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US 10,122,956 B2Granted
Beam forming for microphones on separate faces of a camera
AssigneeGoPro, Inc.
InventorsZhinian Jing, Joyce Rosenbaum
Life of this patent
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AssigneeGoPro, Inc.
InventorsZhinian Jing, Joyce Rosenbaum
Estimating the term…
A camera system capable of capturing images of an event in a dynamic environment includes two microphones configured to capture stereo audio of the event. The microphones are on orthogonal surfaces of the camera system. Because the microphones are on orthogonal surfaces of the camera system, the camera body can impact the spatial response of the two recorded audio channels differently, leading to degraded stereo recreation if standard beam forming techniques are used. The camera system includes tuned beam forming techniques to generate multi-channel audio that more accurately recreates the stereo audio by compensating for the shape of the camera system and the orientation of microphones on the camera system. The tuned beam forming techniques include optimizing a set of beam forming parameters, as a function of frequency, based on the true spatial response of the recorded audio signals.
A camera system comprising:
The camera system of 1, wherein the set of tuned beam forming parameters applied to the audio channels is associated with the linear distance between the first microphone and the second microphone across the surface of the camera body.
The camera system of 1, wherein the set of tuned beam forming parameters applied is associated with the linear distance between the first microphone and the second microphone through the body of the camera.
The camera system of 1, wherein the set of tuned beam forming parameters applied is based on maximizing a noise ratio between opposing hemispheres of the spatial response of the first and second audio signals.
The camera system of 1, wherein set of tuned beam forming parameters can be independently applied to separate frequency sub-bands of the audio channels based on the shape of the camera body and the frequency range of the sub-band.
The camera system of 1, wherein set of tuned beam forming parameters access gain and delay values stored in the system memory associated with the characteristics and shape of the camera body.
The camera system of 1, wherein the camera system determines the gain and delay to apply with the set of tuned beam forming parameters based on the characteristics and shape of the camera body.
An electronic device with audio recording capability comprising:
The electronic device of 8, wherein the set of tuned beam forming parameters applied to the audio channels is associated with the linear distance between the first microphone and the second microphone across the surface of the electronic device.
The electronic device of 8, wherein the set of tuned beam forming parameters applied is associated with the linear distance between the first microphone and the second microphone through the body of the electronic device.
The electronic device of 8, wherein tuning the set of beam forming parameters applied is based on maximizing a noise ratio between opposing hemispheres of the spatial response of the first and second audio signals.
The electronic device of 8, wherein set of tuned beam forming parameters can be independently applied to separate frequency sub-bands of the audio channels based on the shape of the camera body and the frequency range of the sub-band.
The electronic device of 8, wherein set of tuned beam forming parameters access gain and delay values stored in the system memory associated with the characteristics and shape of the camera body.
The electronic device of 8, wherein the camera system determines the gain and delay to apply with the set of tuned beam forming parameters based on the characteristics and shape of the camera body.
A method for generating stereo audio from at least two microphones on a camera body comprising:
The method of 15, wherein the set of tuned beam forming parameters applied to the audio channels is associated with the linear distance between the first microphone and the second microphone across the surface of the camera body.
The method of 15, wherein the set of tuned beam forming parameters applied is associated with the linear distance between the first microphone and the second microphone through the body of the camera.
The method of 15, wherein tuning the set of beam forming parameters applied is based on maximizing a noise ratio between opposing hemispheres of the spatial response of the first and second audio signals.
The method of 15, wherein set of tuned beam forming parameters can be independently applied to separate frequency sub-bands of the audio channels based on the shape of the camera body and the frequency range of the sub-band.
The method of 15, wherein set of tuned beam forming parameters access gain and delay values stored in the system memory associated with the characteristics and shape of the camera body.
Dependencies are inferred from the claim text.