KR20160012444A - System and method for measuring quality of voice communication of smartphone - Google Patents

Abstract

The present invention relates to a system for measuring quality of voice communications of a smartphone, which comprises: an audio device combined with a smartphone to reproduce a reference signal for measuring quality of voice communications, and recording a reception attenuation sound received from a counterpart terminal to transmit the same to the smartphone; and a smartphone having a quality measurement means of voice communications, which measures the quality of the voice communications based on the reception attenuation sound and the reference signal transmitted from the audio device.

Description

TECHNICAL FIELD [0001] The present invention relates to a system and a method for measuring voice call quality of a smart phone,

The present invention relates to a system and a method for measuring voice call quality of a smartphone, and more particularly, to a system and method for measuring a voice call quality of a smartphone using a compact audio device and an application program installed on the smartphone, System and method.

Mean Opinion Score (MOS) is a method of evaluating the quality of speech by scoring the average opinion of the subjects. This method uses subjective test methods such as interactive opinion test, listening opinion test, interview and survey test . Table 1 below shows the satisfaction of the user according to the MOS value.

MOS value Quality grade 5 Excellent 4 Good 3 Fair 2 Poor One Bad

MOS can express subjective satisfaction by simply expressing the satisfaction of the voice quality of the subjects by the average value. In addition, since the same subjects do not guarantee that the same results will be obtained even if they are performed in the same environment, and the opinions of many subjects are required to represent the average opinions, an objective method is recently preferred due to high measurement cost.

As an objective MOS measurement algorithm, PESQ (Perceptual Evaluation of Speech Quality) is standardized for 16 Kbps narrow band speech and Perceptual Objective Listening Quality Assessment (POLQA) for 48 Kbps wide band speech.

1 and 2 are diagrams for explaining a conventional apparatus for measuring call quality using a PESQ or POLQA algorithm and a method thereof.

1, the communication quality measuring apparatus 3 using the PESQ and POLQA algorithms is a communication quality measuring apparatus using a PESQ or a POLQA algorithm in which a reference signal and an original signal are transmitted through a communication system 2, ). When the smartphone caller inputs the original voice and the attenuated voice, the voice quality is measured based on the difference of the signal characteristics of both sides.

In order to measure the voice communication quality of the smartphone, as shown in FIG. 2, the transmitting side equipment 5 reproduces a reference signal and sets it as a microphone (call) input of the transmitting side smartphone 4 (Sound attenuation) that has passed through the network (communication network) is recorded as a call output of the reception-side smartphone 6 by the reception-side equipment 7, and then the PESQ Or the POLQA algorithm is executed to measure the MOS value.

However, such a conventional smartphone voice call quality measuring system is a system for playing back original sound, recording of an attenuation sound, and performing MOS calculation, as a personal computer (PC) or dedicated hardware (H / W) Is used as a measuring device. Such conventional equipment is bulky and heavy, which is unsuitable for measuring the voice call quality of a mobile terminal in a space where a vehicle is difficult to approach, such as in a building, a subway, a mountain trail, and the like.

Korean Patent No. 10-1335859 (November 31, 2013)

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above problems, and it is an object of the present invention to provide a system capable of easily and efficiently measuring the voice call quality of a smartphone using a small audio apparatus and an application program installed in the smart phone And a method thereof.

According to an aspect of the present invention, there is provided a system for measuring a voice call quality of a smartphone, the system including a smart phone for reproducing a reference signal for measuring voice call quality, An audio device for recording a sound and transmitting it to a smartphone; And a voice communication quality measuring means for measuring a voice communication quality based on a reception attenuation sound and an original sound transmitted from the audio device.

Here, the audio device may include: a main control unit operatively associated with a smartphone and controlling overall functions of the audio device; A Bluetooth interlocking part for transmitting / receiving a control signal to / from the smartphone; An audio reproduction recording unit for reproducing the original sound under the control of the main control unit and recording a reception attenuation sound transmitted from the other party terminal connected to the telephone; And a memory unit storing the original sound and storing the recorded reception attenuation sound transmitted from the other party's terminal.

In addition, the portable terminal may further include a connector coupled to an audio input terminal of the smartphone, and the original sound and the reception attenuation sound may be transmitted and received through the connector.

According to another aspect of the present invention, there is provided a method for measuring voice call quality in a voice call quality measuring system of a smartphone, wherein the calling smart phone transmits a call connection request signal to an audio device, A first step of connecting a voice call with a receiving smart phone according to a connection request; A second step of the originating smartphone transmitting an original sound reproducing request signal to the audio device; A third step of the audio device transmitting the original sound through the voice call call to the receiving smartphone through the calling smartphone according to the original sound reproducing request signal; A third step of transmitting a reception attenuating sound recording request signal to a receiving attenuating sound transmitted from a receiving smart phone to an audio device of a calling smart phone; A fourth step of the audio device recording the reception attenuation sound and transmitting the reception attenuation sound to the calling side smartphone when the recording is completed; And a fifth step of the originating smartphone calculating a voice communication quality based on the reception attenuation sound and the original sound.

According to another aspect of the present invention, there is provided a method of measuring voice call quality in a voice call quality measuring system of a smartphone as described above, wherein the receiving smart phone receives a voice call connection request signal, A first step of connecting a calling smart phone with a voice call; A second step of transmitting a reception attenuating sound recording request signal for a reception attenuating sound transmitted from the calling side smartphone to the audio device by the receiving side smartphone; A third step of the audio device recording the reception attenuation sound and transmitting the reception attenuation sound to the reception side smartphone when the recording is completed; A fourth step of the receiving smartphone calculating a voice communication quality based on the reception attenuation sound and the original sound; A fifth step of the receiving-side smartphone transmitting an original sound reproducing request signal to the audio device; And a sixth step of the audio device transmitting the original sound through the voice call call to the calling smartphone through the receiving smartphone in accordance with the original sound reproducing request signal.

Here, the step of calculating the voice call quality is preferably performed by a Perceptual Evaluation of Speech Quality (PESQ) or a Perceptual Objective Listening Quality Assessment (POLQA) algorithm.

Further, it is preferable that the above steps are repeated a plurality of times.

According to the present invention, it is possible to provide a system and method for easily and efficiently measuring voice call quality of a smartphone using a small audio apparatus and an application installed in the smart phone.

In addition, according to the present invention, it is possible to provide a voice call quality measurement system and method having a high level of precision using only a smart phone and a small audio device instead of a device composed of expensive large-scale hardware.

In addition, according to the present invention, not only a voice call quality measuring function but also a mobile communication radio quality measuring function and a data throughput quality measuring function are integrated on a smart phone, All measurement and test functions can be implemented through audio devices and applications.

In addition, according to the present invention, a voice communication quality MOS value collected from a smartphone is combined with mobile communication quality information collected from a smartphone and transmitted to a central center server. In a central server, Information can be used to manage the overall communication quality of the wireless communication network, thereby contributing to improvement in voice communication quality.

1 and 2 are diagrams for explaining a conventional apparatus for measuring call quality using a PESQ or POLQA algorithm and a method thereof.
3 is a diagram illustrating the overall configuration and connection relationship of a voice call quality measuring system of a smartphone according to an embodiment of the present invention.
4 is a diagram showing an internal configuration of an audio apparatus used in the present invention.
FIG. 5 and FIG. 6 are flowcharts illustrating a method of measuring voice call quality of a smartphone in the voice call quality measuring system of the smartphone described in FIGS. 3 and 4. FIG.
FIG. 7 and FIG. 8 are flowcharts illustrating another embodiment of a method for measuring voice call quality of a smartphone in the voice call quality measuring system of the smartphone illustrated in FIGS. 3 and 4. FIG.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

3 is a diagram illustrating the overall configuration and connection relationship of a voice call quality measuring system of a smartphone according to an embodiment of the present invention.

Referring to FIG. 3, the system for measuring voice call quality of a smartphone according to the present embodiment includes audio devices 13a and 13b and smartphones 11 and 12.

The audio devices 13a and 13b are combined with the smartphones 11 and 12 to reproduce a reference signal for measuring a voice call quality and record a reception attenuation sound received from the other terminal, As shown in FIG.

The smart phones 11 and 12 are characterized by comprising voice communication quality measuring means for measuring voice communication quality based on the reception attenuation and original sound transmitted from the audio devices 13a and 13b.

Such a system can perform call setup control, reference signal reproduction, and attenuating sound recording function through a communication network, which are performed in a conventional personal computer (PC) or a dedicated voice call quality measurement hardware (H / W) (Perceptual Evaluation of Speech Quality) or POLQA (Perceptual Objective Listening Quality Assessment) algorithm having a large amount of calculation is carried out by means of voice call quality measurement means installed in the smartphone .

Here, it is preferable that the voice call quality measuring means is provided in a smart phone in the form of an application program.

In the present embodiment, the calling smartphone 11 refers to a smart phone that transmits a call connection request signal in a mobile communication call connection to a communication system (base station or the like) on the network, and the receiving smart phone 12 refers to a calling side Refers to a smartphone that receives a request for receiving an incoming call from the communication system in response to a call connection request of the smartphone 11. The originating smartphone 11 and the receiving smartphone 12 are, There are differences in the procedure for measuring voice call quality, but the structure may be substantially the same.

Similarly, the audio device is also an audio device connected to the calling side smartphone 11, the receiving side audio device 13b is an audio device connected to the receiving side smartphone 12, Each of which differs in the procedure for measuring voice call quality according to the calling party or the receiving party, but the structure may be substantially the same.

In the present embodiment, it is preferable that the audio apparatus is configured to be very small as shown in Fig.

According to the present embodiment, in implementing the voice call quality measuring system, a reference signal is reproduced during a voice call, a reception attenuation sound received from the counterpart terminal is recorded in an audio device, To the smartphone, the voice call quality MOS value of the smartphone can be calculated by performing the PESQ or POLQA algorithm in the voice call quality measuring means of the smartphone.

As described above, in the present embodiment, by using the audio devices 13a and 13b connected to the smartphones 11 and 12 in the call using the smart phones 11 and 12, The main technical feature is that the voice call quality is measured with the same precision as the voice call quality measurement accuracy.

4 is a diagram showing an internal configuration of an audio apparatus used in the present invention.

4, the audio apparatus 13 according to the present embodiment includes a housing 130, a main control unit 131, an audio reproduction recording unit 132, a memory unit 133, a Bluetooth interlocking unit 134, A status display unit 135 and a connector 136. [

The housing 130 houses a main control unit 131, an audio reproduction recording unit 132, a memory unit 133, a Bluetooth interlocking unit 134 and a status display unit 135, (E.g., an earphone jack, a microphone input jack).

The connector 136 is inserted into the audio input terminal of the smartphone as a means for connecting the audio device 13 to the smartphone, so that it can transmit and receive the original sound or the attenuation sound.

The main control unit 131 is a means for controlling the overall function of the audio device in cooperation with the smartphone. The main control unit 131 receives a call connection request signal and a call connection release request signal from the smart phone through the Bluetooth interlock unit 134, And performs control to connect or release the call connection through the communication unit 134. The function of controlling the audio reproduction recording unit 132 to receive the original sound reproduction request signal and the reception attenuation sound recording request signal from the smartphone through the Bluetooth interlock unit 134 and to reproduce the original sound or to record the reception attenuation sound . In addition, the control unit 140 controls to transmit the recorded reception attenuation sound to the smartphone through the Bluetooth interlock unit 134 after the reception of the reception attenuation sound is completed.

The audio reproduction recording unit 132 reproduces the original sound under the control of the main control unit and records a reception attenuation sound transmitted from the other party terminal connected to the telephone. The reproduced original sound is transmitted to the receiving smartphone through the calling smartphone and the communication network, which acts as a receiving attenuating sound in the receiving smartphone.

In addition, the audio reproduction recording unit 132 records a received degraded signal coming from the receiving smartphone to the calling smartphone according to the receiving attenuating sound recording request signal of the main control unit 131, And transmits a completion signal to the main control unit 131. [

The Bluetooth interlocking unit 134 transmits and receives various control signals through the Bluetooth and the smartphone. The Bluetooth interworking unit 134 includes an SPP (Serial Port Profile) function unit and an HFP (Hands-Free Profile) function unit. The SPP function unit is connected to the serial communication and is responsible for transmitting and receiving the control signal through the serial communication with the main control unit 131 and the smartphone. The HFP function unit transmits a signal related to a call connection and a call connection release between the communication function of the smart phone and the main control unit 131 as means for performing a call function by handsfree. All of which are known from the prior art, and these are not directly related to the present invention, and detailed description thereof will be omitted.

The memory unit 133 stores the original sound and the attenuated sound to be recorded.

The status display unit 135 is, for example, one or more LED lamps for indicating the status of the audio apparatus, and displays the power status or operating status of the audio apparatus through on-off status or color of the lamp. In addition, the status display unit 135 may be implemented as a small display device.

According to the present embodiment, a call connection and a call connection related signal are transmitted and received in cooperation with a smart phone through a small audio device, a communication is made with a smart phone through a Bluetooth interlocking part, and, under the control of the main control part, A sound attenuation sound from the other party's terminal (reception side smartphone) is recorded, a recorded reception attenuation sound is transmitted to the smartphone, and the voice quality measurement means implemented in the form of an application program of the smartphone The quality MOS value can be calculated.

FIG. 5 and FIG. 6 are flowcharts illustrating a method of measuring voice call quality of a smartphone in the voice call quality measuring system of the smartphone described in FIGS. 3 and 4. FIG.

5, a voice call quality measurement means (quality measurement application 111) installed in the form of an application program on the calling side smartphone 11 transmits a call connection request signal to a serial port profile (SPP) To the main control unit 131 of the source audio apparatus 13a via the first function unit 134a of the Bluetooth interworking unit that supports the source audio apparatus 13a (S51). Here, the call connection request signal includes the telephone number of the receiving smart phone which is the other party of the call connection.

The call connection request signal is transmitted to the second function unit 134b of the Bluetooth interworking unit supporting the hands-free profile in the audio device in the main control unit 131 (S52). The second function unit 134b transmits a call connection request signal to the phone call function unit 112 performing the phone call function of the calling smart phone 11 according to, for example, the Bluetooth HFP 4.2 standard (S53).

The source smartphone 11 forms a voice call with the destination terminal (the receiving smartphone) 12 according to a general communication call connection procedure through the communication network in response to the call connection request signal of the source audio apparatus 13a (S54).

When the voice call is connected, the calling smartphone 11 transmits a call connection completion signal to the second function unit 134b according to the Bluetooth HFP 4.2 standard (S55). When the call connection completion signal is received, the second function unit 134b transmits a call connection completion signal to the main control unit 131 (S56). The main control unit 131 transmits the call connection completion signal to the main control unit 131 through the first function unit 134a And transmits a call connection completion signal to the application 111 (S57).

When the call connection completion signal is received, the quality measurement app 111 transmits an original sound reproduction request signal to the main control unit 131 through the first function unit 134a (S58). When the original sound reproducing request signal is received, the main control unit 131 transfers the original sound reproducing request signal to the audio reproduction recording unit 132 in the source audio apparatus 13a (S59).

The audio reproduction recording unit 132 reproduces the original sound stored in the memory unit according to the original sound reproduction request signal and reproduces the original sound through the phone call function unit 112 of the smart phone, To the receiving smart phone (S60).

When the reproduction of the original sound is completed, the audio reproduction recording unit 132 transmits an original sound reproduction completion signal to the main control unit 131 (S61). The main control unit 131 transmits an original sound reproduction completion signal to the quality measurement app 111 through the first function unit 134a (S62).

When the original sound reproduction completion signal is received, the quality measurement app 111 transmits a recording request signal for reception attenuation sound from the counterpart terminal (receiving smartphone) 12 to the main controller 131 (S63).

The main control unit 131 transmits a reception attenuation sound recording request signal to the audio reproduction recording unit 132 in step S64 and the audio reproduction recording unit 132 transmits the reception attenuation sound recording request signal to the telephone call function unit 112 to record the received attenuation sound received through the voice call from the receiving smartphone 12 (S65).

6, when the recording of the reception attenuation sound is completed, the audio reproduction recording unit 132 transmits the reception attenuation sound recording completion signal to the main control unit 131 (S66). The main control unit 131 transmits a reception attenuation sound recording completion signal to the quality measurement app 111 through the first function unit 134a (S67). Then, the main control unit 131 transmits the recorded attenuation sound file to the quality measurement app 111 according to the reception attenuation sound recording completion signal (S68).

When the reception attenuating sound file is received, the quality measuring app 111 calculates a MOS (Mean Opinion Score) value through a voice call quality measurement algorithm implemented on the hardware of the calling smartphone 11 (S69). Steps S58 to S69 in the above procedure may be repeated a plurality of times (n times).

As described above, the MOS is a method for subjectively evaluating the call quality by attempting to make a direct call by an evaluation unit composed of a large number of people, and can calculate the quality grade according to the MOS value as shown in Table 1 above.

As described above, the algorithm for objectively measuring the MOS uses a Perceptual Evaluation of Speech Quality (PESQ) measurement algorithm according to the standardization (refer to ITU-T Rec. P.862) standard for the 16 kbps narrow band voice And a Perceptual Objective Listening Quality Assessment (POLQA) measurement algorithm according to the standardization (refer to ITU-T Rec. P.863) standard can be used for a 48 kbps wide band voice.

When the calculation of the MOS value is completed through this process, the quality measurement app 111 transmits a call connection release request signal to the main control unit 131 through the first function unit 134a (S70). The main control unit 131 transmits a call connection release request signal to the second function unit 134b (S71).

When the call connection release request signal is input, the second function unit 134b transmits a call connection release request signal to the telephone call function unit 112 according to the Bluetooth HFP 4.2 standard (S72). The phone call function unit 112 cancels the voice call according to a conventionally known call connection release procedure (S73). Then, the call connection completion signal is transmitted to the second function unit 134b (S74).

When the call connection release completion signal is received, the second function unit 134b transmits a call connection release completion signal to the main control unit 131 (S75). The main control unit 131 transmits a call connection release completion signal to the quality measurement app 111 (S76).

According to the present embodiment, a call connection request signal is transmitted to an audio device, a voice call is connected to a counterpart terminal according to a call connection request of the audio device, a original sound reproduction request signal is transmitted to the audio device, And transmits a reception attenuating sound recording request signal from the other terminal to the audio device, receives the reception attenuating sound recording file from the audio device, and calculates a difference between the reception attenuation sound recording file and the original sound through a voice call quality measuring algorithm The method comprising the steps of: (a)

On the other hand, the steps (S51) to (S76) may be repeated m times.

FIG. 7 and FIG. 8 are flowcharts illustrating a method of measuring voice call quality of a smartphone in the voice call quality measuring system of the smartphone described in FIGS. 3 and 4, to be.

7, when a voice call incoming call request event is generated according to a general mobile communication call connection procedure from the calling terminal 11 in the receiving smart phone 12 through the communication network (S81), the receiving smart The phone call function unit 122 of the phone 12 transmits an incoming call reception event to the second function unit 134b in the receiver side audio apparatus 13b in accordance with the Bluetooth HFP 4.2 standard (S82).

When an incoming call reception event is received, the second function unit 134b transmits an incoming call reception notification to the main control unit 131 (S83). The main control unit 131 transmits an incoming call reception notification to the quality measurement app 121 provided in the reception-side smartphone 12 through the first function unit 134a (S84).

When the incoming call reception notification is received, the quality measurement app 121 transmits an incoming call connection request signal to the main control unit 131 through the first function unit 134a (S85). The main control unit 131 transmits an incoming call connection request signal to the second function unit 134b (S86).

When the incoming call connection request signal is input, the second function unit 134b transmits an incoming call connection request signal to the telephone communication function unit 122 according to the Bluetooth HFP 4.2 standard (S87). In response to the incoming call connection request signal, the phone call function unit 122 connects the voice call with the calling smart phone 11 according to a known mobile communication call connection procedure (S88). When the voice call is connected, the phone call function unit 122 transmits an incoming call connection completion signal to the second function unit 134b according to the Bluetooth HFP 4.2 standard (S89).

The second function unit 134b transmits a call connection completion signal to the main control unit 131 (S90). The main control unit 131 transmits a call connection completion signal to the quality measurement app 121 through the first function unit 134a (S91).

When the call connection completion signal is received, the quality measurement app 121 transmits a reception attenuation sound recording request signal to the main control unit 131 through the first function unit 134a (S92). The main control unit 131 transmits a reception attenuation sound recording request signal to the audio reproduction recording unit 132 (S93).

The audio reproduction recording unit 132 records the reception attenuation sound from the calling terminal 11 transmitted through the telephone call function unit 122 and the pre-established voice call through the communication network in response to the reception attenuation sound recording request signal (S94).

Next, as shown in FIG. 8, when the reception attenuation sound recording is completed, the audio reproduction recording unit 132 transmits a reception attenuation sound recording completion signal to the main control unit 131 (S95). The main control unit 131 transmits the reception attenuation sound recording completion signal to the quality measurement app 121 through the first function unit 134a (S96). The main control unit 131 transmits the recorded attenuation sound file to the quality measurement app 121 in response to the reception attenuation sound recording completion signal (S97).

Next, the quality measurement app 121 calculates the voice call quality MOS value as described above based on the original sound and the reception attenuation sound (S98).

Next, the quality measurement app 121 transmits an original sound reproduction request signal to the main control unit 131 through the first function unit 134a (S99). When the original sound reproducing request signal is received, the main control unit 131 transmits the original sound reproducing request signal to the audio reproduction recording unit 132 in the receiving audio apparatus 13b (S100).

In response to the original sound reproduction request signal, the audio reproduction recording unit 132 reproduces a stored reference signal through a voice communication call formed through the telephone communication function unit 122 and the communication network, Side smartphone 11, as shown in FIG. When the original sound reproduction is completed, the audio reproduction recording unit 132 transmits a sound reproduction completion signal to the main control unit 131 (S102).

The main control unit 131 transmits the original sound reproduction completion signal to the quality measurement app 121 through the first function unit 134a (S103).

After repeating the above steps (S92 to S103) a plurality of times (m times), when it is desired to cancel the voice call, the quality measurement app 121 transmits a call connection release request signal to the main controller (Step S104). The main control unit 131 transmits a call connection release request signal to the second function unit 134b (S105).

When the call connection release request signal is received, the second function unit 134b transmits a call connection release request signal to the telephone call function unit 122 according to the Bluetooth HFP 4.2 standard (S106). The telephone call function unit 122 cancels the voice call according to a conventional mobile communication call connection release procedure (S107).

Then, in accordance with the Bluetooth HFP 4.2 standard, the call disconnection completion signal is transmitted to the second function unit 134b (S108). When the call connection release completion signal is received, the second function unit 134b transmits a call connection release completion signal to the main control unit 131 (S109). The main control unit 131 transmits a call connection release completion signal to the quality measurement app 121 through the first function unit 134a (S76).

This process, that is, steps S81 to S111 is repeated n times.

According to the present exemplary embodiment, an incoming call reception request event is transmitted to an audio device, a voice call incoming call request event is transmitted from an originating smartphone, an incoming call reception notification is received from an audio device, and an incoming call connection request signal Transmits a voice call signal to a calling side smart phone according to a call connection request of the audio device, transmits a voice request signal for a receiving attenuation sound transmitted from the calling side terminal to the audio device, And a difference between the received attenuation sound recording file and the pre-stored original sound is calculated through a voice communication quality measurement algorithm.

Meanwhile, in the above embodiment, the voice call quality MOS value measured by the quality measurement app of the smartphone is combined with the mobile communication quality information collected from the smartphone, and the combined result is transmitted to the central server. It is possible to contribute to the improvement of the voice communication quality by managing the overall communication quality of the wireless communication network by using the voice communication quality information.

It will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the following claims . It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive.

11: Outbound Smartphone
12: Receiver Smartphone
13, 13a, 13b: audio device
130: housing
131:
132: Audio playback recording section
133:
134, 134a, 134b:
135: Status indicator
136: Connector

Claims (7)

A system for measuring voice call quality of a smartphone,
An audio device for reproducing a reference signal for measuring a voice communication quality in combination with a smartphone and recording a reception attenuation sound received from the other party's terminal and transmitting the same to a smartphone; And
And a voice communication quality measuring means for measuring a voice communication quality based on a reception attenuation sound and an original sound transmitted from the audio device,
And a voice communication quality measuring system of the smart phone.
The method according to claim 1,
The audio apparatus includes:
A main control unit interlocked with the smartphone and controlling overall functions of the audio device;
A Bluetooth interlocking part for transmitting / receiving a control signal to / from the smartphone;
An audio reproduction recording unit for reproducing the original sound under the control of the main control unit and recording a reception attenuation sound transmitted from the other party terminal connected to the telephone; And
A memory unit for storing the original sound and storing the recorded reception attenuation sound transmitted from the other party's terminal
Wherein the voice call quality measuring system of the smart phone comprises:
3. The method of claim 2,
Further comprising a connector coupled to an audio input terminal of the smartphone,
Wherein the original sound and the reception attenuation sound are transmitted and received through the connector.
A method for measuring voice call quality in a voice communication quality measuring system of a smartphone according to any one of claims 1 to 3,
A first step of the originating smartphone transmitting a call connection request signal to an audio device and connecting a voice call with a receiving smart phone in response to a call connection request of the audio device;
A second step of the originating smartphone transmitting an original sound reproducing request signal to the audio device;
A third step of the audio device transmitting the original sound through the voice call call to the receiving smartphone through the calling smartphone according to the original sound reproducing request signal;
A fourth step of transmitting a reception attenuating sound recording request signal for a reception attenuation sound transmitted from the reception side smartphone to the audio device of the calling side smartphone;
A fifth step of the audio device recording the reception attenuation sound and transmitting the reception attenuation sound to the calling side smartphone when the recording is completed; And
The sixth step of the originating smartphone calculating the voice communication quality based on the reception attenuation and the original sound
The method comprising the steps of:
A method for measuring voice call quality in a voice communication quality measuring system of a smartphone according to any one of claims 1 to 3,
A first step of a receiving smartphone receiving a voice call connection request signal and connecting a voice call with a calling smart phone in conjunction with an audio device;
A second step of transmitting a reception attenuating sound recording request signal for a reception attenuating sound transmitted from the calling side smartphone to the audio device by the receiving side smartphone;
A third step of the audio device recording the reception attenuation sound and transmitting the reception attenuation sound to the reception side smartphone when the recording is completed;
A fourth step of the receiving smartphone calculating a voice communication quality based on the reception attenuation sound and the original sound;
A fifth step of the receiving-side smartphone transmitting an original sound reproducing request signal to the audio device; And
The audio device transmits the original sound through the voice call to the calling smartphone via the receiving smartphone in accordance with the original sound reproducing request signal
The method comprising the steps of:
The method according to claim 4 or 5,
Wherein the step of calculating the voice call quality is performed by a Perceptual Evaluation of Speech Quality (PESQ) or a Perceptual Objective Listening Quality Assessment (POLQA) algorithm.
The method according to claim 4 or 5,
Wherein the steps are repeated a plurality of times.

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