Spatial Audio Directivity Modeling for Low-Bandwidth Transmission
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Solution Overview
Problem
The transmission of directivity data for audio reproduction requires significant bandwidth due to the large amount of data, leading to potential transmission delays and increased rates, especially when considering multiple sound sources and directions.
Innovation Solution
Modeling directivity data using a mixture model comprising vMF and Kent distributions to reduce data size, generating model data that includes model parameters and difference information for transmission, allowing reconstruction on the reproduction side.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If directivity data is transmitted for each sound source type and direction to achieve high-quality audio reproduction, then audio quality is improved, but transmission bandwidth and data amount increase significantly
Solution Approach 1:
The patent transforms directivity data from raw measurement values to parametric representations using probability distribution functions. By changing the data format from detailed directional measurements to compact parametric models (mean, variance, distribution type), the data amount is reduced while preserving the essential acoustic characteristics needed for high-quality audio reproduction.
Solution Approach 2:
The patent extracts only the essential characteristics of directivity data by identifying and transmitting key parameters (such as mean direction, variance, and distribution type) rather than the complete raw data set. This extraction approach separates the critical information needed for audio quality from the redundant data, achieving compression without significant quality loss.
2Measurement precision
If directivity data for multiple directions and frequencies is provided to improve spatial audio quality, then audio realism is improved, but transmission delay increases
Solution Approach 1:
The patent converts comprehensive multi-directional directivity measurements into compact parametric models that capture the essential spatial characteristics. By representing complex directional data with a few key parameters (mean angle, variance, distribution shape), the transmission time is significantly reduced while maintaining the spatial audio quality needed for realistic sound reproduction.
3Measurement precision
If complete directivity data is transmitted to ensure accurate sound source positioning, then positioning accuracy is improved, but network bandwidth consumption increases
Solution Approach 1:
The patent extracts the essential positioning information from complete directivity data by identifying and transmitting only the critical parameters needed for accurate sound source localization. This includes extracting mean direction, spread characteristics, and distribution type, which are sufficient for positioning accuracy while consuming minimal network bandwidth.
Solution Approach 2:
The patent transforms detailed directivity measurements into compact parametric representations that preserve positioning accuracy. By changing the data structure from exhaustive directional measurements to concise parametric models, the network bandwidth consumption is reduced while maintaining the precision required for accurate sound source positioning.
Data Source
AI summary
The present technology relates to an information processing device, a method, and a program capable of reducing an amount of transmission of directivity data.An information processing device includes an acquisition unit configured to acquire model data obtained by modeling directivity data indicating directivity of a sound source, and a calculator configured to calculate the directivity data on the basis of the model data. The present technology can be applied to the information processing device.