A following type dynamic stereo system for audio-visual devices

A technology of stereo system and audio-visual equipment, applied in the direction of stereo system, electrical components, etc., which can solve the problems of loudspeaker system installation, debugging difficulty, use restriction and inconvenience, and increased debugging workload

Inactive Publication Date: 2019-07-23
SUZHOU SOUND TECH TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Non-array stereo equipment cannot change the directivity, and array stereo equipment must change the structure of each speaker if it wants to change the pointing angle of the speaker, which not only brings great inconvenience to the installation and d

Method used

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  • A following type dynamic stereo system for audio-visual devices
  • A following type dynamic stereo system for audio-visual devices
  • A following type dynamic stereo system for audio-visual devices

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] see image 3 As shown, the optical camera can be used as the capture device of the face position, and the optical camera is placed at the midpoint of the speaker array. Use OpenCV to perform face recognition on the picture captured by the optical camera. When multiple speakers are arranged in a horizontal row, the face position acquisition system calculates the deflection angle θ of the speaker array beam by the following method 0 and the delayed signal τ of each acoustic array element n :

[0052] Take the image center of the audio-visual equipment as the origin of the coordinates, the coordinates of the collected face position are x, and the coordinates of the collected edge of screen 1 are x 0 , The average distance between the face collected by the depth sensor and the speaker array system is d 0, the spatial length of the actual image 2 corresponding to the collected picture 1 is l 0 , the distance between the centers of adjacent acoustic array elements is d; ...

Embodiment 2

[0058] The laser radar is used as the capture device of the face position, so that the laser radar detects and collects the feature quantities such as the face position and speed, and after proper processing, the distance and azimuth of the face can be directly obtained, and then through the application example 1 The formula calculation can get the delay signal τ required by each loudspeaker acoustic array element n .

[0059] Adopting the follow-up dynamic stereo system of the present invention can make the audience break through the limitation of space, and can enjoy the same audio-visual experience no longer limited to the front of the speaker equipment or the sound array. Listeners can move freely over a larger area while enjoying the same listening experience as when stationary. When it is used in the tour explanation or introduction activities of scenes such as audio-visual corridors or exhibition galleries, the audience can obtain a consistent audio-visual experience w...

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Abstract

The invention discloses a following type dynamic stereo system for audio-visual equipment. The following type dynamic stereo system comprises a loudspeaker array system, a face position acquisition system and a loudspeaker delay system, the face position obtaining system can recognize a face and obtain the position of the face. The coordinate position of the face, the deflection angle of the directional acoustic wave beam in the loudspeaker array system and the delay signal difference value of the adjacent acoustic array elements can be obtained through preset program calculation, the directivity of the acoustic wave beam is changed through the loudspeaker delay system, and therefore dynamic following of the sound to the face is achieved.

Description

technical field [0001] The invention relates to a follow-up dynamic stereo system for audio-visual equipment. Background technique [0002] At present, there are many stereo devices, and there are mainly three types of devices that are used more: one is to use sound arrays to form stereo beams in a fixed direction; the other is to use left and right two-channel stereo speakers; the third is to use multi-channel output Surround speakers . [0003] Although the current stereo audio-visual equipment is widely used, no matter which one of the above three stereo equipment methods, it can only have a good stereo effect in a fixed angle or area, that is to say, the audience must be in a designated location. Only in the designated area can enjoy a better listening effect; when the listener leaves the designated area or walks in the area, the listening effect will be greatly reduced, and even a poor audio-visual experience will be obtained. [0004] Existing patents: combined line ...

Claims

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Application Information

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IPC IPC(8): H04S7/00
CPCH04S7/303
Inventor 唐俊白宇田
Owner SUZHOU SOUND TECH TECH CO LTD
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