WO2017210856A1

WO2017210856A1 - Method of controlling audio output, user terminal, and radio terminal

Info

Publication number: WO2017210856A1
Application number: PCT/CN2016/085102
Authority: WO
Inventors: 李世超
Original assignee: 海能达通信股份有限公司
Priority date: 2016-06-07
Filing date: 2016-06-07
Publication date: 2017-12-14

Abstract

The invention provides a method of controlling an audio output. The method comprises: acquiring a terminal identifier of a transmission terminal; determining a relative distance from the transmission terminal; and when it is determined, according to the determined relative distance, that the present communication is a short-distance communication, suppressing an output signal at an audio frequency. Also provided are a user terminal and a radio terminal. The method of controlling an audio output, the user terminal, and the radio terminal can effectively prevent a squeak, and prevent quality of an output audio from being damaged.

Description

Method for controlling audio output, user terminal and walkie-talkie terminal

Technical field

The present invention relates to the field of communications technologies, and in particular, to a method for controlling audio output, a user terminal, and a walkie-talkie terminal.

Background technique

When the receiving terminal participating in the call is in a close state with the transmitting terminal, the audio output by the receiving terminal is collected by the microphone of the transmitting terminal to form a positive feedback, thereby generating a howling.

In the short-distance state, the input signal collected by the receiving terminal through the microphone includes the useful signal and the howling signal. Therefore, the receiving terminal will detect whether there is a howling signal in the input signal, and if so, modify according to the audio characteristics of the howling signal. The corresponding filter removes the howling signal from the input signal to achieve the purpose of suppressing or reducing howling.

The above processing is performed after the howling is generated, instead of preventing it in advance, so that the audio quality of the useful signal is damaged after the howling signal is filtered by the filter.

Summary of the invention

Based on this, it is necessary to provide a method of controlling the audio output that can effectively prevent howling generation and avoid impaired audio quality of the output during the call.

In addition, it is also necessary to provide a user terminal capable of effectively preventing howling generation and avoiding audio quality deterioration of the output.

In addition, it is also necessary to provide a walkie-talkie terminal that can effectively prevent howling and avoids the audio quality of the call during which the audio quality of the output is impaired.

In order to solve the above technical problems, the following technical solutions will be adopted:

A method of controlling an audio output, the method being performed by a receiving terminal, the method comprising:

Obtaining a terminal identifier of the sending terminal;

Detecting the relative distance from the transmitting terminal during the call;

The outputted audio is suppressed when the call is determined to be a close call according to the detected relative distance.

Further, the method further includes:

Determining whether the time interval of the distance detection relative to the current time reaches a preset interval, and if yes,

The step of detecting the relative distance from the transmitting terminal during the call is performed again.

Further, when the determining that the call is a close-range call according to the detected relative distance, the step of suppressing the outputted audio includes:

Determining whether the detected relative distance is less than a first distance threshold, and if yes, determining that the call is a close distance call;

When it is determined that the call is a close call, the output audio volume is reduced or turned off.

Further, the step of triggering the reduction or closing of the audio volume outputted in the call by the determination result of the short-range call includes:

Determining whether the detected relative distance is less than a second distance threshold, and if so, turning off the output audio volume; if not, then

Decreasing the audio volume of the output;

The second distance threshold is smaller than the first distance threshold.

Further, when the determining that the call is a close-range call according to the detected relative distance, the step of suppressing the outputted audio further includes:

The volume reduction value is obtained according to a negative correlation between the detected relative distance and a volume decrease value, and the audio volume is decreased according to the volume decrease value.

A user terminal, the receiving terminal comprising:

a terminal identifier obtaining module, configured to acquire a terminal identifier of the sending terminal;

a relative distance detecting module, configured to detect a relative distance from the transmitting terminal during a call;

The audio output control module is configured to suppress the output audio when the call is a close call according to the detected relative distance.

Further, the user terminal further includes:

a period detecting module, configured to determine whether the time interval of the distance detection relative to the current time reaches a preset interval, and if yes,

The relative distance detecting module is notified.

Further, the audio output control module includes:

a call determining unit, configured to determine whether the detected relative distance is smaller than a first distance threshold, and if yes, determine that the call is a close-range call;

Control execution unit for determining whether to reduce or turn off the output audio when the call is a close call volume.

Further, the control execution unit is further configured to determine whether the detected relative distance is less than a second distance threshold.

If yes, the audio volume of the output is turned off; if not, then

Decreasing the audio volume of the output;

The second distance threshold is smaller than the first distance threshold.

Further, the audio output control module is further configured to obtain the volume decrease value according to a negative correlation between the detected relative distance and a volume decrease value, and reduce the audio according to the volume decrease value. volume.

A walkie-talkie terminal comprising at least one processor, at least one mobile communication radio frequency component, a memory and at least one communication bus, wherein the memory stores program code, and the processor is configured to call program code stored in the memory for execution The following operations:

Obtaining a terminal identifier of the sending terminal;

Detecting the relative distance from the transmitting terminal during the call;

Further, the processor also performs the following operations:

The operation of detecting the relative distance from the transmitting terminal during the call is performed again.

Further, the processor performs the operation of suppressing the outputted audio when the call is a close-range call according to the detected relative distance, and includes:

Further, the operation performed by the processor to suppress the output audio includes:

Decreasing the audio volume of the output;

The second distance threshold is smaller than the first distance threshold.

The volume decrease value is obtained according to a negative correlation between the detected relative distance and the volume decrease value, and the audio volume is decreased according to the volume decrease value.

Similar to the attenuation of the volume by the distance between the receiving terminal and the transmitting terminal, it can be known from the above technical solution that when the receiving terminal and the transmitting terminal make a close call, the audio output by the receiving terminal is transmitted to the receiving terminal. When the microphone of the terminal is sent, the volume is also small enough, even reduced to zero, so that it does not cause self-excited howling, effectively preventing the occurrence of howling and not damaging the audio quality of the output of the receiving terminal.

DRAWINGS

1 is a schematic diagram of a process of a call between a receiving terminal and a transmitting terminal in the prior art;

2 is a flow chart of a method of controlling audio output in one embodiment;

3 is a flowchart of a method for obtaining a terminal identifier of a transmitting terminal in an embodiment;

4 is a flow chart showing the steps of suppressing the outputted audio when the call is a close-range call according to the detected relative distance according to the detected relative distance;

FIG. 5 is a schematic diagram of a process of a call between a receiving terminal and a transmitting terminal in an embodiment; FIG.

6 is a schematic structural diagram of a user terminal in an embodiment;

7 is a schematic structural diagram of a terminal identifier acquiring module in an embodiment;

8 is a schematic structural diagram of an audio output control module in an embodiment;

FIG. 9 is a schematic structural diagram of an intercom terminal provided by the present invention.

detailed description

Exemplary embodiments embodying the features and advantages of the present invention will be described in detail in the following description. It is to be understood that the invention is capable of various modifications in the various embodiments and this invention.

As mentioned above, when two walkie-talkie terminals talk in close distance, the sound signal played by the receiving terminal speaker (SPK) is reflected and superimposed on the microphone (MIC) of the transmitting terminal, and the sound of the transmitting terminal's microphone will be reflected back. The signal is transmitted through the wireless link, and then played by the speaker of the receiving terminal, as shown in FIG. 1, such that the superimposed overlap will form a howling forward self-excited link between the transmitting terminal and the receiving terminal. In order to eliminate the influence of howling, it is necessary to perform a series of processing including filtering on the sound signal collected by the transmitting terminal microphone, thereby causing a drop in call quality.

In view of this, a method for controlling audio output is proposed, and the terminal participating in the call includes sending The terminal and the receiving terminal, the method is performed by the receiving terminal, so as to achieve the purpose of effectively preventing howling generation during the call and avoiding the audio quality of the output being damaged.

In one embodiment, specifically, the method is as shown in FIG. 2, including:

Step 210: Acquire a terminal identifier of the sending terminal.

The terminal identifier of the transmitting terminal is used to identify the identity of the transmitting terminal. For example, the sending terminal may be a walkie-talkie terminal as a transmitting side during a call, and correspondingly, the terminal identifier may be a number of the walkie-talkie terminal.

In step 230, the relative distance from the transmitting terminal is detected during the call.

The receiving terminal will detect the relative distance between it and the transmitting terminal. Specifically, the receiving terminal may obtain a relative distance between the receiving terminal and the transmitting terminal by using a wireless positioning technology according to the terminal identifier.

Among them, wireless positioning technology includes Bluetooth positioning, WIFI (Wireless Fidelity) positioning, RFID (Radio Frequency Identification)/NFC (Near Field Communication), and other near field wireless communication positioning, and GPS ( Global Positioning System (GPS) Positioning and Communication RF Signal Strength DMO (Direct Mode Operation), which will not be repeated here.

Step 250: When the call is determined to be a close call according to the detected relative distance, the outputted audio is suppressed.

According to the detected relative distance, the distance between the receiving terminal and the transmitting terminal can be known, and thus it is also confirmed whether the call between the receiving terminal and the transmitting terminal is a close-range call.

Since the distance is doubled, the sound is attenuated by 6 dB. Therefore, when the relative distance between the call terminals is relatively long, the horn sound of the receiving terminal is attenuated when it is transmitted to the microphone of the transmitting terminal, and the microphone of the transmitting terminal is collected and received. The speaker of the terminal has a small sound, and there is no self-excited howling.

When the relative distance between the call terminals is relatively close, the audio outputted by the receiving terminal, that is, the horn sound as described above, is suppressed by the implementation process as described above, so that the audio output by the receiving terminal is no longer collected by the microphone of the transmitting terminal. Thereby, the howling self-excited link is cut off, and the occurrence of howling is effectively avoided.

The method does not treat the howling after it occurs, but it is eliminated from the source when it may occur. Therefore, the method can completely retain the original sound without causing damage to the original sound quality.

In addition, the method saves a series of processing processes on the original sound, such as calculation of howling audio features, modification of filter parameters, filtering of sound signals, etc. Therefore, the method does not increase the delay of communication, and realizes It is less difficult and can adapt to different environments, which satisfies the needs of users for emergency communication and timely response.

As shown in FIG. 3, in another embodiment, the step 210 includes:

Step 211, receiving call signaling.

In the process of establishing a call, the receiving terminal receives the call signaling from the sending terminal, where the call signaling carries a terminal identifier for identifying the identity of the transmitting terminal.

Step 213: Extract the terminal identifier in the call signaling.

The receiving terminal extracts the terminal identifier from the call signaling and stores it until the sending terminal corresponding to the terminal identifier ends the call, and can read the stored terminal identifier as needed.

As shown in FIG. 4, in another embodiment, the step 250 includes:

Step 251, it is determined whether the detected relative distance is less than the first distance threshold, and if yes, proceeds to step 253;

Step 253, determining that the call is a close-range call;

In step 255, when the call is determined to be a close call, the output audio volume is reduced or turned off.

As shown in FIG. 5, when the detected relative distance is less than the preset first distance threshold l ₀ , the output audio volume is reduced or turned off, so that the MIC of the receiving terminal only collects the user's voice signal, and Only the sound signal played by the receiving terminal SPK is collected or not collected, which is equivalent to cutting off the forward self-excited link between the transmitting terminal and the receiving terminal.

In another embodiment, the output of the suppressed audio comprises:

Determining whether the detected relative distance is smaller than the second distance threshold, the second distance threshold is smaller than the first distance threshold, and if yes, turning off the output audio volume; if not, the detected relative distance is between the second distance threshold and the first Between a distance threshold, the output audio volume is reduced.

Further, when the detected relative distance is greater than the second distance threshold, the volume reduction value may also be obtained according to the negative correlation between the detected relative distance and the volume reduction value, and then the audio volume is decreased according to the volume reduction value. That is to say, when the detected relative distance is large, the volume reduction value is small; when the detected relative distance is small, the volume reduction value is large.

It should be noted that, based on the first distance threshold and the second distance threshold, more thresholds may be set, and the set more thresholds are sequentially decreased starting from the second distance threshold, thereby forming a plurality of different threshold intervals.

The multi-level reduction of the audio volume is achieved by the plurality of threshold intervals formed until it is reduced to zero.

In one embodiment, step 250 includes obtaining a volume reduction value based on a negative correlation between the detected relative distance and the volume reduction value, and decreasing the audio volume by the volume reduction value.

When it is determined that the call is a close-range call, the audio volume can be suppressed by this process, and the volume is continuously reduced until it is reduced to zero.

In a specific implementation, the audio volume suppression may be implemented by performing this process when it is determined that the detected relative distance is less than the first distance threshold, or may be implemented by performing this process when determining that the detected relative distance is less than the second distance threshold. Pressing, this process can also be performed at other distance thresholds, This is not limited here.

In another embodiment, the method as described above further comprises:

It is judged whether the time interval of the distance detection with respect to the current time reaches a preset interval, and if so, the step of detecting the relative distance from the transmitting terminal during the call is performed again.

When the terminal user moves around during the call, the relative distance of the receiving terminal to the transmitting terminal changes, and the intelligence of the audio output control can be improved by continuously monitoring and preventing the possibility of howling during the call.

In addition, the audio output from the receiving terminal is restored at the end of the call, ready for the next call, that is, if the output audio volume is reduced during the call, the output audio volume is increased accordingly.

Specifically, the sending terminal and the receiving terminal in this embodiment may be private network communication terminals, such as a walkie-talkie, a mobile phone with a talkback function, or a tablet computer.

The communication between the private network communication terminals has two modes: one call (one transmitting terminal and one receiving terminal) and one group call (one transmitting terminal and multiple receiving terminals); wherein, one call can be regarded as a special case of group call .

In the group call mode, each terminal in the same group may initiate a call as a transmitting terminal, and correspondingly, the remaining terminals serve as receiving terminals. When a receiving terminal in the group is in close proximity to the transmitting terminal, only the speaker volume of the receiving terminal is turned off or reduced, and the speaker volume of the remaining receiving terminals is not adjusted, so that the speaker sound of the receiving terminal can be avoided. The microphone of the transmitting terminal collects and generates howling, and does not affect the voice playing of the remaining receiving terminals, ensuring that each receiving terminal in the group call can obtain perfect original sound quality.

In one embodiment, to solve the above problem, a user terminal is also proposed. As shown in FIG. 6, the user terminal includes a terminal identity acquisition module 610, a proximity call determination module 630, and an audio output control module 650;

The terminal identifier obtaining module 610 is configured to acquire a terminal identifier of the sending terminal.

The relative distance detecting module 630 is configured to detect a relative distance from the transmitting terminal during the call;

The audio output control module 650 is configured to suppress the output audio when the call is a close call according to the detected relative distance.

As shown in FIG. 7, in another embodiment, the terminal identifier obtaining module 610 includes a signaling receiving unit 611 and a terminal identifier extracting unit 613; wherein:

The signaling receiving unit 611 is configured to receive call signaling initiated by the sending terminal.

The terminal identifier extracting unit 613 is configured to extract the terminal identifier in the call signaling.

In another embodiment, the user terminal further includes:

The period detecting module 670 is configured to determine whether the time interval of the distance detection relative to the current time reaches a preset interval, and if yes, notify the relative distance detecting module 630.

As shown in FIG. 8, in another embodiment, the audio output control module 650 includes a call determination unit 651 and a control execution unit 653;

The call determining unit 651 is configured to determine whether the detected relative distance is smaller than the first distance threshold, and if yes, determine that the call is a close distance call;

The control execution unit 653 is configured to reduce or turn off the output audio volume when the call is a close call.

In another embodiment, the control execution unit 653 is further configured to determine whether the detected relative distance is less than a second distance threshold, the second distance threshold is less than the first distance threshold, and if yes, turn off the output audio volume; , to reduce the audio volume of the output.

In one embodiment, the audio output control module 650 is further configured to obtain a volume decrease value according to a negative correlation between the detected distance and the volume decrease value, and reduce the audio volume output during the call according to the volume decrease value.

FIG. 9 is a schematic structural diagram of a walkie-talkie terminal according to an embodiment of the present invention. The walkie-talkie terminal 900 may include: at least one processor 901, such as a CPU, a baseband controller, etc., at least one mobile communication radio frequency component 903, and a memory 904, at least one Communication bus 902. Among them, the communication bus 902 is used to implement connection communication between these components. The memory 904 may be a high speed RAM memory or a non-volatile memory such as at least one disk memory. The memory 904 can also optionally be at least one storage device located remotely from the aforementioned processor 901. A set of program codes is stored in the memory 904, and the processor 901 is configured to call program code stored in the memory for performing the following operations:

Obtaining a terminal identifier of the sending terminal;

Detecting the relative distance from the transmitting terminal during the call;

Optionally, the processor 901 further performs the following operations:

Determining whether the time interval of the relative distance detection relative to the current time reaches a preset interval, and if yes,

Optionally, the processor 901 performs the step of determining, according to the detected relative distance, that the call is a close-range call, and suppressing the output audio, including:

Optionally, the processor 901 performs the operation of suppressing the outputted audio, and further includes:

Decreasing the audio volume of the output;

The second distance threshold is smaller than the first distance threshold.

Optionally, the processor 901 performs, according to the detected relative distance, the operation of suppressing the outputted audio when the call is a close-range call, and further includes:

While the invention has been described with respect to the preferred embodiments the embodiments The present invention may be embodied in a variety of forms without departing from the spirit or scope of the invention. It is to be understood that the invention is not limited to the details of the invention. All changes and modifications that come within the scope of the claims or the equivalents thereof are intended to be covered by the appended claims.

Claims

A method of controlling an audio output, the method being performed by a receiving terminal, the method comprising:

Obtaining a terminal identifier of the sending terminal; detecting a relative distance from the sending terminal during the call;

The outputted audio is suppressed when the call is determined to be a close call according to the detected relative distance.
The method of controlling an audio output according to claim 1, wherein the method further comprises:

Determining whether the time interval of the distance detection relative to the current time reaches a preset interval, and if yes,

The step of detecting the relative distance from the transmitting terminal during the call is performed again.
The method of controlling audio output according to claim 1, wherein the step of suppressing the outputted audio when the call is a close-range call according to the detected relative distance comprises:

Determining whether the detected relative distance is less than a first distance threshold, and if yes, determining that the call is a close distance call;

When it is determined that the call is a close call, the output audio volume is reduced or turned off.
A method of controlling an audio output according to claim 3, wherein said compacting output audio comprises:

Determining whether the detected relative distance is less than a second distance threshold, and if so, turning off the output audio volume; if not, then

Decreasing the audio volume of the output;

The second distance threshold is smaller than the first distance threshold.
The method of controlling audio output according to claim 1, wherein the step of suppressing the outputted audio when the call is a close-range call according to the detected relative distance comprises:

The volume decrease value is obtained according to a negative correlation between the detected relative distance and the volume decrease value, and the audio volume is decreased according to the volume decrease value.
A user terminal, comprising:

a terminal identifier obtaining module, configured to acquire a terminal identifier of the sending terminal;

a relative distance detecting module, configured to detect a relative distance from the transmitting terminal during a call;

The audio output control module is configured to suppress the output audio when the call is a close call according to the detected relative distance.
The user terminal of claim 6, wherein the user terminal further comprises:

a period detecting module, configured to determine whether the time interval of the distance detection relative to the current time reaches a preset interval, and if yes,

The relative distance detecting module is notified.
The user terminal according to claim 6, wherein the audio output control module comprises:

a call determining unit, configured to determine whether the detected relative distance is smaller than a first distance threshold, and if yes, determine that the call is a close-range call;

The control execution unit is configured to reduce or turn off the output audio volume when the call is a close call.
The user terminal according to claim 8, wherein the control execution unit is further configured to determine whether the detected relative distance is smaller than a second distance threshold.

If yes, the audio volume of the output is turned off; if not, then

Decreasing the audio volume of the output;

The second distance threshold is smaller than the first distance threshold.
The user terminal according to claim 6, wherein the audio output control module is further configured to obtain the volume decrease value according to a negative correlation between the detected relative distance and a volume decrease value, according to The volume reduction value reduces the audio volume.
A walkie-talkie terminal, comprising: at least one processor, at least one mobile communication radio frequency component, a memory and at least one communication bus, wherein the memory stores program code, and the processor is configured to call the program code stored in the memory Used to do the following:

Obtaining a terminal identifier of the sending terminal;

Detecting the relative distance from the transmitting terminal during the call;

The outputted audio is suppressed when the call is determined to be a close call according to the detected relative distance.
The walkie-talkie terminal according to claim 11, wherein the processor further performs the following operations:

Determining whether the time interval of the distance detection relative to the current time reaches a preset interval, and if yes,

The operation of detecting the relative distance from the transmitting terminal during the call is performed again.
The intercom terminal according to claim 11, wherein the processor performs the operation of suppressing the outputted audio when the call is a close-range call according to the detected relative distance, and includes:

Determining whether the detected relative distance is less than a first distance threshold, and if yes, determining that the call is a close distance call;

When it is determined that the call is a close call, the output audio volume is reduced or turned off.
The intercom terminal according to claim 13, wherein the operation performed by the processor to suppress the outputted audio comprises:

Determining whether the detected relative distance is less than a second distance threshold, and if so, turning off the output audio volume; if not, then

Decreasing the audio volume of the output;

The second distance threshold is smaller than the first distance threshold.
The intercom terminal according to claim 11, wherein the processor performs the operation of suppressing the outputted audio when the call is a close-range call according to the detected relative distance, and includes:

The volume decrease value is obtained according to a negative correlation between the detected relative distance and the volume decrease value, and the audio volume is decreased according to the volume decrease value.