precise position tracking accessible through intuitive visual interaction rather than complex technical manipulation.
Data Source
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AI summary
A method comprising: displaying a spatio-temporal graph that visually indicates the positions of a sound object at each time in a range of times and, in addition, simultaneously indicates a state of the sound object over the range of times; enabling user adaptation of the spatio-temporal graph to change a position of the sound object during at least a portion of the range of times and/or a state of the sound object over at least a portion of the range of times; and enabling rendering of spatial audio output using the position and state of the sound object indicated by the adapted spatio-temporal graph.