CN113055789B

CN113055789B - Single sound channel sound box, method and system for increasing surround effect in single sound channel sound box

Info

Publication number: CN113055789B
Application number: CN202110180729.1A
Authority: CN
Inventors: 袁园
Original assignee: Anker Innovations Co Ltd
Current assignee: Anker Innovations Co Ltd
Priority date: 2021-02-09
Filing date: 2021-02-09
Publication date: 2023-03-24
Anticipated expiration: 2041-02-09
Also published as: CN113055789A

Abstract

The invention provides a single sound track sound box, a method and a system for increasing surround effect in the single sound track sound box, wherein the single sound track sound box comprises: the first audio mixing module is used for acquiring a first channel signal and a second channel signal, and performing audio mixing processing on the first channel signal and the second channel signal to generate a main audio signal; a difference processing module, configured to perform difference processing on the first channel signal and the second channel signal; the tuning module is used for adjusting the first channel signal and the second channel signal after the difference value processing so as to obtain a surround audio signal; the second sound mixing module is used for carrying out sound mixing processing on the surround audio signal and the main audio signal; and the loudspeaker is used for outputting the audio signal after the sound mixing processing to form a sound field with a surround effect. By the scheme, the surround effect is added in the single sound channel sound box, and the spatial sense and the layering sense of the single sound channel sound box are improved.

Description

Single sound channel sound box, method and system for increasing surround effect in single sound channel sound box

Technical Field

The invention relates to the technical field of sound boxes, in particular to a single sound channel sound box, and a method and a system for increasing a surround effect in the single sound channel sound box.

Background

Currently, mono speakers are basically configured such that left and right channels are directly mixed together and then output to a speaker (i.e., a loudspeaker). The left and right channel signals are sent to the same loudspeaker, so the sound field is very narrow, and the sound is similar to that emitted from a single point. In a single sound channel sound box, only the front and back positions, tone quality and volume of sound can be sensed, and the sound cannot be sensed to move transversely from left to right and the like, so that the surround effect is lacked. In addition, the current mainstream surround technology, such as Dolby (Dolby) or digital cinema system (DTS), is directed to a system with more than two channels, and lacks a technology for performing surround effect on a mono speaker.

Therefore, the present invention provides a method for increasing surround effect in a mono audio box, a mono audio box and a system thereof, so as to solve the above technical problems.

Disclosure of Invention

In view of the deficiencies of the prior art, the present invention provides, in one aspect, a mono speaker, comprising:

the first audio mixing module is used for acquiring a first channel signal and a second channel signal, and performing audio mixing processing on the first channel signal and the second channel signal to generate a main audio signal;

a difference processing module, configured to perform difference processing on the first channel signal and the second channel signal;

the tuning module is used for adjusting the first channel signal and the second channel signal after the difference value processing so as to obtain a surround audio signal;

the second sound mixing module is used for carrying out sound mixing processing on the surround audio signal and the main audio signal; and

and the loudspeaker is used for outputting the audio signals after the sound mixing processing to form a sound field with a surround effect.

Illustratively, the tuning module includes a delay processing unit, configured to perform delay processing on the difference-processed first channel signal and second channel signal.

Illustratively, the tuning module further includes a filtering unit, configured to adjust frequency band ranges of the first channel signal and the second channel signal after the time delay processing.

Exemplarily, the filtering unit comprises a low-pass filter and/or a high-pass filter.

Illustratively, the tuning module further includes an equalizing unit for adjusting the amplitudes of the filtered first channel signal and the second channel signal.

Illustratively, the tuning module further comprises a gain adjusting unit for allocating the amplitudes of the different frequency bands.

Yet another aspect of the present invention provides a method of increasing a surround effect in a mono audio box, the method comprising:

a first sound mixing step, namely acquiring a first sound channel signal and a second sound channel signal, and performing sound mixing processing on the first sound channel signal and the second sound channel signal to generate a main audio signal;

a difference processing step of performing difference processing on the first channel signal and the second channel signal;

a tuning step, namely adjusting the first channel signal and the second channel signal after the difference processing to obtain a surround audio signal;

a second mixing step of mixing the surround audio signal and the main audio signal; and

and an output step of outputting the audio signal after the audio mixing processing to form a sound field with a surround effect.

Illustratively, the tuning step further comprises: and performing time delay processing on the first channel signal and the second channel signal after the difference processing.

Illustratively, the tuning step further comprises:

adjusting the frequency range of the first channel signal and the second channel signal after difference processing;

adjusting the amplitudes of the first channel signal and the second channel signal after the frequency range is adjusted;

and distributing the amplitudes of different frequency bands.

Another aspect of the present invention provides a system for increasing a surround effect in a mono audio box, the system comprising:

a processor;

a memory for storing processor-executable instructions;

the processor is configured to execute the instructions stored in the memory, so that the processor performs the aforementioned method.

The single-sound-channel sound box comprises a difference value processing module, a tuning module, a sound mixing module and a loudspeaker. Different from the method that the existing single sound channel sound box directly mixes the sound of the audio signals from the left and right sound channels to obtain the main audio, the sound box of the invention adds the processing step of carrying out secondary sound mixing on the signals of the left and right sound channels. The secondary mixing can generate an audio signal with a surround effect, and the audio signal with the surround effect is superimposed with the main audio to obtain a final audio with the surround effect. Because the single sound channel sound box only has one sound channel, the surrounding effect cannot be realized, and the user experience is poor. The invention overcomes the defects that the single sound channel sound box can not realize the surround effect and the played sound has poor quality, and greatly improves the playing effect of the single sound channel sound box.

In addition, the invention can control the loudness and the action range of the surround audio signal by adjusting the frequency band range and the amplitude of the audio in the secondary mixing and the amplitude distribution of different frequency bands, thereby achieving a relatively ideal surround effect and further improving the spatial sense and the hierarchical sense of the single sound channel sound box.

Drawings

The following drawings of the invention are included to provide a further understanding of the invention. The drawings illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.

In the drawings:

FIG. 1 shows a schematic block diagram of a mono enclosure in one embodiment of the invention;

FIG. 2 shows a schematic block diagram of a mono enclosure in another embodiment of the invention;

FIG. 3 is a flow chart illustrating a method for adding surround effect in a mono enclosure in one embodiment of the present invention;

fig. 4 is a schematic block diagram of a system for implementing the addition of surround effects in a mono audio box according to an embodiment of the present invention.

Detailed Description

In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art, that the present invention may be practiced without one or more of these specific details. In other instances, well-known features have not been described in order to avoid obscuring the invention.

It is to be understood that the present invention may 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, and will fully convey the scope of the invention to those skilled in the art. In the drawings, the size and relative sizes of layers and regions may be exaggerated for clarity. Like reference numerals refer to like elements throughout.

It will be understood that when an element or layer is referred to as being "on," "adjacent to," "connected to," or "coupled to" other elements or layers, it can be directly on, adjacent to, connected or coupled to the other elements or layers or intervening elements or layers may be present. In contrast, when an element is referred to as being "directly on," "directly adjacent to," "directly connected to" or "directly coupled to" other elements or layers, there are no intervening elements or layers present. It will be understood that, although the terms first, second, third, etc. may be used to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the present invention.

Spatially relative terms, such as "under," "below," "beneath," "under," "above," "over," and the like, may be used herein for convenience in describing the relationship of one element or feature to another element or feature illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, then elements or features described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary terms "under" and "under" can encompass both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatial descriptors used herein interpreted accordingly.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. As used herein, the term "and/or" includes any and all combinations of the associated listed items.

In order to provide a thorough understanding of the present invention, a detailed structure will be set forth in the following description in order to explain the present invention. The following detailed description of the preferred embodiments of the invention, however, the invention is capable of other embodiments in addition to those detailed.

In order to solve the problem of poor surrounding effect of the prior single sound channel sound box, the invention provides a single sound channel sound box, and the device comprises:

The monophonic sound box comprises a difference value processing module, a tuning module, a sound mixing module and a loudspeaker. Different from the method that the existing single sound channel sound box directly mixes the sound of the audio signals from the left and right sound channels to obtain the main audio, the sound box of the invention adds the processing step of carrying out secondary sound mixing on the signals of the left and right sound channels. The secondary mixing can generate an audio signal with a surround effect, and the audio signal with the surround effect is superimposed with the main audio to obtain a final audio with the surround effect. Because the single sound channel sound box only has one sound channel, the surrounding effect cannot be realized, and the user experience is poor. The invention overcomes the defects that the single sound channel sound box can not realize the surround effect and the quality of the played sound is poor, and greatly improves the playing effect of the single sound channel sound box.

The invention can control the loudness and action range of the surround audio signal by adjusting the frequency band range and amplitude of the audio in the secondary audio mixing and the amplitude distribution of different frequency bands, thereby achieving a relatively ideal surround effect, increasing the surround effect in the monophonic sound box and further improving the spatial sense and the hierarchical sense of the monophonic sound box.

In the following, a mono enclosure in an embodiment of the invention is described with reference to fig. 1 and fig. 2, where fig. 1 shows a schematic block diagram of a mono enclosure in an embodiment of the invention; FIG. 2 shows a schematic block diagram of a mono enclosure in another embodiment of the invention.

As an example, as shown in fig. 1, a mono speaker 100 of the present invention includes a mixing module 101, where the mixing module 101 may include a first mixing module and a second mixing module, where the first mixing module (e.g., a first mixer 1011 as shown in fig. 2) is configured to obtain a first channel signal and a second channel signal, perform mixing processing on the first channel signal and the second channel signal, generate a main audio signal, and the first mixing module may retain a complete signal in an input audio signal, so as to avoid a lack of the main audio signal.

The mixing module 101 may be any mixer capable of mixing sound, or a mixing circuit with mixing sound. The first channel signal and the second channel signal may be two channel signals, such as a left channel signal and a right channel signal, among a plurality of mono channel signals included in the audio signal, and the audio signal may be an audio signal of an arbitrary scene, such as a sound signal of a song, a sea wave sound, and the like.

The audio signal may be obtained from an electronic device connected to the mono audio box, including but not limited to a computer, a cell phone, a tablet computer, a car device, a smart tv, etc.

In one example, the mono speaker 100 further includes a difference processing module 102 for performing difference processing on the first channel signal and the second channel signal. In this embodiment, the first channel signal and the second channel signal may refer to a left channel signal and a right channel signal. The difference processing module can intercept the part of the audio signal which is different from the left channel signal and the right channel signal, and the left channel signal and the right channel signal are convenient to distinguish, so that the audio signal after difference processing is a part of the main audio signal, and the surround effect can be increased on the premise of ensuring the integrity of the main audio signal by intercepting and adding the audio signal into the main audio signal.

The difference processing module 102 may be any difference circuit or the like capable of implementing difference processing (also called subtraction processing) between different signals, and is not limited in detail herein.

In one example, the monophonic loudspeaker box 100 further includes a tuning module 103, configured to adjust the difference-processed first channel signal and the second channel signal, for example, adjust a frequency band range, an amplitude value, and an amplitude value allocation of different frequency bands of the difference-processed first channel signal and the second channel signal, so as to obtain a surround audio signal. The left and right channel signals intercepted from the audio signals are subjected to adjustment of frequency range, amplitude and amplitude distribution of different frequency ranges through the tuning module, the loudness and the action range of the surround audio signals can be controlled, and the adjusted signals have surround effects and can be called surround audio signals.

In a specific example, as shown in fig. 2, the tuning module 103 is further configured to perform a delay processing on the first channel signal and the second channel signal after the difference processing, so as to prolong a time when the audio signal is received. Specifically, the tuning module 103 includes a delay processing unit 1031, configured to perform delay processing on the difference-processed first channel signal and the second channel signal, so that the audio signal after delay processing is received later than the main audio signal. For a user with normal binaural hearing, when listening to the delayed audio signal, the human ear will recognize the audio signal as a surround stereo effect, so the delay processing of the present invention can delay the audio signal, let the user feel that a part of the sound signal is transmitted from a farther place, and further let the user feel the surround effect.

In an example, the tuning module 103 further includes a filtering unit, where the filtering unit is configured to adjust a frequency band range of the first channel signal and the second channel signal after the time delay processing, so that the frequency band range is different from a frequency band range of the main audio signal, avoid interference on the main audio signal, and reduce an influence on bass.

The filtering unit can improve the size difference of the sound pressure intensity received by the auditory system of the user, thereby enabling the user to generate the feeling of a wide sound field. The frequency range after filtering can be set reasonably according to actual needs, for example, the frequency range can be an intermediate frequency band, or the like.

As shown in fig. 2, the filtering module includes a low pass filter 1033 and/or a high pass filter 1032. The high-pass filter 1032 is configured to high-pass filter the first channel signal and the second channel signal, and the low-pass filter 1033 is configured to low-pass filter the first channel signal and the second channel signal. In this embodiment, according to the auditory characteristics of human ears, the very low or high frequency audio frequency does not affect the perception effect of the user on the sound, and the high-low switching processing is performed on the audio data of the two sound channels, so that the influence of the high frequency audio and the low frequency audio on the limited amplitude value can be reduced, and the original audio tone quality is not affected.

Further, the tuning module 103 further includes an equalizing unit for adjusting the amplitudes of the first channel signal and the second channel signal after filtering. As shown in fig. 2, the equalization unit includes an equalizer 1034.

An Equalizer (Equalizer) is an electronic device that can adjust the amount of amplification of electrical signals of various frequency components, respectively, to compensate for the deficiencies of loudspeakers and sound fields by adjusting the electrical signals of various frequencies. The general equalizer can respectively adjust the high-frequency, the medium-frequency and the low-frequency three-section frequency electric signals. The equalization module can adjust timbre, adjust sound field and suppress acoustic feedback.

In one example, the tuning module 103 further includes a gain adjustment unit for allocating amplitudes of different frequency bands. Optionally, the gain adjustment unit comprises a gain adjuster 1035. The gain adjuster 1035 changes the magnitude of the gain by adjusting the feedback amount (e.g., linearly increasing the feedback amount or linearly decreasing the feedback amount) of the circuitry in the loudspeaker.

The gain adjustment unit may be any module known to those skilled in the art that is capable of adjusting the gain.

The filtered audio signal is adjusted by the equalizing unit and the gain adjusting unit, and the volume sensations (i.e., signal amplitudes) of different frequencies and the volume sensation of the whole surround effect are adjusted according to the actual auditory effect.

The human auditory system is directed to the sound field by two aspects: 1) The length of time the sound is received; 2) The received sound pressure intensity.

The present embodiment can improve the difference between the two aspects by including filtering modules of different filters to give a user a feeling of a wide sound field. The delay unit can extend the tuned signal to the perception of the user that a portion of the sound is coming from a further distance. The tuning module can adjust the amplitude and the frequency width of the surround audio signal to control the loudness and the action range of the signal, so as to achieve a relatively ideal surround effect.

Further, the audio mixing module is further configured to perform audio mixing processing on the surround audio signal and the main audio signal. For example, as shown in fig. 2, the mixing module includes a second mixing module, for example, a second mixer 1012, configured to mix the surround audio signal with the main audio signal.

In one example, the mono audio box 100 further includes a speaker (not shown) for outputting the audio signal after the mixing process to form a sound field with surround effect.

The mixing module uses an output interface (e.g., using bluetooth, HDMI (high definition media interface), or other output interface) to output the audio signal to an output device, such as a speaker.

A loudspeaker (also called a horn) is an electroacoustic transducer, and is an important component in an electroacoustic system. Audio power causes the cone or diaphragm of a speaker to vibrate the surrounding air by electromagnetic, piezoelectric, or electrostatic effects, producing a sound.

The speaker may be a component of a mono sound box, or may be disposed in various electronic devices, such as a mobile phone, a computer, a tablet computer, and a television.

In the foregoing embodiment, data transmission and interaction are performed between each module and the device through a data transmission module, which may be a wired data transmission module or a wireless data transmission module, where the wired data transmission module may include, but is not limited to, an ethernet or other suitable wired communication manner, and the wireless data transmission module may include an Internet (Internet) network, a mobile communication network (such as a GPRS network, a GSM network, a 2G network, a 3G network, a 4G network, an LTE network, or a 5G network, etc.), a WIFI network, and the like.

In the following, a method for increasing surround effect in a mono audio box according to an embodiment of the present invention is described with reference to fig. 3, and technical features between different embodiments in this document may be cited without contradiction.

In one example, a method of increasing a surround effect in a mono enclosure comprises:

step S301 is a first sound mixing step, which acquires a first channel signal and a second channel signal, and performs sound mixing processing on the first channel signal and the second channel signal to generate a main audio signal;

step S302 is a difference processing step, and is capable of acquiring an audio signal including a first channel signal and a second channel signal, and performing difference processing on the first channel signal and the second channel signal.

Wherein the difference processing step is performed before the second mixing step (which will be described later), and further before the final audio signal is generated, for avoiding interference with the main audio signal.

Step S303 is a tuning step, and is capable of adjusting the difference-processed first channel signal and second channel signal to obtain a surround audio signal, for example, adjusting the frequency range, amplitude and amplitude allocation of different frequency bands of the difference-processed first channel signal and second channel signal to obtain the surround audio signal.

Specifically, the tuning step includes the steps of:

first, delay processing is performed on the first channel signal and the second channel signal after the difference processing. The delayed audio signal is received later relative to the main audio signal. For a user with normal binaural hearing, when listening to the delayed audio signal, the human ear will recognize the audio signal as a surround stereo effect, so the delay processing of the present invention can delay the audio signal, let the user feel that a part of the sound signal is transmitted from a farther place, and further let the user feel the surround effect.

Then, the frequency band ranges of the delayed first channel signal and the second channel signal are adjusted (e.g., the delayed first channel signal and the delayed second channel signal are filtered) to obtain the frequency band range for generating the surround effect. The frequency range is different from the frequency range of the main audio signal, so that the interference to the main audio signal is avoided, and the influence on bass is reduced.

The frequency range after filtering can be reasonably set according to actual needs, for example, the frequency range can be an intermediate frequency range, or the like.

The method for adjusting the frequency range of the delayed first channel signal and the second channel signal specifically includes: and respectively carrying out high-pass filtering and low-pass filtering on the delayed first sound channel signal and the second sound channel signal.

Depending on the auditory properties of the human ear, very low or very high frequency audio does not affect the user's perception of sound. The high-low switching processing is carried out on the audio data of the two sound channels, the influence of high-frequency sound and low-frequency sound on the limited amplitude value can be reduced, and the original audio tone quality is not influenced. This step can improve the magnitude difference of the sound pressure intensity received by the auditory system of the user through filtering, thereby allowing the user to produce a feeling of a wide sound field.

Then, the amplitudes of the first channel signal and the second channel signal after the frequency range is adjusted, that is, equalization processing is performed, and the function can be realized by an equalizer.

And then, distributing the amplitudes of different frequency bands, namely performing gain processing on the equalized audio signal.

And adjusting the filtered audio signals through an equalizer and a gain adjusting unit, and adjusting the volume sensations of different frequencies and the volume sensation of the whole surround effect according to the actual auditory effect to obtain the surround audio signals.

Step S304 is a second mixing step, in which the surround audio signal and the main audio signal are mixed. And an output step of step S305 of outputting the audio signal after the mixing process to form a sound field having a surround effect.

In summary, the mono sound box and the method for increasing the surround effect in the mono sound box of the present invention can increase the surround effect in the mono sound box, so as to achieve a more ideal surround effect and improve the spatial sense and the hierarchical sense of the mono sound box.

Finally, referring to fig. 4, the present invention also provides a system 300 for adding surround effects in a mono audio box. The system 300 may be implemented in a mono speaker, a mobile phone, a computer, a digital broadcast terminal, a messaging device, a game console, a tablet device, or a personal digital assistant, among other devices. As shown in fig. 4, the system 300 includes one or more processors 302, one or more memory devices 304. Optionally, the system for adding surround effects in a mono audio box 300 may further include at least one of an input device 306, an output device 308, and an image sensor, interconnected by a bus system 312 and/or other form of connection mechanism (not shown). It should be noted that the components and configuration of system 300 shown in fig. 4 are merely exemplary and not limiting, and the electronic device may have other components and configurations as desired, such as a transceiver for transceiving signals.

The processor 302 may be a Central Processing Unit (CPU), or other form of processing unit having data processing capabilities and/or instruction execution capabilities, and may control other components in the system 300 to add surround effects in a mono box to perform desired functions. The processor can execute the instructions stored in the storage 304 to perform the method for adding surround effects in a mono enclosure described herein. For example, the processor 302 can include one or more embedded processors, processor cores, microprocessors, logic circuits, hardware Finite State Machines (FSMs), digital Signal Processors (DSPs), or a combination thereof. Preferably, the processor 302 includes a Digital Signal Processor (DSP), and the DSP may include the first sound mixing module, the difference processing module, the tuning module, the second sound mixing module, and the like described above, and the specific structure and function of each module may refer to the description above, and the DSP algorithm is utilized to increase the surround effect in the monaural sound box, so as to improve the spatial sense and the hierarchical sense of the monaural sound box.

The storage 304, i.e., memory used to store processor-executable instructions, may comprise one or more computer program products, which may include various forms of computer-readable storage media, such as volatile memory and/or non-volatile memory. The input device 306 may be a device used by a user to input instructions and may include one or more of a keyboard, a mouse, a microphone, a touch screen, and the like.

The output device 308 may output various information (e.g., images or sounds) to an external (e.g., user), and may include one or more of a display, a speaker, and the like.

A communication interface (not shown) is used to communicate between the system for enhancing surround effects in a mono audio box 300 and other devices, including wired or wireless communication.

In addition, the embodiment of the invention also provides a computer storage medium, and the computer storage medium is stored with the computer program. When the computer program is executed by a processor, the method for increasing the surround effect in the mono sound box of the foregoing embodiment or each constituent module in the mono sound box may be implemented.

Although the illustrative embodiments have been described herein with reference to the accompanying drawings, it is to be understood that the foregoing illustrative embodiments are merely exemplary and are not intended to limit the scope of the invention thereto. Various changes and modifications may be effected therein by one of ordinary skill in the pertinent art without departing from the scope or spirit of the present invention. All such changes and modifications are intended to be included within the scope of the present invention as set forth in the appended claims.

Claims

1. A mono audio box, comprising:

2. The mono audio box of claim 1, wherein the tuning module comprises a delay processing unit for performing delay processing on the first channel signal and the second channel signal after the difference processing.

3. The mono audio box of claim 2, wherein the tuning module further comprises a filtering unit for adjusting the frequency band range of the first channel signal and the second channel signal after the delay processing.

4. A mono loudspeaker as in claim 3, wherein the filtering unit comprises a low pass filter and/or a high pass filter.

5. The mono audio box of claim 3, wherein the tuning module further comprises an equalization unit to adjust the amplitude of the filtered first and second channel signals.

6. The mono audio box of claim 1, wherein the tuning module further comprises a gain adjustment unit for assigning amplitudes of different frequency bands.

7. A method for increasing surround effects in a mono enclosure, the method comprising:

a second sound mixing step of performing sound mixing processing on the surround audio signal and the main audio signal; and

8. The method of claim 7, wherein the tuning step further comprises: and performing time delay processing on the first channel signal and the second channel signal after the difference processing.

9. The method of claim 7, wherein the tuning step further comprises:

and distributing the amplitudes of different frequency bands.

10. A system for adding surround effects in a mono audio box, the system comprising:

a processor;

a memory for storing processor-executable instructions;

the processor is configured to execute the instructions stored in the memory to cause the processor to perform the method of any of claims 7 to 9.