Acoustic AR Service via Inaudible Sound Extraction
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Solution Overview
Problem
Conventional Augmented Reality (AR) services in mobile communication terminals rely on acquiring real images, which limits their functionality when real images cannot be detected or acquired, restricting their use in certain locations.
Innovation Solution
An apparatus and method that utilize sound signals with both audible and inaudible frequency bands to provide AR services by extracting additional information from the inaudible frequency band and displaying it as a service screen, enabling AR service delivery without the need for real image acquisition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional AR technique uses real image acquisition and detection, then additional information can be provided in current position, but AR service cannot be provided when real image cannot be acquired or features cannot be detected
Solution Approach 1:
The patent replaces the optical/image-based detection system with an acoustic detection system. Instead of using a camera to capture real images and detect visual features, the system uses a microphone to receive sound signals and detect acoustic features. This substitution enables AR services to function in locations where visual features cannot be captured but acoustic features are available, thereby improving service availability and adaptability.
2Loss of information
If AR service relies on visual features, then real image merging can be achieved, but service is restricted in locations where visual features are difficult to capture
Solution Approach 1:
The patent makes the AR system universal by enabling it to function with multiple types of input: both traditional visual inputs and acoustic inputs. The system can process sound signals to extract acoustic features and provide additional information services, making it adaptable to various environments including those where visual features are unavailable, thus achieving multi-functional operation.
3Measurement precision
If conventional AR uses GPS and gyroscope for position detection, then position information can be provided, but additional information is not provided when real image cannot be acquired
Solution Approach 1:
The patent introduces acoustic features as an intermediary element that bridges the gap between position detection and information provision. When visual features are unavailable, the system uses acoustic features extracted from sound signals to enable additional information provision, working in conjunction with GPS and gyroscope data to maintain service reliability.
Data Source
AI summary
A method and an apparatus are provided for providing additional information service in a mobile communication terminal. A microphone receives a sound signal including an audible frequency band and an inaudible frequency band. Additional information related to the service is detected in the inaudible frequency band included in the sound signal. The detected additional information is extracted from the sound signal. Data for providing the service is acquired based on the extracted additional information. A service screen is displayed based on the acquired data.