CN104639829A - Sound localization video tracking system - Google Patents
Sound localization video tracking system Download PDFInfo
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- CN104639829A CN104639829A CN201410711440.8A CN201410711440A CN104639829A CN 104639829 A CN104639829 A CN 104639829A CN 201410711440 A CN201410711440 A CN 201410711440A CN 104639829 A CN104639829 A CN 104639829A
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- controller
- auditory localization
- video frequency
- following system
- frequency following
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Abstract
The invention belongs to the field of sound control and relates to a sound localization video tracking system. The sound localization video tracking system is characterized by comprising two acquisition devices, an encoding chip, a controller, a keyboard, a display and two step motors. The acquisition devices are connected with the encoding chip; the encoding chip is connected with the controller; the keyboard is connected with the controller; the controller is connected with the display; the controller is connected with the step motors; the acquisition devices are sensors; after a sound source is localized through the controller, the step motors are controlled to rotate; when the sound source moves, a camera is automatically kept tracking. The sound localization video tracking system is simple in structure and easy to operate.
Description
Technical field
the invention belongs to acoustic control field, particularly relate to a kind of auditory localization video frequency following system.
Background technology
Along with the continuous progress of science and technology, increasing smart machine has entered into the life of people, brings facility to the life of people, and in daily life, audio source tracking location technology has a wide range of applications.Such as in video conference, auditory localization is used to detect teller's
Position, and automatically adjust camera rotational angle, make it aim at talker; In stage performance, auditory localization is followed the tracks of camera and is automatically kept pointing to host or leading role; In security protection safeguard system, auditory localization technology can make monitoring camera in the moment of the guarded region generation sound in alignment with sound source position, and keeps the tracking to moving sound.Now common microphone auditory localization algorithm, its general principle is the time difference of the microphone arriving two diverse locations according to signal, estimate the range difference that signal arrives two diverse location microphones, when making to carry out auditory localization in this way, at least to use three microphones, just can complete one-time positioning operation.In order to realize more accurate auditory localization, also often adopt array technique, by multiple microphone composition linear array, or square formation collection signal carries out auditory localization.But the algorithm of this location technology is comparatively complicated.
Summary of the invention
The present invention is intended to solve the problem, and provides a kind of auditory localization video frequency following system.
A kind of auditory localization video frequency following system, is characterized in that comprising harvester, coding chip, controller, keyboard, display and stepping motor; Wherein harvester is connected with coding chip; Coding chip is connected with controller; Keyboard is connected with controller; Controller is connected with display; Controller is connected with stepping motor; Harvester is provided with two; Stepping motor is provided with two.
A kind of auditory localization video frequency following system of the present invention, is characterized in that described harvester is microphone.
A kind of auditory localization video frequency following system of the present invention, is characterized in that described controller adopts the FPGA device of EP3C146F484.
A kind of auditory localization video frequency following system of the present invention, is characterized in that described coding chip adopts UDA1341 coding chip.
A kind of auditory localization video frequency following system of the present invention, is characterized in that the sampling ratio of described coding chip is 128.
A kind of auditory localization video frequency following system of the present invention, is characterized in that described display is LCD liquid crystal display.
A kind of auditory localization video frequency following system of the present invention, is characterized in that the size of described display is 16 × 2.
A kind of auditory localization video frequency following system of the present invention, by two microphones as transducer, selects FPGA as controller, after location is realized to sound source, and control step electric machine rotation.When sound source position is moved, camera can be made automatically to keep following the tracks of.Auditory localization video frequency following system structure of the present invention is simple, is easy to operation.
Embodiment
A kind of auditory localization video frequency following system, is characterized in that comprising harvester, coding chip, controller, keyboard, display and stepping motor; Wherein harvester is connected with coding chip; Coding chip is connected with controller; Keyboard is connected with controller; Controller is connected with display; Controller is connected with stepping motor; Harvester is provided with two; Stepping motor is provided with two.
A kind of auditory localization video frequency following system of the present invention, described harvester is microphone.Described controller adopts the FPGA device of EP3C146F484.Described coding chip adopts UDA1341 coding chip, uses UDA1341 chip as the process chip of front audio signal acquisition circuit, uses two highly sensitive microphones as the transducer of audio signal.Two microphones are towards same direction, and spacing 0.5 m is parallel to be placed.Microphone needs to demarcate before use, and ensure that microphone is when same position accepts same signal, the amplitude of its signal received is consistent.Two two-phase stepping motors are used to control shooting head-turned angle.In order to record data, with the addition of the FLASH memory of 4 Mb in systems in which, using the liquid crystal of 16 × 2 of a slice band character library for showing locating information.For ensureing that the sight line of camera is not by the interference of Environment Obstacles thing, camera have certain height when placing, and generally higher than the placing height of microphone, therefore needs the angle of two stepping motor adjustment cameras, an adjustment horizontally rotates angle, and another adjusts the angle of pitch.The sampling ratio of described coding chip is 128.Described display is LCD liquid crystal display.The size of described display is 16 × 2.First system carries out initialization operation when starting, and is arranged working method and the running parameter of chip by the L3 bus interface of UDAl1341 chip.Audio signal received by two microphones, after audio signal sample processing of circuit, converts discrete signal to, delivers in FPGA and process.Controller judges two time differences of microphones to signal and the decay of signal power according to the sequence of the signal received, and then calculates the position coordinates of sound source.Control step electric machine rotation, makes camera aim at sound source.The position coordinates of the sound source recorded shows at LCD by system simultaneously.User can set up the coordinate system of location in use according to concrete environment for use.When system start-up initialisation, the coordinate of the position of two microphones and the position of camera is input in system by matrix keyboard after determining coordinate system.
Claims (7)
1. an auditory localization video frequency following system, is characterized in that comprising harvester, coding chip, controller, keyboard, display and stepping motor; Wherein harvester is connected with coding chip; Coding chip is connected with controller; Keyboard is connected with controller; Controller is connected with display; Controller is connected with stepping motor; Harvester is provided with two; Stepping motor is provided with two.
2. a kind of auditory localization video frequency following system as claimed in claim 1, is characterized in that described harvester is microphone.
3. a kind of auditory localization video frequency following system as claimed in claim 1, is characterized in that described controller adopts the FPGA device of EP3C146F484.
4. a kind of auditory localization video frequency following system as claimed in claim 1, is characterized in that described coding chip adopts UDA1341 coding chip.
5. a kind of auditory localization video frequency following system as claimed in claim 4, is characterized in that the sampling ratio of described coding chip is 128.
6. a kind of auditory localization video frequency following system as claimed in claim 1, is characterized in that described display is LCD liquid crystal display.
7. a kind of auditory localization video frequency following system as claimed in claim 6, is characterized in that the size of described display is 16 × 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410711440.8A CN104639829A (en) | 2014-12-01 | 2014-12-01 | Sound localization video tracking system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410711440.8A CN104639829A (en) | 2014-12-01 | 2014-12-01 | Sound localization video tracking system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104639829A true CN104639829A (en) | 2015-05-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410711440.8A Pending CN104639829A (en) | 2014-12-01 | 2014-12-01 | Sound localization video tracking system |
Country Status (1)
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| CN (1) | CN104639829A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110992971A (en) * | 2019-12-24 | 2020-04-10 | 达闼科技成都有限公司 | Method for determining voice enhancement direction, electronic equipment and storage medium |
-
2014
- 2014-12-01 CN CN201410711440.8A patent/CN104639829A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110992971A (en) * | 2019-12-24 | 2020-04-10 | 达闼科技成都有限公司 | Method for determining voice enhancement direction, electronic equipment and storage medium |
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Legal Events
| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150520 |
|
| WD01 | Invention patent application deemed withdrawn after publication |