Trans-aural Audio Correction for Listener Position Deviation
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Solution Overview
Problem
Existing audio processing systems fail to maintain the trans-aural effect when a listener changes position, as the effect diminishes significantly due to changes in the listening position relative to the speaker apparatuses, and current methods are insufficient in ensuring the required viewing angle alignment for effective trans-aural reproduction.
Innovation Solution
An audio processing device and method that includes a trans-aural processing unit and a correction processing unit, which performs speaker rearrangement processing to virtually adjust the positions of real speaker apparatuses to match the optimal viewing angle, ensuring the trans-aural effect is maintained by using virtual speaker apparatuses and filter coefficients to correct the angle deviation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If trans-aural processing is applied to an audio signal, then sound image localization is improved, but the effect diminishes when the listener changes position
Solution Approach 1:
The patent applies dynamics by making the speaker arrangement configurable based on listener position. The system dynamically adjusts the virtual speaker positions and corresponding filter coefficients according to the detected listener location, allowing the trans-aural processing to adapt to changing spatial conditions and maintain effective sound image localization across different positions.
Solution Approach 2:
The patent changes parameters by adjusting the filter coefficients corresponding to different speaker arrangements. When the listener position changes, the system selects or calculates different filter coefficients that match the new spatial configuration, thereby maintaining the trans-aural effect without requiring physical repositioning of actual speakers.
2Reliability
If the listener position deviates from the service area, then the trans-aural effect is maintained, but the viewing angle alignment becomes insufficient
Solution Approach 1:
The patent uses an intermediary approach by introducing virtual speaker apparatuses as mediators between the physical speakers and the listener. The virtual speakers are positioned according to the listener's location, and filter coefficients are applied to transform the audio signal as if it were coming from these virtual positions, thereby maintaining proper viewing angle alignment even when the listener is not at the optimal service area position.
3Measurement precision
If speaker apparatus positions are physically adjusted, then optimal viewing angle is achieved, but device complexity increases
Solution Approach 1:
The patent applies copying by creating virtual representations of speaker apparatuses rather than physically moving actual speakers. The virtual speaker positions are calculated based on listener location, and the system processes audio signals as if they originated from these virtual positions using appropriate filter coefficients. This virtual copying approach achieves precise viewing angle alignment without the complexity of physical speaker repositioning.
Data Source
AI summary
An audio processing device, including: a trans-aural processing unit configured to perform trans-aural processing with respect to a predetermined audio signal; and a correction processing unit configured to perform correction processing in accordance with a change in a listening position with respect to the audio signal having been subjected to the trans-aural processing.