3D Audio Rendering From Synchronized Video and Microphone Arrays
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Solution Overview
Problem
Existing technologies struggle to generate realistic acoustic signals for listening at arbitrary positions in a space, as they fail to accurately separate and position sound source signals from multiple viewpoints.
Innovation Solution
An information processing apparatus and method that performs time synchronization processing on video and acoustic signals, calculates position information of subjects using multiple cameras and microphones, separates sound source signals, and assigns them to corresponding positions in a three-dimensional space to generate acoustic signals for arbitrary listening points.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If video signals and acoustic signals are obtained from multiple cameras and microphones, then position information and sound source separation are improved, but device complexity increases
Solution Approach 1:
The system divides the space into multiple regions and processes acoustic signals from different microphone arrays independently. Each microphone array processes sounds from its specific direction, separating the complex multi-source acoustic environment into manageable directional components. This segmentation enables accurate sound source positioning while maintaining processing efficiency.
Solution Approach 2:
The patent introduces an acoustic signal processing unit that acts as an intermediary between the raw acoustic signals from microphones and the final sound source separation. This intermediary unit performs beamforming and sound source separation processing, mediating the complex relationship between multiple microphones and multiple sound sources to achieve accurate positioning and separation.
2Reliability
If sound source signals are separated from multiple acoustic signals, then acoustic signal quality is improved, but processing time increases
Solution Approach 1:
The system performs preliminary time synchronization processing on video and acoustic signals before sound source separation. By pre-synchronizing the signals and pre-processing the acoustic data through beamforming, the system prepares the data in advance, reducing the computational burden during actual sound source separation and decreasing overall processing time.
Solution Approach 2:
The patent employs dynamic sound source separation that adapts to changing acoustic environments. The system continuously updates sound source positions and characteristics based on real-time acoustic signal analysis, allowing it to efficiently track and separate sound sources as they move or appear/disappear, thereby reducing processing time compared to static separation methods.
Data Source
AI summary
An information processing apparatus comprising: a memory storing instructions, and at least one processor configured to execute the instructions to: perform time synchronization processing for a plurality of video signals obtained by capturing a subject by a plurality of cameras in a space and a plurality of acoustic signals collected by a plurality of microphones in the space; calculate position information of the subject using the plurality of video signals and imaging conditions of the plurality of cameras; separate a sound source signal of the subject from the plurality of acoustic signals having undergone the synchronous processing; and generate an acoustic signal for listening, at an arbitrary listening position in the space, the sound source signal generated from the subject, by assigning the sound source signal of the subject to a position corresponding to the position information of the subject.