CN104519454B - A kind of audio frequency signal output and device - Google Patents

Abstract

The invention discloses an audio signal output method and device, which solves the problem of poor effect when a plurality of terminals cooperatively output an audio signal in a multi-channel format. The method includes: when the terminal participates in multi-channel format cooperation to output an audio signal, determining the channel signal that the terminal needs to output; when determining that the terminal needs to output the preset channel signal of the audio signal, the preset The channel signal corresponding to the preset channel signal in the audio signal is mixed into the channel signal to obtain the mixed channel signal; wherein, the preset channel signal is the left rear channel signal and the right rear channel signal At least one of the channel signals; performing low-frequency enhancement processing on the mixed channel signal to obtain a low-frequency enhanced channel signal; outputting the low-frequency enhanced channel signal.

Description

Audio signal output method and device

technical field

The present invention relates to the technical field of terminals, in particular to an audio signal output method and device.

Background technique

The output of traditional audio signals is mostly carried out on a terminal, for example, a mobile phone is used to play music. In recent years, with the increasing number of terminal users such as mobile phones and tablet computers, people began to hope to use multiple terminals to cooperatively output an audio signal in a multi-channel format. For example, use five mobile phones to cooperatively play the same This can expand the sound field of the music and improve the music playback effect.

In the prior art, when five mobile phones are used to cooperatively play the same music in a five-channel format, the five mobile phones are respectively used to output one channel signal of the music, as shown in FIG. 1 . Since the built-in speakers of mobile phones and other terminals are small in size, the rendering effect of low-frequency signals in channel signals is not ideal. Therefore, in order to improve the low-frequency rendering effect, low-frequency enhancement processing will be performed before each channel signal is output.

However, when the low-frequency enhancement processing is performed on the signals of various channels, the degree of enhancement of the signals of various channels may be inconsistent, and the phase of the signals may change. Under normal circumstances, the phase change of the channel signal located behind the listener (such as the left rear channel signal and the right rear channel signal in Figure 1) does not have a great impact on the listener, while the channel located in front of the listener The phase change of the signal (such as the left channel signal, center channel signal, and right channel signal in Figure 1) will cause the position information of the listener's auditory perception to change, and many low-frequency enhancement techniques in the prior art will weaken The loudness of the channel signal, which ultimately leads to poor output of the audio signal.

Contents of the invention

Embodiments of the present invention provide an audio signal output method and device to solve the problem of poor effect when multiple terminals cooperatively output an audio signal in a multi-channel format.

In a first aspect, an audio signal output method is provided, including:

When the terminal participates in multi-channel format cooperation to output an audio signal, determine the channel signal that the terminal needs to output;

When it is determined that the terminal needs to output a preset channel signal of the audio signal, mixing a channel signal corresponding to the preset channel signal in the audio signal into the preset channel signal, A mixed channel signal is obtained; wherein, the preset channel signal is at least one of a left rear channel signal and a right rear channel signal; and

performing low-frequency enhancement processing on the mixed channel signal to obtain a low-frequency enhanced channel signal;

and outputting the low-frequency enhanced channel signal.

With reference to the first aspect, in a first possible implementation manner, before outputting the low-frequency enhanced channel signal, the method further includes:

performing loudness control processing on the low-frequency enhanced channel signal;

Said outputting the channel signal after said low-frequency enhancement is specifically:

Outputting the low-frequency enhanced channel signal processed by the loudness control.

In combination with the first aspect, or the first possible implementation of the first aspect, in the second possible implementation, when the terminal participates in the five-channel format cooperation to output an audio signal, if it is determined that the terminal needs to output When the preset channel signal is the left rear channel signal, the channel signal corresponding to the preset channel signal includes at least one of the left channel signal and the center channel signal; if it is determined that the terminal needs to output When the preset channel signal is a right rear channel signal, the channel signal corresponding to the preset channel signal includes at least one of a right channel signal and a center channel signal;

When the terminal participates in the seven-channel format cooperation to output an audio signal, if it is determined that the preset channel signal that the terminal needs to output is the left rear channel signal, then the channel signal corresponding to the preset channel signal Including at least one of the left channel signal, the front left channel signal and the center channel signal; if it is determined that the preset channel signal that the terminal needs to output is the right rear channel signal, then the The channel signal corresponding to the signal includes at least one of a right channel signal, a front right channel signal and a center channel signal.

With reference to the first aspect, in a third possible implementation manner, the low-frequency enhancement processing is performed on the mixed channel signal to obtain the low-frequency enhanced channel signal, which specifically includes:

Obtaining a low-frequency signal in the mixed channel signal, and enhancing the low-frequency signal to obtain an enhanced low-frequency signal; and

Obtaining a high-frequency signal in the preset channel signal;

A low-frequency enhanced channel signal is determined based on the enhanced low-frequency signal and the high-frequency signal.

With reference to the third possible implementation manner of the first aspect, in a fourth possible implementation manner, before determining the low-frequency enhanced channel signal based on the enhanced low-frequency signal and the high-frequency signal, further comprising: :

performing tone color control processing on the enhanced low-frequency signal;

The determination of the low-frequency enhanced channel signal based on the enhanced low-frequency signal and the high-frequency signal is specifically:

A low-frequency enhanced channel signal is determined based on the enhanced low-frequency signal processed by the timbre control and the high-frequency signal.

In a second aspect, an audio signal output device is provided, comprising:

A determination unit, configured to determine the channel signal that the terminal needs to output when the terminal participates in multi-channel format cooperation to output an audio signal;

A signal processing unit, configured to mix the audio signal with the preset channel signal into the preset channel signal when it is determined that the terminal needs to output the preset channel signal of the audio signal The corresponding channel signal is obtained as a mixed channel signal; wherein, the preset channel signal is at least one of the left rear channel signal and the right rear channel signal; and the mixed sound The low-frequency enhancement processing is performed on the channel signal to obtain the low-frequency enhanced channel signal;

An output unit, configured to output the low-frequency enhanced channel signal.

With reference to the second aspect, in a first possible implementation manner, the signal processing unit is further configured to perform loudness control on the low-frequency enhanced channel signal before outputting the low-frequency enhanced channel signal deal with;

The output unit is specifically configured to output the low-frequency enhanced channel signal processed by the loudness control.

With reference to the second aspect, or the first possible implementation of the second aspect, in the second possible implementation, when the terminal participates in the five-channel format cooperative output of an audio signal, if the determining unit determines that the When the preset channel signal that the terminal needs to output is the left rear channel signal, the channel signal corresponding to the preset channel signal includes at least one of the left channel signal and the center channel signal; if the When the determining unit determines that the preset channel signal to be output by the terminal is a right rear channel signal, the channel signal corresponding to the preset channel signal includes at least one of a right channel signal and a center channel signal ;

When the terminal participates in the cooperation of the seven-channel format to output an audio signal, if the determination unit determines that the preset channel signal to be output by the terminal is the left rear channel signal, it corresponds to the preset channel signal The channel signal includes at least one of a left channel signal, a front left channel signal, and a center channel signal; if the determining unit determines that the preset channel signal that the terminal needs to output is a right rear channel signal, Then the channel signal corresponding to the preset channel signal includes at least one of a right channel signal, a front right channel signal and a center channel signal.

With reference to the second aspect, in a third possible implementation manner, the signal processing unit is specifically configured to acquire a low-frequency signal in the mixed channel signal, and enhance the low-frequency signal to obtain an enhanced and obtaining a high-frequency signal in the preset channel signal; and determining a low-frequency enhanced channel signal based on the enhanced low-frequency signal and the high-frequency signal.

With reference to the third possible implementation manner of the second aspect, in a fourth possible implementation manner, the signal processing unit is further configured to determine a low-frequency enhancement based on the enhanced low-frequency signal and the high-frequency signal Before the enhanced channel signal, perform timbre control processing on the enhanced low-frequency signal; the signal processing unit is specifically configured to determine the low-frequency signal based on the enhanced low-frequency signal and the high-frequency signal after the timbre control process. Enhanced channel signal.

According to the audio signal output method provided in the first aspect, and the audio signal output device provided in the second aspect, when the terminal participates in multi-channel format cooperative output of an audio signal, when it is determined that the terminal needs to output the preset sound of the audio signal When the channel signal is used, the preset channel signal is mixed with other channel signals, and then output after low-frequency enhancement processing. Not only can the low-frequency signal in the preset channel signal be enhanced, but the low-frequency signal in other channel signals It can also be enhanced, so the terminal that needs to output the other channel signals of the audio signal can directly output without further low-frequency enhancement processing, and the preset channel signal is at least one of the left rear channel signal and the right rear channel signal One, that is, in this solution, the low-frequency enhancement of the front channel signal can be realized in the low-frequency enhancement processing of the rear channel signal, and the terminal that needs to output the front channel signal of the audio signal can directly output without low-frequency enhancement processing, so The phase of the front channel signal will not be changed, thereby improving the effect when multiple terminals cooperatively output an audio signal in a multi-channel format.

Description of drawings

The accompanying drawings are used to provide a further understanding of the present invention, and constitute a part of the description, and are used together with the embodiments of the present invention to explain the present invention, and do not constitute a limitation to the present invention. In the attached picture:

FIG. 1 is a schematic diagram of five terminals cooperatively outputting an audio signal in a five-channel format;

FIG. 2 is a flowchart of an audio signal output method provided by an embodiment of the present invention;

FIG. 3 is a detailed flowchart of an audio signal output method provided by an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of an audio signal output device provided by an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a terminal provided by an embodiment of the present invention.

detailed description

In order to provide an implementation plan for improving the effect of multiple terminals cooperatively outputting an audio signal in a multi-channel format, an embodiment of the present invention provides an audio signal output method and device. The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. Note, it should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, not to limit the present invention. And in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

An embodiment of the present invention provides an audio signal output method, as shown in FIG. 2 , including:

Step 201. When the terminal participates in multi-channel format cooperation to output an audio signal, it determines the channel signal that the terminal needs to output.

Step 202. When it is determined that the terminal needs to output the preset channel signal of the audio signal, mix the channel signal corresponding to the preset channel signal in the audio signal into the preset channel signal to obtain a mixed A rear channel signal; wherein, the preset channel signal is at least one of a left rear channel signal and a right rear channel signal.

Step 203: Perform low-frequency enhancement processing on the mixed channel signal to obtain a low-frequency enhanced channel signal.

Step 204, output the low-frequency enhanced channel signal.

Further, when it is determined that the terminal needs to output a channel signal other than the preset channel signal of the audio signal, it can directly output it.

The above-mentioned terminal may specifically be a mobile phone, a tablet computer, and the like.

The above audio signal output method is applicable to the application scenario when multiple terminals cooperatively output an audio signal in a multi-channel format, for example, when multiple terminals cooperatively output an audio signal in a five-channel format, or multiple terminals adopt a seven-channel format When outputting an audio signal collaboratively.

Further, when the terminal participates in the five-channel format cooperation to output an audio signal, if it is determined that the preset channel signal that the terminal needs to output is the left rear channel signal, the channel corresponding to the preset channel signal The signal includes at least one of a left channel signal and a center channel signal; if it is determined that the preset channel signal that the terminal needs to output is a right rear channel signal, then the channel signal corresponding to the preset channel signal includes at least one of a right channel signal and a center channel signal;

Further, when the terminal participates in the seven-channel format cooperation to output an audio signal, if it is determined that the preset channel signal that the terminal needs to output is the left rear channel signal, then the channel corresponding to the preset channel signal The signal includes at least one of the left channel signal, the front left channel signal and the middle channel signal; if it is determined that the preset channel signal that the terminal needs to output is the right rear channel signal, then the preset channel signal The corresponding channel signal includes at least one of a right channel signal, a front right channel signal and a center channel signal.

Since the low-frequency enhancement processing may change the loudness of the original sound channel signal, in order to prevent the loudness of the output sound channel signal from being too small or too large, preferably, before outputting the low-frequency enhanced sound channel signal in step 204, it is also included. Loudness control processing is performed on the channel signal after low-frequency enhancement. At this time, step 204 is specifically to output the low-frequency enhanced channel signal after the loudness control processing.

Step 203 performs low-frequency enhancement processing on the mixed channel signal, which can be specifically:

Obtain the low-frequency signal in the mixed channel signal, and enhance the low-frequency signal to obtain the enhanced low-frequency signal; and obtain the high-frequency signal in the preset channel signal; based on the enhanced low-frequency signal and The high frequency signal determines the low frequency enhanced channel signal.

Specifically, the low-frequency signal in the mixed channel signal can be enhanced based on the following formula to obtain the enhanced low-frequency signal:

x_lp_2[i]=x_lp[i]+x_lp[i]×x_lp[i];

Wherein, x_lp_2[i] is the enhanced low-frequency signal; x_lp[i] is the low-frequency signal in the mixed channel signal.

Specifically, the channel signal after low-frequency enhancement can be determined based on the following formula:

y[i]=x_hp[i]+boost_f×x_lp_2[i];

Among them, y[i] is the low-frequency enhanced channel signal; x_hp[i] is the high-frequency signal in the preset channel signal; boost_f is the low-frequency enhancement factor.

Preferably, before determining the low-frequency enhanced channel signal based on the enhanced low-frequency signal and the high-frequency signal, it further includes performing tone color control processing on the enhanced low-frequency signal. At this time, the low-frequency enhanced channel signal is determined based on the enhanced low-frequency signal and the high-frequency signal, specifically, the low-frequency enhanced channel signal is determined based on the enhanced low-frequency signal and the high-frequency signal after the timbre control process. Signal.

The method and device provided by the present invention will be described in detail with specific embodiments below, taking multiple terminals cooperatively outputting an audio signal in a five-channel format in conjunction with the accompanying drawings as an example.

Figure 3 is a detailed flowchart of the audio signal output method provided by the embodiment of the present invention, specifically including:

Step 301. Determine the channel signal to be output by the terminal.

In the embodiment of the present invention, five terminals cooperatively output one audio signal in a five-channel format, and each terminal needs to output one channel signal. In other embodiments of the present invention, more than five terminals may cooperatively output one audio signal in a five-channel format, and at this time, multiple terminals may jointly output one channel signal.

Which channel signal the terminal needs to output can be set by the user, or can be determined by the terminal according to its own location. For example, the face recognition technology in the prior art can be used to obtain the user image by the terminal, and according to the obtained user image, it can be determined that it is in the front, left front, right front, left rear or right rear of the user, and then determine the needs Output center channel signal, left channel signal, right channel signal, left rear channel signal or right rear channel signal.

In the embodiment of the present invention, the preset channel signal is a left rear channel signal and a right rear channel signal.

Therefore, when it is determined that the terminal needs to output the left channel signal, the middle channel signal or the right channel signal of the audio signal, enter step 302; when it is determined that the terminal needs to output the left rear channel signal or the right rear channel signal of the audio signal , go to step 303.

Step 302, directly output the corresponding channel signal in the audio signal, and the process ends.

Step 303 , mixing a certain proportion of other signals into the preset channel signal to obtain a mixed channel signal.

In the embodiment of the present invention, a certain proportion of the left preset channel signal can be mixed into the left rear channel signal to obtain a mixed left rear channel signal; a certain proportion of the right sound channel can be mixed into the right rear channel signal. channel signal to obtain the right rear channel signal after mixing.

Taking the left rear channel signal in_LS[i] mixed into a certain proportion of the left preset channel signal in_L[i] as an example, the mixed left channel signal in_LS2[i] can be obtained based on the following formula:

in_LS2[i]=a×in_LS[i]+b×in_L[i];

Wherein, a is the weighting factor of the left rear channel signal in_LS[i], and b is the weighting factor of the left channel signal in_L[i]. And, both a and b are positive real numbers less than 1, a>b and a+b=1.

During specific implementation, a and b may be specifically set according to actual conditions and user requirements. In the embodiment of the present invention, a=0.8, b=0.2.

Step 304: Obtain the low-frequency signal in the mixed channel signal, and enhance it to obtain the enhanced low-frequency signal.

Specifically, the mixed channel signal can be low-pass filtered to obtain the low-frequency signal in the mixed channel signal, and there are many ways to enhance the low-frequency signal in the prior art. In the embodiment of the present invention, Taking the enhancement of the low-frequency signal x_llp[i] in the mixed left rear channel signal as an example, the enhanced low-frequency signal x_llp_2[i] can be obtained based on the following formula:

x_llp_2[i]=x_llp[i]+x_llp[i]×x_llp[i].

The cutoff frequency point of the high-pass filter and the low-pass filter may be selected as the upper limit of the frequency band where the terminal exhibits poor performance to low-frequency signals, which may be 500 Hz in the embodiment of the present invention.

Step 305 , performing tone color control processing on the enhanced low frequency signal to obtain a tone color controlled low frequency signal.

In order to prevent the output audio signal from being too sharp, in this step, low-pass filtering can be performed on the enhanced low-frequency signal to realize timbre control, and obtain the timbre-controlled low-frequency signal.

Step 306. Obtain a high-frequency signal in the preset channel signal.

Specifically, high-pass filtering may be performed on the preset channel signal to obtain the high-frequency signal therein.

The above-mentioned steps 304-305 and step 306 do not have a necessary sequence, and in other embodiments of the present invention, step 306 may be executed first, followed by steps 304-305.

Step 307: Determine a low-frequency enhanced channel signal based on the timbre-controlled low-frequency signal and the high-frequency signal.

Taking the low-frequency signal x_llp_nlp[i] after the timbre control corresponding to the left rear channel signal and the high-frequency signal x_lhp[i] in the left rear channel signal to determine the low-frequency enhanced left rear channel signal yl[i] as an example , specifically, the low-frequency enhanced left rear channel signal yl[i] can be determined based on the following formula:

yl[i]=x_lhp[i]+boost_f×x_llp_nlp[i];

Wherein, boost_f is a low-frequency enhancement factor, which is a positive real number greater than 1.

During specific implementation, boost_f can be specifically set according to the actual situation and user needs. In the embodiment of the present invention, boost_f=2.

Step 308: Perform loudness control processing on the low-frequency enhanced channel signal to obtain a loudness-controlled channel signal.

In this step, the loudness control processing may specifically adopt any loudness control implementation manner in the prior art.

Taking the loudness control processing of the left rear channel signal yl[i] after low-frequency enhancement as an example, yl[i] can be multiplied by a loudness control factor f to obtain the left rear channel signal yl'[i after loudness control ]=f×yl[i], choose the appropriate loudness control factor f to make yl'[i] fall within the allowed value range.

Loudness control processing can also be performed based on the following formula:

Wherein, thr1 is the loudness enhancement threshold, ratio1 is the loudness enhancement scale factor, which is a positive real number greater than 1; in the embodiment of the present invention, ratio1=2; thr2 is the loudness weakening threshold, and ratio2 is the loudness weakening scale factor, which is greater than 1 positive real number. In the embodiment of the present invention, ratio2=3.

Step 309 , output the loudness-controlled channel signal, and the process ends.

It can be seen that, using the method provided by the embodiment of the present invention, in the above example, the terminal that needs to output the left rear channel signal of the audio signal mixes the left rear channel signal into the left channel signal and then performs low frequency enhancement processing, and needs to output the audio signal The terminal of the right rear channel signal mixes the right rear channel signal into the right channel signal and then performs low-frequency enhancement processing, which not only enhances the low-frequency signals of the left rear channel signal and the right rear channel signal, but also makes the left The low-frequency signals of the channel signal and the right channel signal have been enhanced, and the terminal that needs to output the left channel signal, the middle channel signal and the right channel signal does not need to perform low-frequency enhancement processing operations, so the left channel output by the terminal The phases of the signal, the center channel signal and the right channel signal will not change, which improves the effect when multiple terminals use the multi-channel format to collaboratively output an audio signal, and will not cause changes in the position information of the listener's auditory perception, which improves the User experience.

In the above embodiments of the present invention, the left rear channel signal is mixed into the left channel signal, and the right rear channel signal is mixed into the right channel signal. In another embodiment of the present invention, a similar method can also be adopted to mix the left rear channel signal into the left channel signal and the center channel signal at the same time, and the sum of the weighting factors of each signal is 1, for example, the left rear channel signal The weighting factor of the left channel signal is 0.7, the weighting factor of the left channel signal is 0.2, and the weighting factor of the middle channel signal is 0.1; adopt the same method to mix the right rear channel signal into the right channel signal and the center channel signal at the same time. At this time, the low-frequency signal in the center channel signal is also enhanced.

Based on the same inventive concept, according to the audio signal output method provided by the above-mentioned embodiments of the present invention, correspondingly, the embodiment of the present invention also provides an audio signal output device, the structural diagram of which is shown in Figure 4, specifically including:

The determination unit 401 is used to determine the channel signal that the terminal needs to output when the terminal participates in multi-channel format cooperation to output an audio signal;

A signal processing unit 402, configured to mix a channel corresponding to the preset channel signal in the audio signal into the preset channel signal when it is determined that the terminal needs to output the preset channel signal of the audio signal signal, to obtain a mixed channel signal; wherein, the preset channel signal is at least one of the left rear channel signal and the right rear channel signal; and low-frequency enhancement processing is performed on the mixed channel signal , to obtain the low-frequency enhanced channel signal;

The output unit 403 is configured to output the low frequency enhanced channel signal.

Preferably, the signal processing unit 402 is further configured to perform loudness control processing on the low-frequency enhanced channel signal before outputting the low-frequency enhanced channel signal;

The output unit 403 is specifically configured to output the low frequency enhanced channel signal after the loudness control processing.

Further, when the terminal participates in the five-channel format cooperation to output an audio signal, if the determining unit 401 determines that the preset channel signal that the terminal needs to output is the left rear channel signal, then the corresponding preset channel signal The channel signal includes at least one of the left channel signal and the center channel signal; if the determination unit 401 determines that the preset channel signal that the terminal needs to output is the right rear channel signal, then the preset channel signal The corresponding channel signal includes at least one of a right channel signal and a center channel signal;

When the terminal participates in the seven-channel format cooperation to output an audio signal, if the determining unit 401 determines that the preset channel signal that the terminal needs to output is the left rear channel signal, then the channel corresponding to the preset channel signal The signal includes at least one of a left channel signal, a front left channel signal, and a center channel signal; if the determination unit 401 determines that the preset channel signal that the terminal needs to output is a right rear channel signal, then The channel signal corresponding to the channel signal includes at least one of a right channel signal, a front right channel signal and a center channel signal.

Further, the signal processing unit 402 is specifically configured to obtain the low-frequency signal in the mixed channel signal, and enhance the low-frequency signal to obtain the enhanced low-frequency signal; and obtain the low-frequency signal in the preset channel signal. A high-frequency signal; determining a low-frequency enhanced channel signal based on the enhanced low-frequency signal and the high-frequency signal.

Preferably, the signal processing unit 402 is further configured to perform timbre control processing on the enhanced low-frequency signal before determining the low-frequency enhanced channel signal based on the enhanced low-frequency signal and the high-frequency signal; the signal processing unit 402, specifically for determining a low-frequency enhanced channel signal based on the enhanced low-frequency signal processed by the timbre control and the high-frequency signal.

The functions of the above units may correspond to the corresponding processing steps in the flow shown in FIG. 2 or FIG. 3 , and will not be repeated here.

Referring to FIG. 5, the present invention also provides a terminal, including a receiver 501, a memory 502, a processor 503, and a transmitter 504, wherein:

The receiver 501 is configured to receive the audio signal when the terminal participates in multi-channel format cooperative output of an audio signal, and send the audio signal to the processor 503;

memory 502, for storing application programs;

The processor 503 is configured to invoke the application program stored in the memory 502 to perform the following operations:

Determine the channel signal that the terminal needs to output; when it is determined that the terminal needs to output the preset channel signal of the audio signal, mix the audio signal into the preset channel signal corresponding to the preset channel signal channel signal to obtain a mixed channel signal; wherein, the preset channel signal is at least one of the left rear channel signal and the right rear channel signal; and the mixed channel signal is performed Low-frequency enhancement processing to obtain the channel signal after low-frequency enhancement;

The transmitter 504 is configured to output the low-frequency enhanced channel signal.

Preferably, the processor 503 is further configured to perform loudness control processing on the low-frequency enhanced channel signal before outputting the low-frequency enhanced channel signal;

The transmitter 504 is specifically configured to output the low-frequency enhanced channel signal after the loudness control processing.

Further, when the terminal participates in the five-channel format cooperation to output an audio signal, if the processor 503 determines that the preset channel signal to be output by the terminal is the left rear channel signal, then the corresponding preset channel signal The channel signal includes at least one of the left channel signal and the center channel signal; if the processor 503 determines that the preset channel signal that the terminal needs to output is the right rear channel signal, The corresponding channel signal includes at least one of a right channel signal and a center channel signal;

When the terminal participates in the seven-channel format cooperation to output an audio signal, if the processor 503 determines that the preset channel signal to be output by the terminal is the left rear channel signal, the channel corresponding to the preset channel signal The signal includes at least one of a left channel signal, a front left channel signal, and a center channel signal; if the processor 503 determines that the preset channel signal that the terminal needs to output is a right rear channel signal, then the preset The channel signal corresponding to the channel signal includes at least one of a right channel signal, a front right channel signal and a center channel signal.

Further, the processor 503 is specifically configured to acquire the low-frequency signal in the mixed channel signal, and enhance the low-frequency signal to obtain the enhanced low-frequency signal; and acquire the high-frequency signal in the preset channel signal. a frequency signal; and determine a low-frequency enhanced channel signal based on the enhanced low-frequency signal and the high-frequency signal.

Preferably, the processor 503 is further configured to perform timbre control processing on the enhanced low-frequency signal before determining the low-frequency enhanced channel signal based on the enhanced low-frequency signal and the high-frequency signal; the processor 503, Specifically, it is used to determine the low-frequency enhanced channel signal based on the enhanced low-frequency signal processed by the tone color control and the high-frequency signal.

To sum up, in the embodiment of the present invention, when the terminal participates in multi-channel format cooperation to output an audio signal, it determines the channel signal that the terminal needs to output; when it is determined that the terminal needs to output the preset sound of the audio signal channel signal, the channel signal corresponding to the preset channel signal in the audio signal is mixed into the preset channel signal to obtain the mixed channel signal; wherein, the preset channel signal is the left rear At least one of the channel signal and the right rear channel signal; performing low-frequency enhancement processing on the mixed channel signal to obtain a low-frequency enhanced channel signal; outputting the low-frequency enhanced channel signal. By adopting the solution provided by the embodiment of the present invention, the effect of multiple terminals cooperatively outputting an audio signal in a multi-channel format can be improved, thereby improving user experience.

Those skilled in the art should understand that the embodiments of the present invention may be provided as methods, systems, or computer program products. Accordingly, the present invention can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It should be understood that each procedure and/or block in the flowchart and/or block diagram, and combinations of procedures and/or blocks in the flowchart and/or block diagram can be realized by computer program instructions. These computer program instructions may be provided to a general purpose computer, special purpose computer, embedded processor, or processor of other programmable data processing equipment to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing equipment produce a Means for realizing the functions specified in one or more steps of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to operate in a specific manner, such that the instructions stored in the computer-readable memory produce an article of manufacture comprising instruction means, the instructions The device realizes the function specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions can also be loaded onto a computer or other programmable data processing device, causing a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process, thereby The instructions provide steps for implementing the functions specified in the flow chart flow or flows and/or block diagram block or blocks.

While preferred embodiments of the invention have been described, additional changes and modifications to these embodiments can be made by those skilled in the art once the basic inventive concept is appreciated. Therefore, it is intended that the appended claims be construed to cover the preferred embodiment as well as all changes and modifications which fall within the scope of the invention.

Apparently, those skilled in the art can make various changes and modifications to the embodiments of the present invention without departing from the spirit and scope of the embodiments of the present invention. In this way, if the modifications and variations of the embodiments of the present invention fall within the scope of the claims of the present invention and equivalent technologies, the present invention also intends to include these modifications and variations.

Claims (10)

1. an audio frequency signal output, it is characterised in that including:

Terminal, when participating in multi-channel format cooperation one audio signal of output, determines that described terminal needs output Sound channel signal；

When determine that described terminal needs output be the default sound channel signal of described audio signal time, described pre- If sound channel signal is mixed in described audio signal the sound channel signal corresponding with described default sound channel signal, obtain Sound channel signal after audio mixing；Wherein, described default sound channel signal is left subsequent channel signal and rear right channel signal In at least one；Sound channel signal corresponding with described left subsequent channel signal in described audio signal includes left sound At least one in road signal, front left channel signals and middle sound channel signal；With the described right side in described audio signal The sound channel signal that rear sound channel signal is corresponding includes in right-channel signals, front right-channel signals and middle sound channel signal At least one；And

Sound channel signal after described audio mixing is carried out low frequency enhancement process, obtains low frequency enhanced sound channel letter Number；

Export the enhanced sound channel signal of described low frequency.

2. the method for claim 1, it is characterised in that at the output enhanced sound of described low frequency Before road signal, also include:

Sound channel signal enhanced to described low frequency carries out loudness control process；

The enhanced sound channel signal of the described low frequency of described output, particularly as follows:

Export the enhanced sound channel signal of low frequency processed through described loudness control.

3. method as claimed in claim 1 or 2, it is characterised in that when terminal is participating in five-sound channel lattice During formula cooperation one audio signal of output, however, it is determined that described terminal needs the default sound channel signal of output to be left back During sound channel signal, then corresponding with described default sound channel signal sound channel signal includes left channel signals and middle sound channel At least one in signal；If it is determined that the default sound channel signal that described terminal needs output is rear right channel signal Time, then corresponding with described default sound channel signal sound channel signal includes in right-channel signals and middle sound channel signal At least one；

When terminal is when participating in seven-channel form cooperation one audio signal of output, however, it is determined that described terminal needs When the default sound channel signal of output is left subsequent channel signal, then corresponding with described default sound channel signal sound channel letter Number include at least one in left channel signals, front left channel signals and middle sound channel signal；If it is determined that described end When end needs the default sound channel signal of output to be rear right channel signal, then corresponding with described default sound channel signal Sound channel signal includes at least one in right-channel signals, front right-channel signals and middle sound channel signal.

4. the method for claim 1, it is characterised in that described to the sound channel letter after described audio mixing Number carry out low frequency enhancement process, obtain the enhanced sound channel signal of low frequency, specifically include:

Obtain the low frequency signal in the sound channel signal after described audio mixing, and described low frequency signal strengthened, Obtain enhanced low frequency signal；And

Obtain the high-frequency signal in described default sound channel signal；

The enhanced sound channel signal of low frequency is determined based on described enhanced low frequency signal and described high-frequency signal.

5. method as claimed in claim 4, it is characterised in that believing based on described enhanced low frequency Before number determining the enhanced sound channel signal of low frequency with described high-frequency signal, also include:

Described enhanced low frequency signal is carried out tone color control process；

Described determine the enhanced sound channel of low frequency based on described enhanced low frequency signal and described high-frequency signal Signal, particularly as follows:

Determine low based on the enhanced low frequency signal processed through described tone color control with described high-frequency signal The most enhanced sound channel signal.

6. an audio signal output device, it is characterised in that including:

Determine unit, for terminal when participating in multi-channel format cooperation one audio signal of output, determine institute State terminal and need the sound channel signal of output；

Signal processing unit, for being the default sound of described audio signal when determine that described terminal needs output During road signal, it is mixed in described audio signal in described default sound channel signal and described default sound channel signal pair The sound channel signal answered, obtains the sound channel signal after audio mixing；Wherein, described default sound channel signal is left subsequent channel At least one in signal and rear right channel signal；In described audio signal corresponding with described left subsequent channel signal Sound channel signal include at least one in left channel signals, front left channel signals and middle sound channel signal；Described Sound channel signal corresponding with described rear right channel signal in audio signal includes that right-channel signals, front R channel are believed Number and middle sound channel signal at least one；And the sound channel signal after described audio mixing is carried out at low frequency enhancing Reason, obtains the enhanced sound channel signal of low frequency；

Output unit, is used for exporting the enhanced sound channel signal of described low frequency.

7. device as claimed in claim 6, it is characterised in that described signal processing unit, is additionally operable to Before the output enhanced sound channel signal of described low frequency, sound channel signal enhanced to described low frequency rings Degree control processes；

Described output unit, the enhanced sound channel of low frequency processed through described loudness control specifically for output Signal.

Device the most as claimed in claims 6 or 7, it is characterised in that when terminal is participating in five-sound channel lattice During formula cooperation one audio signal of output, determine that unit determines that described terminal needs the default sound of output if described When road signal is left subsequent channel signal, then corresponding with described default sound channel signal sound channel signal includes L channel At least one in signal and middle sound channel signal；Determine that unit determines that described terminal needs the pre-of output if described If sound channel signal is rear right channel signal, then corresponding with described default sound channel signal sound channel signal includes the right side At least one in sound channel signal and middle sound channel signal；

When terminal is when participating in seven-channel form cooperation one audio signal of output, determine that unit determines if described When described terminal needs the default sound channel signal of output to be left subsequent channel signal, then with described default sound channel signal Corresponding sound channel signal includes at least one in left channel signals, front left channel signals and middle sound channel signal； Determine that unit determines when described terminal needs the default sound channel signal of output to be rear right channel signal, then if described The sound channel signal corresponding with described default sound channel signal includes right-channel signals, front right-channel signals and middle sound channel At least one in signal.

9. device as claimed in claim 6, described signal processing unit, described mixed specifically for obtaining The low frequency signal in sound channel signal after sound, and described low frequency signal is strengthened, obtain enhanced low Frequently signal；And obtain the high-frequency signal in described default sound channel signal；Believe based on described enhanced low frequency Number with described high-frequency signal determine the enhanced sound channel signal of low frequency.

10. device as claimed in claim 9, it is characterised in that described signal processing unit, is additionally operable to Based on described enhanced low frequency signal and described high-frequency signal determine the enhanced sound channel signal of low frequency it Before, described enhanced low frequency signal is carried out tone color control process；Described signal processing unit, specifically uses In determining low frequency based on the enhanced low frequency signal processed through described tone color control and described high-frequency signal Enhanced sound channel signal.