Spatial Audio Localization for Sound Interference Reduction
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Solution Overview
Problem
Information processing devices face challenges in minimizing sound interference between simultaneously generated sound elements during content reproduction, leading to user discomfort due to interrupted audio experiences.
Innovation Solution
An information processing device that acquires sound elements, determines their importance levels, and adjusts the sound source position using a signal processing unit to suppress interference between sound elements, allowing for seamless coexistence of multiple audio streams.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the sound source position of dialog and reproduced content is localized to the same inside head position, then the user can hear both sound elements clearly, but sound interference occurs between the dialog and reproduced content making it difficult to listen to both
Solution Approach 1:
The patent applies dimensionality change by moving the sound source position from the traditional inside-head localization to an outside-head position in three-dimensional space. Specifically, when sound interference is detected between dialog and reproduced content, the system relocates one of the sound sources to an external position (e.g., above or beside the user's head), thereby separating them in spatial dimension and eliminating the interference while maintaining clear audibility of both sound elements.
2Object-affected harmful factors
If content reproduction is stopped while a dialog is being generated, then sound interference between dialog and content is eliminated, but the reproduced content is interrupted causing user discomfort
Solution Approach 1:
The patent implements dynamics by making the sound source position adjustable and changeable in real-time based on the generation state of different sound elements. The system dynamically switches between inside-head and outside-head localization modes: when only one sound element is present, it uses inside-head positioning for immersive experience; when multiple sound elements are generated simultaneously, it switches to outside-head positioning to prevent interference, all while maintaining continuous content playback without interruption.
3Object-affected harmful factors
If the sound source position of sound elements is changed to outside head localization, then sound interference is suppressed, but the technology does not provide user-controllable sound image localization position adjustment
Solution Approach 1:
The patent applies parameter changes by introducing user-controllable parameters for sound image localization. The system provides multiple preset positions (inside head, outside head, various directional positions) and allows users to adjust the sound source position parameters according to their preferences and listening scenarios. This enables users to select the most appropriate localization mode to suppress sound interference while maintaining adaptability to different usage contexts.
Data Source
AI summary
The information processing device includes an acquisition unit, a determination unit, and a signal processing unit. The acquisition unit acquires one or a plurality of other sound elements. The determination unit determines importance levels of the sound elements acquired by the acquisition unit. The signal processing unit changes a sound source position of at least one of a sound element of a content being reproduced or another sound element according to the importance levels of the sound elements determined by the determination unit. Consequently, even in a case where the sound element of the reproduced content and the another sound element are simultaneously generated, sound interference between the sound element of the reproduced content and the another sound element can be suppressed.