CN106211007B - 3D stereo surround system - Google Patents
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Abstract
The invention discloses a 3D stereo surround system, which comprises a phase matching module, a sampling module, an adder module, a frequency matching module and an output selection module, wherein the phase matching module is used for matching the phase of a stereo signal; the phase matching module performs phase matching on the received left channel audio signal and the received right channel audio signal; the sampling module samples the received audio signal after phase matching and outputs the sampled signal to the adder module; the adder module mixes the received audio signal output by the phase matching module with the signal sampled by the sampling module and outputs the mixed signal to the frequency matching module; the frequency matching module compensates and matches the high-frequency and low-frequency signals in the signals after the mixed signals output by the received adder module; and the output selection module is used for selectively outputting the received signals output and matched by the frequency matching module, the left channel audio signals and the right channel audio signals. The invention can realize the practical 3D stereo surround effect with excellent tone quality.
Description
Technical Field
The invention relates to the technical field of electronic products, in particular to a 3D stereo surround system.
Background
With the development of society, the progress of technology and the improvement of living standard, people also put forward higher requirements on sound quality, the traditional stereo no longer meets the requirements of people on watching television and films, and a sound restoration system capable of creating a real environment and enabling people to be personally on the scene is urgently needed. But to do so under budget and space limited conditions, 3D stereo surround systems have come to work. The reproduced sound field generated in this way is accompanied by acoustic effects that produce a sense of surround and a sense of spread (a sense of sound spreading away from the listener or reverberation) in addition to the sense of sound source direction of the original signal. When listening to surround sound, a listener can distinguish sounds from front, back, left and right, that is, surround sound enables a spatial sound source to be extended from a line to the whole horizontal plane or even a vertical plane, so that the spatial reverberation process of a presentation hall can be realistically reproduced with a more realistic presence.
3D stereo surround has the following advantages compared to the currently popular home cinema surround sound: the method has no strict requirements on the sound source, does not need coding, is suitable for small-space and close-range appreciation, and has low requirements on the software and hardware of the sound equipment. However, the current 3D stereo surround solution has the following disadvantages: one is the need for expensive expense; secondly, a set of complex systems is needed to realize, if a DSP is needed to realize the algorithm, A/D, D/A conversion is needed, and an MCU is needed to realize control, in the complex system, the sound is subjected to seed conversion and processing, so that the loss of details and the addition of various noises are inevitable, and the cost is high; thirdly, the adjustment is inconvenient, the surrounding depth and the surrounding width are inconvenient to adjust, the high frequency and the low frequency of the sound are inconvenient to adjust, and an extra EQ circuit is required to be added.
Disclosure of Invention
The present invention is directed to provide a 3D stereo surround system that is capable of realizing a practical 3D stereo surround effect with excellent sound quality, in view of the technical problems of the prior art.
In order to solve the problems proposed above, the technical scheme adopted by the invention is as follows:
A3D stereo surround system includes a phase matching module, a sampling module, an adder module, a frequency matching module, and an output selection module; the peripheral left channel audio signal and the peripheral right channel audio signal are respectively input to the phase matching module and the output selection module through the corresponding left channel and the corresponding right channel;
the phase matching module performs phase matching on the received left channel audio signal and the right channel audio signal and respectively outputs the audio signals after the phase matching to the sampling module and the adder module;
the sampling module samples the received audio signals after phase matching and outputs the sampled signals to the adder module;
the adder module mixes the received audio signal output by the phase matching module with the signal sampled by the sampling module and outputs the mixed signal to the frequency matching module;
the frequency matching module compensates and matches the high-frequency and low-frequency signals in the mixed signals output by the received adder module and outputs the matched signals to the output selection module;
and the output selection module is used for selectively outputting the received signals output and matched by the frequency matching module, the left channel audio signals and the right channel audio signals through corresponding left channels and right channels.
The phase matching module comprises an in-phase matching module and an anti-phase matching module, wherein a left channel audio signal is input to the in-phase matching module for in-phase matching, and a right channel audio signal is input to the anti-phase matching module for anti-phase matching.
The sampling module comprises a sampling unit and a depth adjusting module, wherein the sampling unit samples the audio signal after phase matching, takes background sound and middle and low frequency signals in the audio signal and outputs the signals to the adder module; the depth adjusting module adjusts the sampling amplitude of the sampling module.
The adder module comprises an in-phase adder and an anti-phase adder, wherein the in-phase adder adds the received left channel audio signal output by the in-phase matching module and the signal sampled by the sampling module, and mixes the two signals into a signal of a left channel audio signal; the inverting adder adds the received right channel audio signal output by the inverting matching module and the signal sampled by the sampling module, mixes the two signals into a signal of the right channel audio signal, and inverts the two signals while adding the two signals to restore the phase of the right channel audio signal to the phase before entering the phase matching module.
The frequency matching module comprises a first low-frequency matching module, a second low-frequency matching module, a first high-frequency matching module and a second high-frequency matching module, wherein the first low-frequency matching module and the second low-frequency matching module perform proper compensation enhancement on bass signals in the mixed signals; the first high frequency matching module and the second high frequency matching module perform proper compensation enhancement on the treble signal in the mixed signal.
The output selection module comprises a first selection switch and a second selection switch, and is used for switching the original signal and the processed signal, and outputting the original signal and the processed signal through a corresponding left sound channel and a corresponding right sound channel after the original signal and the processed signal are selected by the two switches.
Compared with the prior art, the invention has the beneficial effects that:
the invention is convenient and practical and is also convenient to adjust, does not need a DSP chip, software and A/D conversion, thus avoiding sound loss, ensuring pure tone quality and realizing the effect of realizing a 3D surrounding sound field by using two loudspeakers, and solving the problems of complexity, high cost, inconvenient adjustment and impure tone quality in the prior art. .
Drawings
Fig. 1 is a schematic diagram of a 3D stereo surround system of the present invention.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
Referring to fig. 1, the 3D stereo surround system according to the present invention includes a phase matching module 100, a sampling module 200, an adder module 300, a frequency matching module 400, and an output selection module 500, wherein a peripheral left channel audio signal and a peripheral right channel audio signal are respectively input to the phase matching module 100 and the output selection module 500 through corresponding left channel and right channel.
The phase matching module 100 is connected to the audio input signal and sampling module 200 and the adder module 300, and performs phase matching on the left channel audio signal and the right channel audio signal after receiving the left channel audio signal and the right channel audio signal. While the gain is kept unchanged, the left channel audio signal and the right channel audio signal are changed into two signals with opposite phases, and then the audio signals after phase matching are respectively output to the sampling module 200 and the adder module 300.
In the above, the phase matching module 100 includes an in-phase matching module 110 and an anti-phase matching module 120, wherein the left channel audio signal is input to the in-phase matching module 110 for in-phase matching, and the right channel audio signal is input to the anti-phase matching module 120 for anti-phase matching.
The sampling module 200 is connected to the phase matching module 100 and the adder module 300, respectively, and after receiving the left channel audio signal and the right channel audio signal output by the phase matching module 100 after phase matching, the sampling module 200 samples the left channel audio signal and the right channel audio signal and outputs the sampled signals to the adder module 300.
In the above, the sampling module 200 includes a sampling unit 210 and a depth adjusting module 220, wherein the sampling unit 210 samples two left channel audio signals and right channel audio signals with opposite phases, takes background sound and middle and low frequency signals in the left channel audio signals and the right channel audio signals, and outputs the signals to the adder module 300; the depth adjustment module 220 can adjust the sampling amplitude of the sampling module 210, so that the depth and the width of the 3D surround can be conveniently adjusted.
The adder module 300 is respectively connected to the phase matching module 100, the sampling module 200, and the frequency matching module 400, and mixes the received audio signal output by the phase matching module 100 and the signal sampled by the sampling module 200, and outputs the mixed signal to the frequency matching module 400.
In the above, the adder module 300 includes an in-phase adder 310 and an anti-phase adder 320, and the in-phase adder 310 adds the left channel audio signal received from the in-phase matching module 110 to the signal sampled by the sampling module 200, and mixes the two signals into a signal of a left channel audio signal. The inverting adder 320 adds the right channel audio signal received from the inverting matching module 120 and the signal sampled by the sampling module 200, mixes the two signals into one signal of the right channel audio signal, and inverts the two signals while adding the two signals to restore the phase of the right channel audio signal to the phase before entering the phase matching module 100. The inverting adder 320 not only serves as an adder but also serves as phase matching, and can restore the phase of the right-channel audio signal.
The frequency matching module 400 is connected to the adder module 300 and the output selection module 500, respectively, receives the mixed signal output by the adder module 300, compensates and matches the high and low frequency signals in the mixed signal, and outputs the matched signal to the output selection module 500.
In the above, the frequency matching module 400 includes a first low-frequency matching module 410, a second low-frequency matching module 420, a first high-frequency matching module 411 and a second high-frequency matching module 421, wherein the first low-frequency matching module 410 and the second low-frequency matching module 420 perform appropriate compensation and enhancement on the bass signal in the mixed signal according to the audio characteristics of the whole system, so as to increase the bass thickness and shock. The first high frequency matching module 411 and the second high frequency matching module 421 perform appropriate compensation enhancement on the treble signal in the mixed signal according to the audio characteristics of the entire system, so that it is possible to increase treble clarity, penetration, and detail restitution.
The output selection module 500 is connected to the frequency matching module 400, the left and right channel input, and the left and right channel output, respectively, and performs selective output on the received signal matched by the frequency matching module 400, the left channel audio signal, and the right channel audio signal, that is, performs selective output on the original signal and the signal after 3D processing through the corresponding left channel and right channel.
In the above, the output selection module 500 includes the first selection switch 510 and the second selection switch 520, which are used to switch the original signal and the processed signal, that is, the user selects whether to listen to the original sound or the 3D surround sound according to his/her preference and listening environment, and the original sound or the 3D surround sound is output by the left channel and the right channel after being selected by the first selection switch 510 and the second selection switch 520, respectively.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.
Claims (6)
1. A 3D stereo surround system characterized by: the device comprises a phase matching module, a sampling module, an adder module, a frequency matching module and an output selection module, wherein the adder module is respectively connected with the phase matching module, the sampling module and the frequency matching module; the peripheral left channel audio signal and the peripheral right channel audio signal are respectively input to the phase matching module and the output selection module through the corresponding left channel and the corresponding right channel;
the phase matching module performs phase matching on the received left channel audio signal and the right channel audio signal, changes the left channel audio signal and the right channel audio signal into two signals with opposite phases while keeping the gain unchanged, and respectively outputs the audio signals after phase matching to the sampling module and the adder module;
the sampling module samples the received audio signals after phase matching and outputs the sampled signals to the adder module;
the adder module mixes the received audio signal output by the phase matching module with the signal sampled by the sampling module and outputs the mixed signal to the frequency matching module;
the frequency matching module compensates and matches the high-frequency and low-frequency signals in the mixed signals output by the received adder module and outputs the matched signals to the output selection module;
and the output selection module is used for selectively outputting the received signals output and matched by the frequency matching module, the left channel audio signals and the right channel audio signals through corresponding left channels and right channels.
2. A 3D stereo surround system according to claim 1, characterized by: the phase matching module comprises an in-phase matching module and an anti-phase matching module, wherein a left channel audio signal is input to the in-phase matching module for in-phase matching, and a right channel audio signal is input to the anti-phase matching module for anti-phase matching.
3. A 3D stereo surround system according to claim 1, characterized by: the sampling module comprises a sampling unit and a depth adjusting module, wherein the sampling unit samples the audio signal after phase matching, takes background sound and middle and low frequency signals in the audio signal and outputs the signals to the adder module; the depth adjusting module adjusts the sampling amplitude of the sampling module.
4. A 3D stereo surround system according to claim 2, characterized by: the adder module comprises an in-phase adder and an anti-phase adder, wherein the in-phase adder adds the received left channel audio signal output by the in-phase matching module and the signal sampled by the sampling module to generate a left channel audio signal; the inverting adder adds the received right channel audio signal output by the inverting matching module and the signal sampled by the sampling module, and performs inverting while adding the right channel audio signal and the signal, restores the phase of the right channel audio signal to the phase before entering the phase matching module, and generates a right channel audio signal.
5. A 3D stereo surround system according to claim 1, characterized by: the frequency matching module comprises a first low-frequency matching module, a second low-frequency matching module, a first high-frequency matching module and a second high-frequency matching module, wherein the first low-frequency matching module and the second low-frequency matching module perform proper compensation enhancement on bass signals in the mixed signals; the first high frequency matching module and the second high frequency matching module perform proper compensation enhancement on the treble signal in the mixed signal.
6. A 3D stereo surround system according to claim 1, characterized by: the output selection module comprises a first selection switch and a second selection switch, and is used for switching the original signal and the processed signal, and outputting the original signal and the processed signal through a corresponding left sound channel and a corresponding right sound channel after the original signal and the processed signal are selected by the two switches.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108200003B (en) * | 2016-12-08 | 2021-05-28 | 武汉斗鱼网络科技有限公司 | Audio data mixing processing method and device |
| CN107040849A (en) * | 2017-04-27 | 2017-08-11 | 广州天逸电子有限公司 | A kind of method and device for improving three-dimensional phonoreception |
| CN108810737B (en) * | 2018-04-02 | 2020-11-27 | 海信视像科技股份有限公司 | Signal processing method and device and virtual surround sound playing equipment |
| CN108566591B (en) * | 2018-06-29 | 2024-02-27 | 宁波东源音响器材有限公司 | Audio processing circuit, sound system and method for playing stereo or mixed sound |
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| CN1135120A (en) * | 1995-02-27 | 1996-11-06 | 松下电器产业株式会社 | Bass enhancement circuit |
| CN101015230A (en) * | 2004-09-06 | 2007-08-08 | 皇家飞利浦电子股份有限公司 | Audio signal enhancement |
| CN103684301A (en) * | 2012-08-30 | 2014-03-26 | 蒂雅克股份有限公司 | Amplifier unit and mobile electronic device provided with the amplifier unit |
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| CN1135120A (en) * | 1995-02-27 | 1996-11-06 | 松下电器产业株式会社 | Bass enhancement circuit |
| CN101015230A (en) * | 2004-09-06 | 2007-08-08 | 皇家飞利浦电子股份有限公司 | Audio signal enhancement |
| CN103684301A (en) * | 2012-08-30 | 2014-03-26 | 蒂雅克股份有限公司 | Amplifier unit and mobile electronic device provided with the amplifier unit |
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