Method, apparatus and system for microphone array calibration
A technology of microphone array and microphone, which is applied in voice analysis, instruments, microphones, etc., and can solve problems such as multiple noises
Inactive Publication Date: 2015-09-23
THOMSON LICENSING SA
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However, multiple microphones also create more noise by themselves
Furthermore, this technique does not use system and configuration parameters of known audio signals to achieve noise cancellation as described in this paper
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[0017] The present invention advantageously provides a method, device and system for microphone array correction. Although the present invention is mainly described in the context of in-store retail advertising network environment and advertising content distribution (especially, checkout application), the specific embodiments of the present invention are not considered to limit the scope of the present invention. Those skilled in the art will understand and will know from the teaching of the present invention that the concept of the present invention can be advantageously used in any content distribution or communication network to calibrate the microphone array as described herein.
[0018] The functions of the various elements shown in the figure can be provided by using dedicated hardware as well as hardware capable of executing software in combination with appropriate software. When provided by a processor, the functions may be provided by a single dedicated processor, by a ...
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A method, apparatus and system for microphone array calibration include recording audio using at least two microphones, which comprise an array of microphones, using a target microphone of the array of microphones, determining an attenuation factor for audio originating from respective locations of other microphones of the array of microphones, using a target microphone of the array of microphones, determining a delay factor for audio originating from respective locations of other microphones of the array of microphones and implementing the determined attenuation factor and delay factor for removing audio originating from respective locations of the other microphones of the array of microphones from an audio signal captured by the target microphone. The method, apparatus and system then further include removing audio originating from respective locations of the other microphones of the array of microphones from an audio signal captured by the target microphone using beam-forming techniques.
Description
Technical field [0001] The present invention generally relates to microphone correction, and in particular to a method, device and system for removing environmental noise from microphone signals in a microphone array. Background technique [0002] Noise suppression is often required in many communication systems and content distribution devices to improve communication quality and media understanding by suppressing noise. A variety of techniques can be used to achieve noise suppression, some of which can be classified as single microphone technology and microphone array technology. [0003] Array microphone noise reduction technology uses multiple microphones located at different positions, which are separated from each other by a minimum distance to form a beam. Generally, the beam is used to obtain speech, which is then used to reduce the amount of noise obtained outside the beam. Thus, the array microphone technology can suppress non-static noise. However, multiple microphone...
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IPC IPC(8): G10L21/0208
CPCG10L2021/02166H04R3/005H04R29/005G10L21/0224H04R2430/23H04R2410/01G10L2021/02087
Inventor 斯特拉蒂斯·约安尼季斯格雷格里·查尔斯·赫林克里斯托夫·迪奥特
Owner THOMSON LICENSING SA