KR100765817B1 - method for remotely controlling for MOS measuring appliance - Google Patents

Abstract

The present invention relates to a remote control method of a MOS measuring device for controlling a measurement scenario of a wired network measuring device in a wired / wireless communication sound quality measuring device using DTMF or a user-defined tone through a remote wired / wireless telephone. will be.

The MOS measuring device remote control method of the present invention includes at least two voice call channels, and in the MOS measuring device which performs various procedures related to MOS measurement between the other party's equipment through the voice call channel, One of the call channels is used as a remote control channel. (A) When there is a call reception from a remote wired or wireless telephone, a start tone signal is received to indicate the start of the MOS measurement scenario setting after opening the call path. Determining whether it is; (b) when the start tone signal is received in the step (a), determining whether an end tone signal for notifying the end of the MOS measurement scenario setting is received from the next received tone signal; and (c) the end tone. If a signal is received, the method further includes converting the received tone signal into corresponding control data and then storing the MOS measurement scenario before the end tone signal is received after blocking the communication path.

MOS, call, sound quality, measurement, control, equipment, DTMF, tone signal

Description

Method for remotely controlling for MOS measuring appliance

1 is a network configuration diagram of a system to which the MOS measuring equipment remote control method of the present invention is applied;

2 is a block diagram of a MOS measuring device to which the remote control method of the present invention is applied;

3 is a detailed functional block diagram of a general MOS measurement algorithm;

4 is a flowchart illustrating a method for remotely controlling a MOS measuring device according to an exemplary embodiment of the present invention;

5A to 5E are graphs showing frequencies for the DTMF (#), DTMF (*), DTMF (0), DTMF (1), and DTMF (9) key signals, respectively.

*** Explanation of symbols for the main parts of the drawing ***

100, 200, 300: MOS measuring equipment,

102, 202, 302: measuring phone jack,

104, 204, 304: control phone jack,

106, 206, 306: landline phone for measurement,

108, 208, 308: control corded telephone,

400: public telephone network, 410: mobile network,

110: CPU, 111: ring detection unit,

112: telephone loop monitoring control unit, 113: CID detection unit,

114: DTMF transmission / reception unit, 115: command / data storage unit,

116: scenario storage, 117: DTMF buffer,

118: control data buffer,

119: voice / text message storage unit,

120: MOS measurement algorithm, 121: level adjustment section,

121a: reference speech signal level adjusting unit,

121b: call speech level control unit,

122, 123: input filter unit, 124: time synchronizer,

125, 126: audible converter, 127: distortion calculator,

128: distortion section check unit, 129: sound quality calculation unit

The present invention relates to a remote control method for MOS measuring equipment, and particularly, a measurement scenario of a wired network measuring equipment in a wired / wireless communication network sound quality measuring apparatus, which is defined by DTMF (Dual Tone Multi Frequency) through a wired / wireless telephone at a remote location The present invention relates to a remote control method of a MOS measuring device that can be controlled using a tone.

In recent years, with the rapid development of semiconductor and communication technology, mobile communication terminals have become widespread to become essential portable products of the whole nation, and new models with various functions are released one after another with the emergence of new technologies. It is replacing.

On the other hand, in the case of a telephone manufacturer, in order to manufacture a high quality telephone, it is necessary to check the actual voice quality of the telephone manufactured by the telephone manufacturer. It is necessary to confirm the actual voice quality for the purpose of optimizing, and MOS is proposed as a method of measuring voice quality. MOS (Mean Opinion Score) is a subjective sound quality measurement method that evaluates in five stages as shown in Table 1 below after calculating the average value of users' satisfaction given the actual voice voice to various users.

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

As described above, since the MOS measurement method is a subjective measurement method of the user, not only the objectivity is low but also the cost for the measurement is high. Therefore, automated and objectified methods are recently preferred. There is a Perceptual Speech Quality Measurement (PSQM) and Perceptual Evaluation of Speech Quality (PESQ), which is an algorithm specified in P.862 to cope with packet loss based on the PSQM.

On the other hand, such a MOS measurement method may be performed by measuring the actual call voice quality between the mobile communication terminals or the actual call voice quality between the mobile communication terminal and the landline phone, in this case between the two measurement equipment Synchronization of various selections / setpoints for MOS measurements must be carried out in advance.

However, in order to perform the synchronization of the selection / setting of the conventional call counterpart measuring equipment, two testers have to reside in the place where their own measuring equipment is installed or one tester visits the place where the counterparty measuring equipment is installed. Because of this, there was a problem such as a large amount of manpower or longer time for measurement.

The present invention has been made to solve the above-described problems, the control scenario of the wired network measurement equipment in the wired / wireless communication sound quality measurement equipment is controlled using a DTMF or remotely defined tone by a user via a remote wired / wireless telephone It is an object of the present invention to provide a remote control method for MOS measuring equipment.

In order to achieve the above object, the MOS measuring device remote control method of the present invention includes at least two voice call channels, and performs various procedures related to MOS measurement between the other party equipment through the voice call channel. In the MOS measuring equipment, one of the voice call channels is used as a remote control channel. (A) When the call is received from a remote wired / wireless telephone, the start of setting the MOS measurement scenario after opening the call path. Determining whether a start tone signal for notifying is received; (b) when the start tone signal is received in the step (a), determining whether an end tone signal for notifying the end of the MOS measurement scenario setting is received from the next received tone signal; and (c) the end tone. If a signal is received, the method further includes converting the received tone signal into corresponding control data and then storing the MOS measurement scenario before the end tone signal is received after blocking the communication path.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the MOS measuring device remote control method of the present invention.

1 is a network diagram of a system to which the MOS measuring device remote control method of the present invention is applied. As shown in Figure 1, according to the network configuration of the system to which the MOS measuring device remote control method of the present invention is applied, a plurality of landline network side MOS measuring equipment (LCG; Land Call Generator) (hereinafter simply referred to as 'MOS measuring equipment' 100, 200, and 300 are connected to a public switched telephone network (PSTN) 400 to enable mutual voice communication for MOS measurement.

In the above-described configuration, each of the MOS measuring devices 100, 200, and 300 has a plurality of, for example, a plurality of places in the rear, for example, to be able to simultaneously perform MOS measurements for eight wired telephones. The telephone connection jack of, for example, RJ-11 jack is provided, the present invention uses one of the plurality of telephone connection jack as a remote control channel. Hereinafter, the connection jacks to which the MOS measurement landline telephones 106, 206, and 306 are connected are referred to as 'measurement telephone connection jacks' 102, 202, and 302, and the control landline telephones 108, ( The connection jacks to which 208 and 308 are connected are referred to as 'control telephone connection jacks' 104, 204 and 304. In FIG. 1, reference numeral 420 denotes a mobile communication network 410 and a public telephone network in control wired telephones 108, 208, and 308 respectively connected to MOS measuring equipment 100, 200, and 300 to be controlled. A mobile communication terminal connected remotely via 400 to remotely control a measurement scenario to be performed in the MOS measuring equipment 100, 200, and 300, such a mobile communication terminal 420 is usually measured It can be used to remotely control the MOS measuring devices 100, 200, and 300, which are currently located in any of the MOS measuring devices 100, 200, and 300, in communication with them. Could be.

FIG. 2 is a block diagram of a MOS measuring apparatus to which the remote control method of the present invention is applied. For convenience, only a MOS measuring apparatus having a reference numeral 100 will be described. As shown in FIG. 2, the MOS measuring device 100 to which the remote control method of the present invention is applied includes a telephone line extended from a CPU 110 and a control wired telephone connection jack 104 to collectively control the overall operation of the device. Ring detection unit 111 to detect the ring received through it is transmitted to the CPU 110, the telephone loop monitoring control unit 112 for looping or unlooping the telephone line, demodulation after receiving a DTMF signal DTMF transmitter / receiver 114 for transmitting to the CPU 110 and generating a predetermined DTMF signal in response to a command from the CPU 110 to the telephone loop monitoring controller 112, and the CID provided through the telephone line. (Call IDentification) information to extract and provide to the CPU 110, the CID detection unit 113, a command / data storage unit 115 for storing various commands or data used in the MOS measurement process, the remote mobile communication terminal 420 Sent from) Is a DTMF buffer 117 for temporarily storing various setting DTMF data, a control data buffer 118 for converting DTMF data stored in the DTMF buffer 117 into corresponding control data and temporarily storing them, and a remote mobile communication terminal 420. Scenario storage unit 116 for storing the measurement scenario for the MOS measuring equipment 100 set by the), and stores a variety of voice or text guide message required in the scenario setting process for the mobile communication terminal 420 of the remote place And a voice / text guide message storage unit 119 and a MOS measurement algorithm 120. Here, the CID detection unit 113 may be used for checking a control counterpart and allowing only remote control through a mobile communication terminal having a predetermined telephone. The DTMF transmitter / receiver 114 may be implemented in a hardware configuration or in a software configuration performed by the CPU 110.

3 is a detailed functional block diagram of a general MOS measurement algorithm. As shown in FIG. 3, the detailed function of the MOS measurement algorithm applied to the present invention is a speech signal deteriorated or deteriorated through a volume level of a reference speech signal as a reference for MOS value measurement and an actual call with a landline telephone. The reference speech signal level adjusting unit 121a for adjusting the volume levels of the " call speech signal " and the call speech signal level adjusting unit 121b, and the reference speech signal and the call speech signal. Time delay caused by a pair of input filter units 122 and 123 that perform filtering to consider the bandpass characteristics of the receiver, and a speech signal received through a landline telephone. Time synchronization unit 124 for adjusting the starting point of the reference speech signal and the call speech signal equally, and the reference speech signal and the call. A pair of audible converters 125 and 127 which respectively remove the inaudible sound signal from the speech signal, a distortion degree calculator 126 that calculates a density difference between the reference speech signal and the loudness of the speech signal; The MOS is calculated by calculating the sound quality based on the difference in the sound size density calculated by the distortion section checking unit 128 and the distortion degree calculating unit 126 for confirming the distorted portion in the sound source section by the processing result of the distortion calculating unit 126. Sound quality calculation unit 129 for outputting a value can be made.

4 is a flowchart illustrating a method for remotely controlling a MOS measuring apparatus according to a preferred embodiment of the present invention, and unless otherwise stated, the CPU of the MOS measuring apparatus is performed as a subject. MOS measuring equipment given as an example will be described. As shown in Figure 4, according to the MOS measuring equipment remote control method of the present invention, first waiting for the lake scene through the control telephone connection jack 104 in step S10, and again in step S12, that is, a remote control mobile communication terminal ( It is checked whether there is a call reception from the telephone number assigned to the control telephone connection jack 104 from the 420, this check of call reception may be performed by the ring detection signal provided from the ring detection unit 111.

As a result of the determination in step S12, if the call is not received, the process returns to step S10. If the call is received, step S14 is performed after opening the call path. In this step S14, the CPU 110 performs voice / text. For the control connected to the control telephone connection jack 104 by playing back the guide voice (for example, the voice prompting to press the DTMF (#) key to start the control command) data stored in advance in the guide message storage unit 119. It is output to the landline telephone 108. Of course, this announcement could also be sent in text (as follows).

Next, in step S16, it is determined whether an arbitrary DTMF key signal has been received. This step S16 may be performed based on a signal received from the DTMF transmitter / receiver 114.

5A through 5E are graphs showing frequencies of the DTMF (#), DTMF (*), DTMF (0), DTMF (1), and DTMF (9) key signals, respectively, and the DTMF transmitting / receiving unit 114. A / D converts the received analog signal into a frequency domain by performing a fast fourier transformer (FFT). As shown in FIGS. 5A to 5E, each DTMF key signal has a unique frequency domain. have. Each MOS measuring device 100 stores the frequency data of the above-described tones as a table, and determines by the CPU 110 what DTMF the received signal is.

 As a result of the determination in step S16, if no DTMF key signal is received, step S16 is repeated, whereas if any DTMF key signal is received, the process proceeds to step S18 and the received key signal is a DTMF (#) key. Determine if it is a signal. If the received key signal is not a DTMF (#) key signal as a result of the determination in step S18, the key input is incorrect. Therefore, the process proceeds to step S20 and sends a voice error message to the remote control mobile communication terminal 420. Will return to.

On the other hand, when the DTMF (#) key signal is received, the flow proceeds to step S21 to send a voice message for ordering the input of the DTMF signal for setting the MOS measurement scenario to the remote control mobile communication terminal 420, and again in step S22. Accordingly, the DTMF key signal transmitted from the remote control mobile communication terminal 420 is received. Here, the DTMF format related to the scenario setting for MOS measurement is, for example, "[channel number (CH)] [*] [command (CMD)] [* (delimiter)] [data (DATA)] [* (delimiter). ] ", Which can be plotted as shown in Table 2 below.

STX CH Separator CMD Separator DATA Separator ETX # 0-99 * 0-9 * […] ] * #

As can be seen from the above Table 2 and the description of FIG. 4 described above, the DTMF key signals indicating the scene setting start (STX) and end (ETX) are (#) key signals. Next, the channel number CH means a telephone line for measuring sound quality assigned to the MOS measuring apparatus 100, that is, a telephone line to which settings are applied, and can be set from 0 to 99.

Here, if the number of channels per unit of the MOS measuring device 100 is eight, as described above, it may be measured using a plurality of them. Next, the DTMF (*) key signal indicates a delimiter for distinguishing a channel from a command and data or a field in the data. The command CMD is an execution or setting command to be applied to the selected channel. For example, the command CMD may be defined as shown in Table 3 below. Next, in the above Table 2, the data DATA indicates detailed data to be used in the setting commands, and this data has a different meaning for each command and may be set as additional information about the control command. The detailed specification of this data field may be as follows.

DTMF key Contents DTMF (1) Start measurement (no data field) DTMF (2) Measurement end (no data field) DTMF (3) Dial number setting DTMF (4) Operation mode setting DTMF (5) Auto Call Settings DTMF (6) Uplink Settings DTMF (7) Downlink settings

First, the format of the data field used to set the dial number specified by DTMF (3) in Table 3 above can be "(dial number) + (*) + (extension)", where (dial Number) is the telephone number of the other party's MOS measuring device to make a call when the operation mode is not Inbound Mode. (Extension Classification) specifies, for example, that the DTMF 1 sets the extension number before the telephone number as the extension, and the DTMF 2 omits the extension number as the outside line. In the case of the extension, the external connection number of the place where the MOS measuring device 100 is located is automatically set in front of the telephone number, for example, "DTMF (9)".

Next, the format of the data field used to set the operation mode defined as DTMF (4) in Table 3 above may be as shown in Table 4 below.

DTMF key Contents Explanation DTMF (0) Inbound Receive Mode DTMF (1) Simplex-Downlink Transmit mode-Unidirectional-Transmit side measurement mode DTMF (2) Simplex-Uplink Transmit mode-unidirectional-receive side measurement mode DTMF (3) Half-duplex Transmission mode-alternating measurement mode DTMF (4) Full-Duplex Transmission mode-bidirectional simultaneous measurement mode

Next, the format of the data field in the automatic call setup defined as DTMF (5) in Table 3 above is, for example, "(Idle Time) + (*) + (Setup Time) + (*) + (Traffic Time). ) + (*) + (Call Count) ". In this case, (Idle Time) is a time to rest before making a call. The unit may be seconds. Setup Time is the waiting time before a call is made and a call is made. The unit can also be seconds. (Traffic Time) is the time until the measurement is completed after the call is formed. The unit can also be seconds, and when the measurement is completed, the call ends. Finally, (Call Count) is a number indicating how many times the above three processes will be repeated.

Next, the data field format in the setting of the uplink defined by DTMF (6) in Table 3 above is, for example, "(Play File ID) + (*) + (Volume Level) + (*) + (Play Waiting Time) ". Here, (Play File ID) is a transmission sound source file for sound quality measurement, that is, the ID of the call speech signal file, (Volume Level) is the volume level of the transmission sound source, and (Play Waiting Time) was rested for a few seconds after transmitting the sound source. Is a time value indicating whether to set the next sound source.

Finally, the format of the data field in the setting of the downlink specified by DTMF (7) in Table 3 above is, for example, "(Reference File ID) + (*) + (Volume Level) + (* ) + (Encode Format) ". Here, (Reference File ID) is the ID of the reference file for calculating the sound quality measurement value, that is, the reference speech signal file, (Volume Level) is the volume level of the received sound source, and (Encode Format) is used to record the received sound source. The file format to be used can be 1: 8bit Mu-Law, 2: 8bit A-Law, or 3: 16bit-PCM.

4 again, in step S24, it is determined whether the DTMF (*) key signal is input, and if not, the flow advances to step S30 to determine whether the DTMF (#) key signal is input. As a result, if the DTMF (#) key signal is not input, the scenario setting is not completed yet. The process proceeds to step S32 to store the DTMF data received so far in the DTMF buffer 117 and returns to step S22. On the other hand, when the DTMF (*) key signal is input as a result of the determination in step S24, since the input of the channel CH, the command CMD, the data, or the field values in the data is separated, the step is performed. The flow advances to S26 to read DTMF data stored in the DTMF buffer 117 so far, and converts it to control data in step S28 and stores it in the control data buffer 118 before returning to step S22.

On the other hand, if the DTMF (#) key signal is input in step S30, it corresponds to the case where the scenario setting is finished. Therefore, the control unit stores the control data stored in the control data buffer 118 after blocking the communication path and proceeding to step S34. After the shipment, it is stored in the scenario storage unit 115 in step S36. Afterwards, the MOS measurement is performed based on the contents stored in the scenario storage unit 115.

The method of remotely controlling the MOS measuring apparatus of the present invention is not limited to the above-described embodiments, and various modifications can be made within the range permitted by the technical idea of the present invention. In the above, the scenario setting by the DTMF has been described, but the method of the present invention is not limited thereto, and may be implemented by another tone signal predefined between the user, and even when the DTMF is used, the start and end of the scenario and The delimiter may be implemented using a key signal different from the above. Also, although not shown, if the scenario set by the user is not valid, that is, if the channel, command, or data is not predefined, the user is prompted to cancel the scenario setting and continue to set it. You may.

Furthermore, in the above-described embodiment, the remote control terminal is described as a mobile communication terminal, but the present invention is not limited thereto and may be implemented as a wired telephone. In the following claims, such mobile communication terminal and wired telephone are collectively referred to as' Wired / wireless phones are called.

According to the remote control method of the MOS measuring device of the present invention as described above, the tester does not need to reside for remote measurement scenarios remotely, and to measure the scenario to be measured without a notebook computer or other additional device for wired / wireless sound quality measurement. It can be controlled remotely, the device used for remote control can be used as it is, the remote control can be used even in the area where TCP / IP network does not exist, and it can also be used in the form of ARS (Automatic Response System). It is easy to use because it can be controlled.

Claims (12)

delete delete delete delete One of the voice call channels is used as a remote control channel in a MOS measuring device having at least two voice call channels and performing various procedures related to MOS measurement with the other party's equipment through the voice call channel. By the way, (a) In the case of receiving a call from a remote wired / wireless telephone, after opening a communication path, the start of setting the MOS measurement scenario, the input of a command or data, the end of the setting of the MOS measurement scenario or the input error. Transmitting guide voice or text to the remote wired / wireless telephone; (b) determining whether a start tone signal is received to indicate the start of setting up the MOS measurement scenario; (c) when the start tone signal is received, determining whether an end tone signal indicating completion of the MOS measurement scenario setting is received among subsequent received tone signals; (d) if the termination tone signal is received, converting the received tone signal into corresponding control data after cutting off the call path and storing the signal as a MOS measurement scenario before the termination tone signal is received; under, A DTMF key signal is used as the tone signal, and one of a DTMF (#) key signal and a DTMF (*) key signal is used as the start tone signal and the end tone signal. And the other one of the DTMF (#) key signal and the DTMF (*) key signal as a separator tone signal for distinguishing a channel, the command or data, and a field inside the data. The method of claim 5, wherein a DTMF (#) key signal is used as the start tone signal and the end tone signal, and a DTMF (*) tone signal is used as the separator tone signal. The MOS measurement scenario type is a channel number + [*] + [command] + [*] + [data] + [*] remote control method of the MOS measuring equipment, characterized in that consisting of. The method of claim 6, wherein the command comprises a measurement start and measurement end command, a dial number setting command, an operation mode setting command, an auto call setting command, an uplink setting command, or a downlink setting command in the form of no data field. MOS measuring equipment remote control method. 8. The method of claim 7, wherein the format of the data field used in the dial number setting command is (dial number) + (*) + (extension). The method of claim 7, wherein the operation mode that can be set by the operation mode setting command includes a reception mode (Inbound), a transmission mode-unidirectional-transmission side measurement mode (Simplex-Downlink), and a transmission mode-unidirectional-reception side measurement mode (Simplex). -Uplink), transmission mode-alternating measurement mode (Half-Duplex), transmit mode-alternating measurement mode (Full-Duplex) selectable remote control method for MOS measuring equipment. The method of claim 7, wherein the format of the data field used for the automatic call setup command is (Idle Time) + (*) + (Setup Time) + (*) + (Traffic Time) + (*) + (Call Count) MOS measuring equipment remote control method, characterized in that consisting of. 8. The MOS measurement according to claim 7, wherein the data field format used in the uplink setting command comprises (Play File ID) + (*) + (Volume Level) + (*) + (Play Waiting Time). Equipment remote control method. 8. The MOS measuring device of claim 7, wherein the data field format used in the downlink setting command is (Reference File ID) + (*) + (Volume Level) + (*) + (Encode Format). Remote control method.

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