3D Audio Gain Correction via Directional Lookup Tables
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Solution Overview
Problem
The production of 3D audio content is time-consuming due to the higher dimensional complexity of sound source position information, leading to increased time costs and a scarcity of high-quality 3D audio content, with perceived loudness varying by sound direction, necessitating easier gain correction methods.
Innovation Solution
An information processing device and method that decides a gain correction value for audio signals based on the direction of an audio object viewed from a listener, using auditory property tables for interpolation and automatic mixing, allowing for intuitive user interface adjustments to ensure consistent loudness perception across different sound directions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If 3D audio content production uses higher dimensional position information (azimuth, elevation, distance), then sound spatial reproduction quality is improved, but production time cost increases significantly
Solution Approach 1:
The patent applies preliminary action by pre-calculating and storing gain correction values in a lookup table (LUT) for various azimuth and elevation angles before actual content production. During production, the system only needs to retrieve pre-computed values based on the audio object's position parameters, eliminating the need for real-time complex calculations and significantly reducing production time while maintaining high spatial reproduction quality
Solution Approach 2:
The patent uses copying by creating a lookup table that stores pre-computed gain correction values for different spatial positions. Instead of calculating gain corrections in real-time for each audio object, the system copies relevant pre-computed values from the table based on the object's azimuth and elevation parameters, dramatically simplifying the production process while preserving spatial audio quality
2Manufacturing precision
If gain correction is performed manually for each audio object, then loudness consistency across different directions is improved, but production complexity and time increase
Solution Approach 1:
The patent applies self-service by enabling the audio processing system to automatically determine and apply appropriate gain correction values based on the audio object's position parameters (azimuth and elevation). The system self-determines which gain correction value to apply by querying the lookup table using the object's spatial parameters, eliminating the need for manual intervention while ensuring consistent loudness across different sound directions
Solution Approach 2:
The patent introduces an intermediary approach by using a lookup table as a mediator between the audio object's position parameters and the required gain correction values. The lookup table serves as an intermediary data structure that maps spatial coordinates (azimuth, elevation) to appropriate gain correction values, enabling automatic and consistent loudness adjustment without complex manual processing
Data Source
AI summary
The present technology relates to an information processing device and method, a reproduction device and method, and a program that are capable of performing gain correction more easily.An information processing device includes a gain correction value decision unit that decides a correction value of a gain value for performing gain correction on an audio signal of an audio object in accordance with a direction of the audio object viewed from a listener. The present technology can be applied to a gain decision device and a reproduction device.