Wearable Microphone Directivity for Noise-Reduced Video Audio
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Solution Overview
Problem
Existing imaging devices struggle to capture high-quality audio during moving image shooting due to noise interference from lens drive and wind, necessitating the use of external devices for noise reduction.
Innovation Solution
An imaging apparatus with a sound collector worn on the user's head, featuring microphones arranged at predetermined positions, and a controller that processes audio data to enhance directivity and reduce noise, allowing for improved sound collection and monitoring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a built-in microphone is used in the imaging device, then the device structure is simple, but the audio quality is poor due to noise interference from lens drive and wind
Solution Approach 1:
The sound collection function is extracted from the imaging device and implemented in a separate wearable sound collector worn by the user. This separates the audio acquisition system from the imaging device, allowing the microphone to be positioned away from noise sources such as the lens drive mechanism while maintaining integration through wireless communication.
Solution Approach 2:
A wireless communication system serves as an intermediary between the wearable sound collector and the imaging device. The sound collector captures audio data independently and transmits it to the imaging device, mediating the audio acquisition process to avoid direct noise interference from the imaging device's mechanical components.
2Reliability
If an external sound collector is used, then the audio quality is improved, but the device complexity increases
Solution Approach 1:
The wearable sound collector is designed with multi-functionality, serving both as an audio collection device and a personal electronic device. It can collect sound for the imaging device while also functioning as a standalone audio recording or communication device, reducing the need for dedicated external equipment.
Solution Approach 2:
The sound collector integrates multiple functions including audio collection, wireless communication, and potentially audio processing capabilities into a single wearable device. This consolidation reduces the number of separate components needed while maintaining improved audio quality.
3Adaptability or versatility
If microphones are arranged on the user's head, then the sound collection coverage is improved, but the positioning precision requirement increases
Solution Approach 1:
The system dynamically adjusts audio processing parameters based on the detected position and orientation of the wearable sound collector. By changing processing parameters such as beamforming directions or noise cancellation settings according to the collector's spatial orientation, the system maintains accurate sound collection without requiring extremely precise manufacturing tolerances for microphone placement.
Data Source
AI summary
An imaging apparatus includes: an image sensor to capture an image of a subject to generate image data; a communicator to perform data communication with a sound collector; an audio processor to form a directivity in a sound collected by the sound collector; and a controller to control sound collection by the sound collector. The sound collector is worn on a head of a user, and includes a plurality of microphones arranged at respective predetermined positions on the head wearing the sound collector. The controller controls the communicator to receive, from the sound collector, audio data indicating the sound collected with the image sensor capturing the image, and controls the directivity in the received audio data by the audio processor according to the arrangement of the plurality of microphones on the head wearing the sound collector, and outputs controlled audio data to be recorded in association with generated image data.