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Audio and video signal synchronization device and method applicable to bubble acoustic research

A technology of video signal and sound signal, which is applied in TV, speech analysis, electrical components, etc., can solve the problems of incompetence of test personnel, high and low synchronization accuracy, and limitation of equipment selection, etc., and achieves easy measurement and calibration, less test investment, and easy implementation Effect

Active Publication Date: 2017-10-20
CHINA SHIP DEV & DESIGN CENT
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Problems solved by technology

Although this method is effective, there are two main problems: one is that all the equipment used are required to have a trigger function, which limits the selection of equipment and increases the test investment; the other is that there are difficulties in proofreading. There is a certain reaction delay after triggering the excitation, and the amount of delay determines the level of synchronization accuracy; the calibration of professional instruments has high technical requirements, and it is difficult for ordinary testers to do it

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  • Audio and video signal synchronization device and method applicable to bubble acoustic research
  • Audio and video signal synchronization device and method applicable to bubble acoustic research
  • Audio and video signal synchronization device and method applicable to bubble acoustic research

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Embodiment Construction

[0025] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0026] see figure 1 , an audio and video signal synchronization device suitable for bubble acoustic research, which includes a signal generator 1, a light emitting diode 2, a speaker 3, an output end 1.1 of the signal generator 1 is connected to a three-way joint 4, and the three-way joint 4 It is connected with the LED 2 and the speaker 3; the LED 2 is placed within the imaging range of the camera 5, and the speaker 3 is placed beside the hydrophone 6.

[0027] When the signal generator 1 is turned on, the output terminal 1.1 of the signal generator 1 will output a single-frequency sinusoidal vol...

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Abstract

The invention discloses an audio and video signal synchronization device applicable to bubble acoustic research, which comprises a signal generator, a light emitting diode and a loudspeaker. The output end of the signal generator is connected with a three-way joint; the three-way joint is connected with the light emitting diode and the loudspeaker; the light emitting diode is arranged in a shooting range of a camera; and the loudspeaker is arranged beside a hydrophone. The invention further provides an audio and video signal synchronization method applicable to bubble acoustic research. According to the audio and video signal synchronization device and method applicable to bubble acoustic research, which are disclosed by the invention, when sound and video acquisition equipment does not have a trigger function, high-accuracy synchronous testing of audio and video signals can still be implemented.

Description

technical field [0001] The invention belongs to the field of underwater acoustic testing, in particular to an audio and video signal synchronization device and method suitable for bubble acoustic research. Background technique [0002] Hydroacoustic test is the main research method of bubble acoustics. Since the acoustic characteristics of the bubbles are closely related to the shape, size and motion state of the bubbles, it is necessary to record the video and audio of the bubbles synchronously in the experiment. Usually, high-speed cameras are used to record the bubble shape, and hydrophones are used to record the bubble noise. How to accurately synchronize the signals collected by different devices is a key issue that affects the analysis results. [0003] At present, the most common way to solve the sound and video synchronization problem is to use a camera and a signal acquisition card with a trigger function. At the beginning of the test, a pulse signal is used to si...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/04G10L21/055
CPCG10L21/055H04N5/04
Inventor 苗天丞邢军华何雪松
Owner CHINA SHIP DEV & DESIGN CENT
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