Mobile Terminal Audio Beam Tracking via Camera and Motion Sensors
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Solution Overview
Problem
Mobile terminals face challenges in receiving optimal audio signals due to the complexity of positioning speakers and adapting to speaker movements, especially in environments with multiple speakers, which affects user convenience.
Innovation Solution
A mobile terminal equipped with a camera, motion sensor, and multiple microphones forms an audio beam based on camera images and motion information to determine speaker positions, allowing for adaptive signal processing and optimal audio signal reception, even when speakers move or the terminal itself moves.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the mobile terminal uses traditional omnidirectional audio reception, then it can receive audio signals from any direction, but it cannot achieve optimal audio signal quality when the speaker position changes
Solution Approach 1:
The audio beam is dynamically adjusted based on real-time camera images and motion sensor data. The beam direction changes adaptively to track speaker movement, ensuring optimal audio reception quality while maintaining directional focus. This resolves the contradiction by making the system both reliable (focused beam) and adaptable (moving beam).
Solution Approach 2:
The system uses camera images and motion sensor feedback to continuously update the audio beam direction. The feedback loop detects speaker position changes and adjusts the beam accordingly, ensuring the terminal maintains optimal audio signal quality even when speakers move during conversations.
2Loss of time
If the mobile terminal forms a directional audio beam quickly, then it can immediately receive optimal audio signals, but it may miss the initial moment when the speaker starts speaking
Solution Approach 1:
The system performs preliminary actions by pre-adjusting the audio beam direction based on camera-detected speaker position before the speaker starts speaking. Motion sensor data and image processing prepare the beam configuration in advance, ensuring immediate optimal audio reception from the moment the speaker begins talking.
Solution Approach 2:
The system cushions against potential speaker movement by continuously monitoring position via camera and motion sensors. It pre-adjusts the beam direction to anticipate speaker location changes, ensuring reliable audio capture without missing the initial speech moment or subsequent movements.
3Measurement precision
If the mobile terminal uses multiple sensors (camera, motion sensor) to track speaker position, then it can accurately follow speaker movement, but the device complexity increases
Solution Approach 1:
The camera and motion sensor serve multiple functions: camera captures both visual information for speaker identification and position, while motion sensor detects terminal orientation and movement. This multi-functionality reduces the need for dedicated audio-positioning sensors, lowering overall device complexity while maintaining high measurement precision.
Solution Approach 2:
The system merges data from camera images and motion sensor readings into a unified speaker position estimation. By combining visual position data with terminal motion data, the system achieves accurate speaker tracking using existing multi-functional components, avoiding the need for additional specialized sensors.
4Reliability
If the mobile terminal continuously updates the audio beam based on camera images, then it can track speaker movement accurately, but the energy consumption increases
Solution Approach 1:
The system performs periodic audio beam updates based on detected speaker movement thresholds rather than continuous updates. When the speaker position changes beyond a certain threshold, the beam is recalibrated; otherwise, the existing beam configuration is maintained. This periodic action ensures reliable audio reception while significantly reducing energy consumption compared to continuous updates.
Data Source
AI summary
The present invention relates to a mobile terminal, and a method for operating the same. According to an embodiment of the present invention, a method for operating a mobile terminal includes the steps of: forming an audio beam based on at least one of a photographed image from a camera and motion information from a motion sensor; receiving an audio signal from a speaker through a plurality of microphones; and processing the received audio signal based on the formed audio beam. Thus, the use convenience is improved.