Display Speaker Positioning for Image-Sound Synchronization
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Solution Overview
Problem
Conventional speaker-mounted display devices face challenges in synchronizing the position of images and sound, as speakers are typically limited to the lower or rear ends, making it difficult to achieve a unified image and sound experience.
Innovation Solution
A display device with a control unit that specifies the sound source position from the image and performs signal processing on voice signals to output them to multiple speaker units, including those on the upper portion of the display, ensuring synchronized and localized sound emission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If speakers are disposed only on the lower end or both ends of the rear surface, then the device structure is simple, but the correspondence between image position and sound position is insufficient
Solution Approach 1:
The speaker system is divided into multiple independent speaker units distributed across different regions (upper, lower, left, right ends) of the display device. Each speaker unit can be independently controlled to emit sound in specific directions, enabling precise sound positioning that corresponds to the image content displayed on the screen.
Solution Approach 2:
The speaker arrangement transitions from a one-dimensional lower-end placement to a two-dimensional distributed arrangement across the entire rear surface of the display device. This spatial distribution enables sound to be emitted from multiple directions and positions, achieving three-dimensional sound field control that matches the visual display area.
2Measurement precision
If multiple speaker units are distributed across different regions, then the sound position correspondence is improved, but the device structure becomes complex
Solution Approach 1:
Each speaker unit is designed as a multi-functional component that can emit sound in multiple directions (front and rear) and handle different audio channels. The speaker units are uniformly structured but differently positioned, allowing the system to achieve complex sound field control through simple, standardized components rather than requiring different specialized speakers for each position.
3Measurement precision
If signal processing is performed for each speaker unit based on position, then the sound image localization is improved, but the control complexity increases
Solution Approach 1:
The signal processing system dynamically adjusts the characteristics (volume, delay, frequency) of audio signals based on the detected sound source position in the image. The control unit continuously monitors the image content, determines the sound source location, and automatically modifies the signal parameters for each speaker unit in real-time to maintain accurate sound-image correspondence.
Solution Approach 2:
The system incorporates feedback mechanisms where the control unit receives information about the sound source position from image analysis, processes this information to determine appropriate signal adjustments, and applies these adjustments to the speaker units. This closed-loop control ensures that the sound output consistently matches the visual sound source position on the display.
Data Source
AI summary
A display device includes: a control unit that specifies a sound source position from an image displayed on a display unit, and performs different types of signal processing on a voice signal synchronized with the image according to the sound source position, the voice signal being output to a plurality of sets of speaker units, the plurality of sets of speaker units including at least one set of speaker units provided on an upper portion of the display unit.