CN113810829A - Method and apparatus for processing audio signal - Google Patents
Method and apparatus for processing audio signal Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R5/00—Stereophonic arrangements
- H04R5/04—Circuit arrangements, e.g. for selective connection of amplifier inputs/outputs to loudspeakers, for loudspeaker detection, or for adaptation of settings to personal preferences or hearing impairments
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R5/00—Stereophonic arrangements
- H04R5/02—Spatial or constructional arrangements of loudspeakers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
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Abstract
A method and apparatus for processing an audio signal are provided. In the method, the audio signals of two sound channels can be divided into signals with different frequencies, then the divided signals are amplified, the first low-frequency signal and the second low-frequency signal are output to a first loudspeaker to be played, the first high-frequency signal and the second high-frequency signal are output to a fourth loudspeaker to be played, and the first intermediate-frequency signal and the second intermediate-frequency signal are played by different loudspeakers, so that the low-frequency signal and the high-frequency signal are still played by adopting a single sound channel, and the intermediate-frequency signal is played by adopting different loudspeakers to realize a stereo effect.
Description
Technical Field
The present application relates to the audio field, and more particularly, to a method and apparatus for processing an audio signal in the audio field.
Background
When the audio signal is played, the sound can be played by using the single-channel sound, but the sound played by the single-channel sound has no stereo sound and is dry; the dual-channel sound box can be used for playing sound to achieve a stereo effect, the field effect is good, the stereoscopic impression is strong, and the user requirements can be met. The dual-channel sound equipment has high cost, for example, the dual-channel sound equipment has a large number of loudspeakers, a large volume of the sound box, and a complex circuit board, which results in high cost.
Disclosure of Invention
The application provides a method and a device for processing audio signals, which can reduce the cost of a dual-channel sound box and have a certain stereo effect.
In a first aspect, a method of processing an audio signal is provided, comprising: acquiring a first channel audio signal and a second channel audio signal; dividing the first channel audio signal into a first low frequency signal, a first intermediate frequency signal and a first high frequency signal; dividing the second channel audio signal into a second low frequency signal, a second intermediate frequency signal and a second high frequency signal; amplifying the power of the first low-frequency signal and the second low-frequency signal and outputting the amplified power to a first loudspeaker; amplifying the power of the first intermediate frequency signal and outputting the amplified first intermediate frequency signal to a second loudspeaker; amplifying the power of the second intermediate frequency signal and outputting the amplified second intermediate frequency signal to a third loudspeaker; and amplifying the power of the first high-frequency signal and the second high-frequency signal and outputting the amplified power to a fourth loudspeaker.
In the above technical solution, the audio signals of the two channels may be divided into signals of different frequencies, and then the divided signals are amplified, the first low frequency signal and the second low frequency signal are output to the first speaker for playing, the first high frequency signal and the second high frequency signal are output to the fourth speaker for playing, and the first intermediate frequency signal and the second intermediate frequency signal are played by using different speakers, so that the low frequency signal and the high frequency signal are still played by using a single channel, and the intermediate frequency signal is played by using different speakers to realize a stereo effect.
In some possible implementations, the second horn is the same horn as the first horn. For example, the first horn is a woofer.
In some possible implementations, the second horn is a different horn than the first horn. For example, the first horn is a woofer and the second horn is a midrange horn.
In some possible implementations, the third horn and the fourth horn are the same horn. For example, the third horn is a tweeter.
In some possible implementations, the third horn and the fourth horn are different horns. For example, the third horn is a midrange horn and the fourth horn is a tweeter.
In some possible implementations, the first horn and the third horn are the same horn. For example, the first horn is a woofer.
In some possible implementations, the second horn and the fourth horn are the same horn. For example, the fourth horn is a tweeter.
In a second aspect, there is provided an apparatus for processing an audio signal, the apparatus being configured to perform the method of the first aspect or any of the possible implementations of the first aspect. In particular, the apparatus may comprise a communication interface and a processor for performing the method of the first aspect or any possible implementation manner of the first aspect.
Optionally, the apparatus further comprises a memory coupled with the processor, the processor being configured to execute computer programs or instructions stored in the memory to implement the method of the first aspect or any possible implementation manner of the first aspect.
In a third aspect, a computer readable storage medium is provided, on which a computer program (also referred to as instructions or code) for implementing the method in the first aspect is stored.
The computer program, when executed by a computer, causes the computer to perform the method of the first aspect, for example. The computer may be a device that processes audio signals.
In a fourth aspect, the present application provides a computer program product comprising a computer program (also referred to as instructions or code) which, when executed by a computer, causes the computer to carry out the method of the first aspect. The computer may be a device that processes audio signals.
Drawings
Fig. 1 is a system architecture diagram provided in an embodiment of the present application.
Fig. 2-9 are schematic diagrams illustrating a method for processing an audio signal according to an embodiment of the present application.
Fig. 10 is a schematic block diagram of an apparatus for processing an audio signal according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.
As shown in fig. 1, a schematic diagram of a system architecture provided by an embodiment of the present application is shown. The system architecture includes a Digital Signal Processor (DSP) 100 and a speaker unit 130, wherein the DSP100 may include a frequency division unit 110 and a power amplification unit 120.
A frequency dividing unit 110, configured to frequency-divide the left channel audio signal and the right channel audio signal. For example, the frequency dividing unit 110 divides the left channel audio signal into a left channel low frequency signal, a left channel intermediate frequency signal, and a left channel high frequency signal; the frequency dividing unit 110 divides the right channel audio signal into a right channel low frequency signal, a right channel intermediate frequency signal, and a right channel high frequency signal. Alternatively, the frequency dividing unit 110 may include two frequency dividing subunits, one for frequency dividing the left channel audio signal and the other for frequency dividing the right channel audio signal.
And the power amplification unit 120 is configured to amplify the power of the audio signal divided by the frequency division unit. For example, the power amplification unit 120 is configured to amplify a left channel low frequency signal, a left channel intermediate frequency signal, a left channel high frequency signal, a right channel low frequency signal, a right channel intermediate frequency signal, and a right channel high frequency signal. Optionally, the power amplifier unit 120 may include two power amplifier subunits, one power amplifier subunit is configured to perform power amplification on the left channel low-frequency signal, the left channel intermediate-frequency signal, and the left channel high-frequency signal, and the other power amplifier subunit is configured to perform power amplification on the right channel low-frequency signal, the right channel intermediate-frequency signal, and the right channel high-frequency signal. Optionally, the power amplification coefficients of the two power amplification subunits may be the same.
And the loudspeaker unit 130 is used for playing the audio signal output by the power amplification unit. For example, the speaker unit 130 is used to play the amplified left channel low frequency signal, left channel intermediate frequency signal, left channel high frequency signal, right channel low frequency signal, right channel intermediate frequency signal, and right channel high frequency signal. The speaker unit 130 may be composed of a plurality of speakers, for example, the speaker unit 130 includes one or more woofers for playing the amplified left channel low frequency signal, right channel low frequency signal and left channel intermediate frequency signal, and one or more tweeters for playing the amplified right channel intermediate frequency signal, left channel high frequency signal and right channel high frequency signal. For another example, the speaker unit 130 includes a woofer for playing the amplified left channel low frequency signal and the amplified right channel low frequency signal, two middle speakers for playing the amplified left channel intermediate frequency signal, another middle speaker for playing the amplified right channel intermediate frequency signal, and a tweeter for playing the amplified left channel high frequency signal and the amplified right channel high frequency signal.
It is understood that the DSP100 may also comprise other units, for example, at least one of a compensation unit, a codec unit, a speech enhancement unit, and the like.
Fig. 2 below describes a method 200 for processing an audio signal according to an embodiment of the present application, where the method 200 may be performed by the DSP shown in fig. 1, and the method 200 includes:
s210, acquiring a first channel audio signal and a second channel audio signal.
Illustratively, the first channel audio signal is a left channel audio signal and the second channel audio signal is a right channel audio signal.
S220, the first channel audio signal is divided into a first low frequency signal, a first intermediate frequency signal and a first high frequency signal.
For example, the frequency range of the first low frequency signal is 20Hz-1KHz, the frequency range of the first intermediate frequency signal is 1KHz-5KHz, and the frequency range of the first high frequency signal is 5KHz-20KHz, but is not limited to the above ranges.
S230, the second channel audio signal is divided into a second low frequency signal, a second intermediate frequency signal and a second high frequency signal.
For example, the frequency range of the second low frequency signal is 20Hz-1KHz, the frequency range of the second intermediate frequency signal is 1KHz-5KHz, and the frequency range of the second high frequency signal is 5KHz-20KHz, but is not limited to the above ranges.
It should be noted that the order of S220 and S230 is not limited, and may be executed simultaneously or sequentially.
And S240, amplifying the power of the first low-frequency signal and the second low-frequency signal and outputting the amplified power to the first loudspeaker.
And S250, amplifying the power of the first intermediate frequency signal and outputting the amplified first intermediate frequency signal to a second loudspeaker.
And S260, amplifying the power of the second intermediate frequency signal and outputting the amplified second intermediate frequency signal to a third loudspeaker.
And S270, amplifying the power of the first high-frequency signal and the second high-frequency signal and outputting the amplified first high-frequency signal and the amplified second high-frequency signal to a fourth loudspeaker.
Alternatively, S240-S270 may be performed simultaneously.
Alternatively, S220 and S230 may be performed by the frequency dividing unit 110 of fig. 1. S240-S270 may be performed by the power amplifier unit 120 and the horn unit 130 of fig. 1, where the horn unit 130 of fig. 1 includes the first horn, the second horn, the third horn, and the fourth horn of the method 200.
Therefore, in the method 200, the DSP may divide the audio signals of the two channels into audio signals of different frequency bands, amplify the divided audio signals, output the first low frequency signal and the second low frequency signal to the first speaker for playing, output the first high frequency signal and the second high frequency signal to the fourth speaker for playing, and play the first intermediate frequency signal and the second intermediate frequency signal with different speakers, so that the low frequency signal and the high frequency signal are still played by using a single channel, and the intermediate frequency signal is played by using different speakers to achieve a stereo effect. For example, the first channel audio signal is a left channel audio signal, the second channel audio signal is a right channel audio signal, the first speaker is a woofer, and the fourth speaker is a tweeter, so that by the method 200, the low frequency signals of the left and right channels can be played through the same speaker, the high frequency signals of the left and right channels can be played through the same speaker, and the intermediate frequency signals of the left and right channels can be played through different speakers, thereby achieving a stereo effect, and most of the energy of the audio signals is concentrated in the intermediate frequency portion, thereby contributing to improving the stereo effect of the audio signals.
The method for processing an audio signal in the embodiment of the present application is described in the following with reference to fig. 3 to 9 in seven cases, where the reference numerals are omitted in units in the following embodiments, for example, a frequency dividing unit is "frequency dividing unit 110" in fig. 1.
In the first case, the first horn and the second horn are the same horn, and the third horn and the fourth horn are the same horn.
Describing case one in conjunction with fig. 3, the frequency dividing unit performs S220 and S230, and specifically, the frequency dividing unit divides the first channel audio signal into a first low frequency signal, a first intermediate frequency signal, and a first high frequency signal, and the frequency dividing unit divides the second channel audio signal into a second low frequency signal, a second intermediate frequency signal, and a second high frequency signal. The power amplification unit amplifies the obtained frequency-divided first low-frequency signal, first intermediate-frequency signal, first high-frequency signal, second low-frequency signal, second intermediate-frequency signal and second high-frequency signal to obtain an amplified first low-frequency signal, an amplified first intermediate-frequency signal, an amplified first high-frequency signal, an amplified second low-frequency signal, an amplified second intermediate-frequency signal and an amplified second high-frequency signal. The amplified first low-frequency signal, the amplified first intermediate-frequency signal, and the amplified second low-frequency signal are output to a first horn (or a second horn), and the amplified first high-frequency signal, the amplified second intermediate-frequency signal, and the amplified second high-frequency signal are output to a fourth horn (or a third horn).
In case two, the first horn and the third horn are the same horn, and the second horn and the fourth horn are the same horn.
In a case two described with reference to fig. 4, the frequency dividing unit performs S220 and S230, and specifically, as in the description of fig. 3, to avoid unnecessary details, in fig. 4, the amplified first intermediate frequency signal, the amplified first high frequency signal, and the amplified second high frequency signal may be output to the fourth speaker, and the amplified second intermediate frequency signal, the amplified first low frequency signal, and the amplified second low frequency signal may be output to the first speaker.
Alternatively, the first horn in fig. 3 and 4 is a woofer and the fourth horn is a tweeter.
In the above-mentioned circumstances one and circumstances two, the low frequency signal of two sound channels is through the broadcast of the same loudspeaker, the high frequency signal of two sound channels is through the broadcast of the same loudspeaker, the intermediate frequency signal of two sound channels is through the broadcast of different first loudspeaker and fourth loudspeaker, thereby can realize the stereo broadcast of intermediate frequency signal, can avoid among the prior art in order to realize stereo, the intermediate frequency signal, the low frequency signal, the high frequency signal all need broadcast the too many problem of loudspeaker quantity that leads to through the loudspeaker of difference respectively, can reduce cost. For example, in order to implement stereo in the prior art, a signal of one frequency band is played through two different speakers as an example, in order to implement stereo in the prior art, a high-frequency signal needs to be played by two different speakers, a low-frequency signal needs to be played by two different speakers, an intermediate-frequency signal needs to be played by two different speakers, and the prior art needs to play by six speakers in total; the other loudspeaker plays the amplified first high-frequency signal, the amplified other intermediate-frequency signal and the amplified second high-frequency signal. The embodiment of the application can save the number of the loudspeakers and can realize certain stereo effect.
In case three, the first horn and the second horn are the same horn, and the third horn and the fourth horn are different horns.
Describing case three with reference to fig. 5, the frequency dividing unit performs S220 and S230, specifically, the same as the description of fig. 3, and in order to avoid redundant details, in fig. 5, the amplified first low-frequency signal, the amplified first intermediate-frequency signal, and the amplified second low-frequency signal are output to the first horn (or the second horn), the amplified second intermediate-frequency signal is output to the third horn, and the amplified first high-frequency signal and the amplified second high-frequency signal are output to the fourth horn.
Alternatively, in fig. 5 the first horn is a woofer, the third horn is a midrange horn, and the fourth horn is a tweeter.
Optionally, in fig. 5, the first horn and the third horn have the same specification, for example, the first horn and the third horn have the same parameters, such as sensitivity, distortion degree, and bandwidth. Thus, the stereo effect of the intermediate frequency signal is better.
In the third situation, the low-frequency signals of the two sound channels are played through the same loudspeaker, the high-frequency signals of the two sound channels are played through the same loudspeaker, the intermediate-frequency signals of the two sound channels are played through the different first loudspeaker and the third loudspeaker, so that the stereo playing of the intermediate-frequency signals can be realized, the problem that the number of the loudspeakers caused by the playing of the different loudspeakers is too large in the prior art can be avoided, and the cost can be reduced. For example, in order to implement stereo in the prior art, a signal of one frequency band is played through two different speakers respectively, in order to implement stereo in the prior art, a high-frequency signal needs to be played by two different speakers, a low-frequency signal needs to be played by two different speakers, an intermediate-frequency signal needs to be played by two different speakers, and in the prior art, six speakers are required for playing in total; a loudspeaker plays the amplified first high-frequency signal and the amplified second high-frequency signal; one loudspeaker plays the second intermediate frequency signal after enlargiing, and this application embodiment can save loudspeaker quantity simultaneously, also can realize certain stereo effect.
In case four, the first horn and the third horn are the same horn, and the second horn and the fourth horn are different horns.
Describing case three in conjunction with fig. 6, the frequency dividing unit performs S220 and S230, which are the same as the description of fig. 3, and are not described in detail in order to avoid redundancy. In fig. 6, the amplified first intermediate frequency signal may be output to the second horn, the amplified second intermediate frequency signal, the amplified first low frequency signal, and the amplified second low frequency signal may be output to the first horn, and the amplified first high frequency signal and the amplified second high frequency signal may be output to the fourth horn.
Alternatively, in fig. 6 the first horn is a woofer, the second horn is a midrange horn, and the fourth horn is a tweeter.
Optionally, in fig. 6, the first speaker and the second speaker have the same specification, for example, the first speaker and the second speaker have the same parameters such as sensitivity, distortion degree, bandwidth, and the like, so that the stereo effect of the if signal is better.
In the fourth condition, the low-frequency signals of the two sound channels are played through the same loudspeaker, the high-frequency signals of the two sound channels are played through the same loudspeaker, the intermediate-frequency signals of the two sound channels are played through the different first loudspeakers and the second loudspeakers, therefore, the stereo playing of the intermediate-frequency signals can be realized, the problem that the number of the loudspeakers caused by the playing of the different loudspeakers is too large in the prior art can be avoided, and the cost can be reduced. For example, in order to implement stereo in the prior art, a signal of one frequency band is played through two different speakers as an example, in order to implement stereo in the prior art, a high-frequency signal needs to be played by two different speakers, a low-frequency signal needs to be played by two different speakers, an intermediate-frequency signal needs to be played by two different speakers, and the prior art needs to play by six speakers in total; a loudspeaker plays the amplified first high-frequency signal and the amplified second high-frequency signal; a loudspeaker broadcast the first intermediate frequency signal after the enlargeing, when this application embodiment can save loudspeaker quantity, also can realize certain stereo effect.
In case five, the first horn and the second horn are different horns, and the third horn and the fourth horn are the same horn.
Describing case five with reference to fig. 7, the frequency dividing unit performs S220 and S230, specifically, the same as the description of fig. 3, and in order to avoid unnecessary details, in fig. 7, the amplified first low frequency signal and the amplified second low frequency signal are output to the first horn, the amplified first intermediate frequency signal is output to the second horn, and the amplified first high frequency signal, the amplified second intermediate frequency signal and the amplified second high frequency signal are output to the fourth horn.
Alternatively, in fig. 7 the first horn is a woofer, the second horn is a midrange horn and the fourth horn is a tweeter.
Optionally, in fig. 7, the specifications of the second speaker and the fourth speaker are the same, for example, the parameters of the second speaker and the fourth speaker, such as sensitivity, distortion degree, and bandwidth, are the same, so that the stereo effect of the if signal is better.
In the fifth case, the low-frequency signals of the two sound channels are played through the same loudspeaker, the high-frequency signals of the two sound channels are played through the same loudspeaker, the intermediate-frequency signals of the two sound channels are played through the different second loudspeaker and the different fourth loudspeaker, so that the stereo playing of the intermediate-frequency signals can be realized, the problem that the number of loudspeakers caused by the playing of the different loudspeakers is excessive in the prior art can be avoided, and the cost can be reduced. For example, in order to implement stereo in the prior art, a signal of one frequency band is played through two different speakers as an example, in order to implement stereo in the prior art, a high-frequency signal needs to be played by two different speakers, a low-frequency signal needs to be played by two different speakers, an intermediate-frequency signal needs to be played by two different speakers, and the prior art needs to play by six speakers in total; a loudspeaker plays the amplified first high-frequency signal, the amplified second intermediate-frequency signal and the amplified second high-frequency signal; a loudspeaker broadcast the first intermediate frequency signal after the enlargeing, when this application embodiment can save loudspeaker quantity, also can realize certain stereo effect.
In case six, the fourth horn and the second horn are the same horn, and the third horn and the first horn are different horns.
Describing case six in conjunction with fig. 8, the frequency dividing unit performs S220 and S230, specifically, the same as the description of fig. 3, and is not described in detail in order to avoid redundancy. In fig. 8, the amplified second intermediate frequency signal may be output to a third horn, the amplified first low frequency signal and the amplified second low frequency signal may be output to a first horn, and the amplified first intermediate frequency signal, the amplified first high frequency signal, and the amplified second high frequency signal may be output to a fourth horn.
Alternatively, in fig. 8 the first horn is a woofer, the third horn is a midrange horn and the fourth horn is a tweeter.
Optionally, in fig. 8, the third speaker and the fourth speaker have the same specification, for example, the third speaker and the fourth speaker have the same parameters such as sensitivity, distortion degree, bandwidth, and the like, so that the stereo effect of the if signal is better.
In the sixth case, the low-frequency signals of the two sound channels are played through the same loudspeaker, the high-frequency signals of the two sound channels are played through the same loudspeaker, the intermediate-frequency signals of the two sound channels are played through the different third loudspeaker and the different fourth loudspeaker, so that the stereo playing of the intermediate-frequency signals can be realized, the problem that the number of loudspeakers caused by the playing of the different loudspeakers is excessive in the prior art can be avoided, and the cost can be reduced. For example, in order to implement stereo in the prior art, a signal of one frequency band is played through two different speakers as an example, in order to implement stereo in the prior art, a high-frequency signal needs to be played by two different speakers, a low-frequency signal needs to be played by two different speakers, an intermediate-frequency signal needs to be played by two different speakers, and the prior art needs to play by six speakers in total; a loudspeaker plays the amplified first high-frequency signal, the amplified first intermediate-frequency signal and the amplified second high-frequency signal; one loudspeaker plays the second intermediate frequency signal after enlargiing, and this application embodiment can save loudspeaker quantity simultaneously, also can realize certain stereo effect.
In case seven, the first horn and the second horn are different horns, and the third horn and the fourth horn are different horns.
Describing case seven with reference to fig. 9, the frequency dividing unit performs S220 and S230, specifically, the same as the description of fig. 3, and in order to avoid unnecessary details, in fig. 9, the amplified first low-frequency signal and the amplified second low-frequency signal are output to the first horn, the amplified first intermediate-frequency signal is output to the second horn, the amplified second intermediate-frequency signal is output to the third horn, and the amplified first high-frequency signal and the amplified second high-frequency signal are output to the fourth horn.
Alternatively, in fig. 9, the amplified first intermediate frequency signal and the amplified second intermediate frequency signal may be interchanged, specifically, the amplified first intermediate frequency signal may be output to the third horn, and the amplified second intermediate frequency signal may be output to the second horn.
Alternatively, in fig. 9 the first horn is a woofer, the second and third horns are midrange horns, and the fourth horn is a tweeter.
Optionally, in fig. 9, the specifications of the second speaker and the third speaker are the same, for example, the parameters of the second speaker and the third speaker, such as sensitivity, distortion degree, and bandwidth, are the same, so that the stereo effect of the if signal is better.
Among the above-mentioned technical scheme, the first low frequency signal after enlarging and the second low frequency signal after enlarging are the low frequency signal, the first high frequency signal after enlarging and the second high frequency signal after enlarging are the high frequency signal, thus, the low frequency signal of two sound channels plays through the same loudspeaker, the high frequency signal of two sound channels plays through the same loudspeaker, the intermediate frequency signal of two sound channels plays through different second loudspeaker and third loudspeaker, thereby can realize the stereo broadcast of intermediate frequency signal, can avoid among the prior art in order to realize stereo, the intermediate frequency signal, the low frequency signal, the high frequency signal respectively need play the problem that the loudspeaker quantity that leads to through different loudspeaker, can reduce cost. For example, in order to implement stereo in the prior art, a signal of one frequency band is played through two different speakers as an example, in order to implement stereo in the prior art, a high-frequency signal needs to be played by two different speakers, a low-frequency signal needs to be played by two different speakers, an intermediate-frequency signal needs to be played by two different speakers, and the prior art needs to play by six speakers in total; a loudspeaker plays the amplified first high-frequency signal and the amplified second high-frequency signal; a loudspeaker plays the amplified first intermediate frequency signal; a speaker plays the amplified second intermediate frequency signal. The embodiment of the application can save the number of the loudspeakers and can realize certain stereo effect.
It should be noted that, in the embodiment of the present application, processing audio signals of two channels is taken as an example for description, in practical applications, audio signals of three or more channels may be processed, and the principle is consistent with the principle of processing audio signals of two channels, and for avoiding repeated description, the present application is not described in detail.
It should also be noted that, in the embodiment of the present application, the audio signal of each channel is divided into audio signals of three frequency bands, in practical applications, the audio signals of two frequency bands or more than three frequency bands may be divided, the number of the frequency bands is different, and the number of the speakers is also different, so as to avoid redundancy, this embodiment is not described in detail in this application.
It can be understood that, in the embodiments of the present application, the intermediate frequency signals are played through different speakers to realize stereo sound of the intermediate frequency signals, and in practical applications, the audio signals in any frequency band can be played through different speakers, and the audio signals in the remaining frequency bands can be played through the same speaker. For example, the first low-frequency signal and the second low-frequency signal may be amplified and then output to different speakers, the first intermediate-frequency signal and the second intermediate-frequency signal may be amplified and then output to the same speaker, and the first high-frequency signal and the second high-frequency signal may be amplified and then output to the same speaker, so that a stereo effect of the low-frequency signal may be achieved; for example, the first low-frequency signal and the second low-frequency signal may be amplified and output to the same speaker, the first intermediate-frequency signal and the second intermediate-frequency signal may be amplified and output to the same speaker, and the first high-frequency signal and the second high-frequency signal may be amplified and output to different speakers. For another example, the signals of the two channels may be divided into low frequency signals and high frequency signals, the high frequency signals of the two channels are played through the same speaker, and the low frequency signals of the two channels are played through different speakers, so that a stereo effect of the low frequency signals may be achieved.
The various embodiments described herein may be implemented as stand-alone solutions or combined in accordance with inherent logic and are intended to fall within the scope of the present application.
It is to be understood that the methods and operations implemented by the DSP in the above-described method embodiments may also be implemented by a component (e.g., a chip or a circuit) available for the DSP.
Embodiments of the methods provided herein are described above, and embodiments of the apparatus provided herein are described below. It should be understood that the description of the apparatus embodiments corresponds to the description of the method embodiments, and therefore, for brevity, details are not repeated here, since the details that are not described in detail may be referred to the above method embodiments.
Those of skill in the art would appreciate that the various illustrative components and algorithm steps described in connection with the embodiments disclosed herein may be implemented as hardware or combinations of hardware and computer software. Whether a function is performed as hardware or computer software drives hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
According to the method example, the embodiment of the present application may divide each functional module corresponding to each function, or integrate two or more functions into one processing module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. It should be noted that, the division of the modules in the embodiment of the present application is schematic, and is only one logical function division, and other feasible division manners may be available in actual implementation. The following description will be given taking the example of dividing each functional module corresponding to each function.
Fig. 10 is a schematic block diagram of an apparatus 1000 for processing an audio signal according to an embodiment of the present application. The apparatus 1000 includes a communication interface 1010 and a processor 1020. Communication interface 1020 may be one interface or two interfaces, for example, communication interface 1020 may include an input interface and an output interface. The communication interface 1010 can communicate with the outside. The processor 1020 is used for data processing, and the processor 1020 is used for executing the processing-related operations of the DSP in the above method embodiment.
The processor 1020 obtains a first channel audio signal and a second channel audio signal through the communication interface 1010; and a processor 1020 for: dividing the first channel audio signal into a first low frequency signal, a first intermediate frequency signal and a first high frequency signal; dividing the second channel audio signal into a second low frequency signal, a second intermediate frequency signal and a second high frequency signal; the processor 1020 is further configured to amplify the power of the first low-frequency signal and the second low-frequency signal by the communication interface 1010 and output the amplified power to the first speaker; amplifying the power of the first intermediate frequency signal and outputting the amplified first intermediate frequency signal to a second loudspeaker; amplifying the power of the second intermediate frequency signal and outputting the amplified second intermediate frequency signal to a third loudspeaker; and amplifying the power of the first high-frequency signal and the second high-frequency signal and outputting the amplified power to a fourth loudspeaker.
As an alternative embodiment, the second horn and the first horn are the same horn.
As an alternative embodiment, the second horn is a different horn than the first horn.
As an alternative embodiment, the third horn and the fourth horn are the same horn.
As an alternative embodiment, the third horn and the fourth horn are different horns.
As an optional embodiment, the first horn and the third horn are the same horn, and/or the second horn and the fourth horn are the same horn.
Optionally, the apparatus 1000 may further comprise a memory 1030, and the processor 1020 may be connected to the memory 1030. The memory 1030 may be used to store the program code or instructions. Accordingly, the memory 1030 may be a memory unit inside the processor 1020, an external memory unit independent from the processor 1020, or a component including a memory unit inside the processor 1020 and an external memory unit independent from the processor 1020.
Optionally, the apparatus 1000 may also include a bus 1040. The memory 1030 and the communication interface 1010 may be connected to the processor 1020 by a bus 1040. The bus 1040 may be divided into an address bus, a data bus, a control bus, and the like. For ease of illustration, only one line is shown in FIG. 10, but it is not intended that there be only one bus or one type of bus.
It should be understood that, in the embodiment of the present application, the processor 1020 may adopt a Central Processing Unit (CPU). The processor may also be other general purpose processors, Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. Or the processor 1020 adopts one or more integrated circuits for executing related programs to implement the technical solutions provided in the embodiments of the present application.
The memory 1030, which may include both read-only memory and random-access memory, provides instructions or code to the processor 1020.
In one possible implementation, the processor 1010 in the apparatus 1000 shown in fig. 10 may correspond to the frequency dividing unit 110 and the power amplifying unit 120 in fig. 1. The communication interface 1010 in the apparatus 1000 shown in fig. 10 is configured to receive the left channel audio signal and the right channel audio signal shown in fig. 1, and output the amplified signals to the speaker unit.
The apparatus 1000 according to the embodiment of the present application may correspond to performing the method described in the embodiment of the present application, and the above and other operations and/or functions of the units in the apparatus 1000 are respectively for implementing corresponding flows of the method, and are not described herein again for brevity.
Optionally, in some embodiments, the present application further provides a computer-readable medium storing program code, which when executed on a computer, causes the computer to execute the above method.
Optionally, in some embodiments, the present application further provides a computer program product, where the computer program product includes: computer program code which, when run on a computer, causes the computer to perform the above-described method.
Various storage media described herein can represent one or more devices and/or other machine-readable media for storing information. The term "machine-readable medium" can include, but is not limited to: wireless channels and various other media capable of storing, containing, and/or carrying instruction(s) and/or data.
Those of ordinary skill in the art will appreciate that the various illustrative elements and steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. Furthermore, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the present application, or portions thereof, may be embodied in the form of a computer software product stored in a storage medium, the computer software product including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to perform all or part of the steps of the methods described in the embodiments of the present application. The foregoing storage media may include, but are not limited to: various media capable of storing program codes, such as a usb disk, a removable hard disk, a read-only memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
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 application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
Finally, it should be noted that: the above description is only an embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions within the technical scope of the present disclosure should be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (10)
1. A method of processing an audio signal, comprising:
acquiring a first channel audio signal and a second channel audio signal;
dividing the first channel audio signal into a first low frequency signal, a first intermediate frequency signal and a first high frequency signal;
dividing the second channel audio signal into a second low frequency signal, a second intermediate frequency signal and a second high frequency signal;
amplifying the power of the first low-frequency signal and the second low-frequency signal and outputting the amplified power to a first loudspeaker;
amplifying the power of the first intermediate frequency signal and outputting the amplified first intermediate frequency signal to a second loudspeaker;
amplifying the power of the second intermediate frequency signal and outputting the amplified second intermediate frequency signal to a third loudspeaker;
and amplifying the power of the first high-frequency signal and the second high-frequency signal and outputting the amplified power to a fourth loudspeaker.
2. The method of claim 1, wherein the second horn is the same horn as the first horn.
3. The method of claim 1, wherein the second horn is a different horn than the first horn.
4. The method of any one of claims 1 to 3, wherein the third horn and the fourth horn are the same horn.
5. The method of any one of claims 1 to 3, wherein the third horn and the fourth horn are different horns.
6. The method of claim 1, wherein the first horn and the third horn are the same horn, and/or the second horn and the fourth horn are the same horn.
7. An apparatus for processing an audio signal, comprising a processor and a communication interface:
the processor is used for acquiring a first channel audio signal and a second channel audio signal through the communication interface;
and the processor is to:
dividing the first channel audio signal into a first low frequency signal, a first intermediate frequency signal and a first high frequency signal;
dividing the second channel audio signal into a second low frequency signal, a second intermediate frequency signal and a second high frequency signal;
the processor is further configured to, via the communication interface:
amplifying the power of the first low-frequency signal and the second low-frequency signal and outputting the amplified power to a first loudspeaker;
amplifying the power of the first intermediate frequency signal and outputting the amplified first intermediate frequency signal to a second loudspeaker;
amplifying the power of the second intermediate frequency signal and outputting the amplified second intermediate frequency signal to a third loudspeaker;
and amplifying the power of the first high-frequency signal and the second high-frequency signal and outputting the amplified power to a fourth loudspeaker.
8. The apparatus of claim 7, wherein the second horn is the same horn as the first horn, and/or the third horn is the same horn as the fourth horn.
9. The apparatus of claim 7 or 8, further comprising a memory coupled to the processor, the memory configured to store program instructions or code and to provide the program instructions or code to the processor.
10. A sound comprising a device as claimed in any one of claims 7 to 9.
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