Display Control Apparatus for Sound Collection Directivity Visualization
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Solution Overview
Problem
Existing methods for displaying the sound collection state in large-scale sound-collection areas, such as stadiums, fail to effectively convey the directivity of sound collection units, as they either cannot grasp the sound collection state attributable to directivity or only show the level of acoustic signals without considering the directivity formed by sound collection units.
Innovation Solution
A display control apparatus that acquires information about the directivity of sound collection units and superimposes an area image representing the sound-collection target area with a range image expressing the sound collection range based on the directivity, allowing for clear visualization of the sound collection state, including position, orientation, and sound collection range, using a combination of directional microphones and microphone arrays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the level of acoustic signals is displayed on division regions using a bar-form level meter, then the level of each acoustic signal can be grasped, but the sound collection state attributable to the directivity of sound collection units cannot be grasped
Solution Approach 1:
The patent transitions from displaying only acoustic signal levels (one dimension) to displaying both acoustic signal levels and directivity information (adding another dimension). This is achieved by superimposing range images representing sound collection ranges onto the area image, thereby preserving directivity information that was previously lost in conventional level-meter-only displays.
Solution Approach 2:
The display system is enhanced to serve multiple functions simultaneously: it displays acoustic signal levels (original function) and also visualizes directivity information through range images (new function). The superimposed display structure allows a single display interface to convey both types of information without requiring separate display systems.
2Shape
If a representation of a specified range is superimposed on a representation of a sound-collection target area, then the specified range can be visualized, but the sound collection state attributable to the directivity of sound collection units cannot be grasped
Solution Approach 1:
The patent applies local quality by making the range image represent specific acoustic characteristics (directivity and loudness) of particular sound collection units at specific locations. Each range image is locally tailored to reflect the directivity pattern and sound collection range of its corresponding sound collection unit, rather than using a generic specified range representation.
3Area of stationary object
If sound is collected in a large-scale sound-collection target area, then comprehensive sound coverage is achieved, but it becomes difficult to grasp the sound collection state attributable to the directivity of each sound collection unit
Solution Approach 1:
The patent segments the large-scale sound collection area into multiple division regions, each associated with specific sound collection units. By dividing the overall sound collection state into manageable segments corresponding to individual units or groups of units, the system makes it feasible to visualize and analyze directivity characteristics for each segment rather than attempting to display the entire complex system as a single undifferentiated whole.
Data Source
AI summary
A display control apparatus includes an acquisition unit configured to acquire information about directivity of a sound collection unit that collects sound from a sound-collection target area, and a control unit configured to cause a display unit to display a display image in which an area image and a range image are superimposed on one another, the area image representing the sound-collection target area, and the range image having a shape expressing a sound collection range according to the directivity of the sound collection unit identified by the information acquired by the acquisition unit and representing loudness of sound in the sound collection range.