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Sound field virtual surround module, and system and method for expanding sound field virtual surround

A sound field and filter module technology, applied in the field of sound processing, can solve problems such as high cost and complex structure of virtual surround sound system, and achieve the effect of wide sound field

Active Publication Date: 2020-09-04
菁音电子科技(上海)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide a sound field virtual surround module, a system and a method for expanding the sound field virtual surround, which are used to solve the problem of complex structure and high cost of the virtual surround sound system in the prior art. question

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  • Sound field virtual surround module, and system and method for expanding sound field virtual surround
  • Sound field virtual surround module, and system and method for expanding sound field virtual surround
  • Sound field virtual surround module, and system and method for expanding sound field virtual surround

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Embodiment 1

[0063] Such as figure 1As shown, this embodiment provides a method for expanding the virtual surround of the sound field, and the method for expanding the virtual surround of the sound field includes:

[0064] S1: Obtain a stereo signal, where the stereo signal includes a left channel signal and a right channel signal. Adds a set delay to the left or right channel of the stereo, so that the sound corresponding to the channel without the set delay appears to arrive before the sound corresponding to the channel with the set delay added.

[0065] Specifically, the binaural effect means that the location of the sound source is determined by the time when the sound reaches both ears, the sound pressure intensity and the timbre; the maximum time difference between the direct sound arriving at both ears from the same sound source is 0.44ms~0.5ms, The bass from 20Hz to 200Hz is mainly positioned by the phase difference between the two ears, the midrange from 0.3kHz to 4kHz is mainly ...

Embodiment 2

[0073] Such as figure 2 As shown, the present embodiment provides a sound field virtual surround module 1, and the sound field virtual surround module 1 includes:

[0074] The delay module 11 , the first filtering module 12 , the second filtering module 13 , the third filtering module 14 , the fourth filtering module 15 , the first combining module 16 and the second combining module 17 .

[0075] Such as figure 2 As shown, the delay module 11 is set on the left channel or the right channel of the stereo, and is used for offsetting the sound field.

[0076] Specifically, in this embodiment, the delay module 11 is set on the right channel of the stereo, but may be set on the left channel in actual use, which is not limited to this embodiment.

[0077] Such as figure 2 As shown, the first filter module 12 is connected to the left channel of the stereo, and the raised part in the first filter module 12 can shift the corresponding frequency band of the left sound to the left....

Embodiment 3

[0089] Such as Figure 11 As shown, this embodiment provides a system for expanding the virtual surround of the sound field, and the system for expanding the virtual surround of the sound field includes:

[0090] The first audio processing module 2 , the sound field virtual surround module 1 of the second embodiment, the first loudspeaker 3 and the second loudspeaker 4 .

[0091] Such as Figure 11 As shown, the first audio processing module 2 receives an audio signal to be played, and outputs a stereo signal after processing.

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Abstract

The invention provides a sound field virtual surround module and a system and a method for expanding sound field virtual surround. The sound field virtual surround module comprises a delay module, a first filtering module, a second filtering module, a third filtering module, a fourth filtering module, a first merging module and a second merging module. A set delay is added on a left channel or a right channel of the stereo, so that the channel without the delay is earlier when the sound is heard; then filters from left to left, from left to right, from right to left and from right to right areadded into the two sound channels, the amplitude-frequency and phase-frequency characteristics of the filters are basically symmetrical, but the amplitude of the sound channel which is not delayed atthe low-frequency part is smaller than that of the sound channel which is delayed, so that the sound of the low-frequency part deflects towards the sound channel which is delayed. According to the sound field virtual surround module and the system and the method for expanding the sound field virtual surround, on the basis of stereophonic sound played by two earphones or loudspeaker boxes originally, data of the played audio is processed, the sound field is wider when the sound is heard, and a virtual surround effect is achieved.

Description

technical field [0001] The invention relates to the field of sound processing, in particular to a sound field virtual surround module, a system and a method for expanding the sound field virtual surround. Background technique [0002] Stereo (Stereo) refers to the sound with three-dimensional effect. Because the sound source has a definite spatial position and the sound has a definite direction source, people's sense of hearing has the ability to distinguish the direction of the sound source. Especially when there are multiple sound sources making sound at the same time, people can perceive the position distribution of each sound source in the space by hearing. Compared with mono, stereo has the following advantages: (1) has a sense of orientation and distribution of each sound source; (2) improves the clarity and intelligibility of information; (3) improves the presence and level of the program sense and transparency. [0003] The virtual surround sound system is based o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04S1/00H04R3/00
CPCH04S1/007H04R3/00
Inventor 黄正何小学林骏
Owner 菁音电子科技(上海)有限公司