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Sound source positioning method and apparatus

A sound source localization, sound source technology, applied in the direction of positioning, measuring devices, systems for determining direction or offset, etc., can solve the problem of not being able to determine the direction of the sound source.

Active Publication Date: 2016-11-16
ZHEJIANG DAHUA TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention provides a sound source localization method and device, which are used to solve the problem in the prior art that the direction (forward or reverse) of the sound source cannot be determined in real time according to the sound signal generated by the sound source

Method used

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  • Sound source positioning method and apparatus

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Embodiment

[0097] Assuming that the number of sound sensors installed on the dome camera is two, the two sound sensors are set on the side of the dome camera with the camera, and the direction of the two sound sensors is: perpendicular to the connection line of the two sound sensors, And, facing away from the diameter of the ball machine parallel to the line connecting the two sound sensors, the sound source localization method provided by the embodiment of the present invention is as follows: Figure 7 shown, including:

[0098] Step 501, using a first sound sensor to collect first sound time-domain data from a sound source and using a second sound sensor to collect second sound time-domain data from the sound source.

[0099] Specifically, the first sound sensor collects the first sound time-domain data from the sound source, and the second sound sensor collects the second sound time-domain data from the sound source; the way to obtain the sound time-domain data collected by the sound ...

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Abstract

The invention provides a sound source positioning method and apparatus. A plurality of independent sound sensors with identical characteristics are arranged on a ball machine in advance; and any two sound sensors are separated at a preset interval, wherein the preset interval is smaller than the diameter of the ball machine; and the orientations of sound sensors are identical. The method comprises: multiple sound sensors are used for collecting sound time-domain data from a same sound source; the sound time-domain data collected by each sound sensor are converted into sound frequency-domain data; according to the sound frequency-domain data corresponding to the sound sensor, a high frequency ratio value corresponding to the sound sensor is calculated; and according to the high frequency ratio values corresponding to all sound sensors, a direction of the sound source is determined, wherein the direction of the sound source is the orientation of the sound sensor or a direction opposite to the sound sensor. Therefore, a sound source can be localized by a ball machine in a 360-degree range; and the sound source positioning accuracy is improved.

Description

technical field [0001] The present invention relates to the technical field of sound source localization, in particular to a sound source localization method and device. Background technique [0002] Research in the field of video surveillance systems generally focuses on the analysis of video images. However, with the continuous improvement of security system requirements, the traditional single video surveillance cannot rotate to the corresponding position to capture the picture according to the occurrence of abnormal situations. Therefore, some scholars proposed to introduce audio in the monitoring system field, determine the position of the sound source by locating the sound source, and then adjust the rotation of the camera to capture the picture accurately and timely. [0003] At present, the sound source localization technology based on the microphone array has received more and more attention. The two-step directional algorithm based on the time difference estimation...

Claims

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Application Information

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IPC IPC(8): G01S5/22G10L25/90H04N7/18
CPCG01S5/22G10L25/90H04N7/185G10L2025/906G01S3/80G01S3/803G01S3/805G01S5/20G01S5/30G10L17/00G06V20/597G01S3/801G01S3/802G10L17/06G10L25/51H04R1/028H04R1/406H04R3/005
Inventor 高娅乔刚
Owner ZHEJIANG DAHUA TECH CO LTD
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