Manual QualiPoc Test Description Speech

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WHENQUALITYMATTERS

QualiPoc 10.6 Speech and VideoTest Description

April 2011

SwissQual License AGAllmendweg 8 CH-4528 Zuchwil Switzerland

t +41 32 686 65 65 f+41 32 686 65 66 e [email protected]

Part Number: 16-100-200549-1 Rev 10.6


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QualiPoc 10.6 Speech and Video Test Description

2000 - 2011 SwissQual AG

Contents |

CONFIDENTIAL MATERIALS

ii

Contents

1 Introduction .......................................................................................................................................... 1Overview of Speech and Video Call Tests ............................................................................................ 1A-Side and B-Side Tests ....................................................................................................................... 2

Video Call Tests ............................................................................................................................... 2Call Direction .................................................................................................................................... 3Sample Direction During a Test ....................................................................................................... 4Sequence of Call Setup and Playing Samples................................................................................. 4

Call to Any Number Test ....................................................................................................................... 5Call to Diversity Voice Server Test ........................................................................................................ 5

2

Configuring an A-Side or B-Side Speech or Video Call Test .......................................................... 7

Configuring a Diversity Voice Server as a B-Side Device .............................................................. 11Starting a Double-Ended Speech or Video Call Test .......................................................................... 12Monitoring a Speech or Video Call Test .............................................................................................. 12

Log View ......................................................................................................................................... 133 Configuring a Speech o r Video Call to Any Number Test ............................................................. 15

Starting a Call to Any Number Test ..................................................................................................... 16Monitoring a Call to Any Number Test ................................................................................................. 17

A Abbreviations ..................................................................................................................................... 18Figures

Figure 1-1 Overview of a speech call test ......................................................................................................... 3Figure 1-2 Call direction for a 2:1 MOC/MTC ratio ............................................................................................ 4Figure 1-3 Sample direction during a measurement ......................................................................................... 4Figure 1-4 Sequence of tones and samples ...................................................................................................... 5Figure 2-1 Creating a new A-Side or B-Side test .............................................................................................. 7Figure 2-2 Main J ob edit view for an A-Side or B-Side test ............................................................................... 7Figure 2-3 General settings for an A-Side or B-Side test .................................................................................. 8Figure 2-4 Total test duration for A-Side or B-Side test .................................................................................... 9Figure 2-5 Reference sample settings ............................................................................................................. 10Figure 2-6 Timing options for an A-Side or B-Side test ................................................................................... 10Figure 2-7 Log view for a Speech or Video Call test ....................................................................................... 13Figure 3-1 Creating a new Call to any number test ......................................................................................... 15Figure 3-2 Main settings for a Call to any number test .................................................................................... 15Figure 3-3 General settings for a Call to any number test ............................................................................... 16Figure 3-4 Main settings for Call to any number test ....................................................................................... 16Tables


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Contents |


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Table 2-1 Description of the settings on the main J ob edit view for an A-Side or B-side test ........................... 7Table 2-2 Description of general settings for an A-Side and B-Side test .......................................................... 8Table 2-3 Description of the reference sample settings .................................................................................. 10Table 2-4 Description of the timing options for an A-Side or B-Side test ........................................................ 10Table 2-5 Description of events in the Log view for a Speech or Video Call test............................................ 13Table 3-1 Description of the settings in the main J ob Edit view for a Call to any number job ....................... 15Table 3-2 Description of the General settings for a Call to any number test ................................................... 16Table A-1 Description of abbreviations ............................................................................................................ 18


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Chapter 1 | Introduction


1

1 Introduction

TheQualiPoc 10.6 Speech and Video Test Description provides an overview of the following types ofQualiPoc Speech and Video Call/Streaming tests:

Speech: A-Side and B-Side LQ assessment tests

Call to any number (access test)

Video call test (access test)

Video call to any number (access test)

Note: For a description of the abbreviations in this document, see the "Abbreviations"section on page18.

Intrusive, that is, double-ended tests, require a dedicated channel in the test system. The test transmits apredefined reference signal through this channel. The test assesses the quality of the calls by comparing the

originating call signal (A-Side) to the received call signal (B-Side).Non-intrusive tests, that is, single-ended tests do not require a dedicated channel in the test system. Thesetests assess an unknown sample and do not occupy network resources to the same extent that intrusivetests do.

Overview of Speech and Video Call Tests

You can perform the following QualiPoc Speech Call tests to assess the functionality and quality of speechcalls on a network.

Note:To calculate the MOS speech quality, QualiPoc sends a predefined reference audio sample overthe network.

Speech Call Test: Assesses the functionality and quality of voice calls on a network. You can startthe call on an A-Side or a B-Side device, which can be a mobile phone or a Diversity voice server.You can also use a dedicated service number, that is, IVR, for either side of the test.

Call to Diversity Voice Server: Standard speech test where the Voice Call Server is controlled withDTMF tones that are sent to an ISDN or PSTN device that is connected to the server. You need touse this test if your Voice Call Server does not have access to an IP enabled network.

Note: Before the test starts, the A-Side device sets up a full configuration call to select the test on the B-Side and to synchronize the measurement windows of both sides.

Call to Any Number Test: Simple variant of the standard speech test that sets up a call for aspecified amount of time. This test does not assess the speech quality of the call.

Video Call Test: Same as the standard speech test except that the call is a video call instead of avoice call. This test cannot record the call.

Video Call to Any Number: Same as the Call to any numbertest except that the call is a video callinstead of a voice call.


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A-Side and B-Side Tests

During a double-ended speech or video call test, the following sequence of events occurs:

One device initiates a configuration call to the other device

Other device sends a synchronization tone to the calling device

Calling device synchronizes to the tone and the sample sequence starts on both devices

One device starts to play a speech or video sample

Other device records the sample

Note: Video call tests cannot record the sample.

Recorded sample is compared to a local reference and MOS quality value is calculated.

Calling device terminates the call

This sequence repeats for the amount of cycles, that is, window duration that you specify for the test. Formore information on test settings, see the "Configuring an A-Side or B-Side Speech or Video Call Test"chapter on page 7.

Configuration calls are required for Mobile to Mobile and Mobile to Diversity Voice Server B-Side deviceswhile the following tests do not require a configuration call:

Call to any number

Call to Answering Station or Service Number (IVR)

Figure 1-1 on page 3 provides an overview of a speech call test. The general flow of a speech call is similaron the A-Side and B-Side devices except for the call and the sample directions.

Each test starts with the 1st

call setup delay which is followed by a consecutive series of call windows, that is,cycles. These two parameters are the same on both sides of the test.

Note: On a trace capable phone, the call starts with trace capability setup which is followed by the actualtest phase, that is, 1st call setup delay and the call windows.

The behaviour of the test inside the call windows is determined by the job settings that you specify and thenetwork conditions. For a successful test, the call connects before the 1

stcall setup delay expires and

terminates before the guard time ends. The guard time ensures that the call successfully terminates at theend of the test cycle.

If the first call setup fails and the call terminates when the timeout is reached, the test attempts to reconnectafter the amount of time that you specify. However, if this attempt exceeds the guard time, the calldisconnects.

Video Call Tests

The test flow for Video call is exactly the same as for the speech call test. The main difference is that the callis a video call instead of a speech call.

A Video Call Test establishes a Video Call and calculates the video quality of the presented video display.This test can only be done on trace-capable phones. To establish a Video Call there must be a 3G Networkavailable.

A Video Call Test with video quality evaluation (MOS-Value) must establish the call to a Video Call Serverwhich transmits a predefined video sample to the A-Side. In combination with NQTM such a test can beeasily configured and run automatically.


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Figure 1-1 Overview of a speech call test

Call Direction

The call direction of A-Side and B-Side tests is specified by Mobile Originated Call (MOC) and MobileTerminated Call (MTC) values respectively.

Parameter Ratio X Value

MOC-only MOC/MTC =X:0 (X>0)

MOC/MTC MOC/MTC =1:X (X>0)

MTC-only MOC/MTC =0:X (X>0)

For example, if the MOC/MTC ratio is 2:1, the A-Side device initiates the call in the first two call windowswhile the B-Side device initiates the call in the third call window. Similarly, the B-Side device terminates thecall in the first two call windows while the A-Side device terminates the call in the third call window. The test

Call Window Call Window Call Window

Windowduration

Call Window

Start

dial

Connect

Guard Time

Call WindowCall Setup

Start

dial

Disconnect

becausefailed

Pause Guard Time

Max. Call

Setup Time

Call Setup

Call Setup Call

Call

Start

dial #2Connect

Disconnect

becauseGuard Time

1stCallSetup Delay

Trace setup(10sec),only on

TRACEmobiles

Windowduration

Windowduration

Overall J ob duration

Call duration

Call duration


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repeats this call direction sequence for the duration of the measurement.

Figure 1-2 Call direction for a 2:1 MOC/MTC ratio

Sample Direction During a Test

During a double-ended test one side plays a sample and the other side listens for and measures the qualityof the sample. The sample direction can either be from A to B, where the A-Side device plays the sampleand B-Side device listens for the sample or from B to A, where B plays the sample and A listens for thesample. The test repeats this sample direction for the duration of the measurement.

Note: Each test is equal to one speech sample.

Figure 1-3 Sample direction during a measurement

Sequence of Call Setup and Playing Samples

After a successful call setup, the test plays a defined sequence of sounds on the called side. The A-Sidesearches for this BD-DTMF sequence, that is, synchronization tone and then starts to record and evaluatethe speech samples.

Call Window Call Window Call Window

1stCall

Setup Delay

Trace setup

(10sec),only onTRACE

mobiles

Call Window Call Window Call WindowB-

A-

B-

A- Sample Interval Sample Interval Sample Interval

Sample Interval Sample Interval Sample Interval


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Figure 1-4 Sequence of tones and samples

The called side plays the following sequence of tones and samples:

Twitcher and Cocodjojo sample: Serves as line opener for QualiPoc

Synchronization sample: Combination of four multi-frequency tones, namely a regular DTMF B-Tone and D-Tone as well as two higher frequency tones that are outside of the DTMF-frequencyrange which trigger the recording start on QualiPoc phones. This reference sample is played afterthe Connect to synch delay that you specify.

Note: For standard answering machines, this delay is 7 seconds. The delay must provide the phoneenough time to play the sample and to switch between the phone application and the QPAEngine afterthe connection is established.

WAV reference speech sample: Plays 2.6 seconds after the synchronization sample start. Thevoice starts on the reference sample after two seconds of silence, so the actual delay is 2.8 secondsfor the standard sample. The length of the interval in which the speech sample repeated playsdepends on the length of the sample, for example, a 5 second sample corresponds to a 20 secondinterval and a 6 second sample corresponds to a 25 second interval.

Call to Any Number Test

The Call to Any Number test procedure is the same as the speech tests that are described in the "A-Sideand B-Side Tests" section on page 2 except for the following differences:

Call duration is limited to 60 seconds if you use Test Manager to configure the test

Test has only one pause value, which is also used as the value for the guard time

Note: For the Video Call to Any Number Test, QualiPoc attempts to establish a video call with thereceiving end.

Call to Diversity Voice Server Test

The Call to Diversity voice server test procedure is similar to the speech tests that are described in the"A-

Side and B-Side Tests" section on page 2. The only difference is that the configuration call uses in-bandDTMF tones to select the corresponding test and in a second sequence, to synchronize the call windows forthe measurement.

Startdial

Connect

Call Setu CallSample Sample

Twitcher &Cocodjojo

Synch

Speech sampleSpeech sample

Sample Interval Sample Interval

Synch to

Sampledelay

ConnecttoSynch


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6


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Chapter 2 | Configuring an A-Side or B-Side Speech or Video Call Test


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2 Configuring an A-Side or B-Side Speech or Video Call Test

This chapter describes how to manually configure an A-Side or B-Side speech or video call in theQPAEngine software on your phone. The B-Side device can be a mobile phone, a Diversity Voice Server, ors a specially configured service number, that is, answering station.

The configuration of the A-Side and B-Side devices is identical. The only difference is the J ob ID thatQualiPoc automatically assigns the B-Side test.

To manually create an A-Side or B-Side call test

1. Start QPAEngine on the phone and select Options > Job handling > Speech Call, and then select CallMOS (A-Side) orCall MOS (B-Side).

Note: For a video call, select Options > Job handling > Video Call/Streaming .

Figure 2-1 Creating a new A-Side or B-Side test

2. Specify the basic job settings.

a SelectOptions > Create New.

Tip: If the view contains an existing job, you can select the job, select Options > Duplicate, and thenselectOptions > Edit.

Figure 2-2 Main J ob edit view for an A-Side or B-Side test

Table 2-1 Description of the settings on the main J ob edit view for an A-Side or B-side test

Setting Description

Job Name Name of the test

General settings Specifies the duration, cycle, and general timings for the test.

Tests Select an existing test or create a new test

Timings Specifies the detailed timings of the tests such as the MOC:MTC ratio or Windowduration.


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Setting Description

B side type

(A-Side test only)

Select one of the following B side device types:

Answering Stat ion: Select this type if you do not want the B-Side

device to generate measurement files QualiPoc Unit : Mobile phone with QPAEngine software

When the B-Side test starts, QualiPoc generates a unique jobidentifier so that NQDI can synchronize the measurement resultsfrom both sides. You need to type this identifier on the A-Sidephone when the test starts.

Diversity Voice Server: B-Side device is a voice server

Note: For information on how to configure the Diversity Voice Server asa B-Side device, see the "Configuring an A-Side or B-Side Speech orVideo Call Test" on page 7.

Voice Server Job-ID(For Diversity Voice ServerB-side type)

Enter a unique number to identify the test. This ID is validated when yousave the job.

Record hang over [ms]For the Qp_Default reference sample, this value must be 14500 ms. Forother reference samples, this value must be 18500 ms.

Average cal l setup [s]Enter the amount of time in seconds for the call setup procedure. QualiPocuses this value to calculate the remaining time for the tests within a call.This value has a direct impact on the Total Duration of the test.

4. SelectTests, and then select Options > Add > New Test.

Note:You cannot specify the Total test duration value. This value is automatically calculated based on

the Test seq. repetition, Record hang over, andAverage cal l setup values as well as the referencesample that you choose. You can use this value to help you to determine the call window for the test.

Figure 2-4 Total test duration for A-Side or B-Side test

5. SelectOptions > Change.

6. Select the test, for example, Test 1:Speech, specify the reference sample settings, select Back, andthen select Back.


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Setting Description

Window duration [s]

Enter the amount of time in seconds for the call window during which onemore call setups can occur. If a call setup fails, the test attempts the setup

repeatedly until the window duration expires. QualiPoc automaticallyterminates a call that exceed the window duration.

The call window must be long enough to accommodate the 1st call setupdelay, the call duration, the guard time, and an additional three seconds.

Use call durationSelectOn to automatically disconnect the call after the call duration that youspecify.

Call duration [s]

(Only if Use call duration isset to On)

Enter the amount of time in seconds between the Dial and Disconnectcommands. This amount cannot exceed the Window duration minus theGuard time.

Pause duration [s]Enter the amount of time in seconds to wait between the last call

termination and the next Dial command.

1st call setup delay [s]Enter the amount of time in seconds for the test to wait before the first callsetup. If the time expires before the call connects, the test ends.

Guard time [s]Enter the amount of time in seconds for the buffer time at the end of the callwindow during which QualiPoc disconnects the call.

No call setup time [s]Enter the amount of time in seconds during which the test does notreattempt a call. This set point in time occurs at the end of each callwindow.

Pause after failed calls [s]Enter the amount of time in seconds for the test to wait between a failed testand a call reattempt.

Max failed calls

Specifies the number of consecutive failed calls after which a call reattemptis made.

Note:This setting does not apply to dropped calls.

Pause after max. failedEnter the amount of time in seconds to wait after the test reaches the Maxfailed calls limit.

Max. call setup time [s]Enter the maximum amount of time in seconds for the test to try to establisha call. If the test does not establish a call within this time, the call fails andthe test proceeds to the next call.

No connection timeout [s]Enter the amount of time in seconds to wait for a call to occur before thetest stops.

8. SelectBack, and in the save dialog box, select Yes.

Configuring a Diversity Voice Server as a B-Side Device

After you create and save a Call-MOS (A-Side) test that uses a Diversity Voice Server as a B-Side device,you need to copy the configuration file from the phone to the server.

To copy the configuration file to the Diversity Voice Server without a connection

1. Connect your phone to your PC.

Connect the data cable to the PC and then connect the other end of the cable to the phone.

Enable Bluetooth connectivity on your phone and on your computer.

Note: SwissQual ships most mobile phones with Bluetooth enabled. If you need to enable Bluetooth,


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consult the manufacturer manuals for your phone and your computer.

2. Copy the following B-Side device configuration file from your phone to your computer:

C:\data\QualiPoc\DataTest\Jobs\VoiceServer\Job_123.ini

3. Copy the Job_123.ini file to the following location on the Diversity Voice Server:

C:\Documents and settings\All users\Application data\SwissQual\Diversity\Tasks\PreDefinedJobs

Important:The three digit number in the filename must be unique on the server. This number istransmitted during the configuration call as in-band DTMF tones to identify the job that the DiversityVoice Server has to start.

Starting a Double-Ended Speech or Video Call Test

At the start of a Data Call test, QualiPoc opens a GPRS session through the access point that you

configured for QPAEngine on the phone. For information on how to configure an access point, see Manual -QualiPoc SW - Active Engine.pdf.

QualiPoc uses an adapted version of the Squad LQ algorithm to calculate the MOS of the speech samplesthat are received. Depending on the processing power of the phone, the algorithm takes 5 to 15 seconds tocalculate the MOS. The amount of time between two speech samples is 20 to 30 seconds is determined bythe length of the reference sample.

To manually start a double-ended Speech or Video Call test in QPAEngine

1. On the B-Side device, start the B-Side test.

a In QPAEngine, select Options > Start a job > Choose from List > Speech Call.

Note: For a video call, select Video Call/Streaming.

b SelectCall-MOS (B-Side) and select Start.

c Take note of the Job ID for the B-Side test in the Status view.

2. On the A-Side device, start the A-Side test.

a In QPAEngine, select Options > Start a job > Choose from L ist > Speech Call.

b SelectCall-MOS (A-Side) and select Start.

c In the Start Job view, select Yes.

d In the TID from BSide Job box, enter the Job ID from the Status view of the B-Side test, and thenselectOK.

Note: NQDI uses this ID to match the measurement files from both sides of the test when you import thefiles into the NQDI database.

Monitor ing a Speech or Video Call Test

This section describes the events that you can monitor during a Speech or Video Call test. The events inTable 2-5 are for A-Side, B-Side, and Call to any number speech and video call tests as well as DiversityVoice Server tests.


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Event Description

SQUAD

(A-Side and B-Side

speech tests only)

Analysis of the speech sample has started.

Synch: xxMF-xx;

(A-Side and B-Sidespeech tests only)

A multi-frequency code that is used for recording synchronization has beendetected. Xx indicates the type and digits that were found.

VMON failed: -20

(Video Call on NokiaN80 only)

A signal was not found during the recording and MOS analysis failed.

VMON failed: -30


Signal recording is incomplete so the MOS analysis failed due to lostsynchronization.

VMON LQ: x .xx(Video Call on NokiaN80 only)

Analysis of the speech sample was successful. The value displayed is the MOSvalue.

VMON


Analysis of the speech sample has started.

Stopping a Call to a Diversi ty Voice Server without a Connection

If you stop a test on the phone that involves the Diversity Voice Server, QPAEngine plays a "stop" reference

sample instead of a speech sample, and then exits the test. Upon receipt of the "stop" sample, the voiceserver component of the test automatically stops.

Important: If QPControl in advanced mode cannot end the current cycle and play the "stop" samplewithin 50 seconds, QPControl forces a stop. The voice server restarts the task after the test durationexpires or when you start a new configuration call. Such a scenario can occur if the samples finishplaying and recording before the call duration expires.


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Chapter 3 | Configuring a Speech or Video Call to Any Number Test


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3 Configuring a Speech or Video Call to Any Number Test

This section describes how to manually configure a Speech or video Call to Any Number test in theQPAEngine software on your phone.

You only need to configure the test on the A-Side device. Although you do not need a dedicated B-Sidedevice, the device that receives the call must be able to answer the call and hold the connection until the A-Side phone terminates the call. The Call to Any Number test does not perform a speech quality assessment.

To manually create a Call to Any Number test

1. Start QPAEngine on the phone and select Options > Job handling > Speech Call > Call to anynumber.

Note: For a video call, select Options > Job handling > Video Call/Streaming .

Figure 3-1 Creating a new Call to any number test

2. Specify the basic job settings.

a SelectOptions > Create new.

Tip: If the view contains an existing job, you can select the job, select Options > Duplicate, and thenselectOptions > Edit.

Figure 3-2 Main settings for a Call to any number test

Table 3-1 Description of the settings in the main J ob Edit view for a Call to any number job

Setting Description

Job Name Name of the test

General settings Specifies the duration, cycle, and timings for the test.

Tests Select an existing test or create a new test

b SelectJob Name, enter a name for the job, and then select OK.


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3. SelectGeneral settings, specify the timing options for the test, and then select Back.

Figure 3-3 General settings for a Call to any number test

Table 3-2 Description of the General settings for a Call to any number test

Setting Description

Duration Enter the maximum measurement time for the test after which the testautomatically stops. To disable this feature, enter 0.

Cycles Enter the maximum number of cycles, that is, call windows, for the test. Todisable this feature, enter 0.

Note: If you specify a maximum number of cycles and a maximumduration, the test stops when one of the maximum values is reached.

Pause between cycles Enter the amount of time in seconds to wait between test cycles.

Max. connect timeout Enter the amount of time in seconds

4. SelectTests, and then select Options > Add > New Test.5. SelectOptions > Change.

Figure 3-4 Main settings for Call to any number test

6. SelectDuration, enter the amount of time for the call in seconds, and then select OK.

7. SelectNumber, enter the phone number to call, and then select OK.

8. SelectBack, and in the save dialog box, select Yes.

Starting a Call to Any Number Test

At the start of a Data Call test, QualiPoc opens a GPRS session through the access point that youconfigured for QPAEngine on the phone. For information on how to configure an access point, see Manual -

QualiPoc SW - Active Engine.pdf.


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To manually start a Call to any number test in QPAEngine

1. SelectOptions > Start a job > Choose from List > Speech Call.

Note: For a video call, select Video Call/Streaming.

2. Select a test category in the list, for example, Call to any number.

3. Select a test in the list and then select Start.

Monitor ing a Call to Any Number Test

For a description of the events that you can monitor during a Call to any number test, see the "Monitoring aSpeech or Video Call Test" section on page 12.


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A Abbreviations

Table A-1 Description of abbreviations

Abbreviation Descript ion

DTMF Dual-tone multi-frequency

GSM Global System for Mobile Communications

IP Internet Protocol

ISDN Integrated Services Digital Network

IVR Interactive Voice Response is an interactive technology that allows a computer to detectvoice and keypad inputs.

LQ Listening Quality on a five-point MOS (Mean Opinion Score) scale. The value 1 refersto bad quality, the value 5 means excellent. By practical reasons, objective measures

for LQ are limited at 4.5, which indicate that the signal to be measured is identical to theused reference signal.

MOC Mobile-Originated Call (synonym for the calling side), used for the MOC:MTC Ratio inthe Intrusive J ob timings

MOC-only This is indicated if the MOC:MTC Ratio in the Intrusive J ob timings is set to 1:0

MOS Mean Opinion Score, Value of the listening quality

MTC Mobile-Terminated Call (synonym for the call terminating side ), used for the MOC:MTCRatio in the Intrusive J ob timings

NQTM TestManager

PSTN Public Switched Telephone NetworkQPA QualiPoc Active Engine

UMTS Universal Mobile Telephone System

WAV Waveform audio format