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

A sound field and filter module technology, applied in stereo system, dual channel system, sensor components, etc., can solve the problems of high cost, complex structure of virtual surround sound system, etc., and achieve the effect of wide sound field

Active Publication Date: 2022-02-08
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

Method used

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

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Embodiment 1

[0063] like figure 1, The present embodiment provides a method for expansion of virtual surround sound field, the extended virtual surround sound field method comprises:

[0064] S1: acquiring the stereo signal, the stereo signal comprising a left channel and a right channel signal. Increasing the delay set on the left or right stereo channels, so that the setting does not increase the delay of the channel corresponding to the channel sounds corresponding to first-set ratio is increased voice delay.

[0065] Specifically, human binaural positioning means by the time the sound source position is reaching both ears, and the sound pressure level determined tone; the maximum time difference between the first sound source with the direct sound reaching ears of 0.44ms ~ 0.5ms, 20Hz ~ 200Hz bass mainly by human ears positioning phase, 0.3kHz ~ 4kHz Alto positioned mainly by sound pressure difference, the higher treble positioned mainly on the time difference, as compared with a single au...

Embodiment 2

[0073] like figure 2 , The present embodiment provides a virtual surround sound field module 1, the module 1 virtual surround sound field comprising:

[0074] Delay module 11, a first filter module 12, a second filter module 13, the third filtering module 14, a fourth filtering module 15, a first merge module 16 and the second merge module 17.

[0075] like figure 2 Shown, the delay module 11 provided on the left or right stereo channel, sound field for the offset.

[0076] In particular, in the present embodiment, the delay module 11 provided on the right stereo channel, in actual use, may be disposed on the left channel, in the present embodiment is not limited thereto.

[0077] like figure 2 Shown, the first filter module 12 is connected to the left stereo channel, the first filter module 12 allows the convex portion left audio band corresponding partial more left.

[0078] like figure 2 As shown in, the second filter module 13 is connected to the left stereo channel, the secon...

Embodiment 3

[0089] like Figure 11 , The present embodiment provides a system for virtual surround sound field expansion of the virtual surround sound field expansion system comprising:

[0090] The first audio processing module 2, according to a second embodiment of the virtual sound field surrounding the module 1, the first speaker and the second speaker 4 3.

[0091] like Figure 11 As shown in the first audio processing module receives an audio signal to be played 2, after the output stereo signal is processed.

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Abstract

The present invention provides a sound field virtual surround module and a system and method for expanding sound field virtual surround, including: a delay module, a first filter module, a second filter module, a third filter module, a fourth filter module, and a first merge module And the second merge module; increase the set delay on the left or right channel of the stereo, so that the sound does not sound like the channel with the delay arrives first; For right-to-left and right-to-right filters, the amplitude-frequency and phase-frequency characteristics of the filter are basically symmetrical, but the amplitude of the channel without delay in the low-frequency part is smaller than that of the channel with delay, so that the sound in the low-frequency part is added Delayed channel deflection. The sound field virtual surround module and the system and method for expanding the sound field virtual surround of the present invention process and play audio data on the basis of the stereo sound played by two earphones or speakers so that the sound sounds wider and achieves virtual surround sound Effect.

Description

Technical field [0001] The present invention relates to sound processing, and more particularly to a virtual surround sound field module, system and method for virtual surround sound field expansion. Background technique [0002] Stereo (Stereo) refers to a stereoscopic sound. Because there is a sound source to determine the spatial location of the sound source has a definite direction, people with hearing ability to discern the orientation of the sound source. In particular, when a plurality of sound sources are sounded simultaneously, it can be perceived by ear position distribution of each sound source in space. Compared with mono, stereo, it has the following advantages: (1) having a sense of direction and a sense of distribution of each sound source; (2) improve the clarity and intelligibility of the information; (3) increase the presence of program, level and a sense of transparency. [0003] Virtual surround sound system is based on a two-channel stereo, and without increa...

Claims

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Application Information

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Patent Type & Authority Patents(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