Microphone Array Directivity Control for Video Monitoring
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing monitoring systems fail to accurately collect sound data from moving targets in video monitoring systems, leading to inefficient monitoring work due to the inability to effectively control sound directivity.
Innovation Solution
A directivity control apparatus and method that uses a plurality of microphones to form and adjust sound directivity towards a designated position in an image, allowing for accurate sound collection and tracking of moving targets by obtaining information on the target's movement and adjusting the sound directivity accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a microphone array apparatus is used to collect sound data, then sound collection capability is improved, but the ability to track moving targets accurately deteriorates
Solution Approach 1:
The patent applies dynamics by making the sound collecting unit's directivity adjustable and changeable in real-time. The control unit dynamically adjusts the directivity of the sound collecting unit to follow the moving target's position, transforming a static microphone array into a dynamic tracking system that adapts its sensitivity pattern according to target movement.
Solution Approach 2:
The patent implements feedback by using the image data from the imaging unit to provide position information about moving targets, which then feeds back to the control unit. The control unit uses this feedback to continuously adjust the sound collecting unit's directivity toward the current target position, creating a closed-loop tracking system.
2Productivity
If directivity is controlled to track a moving target, then sound collection efficiency is improved, but system complexity increases
Solution Approach 1:
The patent merges the imaging unit and sound collecting unit under a unified control unit that coordinates both subsystems. By combining these functions and using the image data from the imaging unit to guide the sound collecting unit's directivity, the system achieves efficient target tracking without requiring separate complex control mechanisms for each sensor type.
Solution Approach 2:
The control unit serves as an intermediary that receives image data indicating target position, processes this information, and generates appropriate control signals to adjust the sound collecting unit's directivity. This intermediary component simplifies the overall system architecture by centralizing the coordination logic rather than requiring direct complex interactions between multiple independent subsystems.
Data Source
AI summary
A directivity control apparatus is provided which controls a directivity of a sound collected by a first sound collector including a plurality of microphones. The directivity control apparatus forms a directivity of the sound in a direction toward a position of a monitoring target in an image displayed on a display. Information on the position of the monitoring target in the image displayed on the display is obtained. The directivity of the sound is changed toward the position of the monitoring target in accordance with a movement of the monitoring target by referring to the obtained information on the position of the monitoring target.