3D Audio Directivity Modeling for Lower Transmission Bandwidth
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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 needed for each sound source, leading to potential transmission delays and increased rates, especially when considering multiple directions and frequencies.
Innovation Solution
Modeling directivity data using a mixture model combining von Mises Fisher and Kent distributions to reduce data size, transmitting model parameters instead of the original data, and applying Huffman encoding for further compression.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If directivity data for multiple directions and frequencies is provided to improve audio reproduction quality, then the realism and directional accuracy of audio output is improved, but the data transmission amount increases causing delays and higher transmission rates
Solution Approach 1:
The patent extracts only the essential characteristics of directivity data by modeling it with probability distribution functions (von Mises-Fisher and Kent distributions). Instead of transmitting complete directivity data for all directions and frequencies, the system extracts key parameters (mean direction, concentration parameters, ellipticity) that capture the essential directional characteristics, thereby reducing transmission data量 while maintaining audio reproduction quality
Solution Approach 2:
The patent transforms directivity data from a complex multi-dimensional dataset into a simplified parameter set representing probability distribution characteristics. By changing the representation from raw directional values to statistical parameters (mean, concentration, ellipticity), the system achieves compact data representation that can be transmitted efficiently while still enabling accurate audio reproduction through parameter-based reconstruction
2Measurement precision
If comprehensive directivity data is transmitted to maintain high audio quality, then the directional characteristics are preserved accurately, but the transmission rate increases and bandwidth requirements increase
Solution Approach 1:
The patent creates simplified copies of directivity data in the form of probability distribution models. These models serve as compact representations that can be transmitted efficiently and then used to reconstruct the necessary directional characteristics for audio reproduction. The copied parameter sets enable accurate synthesis of directional audio without requiring transmission of the original comprehensive datasets
Solution Approach 2:
The patent inverts the traditional approach by not directly transmitting and using raw directivity data, but instead transmitting compressed parameter sets that describe probability distributions. The receiving system then uses these parameters to generate the necessary directivity information, effectively inverting the data flow from direct transmission to parameter-based synthesis, which dramatically reduces transmission requirements
Data Source
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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.