Playbox QCBOX User manual

QCBOX USER MANUAL
This guide explains how to use the basic functionalities of the QCBox v 1.2.
www.playboxtechnology.com

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Legal notice
The information in this manual is furnished for informational use only. No part of this manual may be reproduced or transmitted in any form or by any
means, electronic or mechanical, for any purpose, without the prior written permission of PlayBox Technology UK Ltd.
The software, described in this manual, is owned by PlayBox Technology UK Ltd. It is protected by Copyright Law of England and Wales, as well as by
international copyright treaties, and may be used or copied only in accordance with the license agreement.
PlayBox Technology UK Ltd provides this manual “as is” without any warranty, either express, or implied.
This publication may contain typographical errors or technical inaccuracies. While every precaution has been taken in the preparation of this document,
PlayBox Technology UK Ltd assumes no responsibility for errors or omissions. Nor is any liability assumed for damages, resulting from the use of the
information, contained herein. Changes are periodically made to the information herein. They will be incorporated in new versions of the manual. Please,
check the PlayBox Technology UK Ltd website regularly for User Manual updates.
PlayBox Technology UK Ltd may introduce changes or improvements in the products, described in this manual at any time, without any special notice.
Please, address your comments or questions to:
Playbox Technology UK Ltd
Brookmans Park Teleport
Great North Road
Hatfield AL96NE
United Kingdom
www.playboxtechnology.com
[e-mail]

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Contents
Legal notice................................................................................................................................................................................... 2
Contents........................................................................................................................................................................................3
Preface ..........................................................................................................................................................................................4
StyleConventions ......................................................................................................................................................................... 5
GETTINGSTARTED ........................................................................................................................................................................6
QUICK START.........................................................................................................................................................................................................................................................................................6
USERINTERFACE ........................................................................................................................................................................... 7
THE QCBOX TOOLBAR.......................................................................................................................................................................................................................................................................7
THE FILES SET........................................................................................................................................................................................................................................................................................8
TEST LOG................................................................................................................................................................................................................................................................................................8
MENU BAR ....................................................................................................................................................................................9
FILE MENU..............................................................................................................................................................................................................................................................................................9
Auto mode.....................................................................................................................................................................9
New QCT Source (Folder).............................................................................................................................................9
New QCT Source (Playlist)...........................................................................................................................................9
New QCT Source (Set of files)......................................................................................................................................9
New QCT Source (Text file)..........................................................................................................................................9
Clear logs ......................................................................................................................................................................9
Clear Files Set and Logs ...............................................................................................................................................9
Exit.................................................................................................................................................................................9
SETTINGS MENU ............................................................................................................................................................................................................................................................................... 10
General........................................................................................................................................................................10
Auto mode...................................................................................................................................................................11
Test presets .................................................................................................................................................................12
TESTS MENU....................................................................................................................................................................................................................................................................................... 15
HELP MENU........................................................................................................................................................................................................................................................................................ 15
AUDIOLEVELS NORMALIZING...................................................................................................................................................16
WHAT ACTUALLY HAPPENS IN AIRBOX WHEN NORMALIZING?...................................................................................................................................................................................... 16
PLAYBOX WORKFLOW .................................................................................................................................................................................................................................................................... 16
OVERVIEW........................................................................................................................................................................................................................................................................................... 16
HOW TO APPLY THE NECESSARY SETTINGS? .......................................................................................................................................................................................................................... 17
Adjusting QCBox.........................................................................................................................................................17
Adjusting AirBox ........................................................................................................................................................18
APPENDIX –Formula for Success (%) in QCBox........................................................................................................................19
SAMPLE METADATA FILE................................................................................................................................................................................................................................................................ 20

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Preface
Dear PlayBox customer,
Thank you for purchasing our product! We would like to assure you that you have chosen the most cost-effective and versatile TV
automation system on the market. As always, we are trying to stay close to our customers’ needs, making sure they all receive adequate
support and satisfaction. Your opinion about our product is an exceptionally valuable source of information for us. The ease of working
with the PlayBox products results mainly from the suggestions and comments of our current respected customers.
This manual is structured into several sequential chapters, each aiming to ease the installation, fine tuning, and use of our products. We
hope that you will enjoy working with it, and we are anxiously looking forward to receiving your feedback.
Please, send your questions, suggestions, and assistance requests to:
[e-mail]
General feedback:
[e-mail]

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Style Conventions
•File names, software, documents or terms are written in italics
▪The data is written in the settings.ini file.
▪The file is located in C:\Program Files\DMT\AirBox
▪For further information read Shortcuts reference book.
▪The VTR is controlled via RS-422.
•Direct quotations from the computer screen are presented as follows:
▪Menu Items and commands
▪Tab/Page names
▪Column names (i.e. in a playlist or another grid)
▪Field names, check boxes
▪ Buttons
▪Screen readings are written in [square brackets]
▪The keyboard keys are enclosed in <> signs
▪Terms are defined in the Glossary at the end of the manual
•The arrows, used in the setting procedures mean as follows:
▪➔ A menu item follows;
▪ A page(tab) name follows;
▪→ A field name, a check box name, or a value name follows.
Except for arrows, you can distinguish between the relevant menu categories also by the styles, listed above.

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GETTING STARTED
QCBox is a quality control tool, intended to guarantee the successful playout of media files in AirBox. QCBox checks directories, playlists or sets of files.
Content verifications include loudness measurement and/or detection of missing audio/video samples. QCBox stores quality data about each checked
media file to an *.mtd file. AirBox can play or skip a clip depending on that quality data and the user settings.
QUICK START
1. Launch QCBox.
2. Go to Settings > Test Presets. The Tests Settings dialog will open.
3. In the Test settings dialog, select a predefined test from the Test presets field
OR
Define a custom test preset: right-click somewhere in the Test presets field, select Add, and enter a name to the new preset. Select the test
plug-in(s), which will be used to verify the content from the All available test plugins lists and click OK.
4. On the File menu, select a New QCT source. The source can be a Folder, an AirBox playlist, a Set of files, or a Text file.
5. In the New QCT source dialog that follows, specify a Media Source location. This is the location where the media files for tests are stored.
6. Select a Test preset from the drop-down list and click OK. All the files from the specified location will be listed in the Files set area of the
main QCBox window.
7. Go to Tests > Start to start the test procedure.
Congratulations! You have just started QCBox!

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USER INTERFACE
The user interface of QCBox is simple and easy to use. It consists of a Menu bar, a Toolbar, a Media files list and a Test Log.
Menu bar
Toolbar
Media files
Test log
THE QCBOX TOOLBAR
The QCBox Toolbar provides quick access to important QCBox functionalities. Icons on the toolbar match some of the commands, available on the
Menu bar.
New QCT Source (Folder) –select a folder with media files for tests.
New QCT Source (Playlist) –select a source playlist. Media files that match playlist items will be checked. Files can be stored on different
locations. Only files in the *.ply format are supported!
New QCT Source (Set of files) –select multiple files from a single location.
New QCT Source (Text file) –load a text file, containing a list of files for test, including their file paths. The files should be listed in the
following format:

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Clear Logs –clears the test log.
Clear Files Set and Logs –clears the file list in the Files set, and the test log.
Start Tests –starts the test procedure.
Stop Tests –stops the test procedure.
THE FILES SET
The files set contains the list of media files, available on the selected QCT Source. The files set grid includes the following columns:
Media files –names and paths to all files from the selected source
Test pre-set –selected test presets
Success % - files with test success of 100% can be played by AirBox.
Finish time –the time of test completion
TEST LOG
The Test Log at the bottom of the QCBox window displays a list of test statuses and results for all tested files. Each tested file is described with three
entries, on separate rows. The beginning row for each file is colored in blue. The test log also provides information about test start/end time, the name
and path for each media, applied test presets, etc.

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MENU BAR
The Menu bar includes the File, Settings, Tests and Help menus, each containing specific commands for the configuration and operation of QCBox. All
menus are described in detail further in this manual.
FILE MENU
Commands on the File menu include mode selection, file source settings and additional options for clearing QCBox on-screen logs. Each command is
described in details further in this section.
Auto mode
Click Auto mode to run QCBox in automated mode.
New QCT Source (Folder)
Click to select a folder (local or network) as a new source of media files for test. Matches the New QCT Source (Folder) icon on the toolbar.
New QCT Source (Playlist)
Click to select a playlist file as a new source of media files for test. The playlist should be in the native AirBox playlist format (*.ply). Matches the New
QCT Source (Playlist) icon on the toolbar.
New QCT Source (Set of files)
Click to select specific files for test from a location, containing multiple media files. Matches the New QCT Source (Set of files) icon on the toolbar.
New QCT Source (Text file)
Click to select a text file as a new source of media files for test. The media files and their paths should be listed as follows: “D:\AirBox
Samples\NTSC\Video\PlayBox.mpg” (including the quotes). Matches the New QCT Source (Text file) icon on the toolbar.
Clear logs
Click to clear the test logs at the bottom of the main QCBox window.
Clear Files Set and Logs
Click to clear all files for testing from the Files set list and all testing logs at the bottom of the main QCBox window.
Exit
Click to exit QCBox.
NOTE: Auto mode settings are defined from Settings > Auto mode. For more information about those settings, go to the Auto mode section further in
this manual.

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SETTINGS MENU
Commands on the Settings menu include general QCBox options, auto mode settings and options for adding/editing test presets. Each command is
described in details further in this section.
General
The General Settings configuration dialog contains the following sections:
Memory settings
To limit the number of entries, displayed in the test log at the bottom of the QCBox window, enable the Limited number of messages in the list
(recommended) option, and then specify the Maximum number of messages from the spin-box below.
File settings
To save the contents of the test log to a text file, enable the Log to file option. Specify the maximum size (in kilobytes) of the log file from the Log
file max size (KB) spin-box tot the right. The default log file size is 10 MB.
In the Output folder name field below, specify the folder to which log files should be saved. By default, QCBox log files are saved in
C:\ProgramData\PlayBox\QCT\LOGs.
Tests configuration path
In the Folder name field, specify the file path to the QCTTestConfig.xml. This is a configuration file for the tests, performed by QCBox. It contains
information about all test presets, available in QCBox. If you create a custom preset, information about it will also be written to that file.
NOTE: When the log file reaches the specified size, QCBox will start writing the log messages to a new file.

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Parallel processing
In the Number of tasks spin-box, select the number of tasks files which will be processed simultaneously by QCBox.
Simultaneous tasks and their status are displayed above the Test Log in the main QCBox window:
Auto restart
Under Auto restart, check the Enable auto-restart mode checkbox to allow automated application restart at a user-defined period of time. Select the
day of week, on which QCBox will be restarted from the drop-own list below. Specify the time of restart from the spin-box to the right.
Auto mode
This command opens the Auto Mode Settings dialog.
In the Media source field specify the path to the Auto mode config file.
The Scan period spin-box indicates by default that QCBox performs tests at predefined regular intervals of 30 seconds.
To Add/Edit a source directory for file verification, right-click somewhere in the Media source list area, and then click Add/Edit source.
NOTE: When in Auto-restart mode, QCBox will be restarted on the specified time and day every week, unless the settings are changed.
NOTE: Increasing the number of tasks results in higher CPU usage!

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You can add as many source directories as you would like to be automatically scanned. If you would like to temporary exclude a source for content
verification from the Media source list, just leave it unchecked (as in the example to the right).
After clicking Add/Edit source, the Add/Edit Auto Mode Settings dialog opens up.
From the Media source drop-down list, choose what type of source to be used for testing (a folder, playlist or a text file).
The Source folder type drop-down list appears only in case a Folder is specified for Media source.
If you would like QCBox to check also the subfolders situated in the source directory for checking, check the Include sub-folders check-box.
To assign a test preset to an existing Media source, select it from the Test pre-set drop-down list and click OK. A new row appears in the Auto Mode
Settings configuration dialog.
The Auto Remove Time Period field is situated to the bottom of the Auto Mode Settings dialog. By default it is set to 23 hours and 59 min. This option
compares the current time and date with the date of the last file verification performed. If more than 23 hours and 59 minutes have elapsed since the
last file verification, QCBox will remove all media sources which remained in the Media source list for a period longer than 23 hours and 59 min.
Test presets
This command opens the Tests Settings dialog. Here you can create or
modify Test presets. Each test preset acts like a template for
performing file verification: it contains a list of test plug-ins and a set of
parameters, defined for each plug-in. Each plug-in keeps track of
different Parameters. A set of Values may correspond to each
Parameter.
To Add/Delete/Delete All/Clone or Set as Default a Test
preset, right-click within the Test Presets area.
In the Default preset field you can see which test preset which is currently
set as default. It will appear automatically when you specify a source
directory for file verification.
After creating a Test Preset, select it by a single left-click over it. From
the All available plugins field to the right side of the window, select
each plug-in you would like to be used for performing the file
verification. Currently, we support several plugins (as in the example to
the right).
At the lower part of the screen, you can see separate Parameters as well as the Values, corresponding to them. They can be changed according to your
requirements and needs.
Once a test preset is defined and performed over a set of files, a metadata (*.mtd) file is sent to AirBox. Thus, if AirBox is properly configured for quality
control of its playlist files, it uses the abovementioned file and interprets the data in it in order to verify that the respective items have or have not passed
the quality check.
In the fields in the right part of the Tests Settings dialog you can configure some additional parameters.
The Allowed stream duration deviations field is used for comparing the file duration that is written in the metadata file with the playout duration. By
default, QCBox allows for ± 500 ms but you can enter different values here, in Shorter and Longer duration respectively.
Use the On Missing Stream(s) field to tell QCBox what to do when it cannot find one or more streams in a given file. Note that each file is
accompanied with a number of streams that it contains for audio and video compressions. Thus, the program checks for the presence of each of the
streams that are listed to exist within a file. If a stream is not found, QCBox allows you to do one of three things:
▪Return a result of 0 %
▪Return a result of 100 %
▪Check the existing streams and calculate the result by subtracting the respective portion of the file (stream(s)) that is / are missing
In the On Missing Media Info field you can tell QCBox how to act when media info is missing from a certain file. It can send a result of 0 or 100 %.
The calculation of the result (Success %) is described in details in the dedicated Appendix.
NOTE: The currently defined values are perfectly suitable for use in television quality control. Be aware that if you change these values we do NOT
guarantee appropriate results.

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Be aware that QCBox stores information for files that have already been checked with a certain Test preset. These files are recognized by their name and
QCBox verifies if the files checked are the same (i.e., the file is not a different one but with the same name) by checking its size in bytes. Thus, if for any
reason you are uncertain if the files that have already been checked correspond to the currently checked files, place a check in the Calculate CRC box
and QCBox will compare the size of the previously tested and the currently tested file. For more accurate results you can use the Force Calculation
box. However, you should note that this will slow down the quality check process.
Below you can see a list of the currently available test plugins, together with their description:
Loudness Measurements –Audio
The first plug-in is designed for performing Loudness Measurements. Its parameters are predefined in accordance to the EBU Technical
Recommendation R 128.You can choose between two algorithms for loudness measurement, available in our system - ItU R BS 1770-3(3) or ItU R BS
1770-1(1). Read more about loudness normalizing in the corresponding section below. You can also refer to the ITU (International Telecommunication
Union) website, http://www.itu.int/rec/R-REC-BS.1770/, to view more information about the algorithms.
Please, refer to the table below to view the user configurable parameters for this test preset:
Parameter name
Description
Choose standard to measure the loudness: ItU R BS 1770-
3(3) or ItU R BS 1770-1(1)
This is the standard (algorithm) used for loudness measurement. By default, the
value is set to 3, which stands for ItU R BS 1770-3(3). If you want to use ItU R BS
1770-1(1), please set the value to 1.
Max True Peak, dBFS
This is the maximum true peak value. By default, the value is 0. The parameter can
also be set to a negative number.
Zero Reference Level, dBFS
This is the reference loudness level. By default, its value is -23. It can take a value of
0 or negative values.
Deviation from Zero Reference Level correction
This parameter determines whether deviations from the Zero Reference Level
parameter should be allowed. It takes only two values, -1 and 0. By default, the
value here is set to 0, which means that deviations are not allowed. If you set the
value to -1, the check will be ignored.
The metadata file that is sent to AirBox looks like this:
<ProgrammeLoudness>floating point number</ProgrammeLoudness>
<LoudnessRange>floating point number</LoudnessRange>
<TruePeak Channel="0" Value="floating point number"/>
<TruePeak Channel="1" Value="floating point number"/>
...
<TruePeak Channel="N" Value="floating point number"/>
AirBox will use the received floating point number values and interpret them in accordance to the EBU Technical Recommendation R 128 target levels,
which are stated below.

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Missing Media Samples –Audio / Video
Color Frames Detection –Video
The second plug-in is intended for checking about Missing media
samples in the Audio and / or Video sources. It checks media sample times,
which must increase monotonically. The general idea of this test is to check
whether the respective audio / video samples overlap or if there is a gap
between them. QCBox performs this test with 100-nanosecond unit accuracy.
The parameters that you can define are described below:
This test checks the content of a video stream and reports the duration of the
frames with a predefined color. It is possible to set up to three different colors. The
parameters that you can configure are listed and described below:
Parameter name Description
Parameter name
Description
Allowed number of errors per MTI (-1 means unlimited)
This is the maximum number of error instances per Measurement Time Interval (see
below) which will pass the quality check
Maximum allowed time gap (x 100 ns)
This is the maximum time gap between two samples, measured in 100-
nanoseconds that will pass the quality check
Maximum error duration (ms) (-1 means unlimited)
This is the maximum duration of a separate error that will pass the quality check
Measurement time interval –MTI (ms)
This is the Measurement time interval that is used in the Allowed number of errors
per MTI parameter
Minimum allowed media sample duration (x 100 ns)
This is the minimum duration of a single media sample that will pass the quality
check
Total number of allowed errors (-1 means unlimited)
This is the maximum number of separate error instances that will pass the quality
check

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Color configured (0 –No)
If the value is not zero the test will check the content for this color, the color will
be skipped otherwise
Color (R,G,B or Y;U;V)
Color to be checked. Use ',' delimiter to specify RGB color or ';' delimiter to
specify YUV color
Color tolerance
The allowed deviation for each of the color coordinate (RGB or YUV)
Percent of pixels with given color (0.00 –100.00)
If the pixels of a frame exceed this percent the test decides the frame is colored
with the given color
Total number of allowed errors (-1 means unlimited)
The maximum number of errors allowed per stream
Measurement time interval - MTI (ms)
MTI (ms) - predefined time interval
Allowed number of errors per MTI (-1 means unlimited)
The maximum number of errors allowed per MTI
Fatal error duration (ms) (-1 means unlimited)
The minimum duration that is decided to be a 'fatal error'
Allowed color display duration (ms)
The minimum duration that is decided to be an 'error'
Frozen Frames Detection –Video
TESTS MENU
This test checks the content of a video stream and reports the duration of the
“frozen”frames. The parameters that you can configure are listed and described
below:
It contains two commands: Start and Stop - for starting or preventing the content verification process.
HELP MENU
Here is the “About” box of the QCBox module. It contains useful information such as: module version, WIBU Box number, mode, registration, etc.
Parameter name
Description
Threshold of the pixels distance (0 - 255)
The maximum distance between corresponding pixels in two frames
Percent of pixels below the given threshold (0.00 - 100.00)
If the pixels of a frame exceed the percent number, defined here, the quality
check will conclude that the frame is frozen
Total number of allowed errors (-1 means unlimited)
The maximum number of errors allowed per stream
Measurement time interval
MTI (ms) - predefined time interval
Allowed number of errors per MTI (-1 means unlimited)
The maximum number of errors allowed per MTI (defined in the parameter
above)
Fatal error duration (ms) (-1 means unlimited)
The minimum duration that is decided to be a 'fatal error'
Allowed frozen display duration (ms)
The minimum duration that is decided to be an 'error'

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AUDIO LEVELS NORMALIZING
This chapter explains in brief the necessity and methods of performing loudness normalization.
WHAT ACTUALLY HAPPENS IN AIRBOX WHEN NORMALIZING?
▪Performing a level shifting
AirBox does not process the source sound internally. It normalizes the loudness of the whole programme (file-based playout channel) by adjusting the
audio levels. For example, if there is a source file with average programme loudness of -32 dBFS, it will be increased with 9 dB in order to reach the
referent -23 dBFS specified in the AirBox output settings.
▪Keeping track of the maximum true peak level of the audio.
If the maximum true peak level exceeds zero dB, there will be a clipping introduced. If the maximum true peak level exceeds the specified value in the
AirBox output settings, AirBox assumes that the source content is not prepared in a good way by the sound engineer. In such case, AirBox will not
reproduce the relevant media source.
Let us follow the latter example with the source file having average programme loudness of -32 dBFS. If the maximum true peak level of this file is -8
dB, increased with 9 dB the peak will jump to 1 dB (above zero). Exceeding the zero will cause clipping. And exceeding the maximum permitted value
(by recommendation: -1 dB) will cause skipping the playback of such source.
PLAYBOX WORKFLOW
▪Loading playlist
▪Reading the *.MTD file, created by the QCBox tool for reference
▪Reading the relevant audio metadata values, described into it
▪Based on the loudness metadata, AirBox performs a correction of the audio in order to reach the referent –23 LUFS (-24 LUFS for US). The
value is configurable through the output settings.
OVERVIEW
The normalizing functionality is developed in accordance with EBU Technical Recommendation R 128. It
is designed to benefit our clients with the intention of:
▪Performing monitoring and control over the perceived loudness of audio sources.
▪Reducing loudness differences between programmes. This is applicable when the nature and content
of the audio material(s) changes frequently. For example, such problem most commonly occurs at the
breaks for advertising: there is a jump between audio levels.
Loudness jumps between broadcast channels and between programmes within the same channel are
frequent source of audience complaints. Using the normalizing functionality, the audio levels between
separate programmes will be equalized. EBU Rec. R 128 is based on ITU-R BS.1770 and defines a new
way of metering and normalizing audio. It also recommends some of the following standards:
▪ “The Programme Loudness Level shall be normalized to a Target Level of -23 LUFS. The permitted
deviation from the Target Level shall generally not exceed ±1 LU for programmes where an exact
normalization to Target Level is not achievable practically (for example, live programmes)” –EBU Rec.
R 128
▪“The Maximum Permitted True Peak Level of a programme during production shall be -1 dBTP (dB True
Peak)” - EBU Rec. R 128
According to EBU Tech3343, there are two ways to achieve loudness normalization for the consumer:
▪The first one is concerning a normalization of the source itself, so that the programmes will be
“equally loud by design”.

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▪The second method is related to the use of loudness metadata that describes how loud a programme is. In such case the average programme
loudness levels don’t need to be changed to a normalized value.
HOW TO APPLY THE NECESSARY SETTINGS?
Adjusting QCBox
QCBox is a quality control tool intended to guarantee the successful playout of AirBox media files. QCBox is checking sets of files, playlists or separate
directories. Performing content verification can be loudness-related as well as concerning missing audio or video media samples. It stores quality data
descriptions into a .*MTD file, corresponding to each media file checked. AirBox will play or skip a clip depending on the quality data and the user-
defined actions.
✓Launch QCBox
✓Go to Settings menu Test presets.
✓A new configuration dialog opens up
✓To Add, Delete or Set as default a new test preset, right-click within the Test presets field.
✓Then choose the proper plug-in for tests performing out of the right-hand side of the dialog.
If Loudness measurements is selected, QCBox will store a loudness metadata into an *.MTD file, corresponding to each tested media file. You can see
an example of such *.MTD file opened on the right part of the screen. There is a “Programme loudness” value of -14.0 (underlined). This value
represents the average loudness of a programme (playlist media file).
NOTE: AirBox does not process the audio by applying a permanent modification (compression, peak limits, EQ) of the source content. It just changes
the audio during playout by adjusting audio levels.

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Based on this value, AirBox will perform a correction of the audio levels. For example, if the average loudness of a programme is -14.0 dB, AirBox will
make it lower with 9 dB in order to reach the referent -23 dBFS. The correction of -9 dB for the relevant programme (playlist clip) is visible to the playlist
clip properties: right-click the clip inside the playlist PropertiesMetadata tab (see the example to the left). Such correction is different depending
on each programme (playlist clip).
Let’s get back to QCBox.
✓Go to the File menu or use the Toolbar to define a QCT source for testing. The Source can be an entire folder or set of files, an AirBox playlist (*.ply
file) or a text file.
preset that you would like to use.
✓Into the newly opened dialog, browse the source for testing.
✓From the Test preset drop-down list, choose a previously created test
✓Click OK. All media files inside the specified directory will be listed into the Files set field. It occupies the main part of the interface.
✓Then go to the Tests drop-down menu and click Start (you can also use the relevant button situated in the Toolbar).
QCBox will start to perform tests of the media content, storing the test results as a metadata to an *.MTD file corresponding to each media file tested.
Adjusting AirBox
✓Go to AirBox Settings menu Output
✓Select the Audio (General) tab
✓In the Normalization field, check Enabled
✓A value of -23 dBFS is corresponding to the Referent Zero Level (by default). This is a target level by
which the programme loudness level should be normalized in accordance with EBU rec. R 128. There is a
tolerance of ±1.0 LU existing for programmes where an exact normalization is not achievable practically.
✓To the Max True Peak dBFS string you should indicate the maximum permitted TPL. According to EBU
R 128 it is -1dBTP (measured with a True Peak meter)

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APPENDIX –Formula for Success (%) in QCBox
Success in %, as displayed in the image below, is equal to the Result from the GeneralMediaInfo tag from the *.mtd file. For reference, please, check the
example *.mtd file, displayed below.
The Result from the GeneralMediaInfo tag is a multiplication of the Result from the MediaInfoCheck tag (it is a common test) by the Result from test
tags (this is the results from the selected preset).
For example,
If you refer to the attached screen shot and metadata file, then the Success (%) is calculated as follows:
Success(%)=Result[GeneralMediaInfo]=Result[MediaInfoCheck]*Resultn[Testn]
16.20%=16.20%[GeneralMediaInfo]=100%[MediaInfoCheck]*100%[Test:Missing media samples, audio]*100%[Test:Missing media
samples,video]*100%[Test:Color frames detection]*16.20%[Test:Frozen frames detection]

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SAMPLE METADATA FILE
<?xml version="1.0" encoding="UTF-8" ?>
-<MediaMetadata>
-<GeneralMediaInfo>
<Size>1911961088</Size>
<DateModified>13.06.2013/13:37:09.684</DateModified>
<PartCheckSum>E6670C9A</PartCheckSum>
<FullCheckSum>157C6A2C</FullCheckSum>
<Checked>true</Checked>
<CheckerVersion>1.0</CheckerVersion>
<Result>16.20</Result>
<MinResult>16.20</MinResult>
<Timestamp>18.10.2013/14:29:52.959</Timestamp>
</GeneralMediaInfo>
-<Tests>
-<CommonTests>
-<MediaInfoCheck>
<Timestamp>18.10.2013/14:29:52.918</Timestamp>
<Result>100.00</Result>
</MediaInfoCheck>
</CommonTests>
- <Test>
<Id>{D7D0EC7C-1433-4253-AF83-A520520B641C}</Id>
<Instance>1</Instance>
<Name>Missing media samples</Name>
<MajorMediaType>{73647561-0000-0010-8000-00AA00389B71}</MajorMediaType>
<MajorMediaTypeName>Audio</MajorMediaTypeName>
<TestVersion>1.0</TestVersion>
<Timestamp>18.10.2013/14:29:47.296</Timestamp>
<Weight>1</Weight>
<Result>100.00</Result>
- <TestRunParameters>
<RunParam Name="Minimum allowed media sample duration (x 100 ns)" Value="209" />
<RunParam Name="Total number of allowed errors (-1 means unlimited)" Value="10" />
<RunParam Name="Maximum allowed time gap (x 100 ns)" Value="166666" />
<RunParam Name="Maximum error duration (ms) (-1 means unlimited)" Value="100" />
<RunParam Name="Allowed number of errors per MTI (-1 means unlimited)" Value="10" />
<RunParam Name="Measurment time interval - MTI (ms)" Value="5000" />
</TestRunParameters>
</Test>
- <Test>