KR100968965B1 - Method and device for testing of video call quality - Google Patents

Abstract

A video call quality test method and apparatus are disclosed. According to an embodiment of the present invention, a method of testing a video call quality of a terminal by a measurement device connected to a terminal, the method comprising: controlling a video call with a counterpart terminal through the terminal; Capturing an image displayed in an output area of the terminal at predetermined time intervals, wherein the output area is an area in which an image corresponding to the counterpart terminal is output; And testing whether a video corresponding to the video call is received using the captured video and the set video. Accordingly, the video call quality of the terminal can be tested.

Test, video call, mobile communication

Description

Method and device for testing of video call quality}

The present invention relates to a video call quality test, and more particularly, to a method and apparatus for testing a video call quality of a terminal.

 In general, the International Mobile Telecommunications (IMT) -2000 system, which is applied as a third generation mobile communication system, is a mobile communication system making recommendations in the TG / 1 of the ITU-R. PSTN / ISDN / B according to the needs of mobile users A mobile communication system that allows a wireless link to access various communication services supported by a fixed communication network such as ISDN.

In the 3rd generation mobile communication system, the frequency bands used are 1,885 MHz to 2,025 MHz and 2,110 MHz to 2,200 MHz, which are determined by WARC-92, and not only provide existing communication services but also provide a higher level of service by improved technology. have.

In addition, third generation mobile communication systems such as IMT-2000 can interoperate with various systems, have high service compatibility by worldwide operations, and have the features of using small, lightweight terminals with high quality. .

Meanwhile, the third generation mobile communication system adopts a wideband CDMA (WCDMA) system as an asynchronous communication method. The WCDMA system has been developed based on a GSM communication network, and has a multi-band fading channel by widening a frequency bandwidth of 5 MHz per 1FA. Since it can be received and separated or synthesized into more multipath components, it is possible to expect an improvement in reception quality due to diversity of the rake time, so that it is suitable for high-speed data transmission.

In an asynchronous mobile communication system such as a WCDMA system, when a calling terminal makes a call to a called party, a called tone is generated at the called exchange to provide a tone signal indicating the progress of the call. It is designed to transmit a tone, which generates a tone signal from the destination exchange with the originating exchanger and the radio bearer set up during the incoming exchange period after the call setup for the call origination of the originating terminal. The tone is transmitted to the calling subscriber.

In such a WCDMA system, video communication for exchanging moving images between a calling terminal and a receiving terminal can be performed. Therefore, in order to achieve a smooth video call function, the quality of moving images exchanged with each other becomes important.

However, whether a video call between terminals is successful at present is determined based on a connection message of the terminals. For this reason, there is a problem that it is not possible to determine whether or not the video is normally transmitted and received corresponding to the video call between the terminals.

The present invention provides a video call quality test method and apparatus capable of testing video call quality of a terminal.

The present invention also relates to a video call quality test method and apparatus which can test whether a counterpart terminal receives a video while a video call is connected.

In addition, the present invention relates to a video call quality test method and apparatus that can ensure the quality of the terminal by testing the video call quality of the terminal and further improve the reliability.

According to an aspect of the present invention, a method for testing a video call quality of a terminal by a measurement device connected to the terminal is provided.

According to an embodiment of the present invention, a method of testing a video call quality of a terminal by a measurement device connected to a terminal, the method comprising: controlling a video call with a counterpart terminal through the terminal; Capturing an image displayed in an output area of the terminal at predetermined time intervals, wherein the output area is an area in which an image corresponding to the counterpart terminal is output; And testing whether a video corresponding to the video call is received using the captured video and the set video.

According to another aspect of the invention, there is provided a measuring device connected to the terminal for testing the video call quality of the terminal.

According to an embodiment of the present invention, a measuring device connected to a terminal for testing the video call quality of the terminal, the control unit for controlling the video call with the other terminal via the terminal; A capture unit which captures an image displayed on an output area of the terminal at predetermined time intervals; And a test unit configured to test whether the image corresponding to the video call is received using the captured image and the set image, wherein the output area is an area where an image corresponding to the counterpart terminal is output. An apparatus may be provided.

By providing a video call quality test method and apparatus according to the present invention, there is an effect that can test the video call quality of the terminal.

In addition, the present invention has the effect that it is possible to test whether the other terminal receives the video while the video call is connected.

In addition, the present invention can ensure the quality of the terminal by testing the video call quality of the terminal and further has the effect of improving the reliability.

As the invention allows for various changes and numerous embodiments, particular embodiments will be illustrated in the drawings and described in detail in the written description. However, this is not intended to limit the present invention to specific embodiments, it should be understood to include all transformations, equivalents, and substitutes included in the spirit and scope of the present invention. In the following description of the present invention, if it is determined that the detailed description of the related known technology may obscure the gist of the present invention, the detailed description thereof will be omitted.

The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another.

The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting of the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this application, the terms "comprise" or "have" are intended to indicate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, and one or more other features. It is to be understood that the present invention does not exclude the possibility of the presence or the addition of numbers, steps, operations, components, components, or a combination thereof.

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

1 is a diagram schematically illustrating a configuration of a mobile communication system for a video call.

Referring to FIG. 1, a mobile communication system for a video call includes a calling terminal 110, an exchange 120, a home location register 130, and a called terminal 140.

The calling terminal 110 and the called terminal 140 according to an embodiment of the present invention are connected to the wireless Internet through a communication network (for example, WCDMA network) and multimedia services (for example, video, Internet TV, email service, etc.). ) Is a terminal that can be provided. For example, a terminal may be a conventional mobile phone, PDA, smart phone, MBS (Mobile Broadcast System) phone, and the like, as long as the terminal is capable of a video call.

The exchanger 120 provides an interworking function between a mobile communication network and a fixed network such as PSTN, ISDN, or an interworking function of the mobile communication network with a network of a third party such as PLMN, Internet, PSPDN, and the like in a W-CDMA network. Perform the switch function to control the signal. That is, the switch 120 is a switch that provides a terminal at a current location for a circuit switching (CS) service in a WCDMA network. Exchange 120 is used for circuit switching.

Hereinafter, for convenience of understanding and explanation, an exchange controlling a video signal for circuit switching of a calling terminal will be referred to as an originating exchange, and an exchange controlling a video signal of a called terminal will be described as a called side exchange. . In this specification, the source exchange and the destination exchange will be described separately, but it is obvious that the source exchange and the destination exchange may be the same exchange.

The home location register 130 refers to a mobile subscriber database having terminal information, subscription information, location information, authentication function, and the like of the mobile communication subscriber. Although the home location register 130 is shown in the singular in FIG. 1, it may be plural as necessary.

2 is a flowchart illustrating a call setup method for a video call.

In step 210, the calling terminal 110 transmits a call setup request message SETUP for a video call to the called terminal 140 through the communication network to the calling exchange 120.

In step 215, the originating exchange 120 performs a forward message for transmitting a number and other information necessary for call processing and routing using the route information of the called terminal 140 in response to the call establishment request message. (ISDN User Part Initial Address) is transmitted to the destination exchange 120.

Accordingly, in step 220, the called side exchange 120 sets up a paging and traffic channel for a video call through a call setup request message to the called terminal 140.

In steps 225 and 230, the called terminal 140 transmits an alerting message to the called exchange 120, indicating that all of the address information necessary for call establishment has been received, and a call response message indicating that the called terminal 140 has answered the call. Send (Connect).

In steps 235 and 240, the destination exchange 120 receives ISUP ACM (Address Complete), which indicates that it has received all the address information necessary for call setup, and ISUP ANM (Answer), which indicates that the called party has answered the call. Is transmitted to the calling exchange 120.

In steps 245 and 250, the source exchange 120 transmits an alerting message and a Connect message indicating a resource allocation and call response for establishing a voice call to the called terminal 140 to the calling terminal 110.

In step 255, the originating terminal 110 transmits a response message (connect ack) to the originating exchange 120 in response to the connect message.

Accordingly, a channel for video call between the calling terminal 110 and the called terminal 140 may be set. Since a method for setting a channel for a video call between the calling terminal 110 and the called terminal 140 is obvious to those skilled in the art, a detailed description thereof will be omitted.

3 is a block diagram illustrating an internal functional configuration of a measuring device according to an embodiment of the present invention. Hereinafter, it will be described on the assumption that the measurement device 300 is connected to the calling terminal 110 or the called terminal 140. Hereinafter, the calling terminal 110 or the called terminal 140 connected to the measuring device 300 will be described collectively as a terminal.

Referring to FIG. 3, the measuring device 300 includes a communication unit 310, a capture unit 315, a test unit 320, a display unit 325, an input unit 330, a storage unit 335, and a control unit 340. It is configured to include.

The communication unit 310 is connected to each terminal through a communication network and performs a function of transmitting and receiving various information.

For example, the communication unit 310 may transmit a control command (eg, an EIF command or a DM command) of the control unit 340 to the terminal. In addition, the communication unit 310 may receive the captured image from the terminal.

Here, the captured image of the terminal is an image captured by the image displayed on the output area of the terminal. Also, the output area is an area where an image corresponding to the counterpart terminal is displayed corresponding to the video call.

For example, when the video call is connected with the counterpart terminal, the terminal may display an image received from the counterpart terminal in the output area corresponding to the video call. If an image is not received from the counterpart terminal corresponding to the video call, the terminal may display the preset setting image in the output area. The set image may be any one of a still image and a moving image.

The capture unit 315 captures the image displayed in the output area of the terminal. That is, the capture unit 315 may capture an image corresponding to the counterpart terminal displayed in the output area of the terminal by using the EIF command and the DM command at predetermined time intervals.

The test unit 320 may check a connection state corresponding to the video call by using the image captured by the capture unit 315 and the setting image set for each terminal.

For example, the test unit 320 compares the captured image and the set image to check whether or not the predetermined threshold or more match. If more than the threshold value, the test unit 320 may determine that the video call is not received corresponding to the video call of the terminal. In addition, when the connection state is determined as the unreceived state, the test unit 320 may collect and store information about the terminal at the corresponding time.

However, if a result of comparing the captured image and the set image does not match the threshold value, the test unit 320 may determine that the video call is in a reception state corresponding to the video call of the terminal. In addition, the test unit 320 may store the captured image corresponding to the video call reception state.

In the present specification, a video call not received state is defined as a state in which a video is not received from a counterpart terminal corresponding to a video call. In addition, a video call reception state is defined as a state in which a video is normally received from a counterpart terminal corresponding to a video call.

For example, the test unit 320 may compare the captured image and the set image for each pixel to check whether they are identical. That is, when about 90% of each pixel matches, the test unit 320 may determine that the video call is not received according to the video call. On the other hand, if about 90% of each pixel is inconsistent, the test unit 320 may determine that the video call is in a reception state corresponding to the video call.

The display unit 325 displays data corresponding to a command input by the user through the input unit 330 under control of the controller 340, and data (for example, image information) received through the communication unit 310. do. For example, the display unit 325 may be a liquid crystal display (LCD).

The input unit 330 is a means for receiving various control commands for controlling the operation of the measuring apparatus 300 from the user. For example, the input unit 330 may be implemented as a plurality of key buttons (for example, numeric / character keys, * or # symbols, and one or more function keys (for example, a menu key, a call key, a confirmation key, etc.). It may be implemented in the form of a touch screen or the like.

The storage unit 335 stores an operation program of the measuring device 300, one or more images received through the communication unit 310, one or more preset images, and a video.

The controller 340 is a communication unit 310, the capture unit 315, the test unit 320, the display unit 325, the input unit 330, to check the connection state according to the video call according to an embodiment of the present invention, It performs a function of controlling the storage unit 335.

In addition, the controller 340 may control the connected terminal to receive or transmit a video call with the counterpart terminal by using a preset control command.

4 is a flowchart illustrating a method of testing a video call quality for a video call of a terminal by a measuring device according to an embodiment of the present invention. Each step described below is performed by each internal component of the measuring device, but will be collectively described as a measuring device for the convenience of understanding and explanation.

In operation 410, the measurement apparatus 300 controls the origination or incoming call so that the terminal connects the video call with the counterpart terminal by using one of the EIF command and the DM command.

For example, the measurement apparatus 300 may control the calling terminal 110 to transmit a video call to the called terminal 140 using any one of an EIF command and a DM command. Then, when a call signal is received by the called terminal 140 in correspondence with the video call, the measuring device 300 uses the EIF command or the DM command to determine whether the called terminal 140 corresponds to the call signal. Can control the incoming call.

In operation 415, when the terminal is connected to the counterpart terminal and the video call, the measurement apparatus 300 captures an image corresponding to the counterpart terminal displayed through the output area of the terminal at predetermined time intervals.

In operation 420, the measurement apparatus 300 tests a video call quality by using a preset image corresponding to the captured image and the terminal.

For example, the measuring apparatus 300 determines whether the set image is a moving image or a still image. If the set image is a still image, the measurement apparatus 300 compares the captured image with the set image in units of pixels to determine whether a difference between each pixel is greater than or equal to a threshold. If the difference between each pixel is greater than or equal to the threshold, the measurement device 300 may recognize that the image is normally received from the counterpart terminal in correspondence to the video call. However, if the difference between each pixel is less than the threshold value, the measurement device 300 may recognize that the image is not received from the counterpart terminal corresponding to the video call.

However, if the set image is a video, the measurement apparatus 300 may test the video call quality by comparing the captured image with one or more of each of the frames in the set image.

For another example, the measurement device 300 may test the video call quality by multiple comparison of each frame of one or more captured images captured for a predetermined time and a set image.

For example, if the captured image and each pixel of the set image match about 90% or more, the measurement apparatus 300 may recognize that the image is not received from the counterpart terminal corresponding to the video call.

FIG. 5 is a diagram for explaining a test of a video call quality of a terminal by a measuring device according to an exemplary embodiment of the present invention.

As illustrated in FIG. 5, the measuring device 300 is connected to the calling terminal 110 and the called terminal 140, respectively. For this reason, each measuring device 300 controls the calling terminal 110 and the called terminal 140 to transmit or receive video calls.

Hereinafter, for convenience of understanding and explanation, a measuring device connected to the calling terminal 110 will be referred to as a first measuring device, and a measuring device connected to the called terminal 140 will be referred to as a second measuring device 300.

The first measurement device 300 controls the video call to be transmitted by transmitting the incoming information to the calling terminal 110 using any one of the EIF command and the DM command. The originating terminal 110 transmits the outgoing signal to the communication network under the control of the first measurement device 300. Correspondingly, when an alerting signal is introduced to the called terminal 140 through the communication network, the second measuring device 300 receives the video call by the called terminal 140 using any one of an EIF command and a DM command. To control.

As described above, in order for the measuring device 300 to test the video call quality between the respective terminals, each measuring device 300 is connected to each terminal to perform an operation for communication call connection.

In the related art, the measurement apparatus 300 determines whether the video call is successful based on a connect message received through each terminal. As a result, there is a problem in that it is not possible to confirm whether the video of the counterpart terminal is normally displayed on each terminal.

Therefore, the measuring device 300 according to the embodiment of the present invention is an image corresponding to the counterpart terminal displayed through the output area of each terminal (that is, the image received from the counterpart terminal, the preset image set corresponding to the video call) By checking the video output using can determine the success of the video call.

That is, while the video call is connected between the calling terminal 110 and the called terminal 140 under the control of the first measuring device and the second measuring device, the first measuring device displays an image displayed on the output area of the calling terminal. Capture is performed using either the EIF command or the DM command. As described above, the output area may be an area in which an image received from the called terminal is output in correspondence with the video call. Of course, when the video corresponding to the video call is not received from the called terminal due to factors such as network traffic, the setting video set corresponding to the video call service may be output to the calling terminal through the output area. .

The first measurement device may capture an image displayed through the output area at predetermined time intervals (for example, 1 second, 3 seconds, etc.). The first measurement apparatus compares the captured image with the set image in units of pixels to determine whether the threshold is equal to or greater than a threshold. If the threshold value is equal to or greater than the threshold value, the first measurement apparatus may recognize that the image of the counterpart terminal is not normally received according to the video call. However, if the threshold value does not match, the first measurement apparatus may recognize that the image is normally received from the destination terminal corresponding to the video call.

Up to now, the focus on testing the connection state of the video call centering on the first measuring device has been described above, but the same applies to the second measuring device, and thus redundant description will be omitted.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined in the appended claims. It will be understood that the invention may be varied and varied without departing from the scope of the invention.

1 is a diagram schematically illustrating a configuration of a mobile communication system for a video call.

2 is a flowchart illustrating a call setup method for a video call.

3 is a block diagram illustrating an internal functional configuration of a measuring device according to an embodiment of the present invention.

4 is a flowchart illustrating a method of testing a video call quality for a video call of a terminal by a measuring device according to an embodiment of the present invention.

FIG. 5 is a diagram for explaining a test of a video call quality of a terminal by a measuring device according to an embodiment of the present invention; FIG.

<Description of the symbols for the main parts of the drawings>

310: communication unit

315: capture unit

320: test unit

325: display unit

330: input unit

335: storage unit

340: control unit

Claims (11)

In the measuring device connected to the terminal to test the video call quality of the terminal, Controlling a video call with a counterpart terminal through the terminal; Capturing an image displayed in an output area of the terminal at predetermined time intervals, wherein the output area is an area in which an image corresponding to the counterpart terminal is output; And And testing whether an image corresponding to the video call is received using the captured image and the set image. The image displayed in the output area is any one of an image received from the counterpart terminal corresponding to the video call and a setting image set in the terminal according to the video call. The set video is a video call quality test method, when the video is not received from the counterpart terminal corresponding to the video call, the terminal outputs the video corresponding to the counterpart terminal to the output area. According to claim 1, The controlling of the video call with the counterpart terminal via the terminal may include: And controlling an incoming or outgoing video call with the counterpart terminal through the terminal using any one of an EIF command and a DM command. delete According to claim 1, The set video is a video call quality test method, characterized in that any one of a video and a still image. According to claim 1, The step of testing whether the image corresponding to the video call is received using the captured image and the set configuration image, Recognizing that an image corresponding to the video call is received from the counterpart terminal if a difference between the captured image and the set image is greater than or equal to a threshold value; And And recognizing that the video corresponding to the video call is not received from the counterpart terminal if the difference between the captured video and the set area is less than a threshold. 6. The method of claim 5, The step of testing whether the image corresponding to the video call is received using the captured image and the set configuration image, Determining whether the set image is a video; And And if the set image is a video, comparing the captured image with at least one of the frames of the set image, and determining whether the difference is greater than or equal to a threshold value. In the measurement device connected to the terminal to test the video call quality of the terminal, A controller for controlling a video call with a counterpart terminal through the terminal; A capture unit which captures an image displayed on an output area of the terminal at predetermined time intervals; And And a test unit for testing whether the image corresponding to the video call is received by using the captured image and the set image. The output area is an area where an image corresponding to the counterpart terminal is output. The image displayed in the output area is any one of an image received from the counterpart terminal corresponding to the video call and a setting image set in the terminal according to the video call. And the set image is an image that the terminal outputs to the output area as an image corresponding to the counterpart terminal when the image is not received from the counterpart terminal corresponding to the video call. The method of claim 7, wherein And the control unit controls to receive or transmit a video call with the counterpart terminal through the terminal using any one of an EIF command and a DM command. delete The method of claim 7, wherein The test unit determines whether a difference between the captured image and the set image is greater than or equal to a threshold value, and if the threshold value is greater than or equal to a threshold value, recognizes that an image corresponding to the video call is received from the counterpart terminal. And when the difference between the captured image and the setting area is less than a threshold value, recognizes that the image corresponding to the video call is not received from the counterpart terminal. The method of claim 7, wherein The test unit, if the set image is a video, the measurement device, characterized in that for comparing the at least one of the frames of the set image and the captured image, and determines whether the difference is greater than the threshold value.

Images