Screen Speaker Gain Control for Precise Sound Image Positioning
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Solution Overview
Problem
Existing screen sound generation technologies, relying on traditional two-channel and three-channel audio playback, fail to effectively integrate sound and picture on large display screens, leading to suboptimal audio-visual experiences.
Innovation Solution
An audio control method that determines the position of loudspeakers based on sound image coordinates and viewer position, adjusts output gains using vector-based amplitude panning algorithms, and calculates output audio data to enhance sound and picture integration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional two-channel and three-channel audio playback technology is used, then the device complexity is low, but the audio-visual integration effect is poor
Solution Approach 1:
The patent divides the audio playback system into multiple independent channels (at least four channels) corresponding to different spatial positions (front left, front right, rear left, rear right). Each channel is independently controlled through separate amplifiers and speakers, enabling precise spatial audio rendering that integrates with the visual display layout.
Solution Approach 2:
The patent transitions from traditional planar audio playback to three-dimensional spatial audio by adding rear-channel speakers and implementing object-based audio rendering. This creates a volumetric sound field that surrounds the viewer, matching the three-dimensional display space and achieving true audio-visual integration.
2Manufacturing precision
If more speakers are arranged under the display screen, then the audio-visual integration effect is improved, but the device complexity increases
Solution Approach 1:
The patent implements a universal audio rendering system that can adapt to different display sizes and configurations through object-based audio processing. The same multi-channel architecture serves various application scenarios (movies, games, virtual reality) without requiring hardware changes, making the complex speaker arrangement universally applicable.
Solution Approach 2:
The system dynamically selects and activates different speaker combinations based on the audio content and desired spatial rendering. The controller can adaptively route audio signals to specific speaker channels depending on the sound object position and user viewing angle, optimizing the performance without requiring all speakers to be always active.
Data Source
AI summary
An audio control method, a control device, a driving circuit and a readable storage medium are provided. The audio control method according to some embodiments of the present disclosure is applicable to the display screen configured with M speakers, and the method includes: obtaining a sound image coordinate of a sound object relative to the display screen; determining N speakers from the M speakers as loudspeakers according to the sound image coordinate and position coordinates of the M speakers relative to the display screen; determining output gains of the N loudspeakers according to distances between the N loudspeakers and a viewer of the display screen and sound attenuation coefficients; and calculating output audio data of the sound object in the display screen according to audio data of the sound object and the output gains of the N loudspeakers, and controlling the M speakers to play the output audio data.