za dtt user interface+specification 1+0

8/12/2019 ZA DTT User Interface+Specification 1+0

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DTT User Interface Specification

Document Description:A STB User Interface specification issued by e.tv Pty (Ltd) (e.tv) and the South African BroadcastingCorporation Pty Ltd (SABC) on behalf of the South African terrestrial free-to-air broadcasters as per the requirements of SANS862.

Author Aaron Blanchard

Date October 2013

Version 1.0

Distribution Confidential


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Terms of use:

I. The DTT User Interface Specification is limited in use to South Africa only.II. The DTT User Interface Specification is limited to use on the DTT platform only.

III. The DTT User Interface Specification may not be modified in any manner whatsoever, without the prior written permission of both e.tvand the SABC.

IV. Any unauthorized reproducing, publishing, broadcasting, diffusion and/or making any adaptation of the DTT User Interface Specificationis unlawful; and expressly prohibited.

V. e.tv and the SABC offer no warranties and accept no liability, including but not limited to any liabilities in relation to Intellectual PropertyRights infringement, arising from the implementation of the DTT User Interface Specification and the use thereof by any users of theDTT STB User Interface. In particular and without limiting the generality of the foregoing, to the extent that an existing or underlyingcopyright may in future be asserted in relation to the DTT User Interface Specification or any user interface arising from the use of theDTT User Interface Specification, either inside or outside South Africa, it is the sole responsibility of implementers of the DTT UserInterface Specification to ensure they have all necessary licences, permissions, clearances and authorisations in relation to anyapplicable Intellectual Property Rights.


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ContentsDocument Control ................................................................................ ................................................................................ ........................................ 4

References ............................................................................... ................................................................................. .................................................... 4

Definitions.................................................................................................................................................................................................................... 5

1. Introduction ..................................................................... ................................................................................. .................................................... 62. Launch Applications .................................................................... ................................................................................. ....................................... 7

3. On-screen display requirements ............................................................................. ................................................................................. ............. 8

4. General interaction ....................................................................... ................................................................................. ..................................... 10

5. Receiver response ............................................................................................................................................ .................................................. 11

6. Remote Control ............................................................................ ................................................................................. ..................................... 12

7. Installation.......................................................................................................................................................................................................... 13

7.1 Installation/TV Format............................................................................................................................................................................... 13

7.2 Installation/Service Search ............................................................................. ................................................................................. ........... 14

7.3 Installation/Scan ................................................................... ................................................................................. ..................................... 15

7.4 Installation/Services Found ............................................................................ ................................................................................. ........... 16

7.5 Installation/No Signal Found ................................................................................................................................ ..................................... 178. Main Menu ...................................................................... ................................................................................. .................................................. 18

8.1 Main Menu/Guide .............................................................................. ................................................................................. ....................... 19

8.2 Main Menu/TV .......................................................................................................................................................................................... 19

8.3 Main Menu/Radio .............................................................................. ................................................................................. ....................... 19

8.4 Main Menu/Settings ........................................................................... ............................................................................... ......................... 20

8.4.1 Main Menu/Settings/Channel Scanning ................................................................................................................................................ 21

8.4.2 Main Menu/Settings/TV Settings .......................................................................................................................................................... 22

8.4.3 Main Menu/Settings/Parental Control .......................................................................................................................... ......................... 23

8.4.4 Main Menu/Settings/General ..................................................................... ................................................................................. ........... 25

8.4.5 Main Menu/Settings/Languages ................................................................................................................................... ......................... 26

8.5 Main Menu/System Information .................................................................... ................................................................................. ........... 279. On Screen Control.............................................................................................................................................................................................. 28

9.1 Audio Language, Subtitle and AD Selection .................................................................................................................................. ........... 28

9.2 Reminder .............................................................................. ................................................................................. ..................................... 29

9.3 Direct Digit Entry ...................................................................................................................... ................................................................ 30

9.4 Radio Services ........................................................................................................................................................................................... 31

9.5 Error banners ........................................................................ ................................................................................. ..................................... 31


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Definitions

AD - Audio Descriptor

BCH - Bose Chaudhuri Hoequenghem Code, the DVB-T2 error correction code

BER Bit Error Rate CRTCathode Ray Tube

C/N Carrier-to- Noise ratio

CRT Cathode Ray Tube

FSA- File System Acceleration

FTA Free To Air

LCN Logical Channel Number, which is the number that will be displayed and associated with a particular service or programme

MHEG MHEG-5 interactive middleware whose applications are available OTA

OTA - Over the Air

PLP - Physical Layer Pipe

RCU Remote Control Unit

RF Radio Frequency

SQI Signal Quality Indicator: A relative value within a range of 0 to 100%, with a resolution of 1% and updated once a second. This

value should be referred to a PLP in the received signal at the RF signal input and its combination of C/N and BER before BCH

where the signal quality is weighted by the receiver C/N e.g. PLP without bit error before BCH should be weighted with C/N.

SSI Signal Strength Indicator: A relative value within a range of 0 to 100%, with a resolution of 1% and updated once a second. The

absolute accuracy shall be 5dB at RF input levels -80dBm to -60dBm and 7dB for RF signals larger than -60dBm. The relative

accuracy should be between 3dB between centre frequencies within one frequency band e.g. VHF band III or UHF band IV/V,

supported by the receiver.

STB Set Top Box

UHF Ultra High Frequency

UI User Interface

VHF Very High Frequency


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1. Introduction

The STBs that operate on the South African Digital Terrestrial network shall contain two types of software that provides the software

functionality of the STB. The first type of software is the MHEG application/s which will be delivered by the FTA broadcasters. The second type

of software is the embedded native code, implemented by STB manufacturers, that supports the STB functionality as well as provides some of

the user interface screens. This specification outlines the basic functional requirements for the native user interface (Native UI) screens that

are embedded in the STB and is to be read in conjunction with the Set Top Box specification SANS 862.

Areas of native code functionality that pertain to key support services (such as call centre) have been prescribed as mandatory. Menu and

submenu structures, menu item numbers and dedicated keys as defined in this document are all mandatory requirements. STB manufacturers

are able to exercise their own options in terms of the following items:

Screen colours

Graphics design

Support additional STB features

Include menu options in addition to those prescribed in this document.

Screen examples containing the minimum menus structures have been provided for explanatory purposes but are not prescriptive in terms of

colours and graphic design.

Certain of the user interface functions and screens will be provided by the MHEG Guide applications. These applications will be broadcast by

means of MHEG data carousels by the broadcasters and will be stored in the STB flash memory. The Guide applications will therefore mostly

be accessed by means of the MHEG File System Acceleration from the STB flash memory to provide a quick access time. These applications

may be updated from time to time at the FTA broadcasters discretion and therefore the STB manufacturer has no control over these aspects

of the STB operation. The minimum set of Guide Applications and supporting documentation shall be supplied to STB vendors to be

incorporated into their STBs prior to manufacture.

The Guide applications include the following key functions and screens:

1. Electronic Programme Guide (EPG) which is a full seven day programme guide using EIT based data

2. Now/Next banner(also known as the channel change banner, or small/large information screens) which provides programme

information on the Now channel selected as well as the Next event on that channel

3. Channel Listwhich provides a list of available channels ( Radio and TV )


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2. Launch Applications

The Launch Applications provide the user with all programme related information and therefore needs to be always accessible to the user. To

achieve this functionality with an MHEG application, the STB shall be able to run the Launch Applications directly from the File System

Acceleration ( FSA ) cache without having to follow the boot process described in section 9.3 ( the PMT and Service Gateway signalling

extension) of the MHEG specification. This implies that the Launch Applications will not need to be signalled in the PMT and therefore the

Launch Applications shall be able to display even if no PMT is present.

Requirement 2.1 Whenever the embedded native code is requested to display a Launch Application, the following procedure shall be

followed:

1. If another MHEG application is running, it shall first be terminated.

2. If the Launch Application has not yet been loaded into the FSA, the application shall down first download into the FSA cache. An

example of this is after a factory reset has been initiated. The time for the Launch Application to display is determined by the broadcast

system play out rate of the application.

3. If the Launch Application is resident in the FSA, the STB shall launch the requested Launch Application (from cache as described above)

using the corresponding URL as shown in the table below.

Launch application URI

Electronic Program Guide DSM://navigator/epg

Now/Next Banner DSM://navigator/info

Channel List DSM://navigator/slist

The time for the Launch Application to display shall be less than 1s.

Requirement 2.2 The embedded native code and its associated User Interface shall not display any programme related information that

performs the functions of, or replicates, an embedded EPG, now/next banner or in service channel list. The Native UI shall not cause contention

or conflicts with the functions provided by the Launch Applications.


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3. On-screen display requirements

Requirement 3.1 The native UI screens must be designed for use on 4:3 CRT Televisions taking into account best practice with regards to

safe areas. Downscaling may be used, but not at the expense of screen clarity. If a native 720x576 resolution screen looks better then it shall

be used. If a 16:9 screen is configured or detected (e.g. an HDMI display is connected) then a higher resolution screen that covers the entire

video plane may be used.

Requirement 3.2 The Tiresias screen font shall be used as it has been designed for legibility on a television. If need be, an Anti-aliased

version of it scales very well to different resolutions. The Tiresias font will also be used on the MHEG application screens thereby ensuring a

similar look and feel when moving from native to MHEG screens. Mixed case letters shall be used. Oblique, italic, underlined and condensed

fonts are not acceptable.

Requirement 3.3 The UI should be designed using the principles of good web design practice (Reading through the W3C guidelines at

http://www.w3.org/is recommended) especially when moving around menus where the use of clear and understandable menu terminology

shall be used as well as the current menu option being highlighted clearly.

Requirement 3.4 Items that are mandatory in the menus shall be numbered and directly selectable using numeric keys. This aids any call

centre trying to provide telephonic assistance.

Requirement 3.5 An unambiguous correspondence between the on-screen prompts and labels on the remote control shall be used.

Requirement 3.6 Text, relevant symbols and icons shall be displayed with good contrast taking into account that the UI needs to be readily

viewable on a monochrome screen avoiding the ambiguity that could arise by using similar colours. Combinations of red and green as well as

pure red and white combinations should be avoided.

Requirement 3.7 Only Arabic numbers shall be used (1, 2, 3)and symbols and icons should assent to internationally recognised

standards.

Requirement 3.8 Left-aligned text shall be used rather than centred or right-aligned. Justified text for paragraphs should be avoided.
http://www.w3.org/http://www.w3.org/http://www.w3.org/


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Requirement 3.9 The display of signal strength indicator (SSI) and signal quality indicator (SQI) as defined, shall include an on screen

display or bar that is colour coded to indicate signal conditions that are within tolerance, marginal and out of tolerance. The display shall

always be supported by a text description that indicates that the signal is:

- Ok and green if signal level is acceptable

- Weak and amber if signal level is marginal

- Poor and red if signal level is unacceptable


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4. General interaction

Requirement 4.1 Certain RCU keys have global and uniquely assigned functionality in the native embedded code and applications. That is,

the designated function shall occur irrespective of which screen or menu the user is using. These keys are:

- Power, Exit

Requirement 4.2 In addition, there are further keys that will perform a unique designated function in all native embedded code these

keys are not to be used as soft keys for a secondary function. These keys are:

- Vol+, Vol-,CH+,CH-,Info, EPG, Menu, Back, Mute

Requirement 4.3 The UI shall provide a direct way of returning to the previous user menu through the use of a back button.

Requirement 4.4 The exit button will always result in the exit of any application or UI and reverts to the previously selected service.


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5. Receiver response

The UI shall provide direct and clear feedback for any action initiated by a user (e.g. selecting a highlighted option or moving through options

in a menu etc.)

If any user initiated action results in a noticeable delay then the receiver shall provide suitable feedback to assure the user that the action has

been accepted.

Requirement 5.1 If it is a short delay (longer than 3s but less than 10s ) then a simple message such as Please Wait or something more

appropriate to the action should be displayed.

Requirement 5.2 If it is a long delay (more than 10s) then more detail is required; such as by providing a progress bar or other visual

indication to indicate when the STB may finish the requested action.


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6. Remote Control

Requirement 6.1 The operation of the following screens is

based upon a remote control with the keys in the table opposite.

Requirement 6.2 On Screen displays shall be provided for

Vol+/Vol- and Mute except when an MHEG application is on screen

Requirement 6.3 TV/Radio shall switch the box between TV

and Radio Mode. The previously listened to or watched Radio or

TV service shall be changed to and the MHEG based Now/Next

banner shall be displayed.

Requirement 6.4 Only TV or Radio services in each mode can

be cycled through using CH+/CH-. In addition, only the selectedmode services are viewable in the Now/Next Banner and

Channel List.

Requirement 6.5 Data or interactive services which are

configured as channels are to be visible in TV mode;

Requirement 6.6 Pressing the Interactive key which will take

the user to an MHEG based landing page which will then allow

access to the MHEG based interactive and data services.

Requirement 6.7 The coloured buttons shall not be assigned

any function by the embedded code. These buttons shall launch

any in channel MHEG application and shall only be assigned a

function by the current selected MHEG application.

Remote Control Key Usage

Power Places STB into Standby

Mute STB Audio Mute

Vol+ STB Audio Volume Up

Vol- STB Audio Volume Down

EPG Change menu to the MHEG based EPG

Info Change menu to the MHEG based Now/Next

CH+ Change Service Up

CH- Change Service Down

Menu Change menu to Main Menu

Exit Exits the screen

OK Validates the highlighted item

Left Selects the left item

Right Selects the right itemUp Selects the above item

Down Selects the below item

0-9 Digit Entry

Back Go back to the previous menu unless not on a menu

Red Red options on applications

Green Green options on applications

Yellow Yellow options on applications

Blue Blue options on applications

Subtitles Subtitle Selection for current programme

Audio Audio Language Selection for current programmeTV/Radio Switch between TV and Radio modes

Interactive Change menu to the MHEG based Interactive

Landing Page

AD Audio Descriptor for current programme


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7.2 Installation/Service Search

Requirement 7.2.1 There shall be two options available upon

installation for adding services to the STB; automatic and manual.

The default selection is automatic which results in a full scan of

all channels (as defined in the SANS862 DTT receiver specification).A manual search may be performed by entering a channel number.

Requirement 7.2.2 All the scan options shall be on one screen.

The text Ensure your TV aerial is connected must be included.

The Automatic search shall be invoked by one button press, that

is, the OKbutton

Example screen:

Requirement 7.2.3 Remote Control Key Usage


0-9 Select the channel number that is to be scanned

OK Start an automatic scan

Up Move up through the options

Down Move down through the options

Exit Exit the menu. Note that no channels will have been

stored but does allow access to the main menu.

In this example, if the channel number is invalid, a scan will not be

performed and the digits cleared to _ _.


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7.3 Installation/Scan

Requirement 7.3.1 After a channel number is entered a scan of a

single channel shall be performed.

Requirement 7.3.2 If a full scan is requested, a scan of all of thechannels as defined in SANS 862 shall be performed.

Requirement 7.3.3 Whilst scanning, an indication of the current

channel number being scanned, the total services found so far, the

current network ID and the current network name shall be

displayed.

Indications of the current signal strength (SSI) and quality (SQI) as

well as the progress through the scan shall be displayed.

Example screen:






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7.4 Installation/Services Found

Requirement 7.4.1 For a successful automatic successful scan,

display the results of the scan and the signal strength indicator (SSI)

for the lowest LCN. For a successful manual scan the SSI for the

scanned channel shall be displayed.

A summary of the type of services ( TV, Radio, Data) found shall be

displayed as well as the channel number for the lowest LCN, or in

the case of a manual scan the scannned channel number.

Example screen:



OK Exits the screen and tune to service 0 if available,

otherwise the next lowest LCN. The MHEG based

Now/NextBanner shall automatically display.

Exit Exits the screen and tune to service 0 if available,

otherwise the next lowest LCN. The MHEG based

Now/Next Banner shall automatically display.


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7.5 Installation/No Signal Found

Requirement 7.5.1 A help screen should be displayed after no

services have been found on a channel scan.

Example Screen:



OK Change to the Installation/Service Search screen




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8.1 Main Menu/Guide

Requirement 8.1.1 After selecting this option, the MHEG based

Electronic Programme Guide shall be displayed.

8.2 Main Menu/TV

Requirement 8.2.1 TV option. The selection of this option puts

the STB into a TV Mode that limits the selection of services so that

all services that are configured as TV channels will be displayed as

available. This applies to all the Native UI service selection

mechanisms, which includes CH+/CH- and Direct Digit Entry, as well

as the MHEG Channel List and Banner applications.

Requirement 8.2.2 After selecting this option, the STB shalldisplay either the TV channel with the lowest LCN or the last TV

channel viewed.

Requirement 8.2.3 The TV/Radio key toggles between these two

modes. The Banner application shall display after switching mode.

8.3 Main Menu/Radio

Requirement 8.3.1 Radio option. The selection of this option

puts the STB into a Radio Mode that limits the selection of servicesso that only Radio services will be displayed as available. This

applies to all Native UI service selection mechanisms, which

includes CH+/CH- and Direct Digit Entry, as well as the MHEG

Channel List and Banner applications.

Requirement 8.3.2 After selecting this option, the MHEG based

Channel List shall be displayed showing radio Services.

Requirement 8.3.3 The TV/Radio key also toggles between these

modes but doesnt bring up the Channel List display. See the

remote control section.


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8.4 Main Menu/Settings

Requirement 8.4.0.1 This page displays the STB settings. The text

and the order of the following menu items is mandatory, as is the

inclusion of the numbers:

1. Channel Scanning

2. TV Settings

3. Parental Control

4. General

5. Languages

Additional options may be added after 5. Languages.

Example screen:

Requirement 8.4.0.2 Remote Control Key Usage


EPG No Action

OK Select currently highlighted option

Up Move highlight up

Down Move highlight down

Left If focus is on the right side, then move back to the left

side

Right Select currently highlighted option

Back Returns to Main Menu




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8.4.1 Main Menu/Settings/Channel Scanning

Rescan the channels available to the STB.

Channel scanning shall cover the complete range of frequencies asgiven in SANS 862

Requirement 8.4.1.1 The following three options shall be

available, the text in inverted commas is mandatory:

a) Rescan and Add: a rescan of the required frequency range to

locate and add new or changed services;

b) Delete and Rescan: the deletion of all stored settings and

subsequent scan and storage of new ones; and

c) Manual: the scan of a single multiplex (manual search: entry of

the channel number to be searched). The Manual mode is a scan

and add function unless the services found are the same as those

already listed in the STB memory.

Requirement 8.4.1.2 During all scanning operations, the STB shall

provide an indication of progress by displaying the number of the

channel currently being scanned and the number of services

located on a single screen. Where a multiplex is encountered, the

decoder shall display details of its name and network identification,

together with the signal strength (SSI) and quality (SQI).

Requirement 8.4.1.3 Where more than one multiplex is found to

contain the same services, the STB shall prioritize the multiplex that

has the best signal strength and quality. The STB shall ensure that

there is no duplication of LCNsin the channel list.


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8.4.2 Main Menu/Settings/TV Settings

The list of settings required to configure the STB for TV dependant

Settings.

Requirement 8.4.2.1 TV Settings

The following four TV settings are mandatory:

1. Screen aspect ratiowith 16:9 and 4:3 selectable options.

Other options may be included, for example: 4:3 Centre Cut

Out, 4:3 Letterbox etc.

2. Audio Descriptor Volumewith On/Off selectable options

Other options may be included, for example: Volume offset,

mono/stereo

3. Remodulator Frequencywith selectable channels from

channel 21 to 69

4. Now/Next Banner timeout.

This setting defines the display period for the

now/next banner Launch Application

Mandatory: The factory default setting must be

greater or equal to 5s.

Example options: 5s, 8s, 10s

The following additional TV settings are suggested along with

example options:

5. HDMI Video (576p, 720p, 1080i, 1080p)

6. HDMI Audio (Mono/Stereo/Dolby Digital)

7. HDMI Audio Delay


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8.4.3 Main Menu/Settings/Parental Control

Parental control parameters support the operation of parental

control. This includes the setting and resetting of PINs for both

content access and access to the parental control settings, the

activation of the parental control mode, and the setting of the age

threshold.

8.4.3.1 Operation

Requirement 8.4.3.1.1 It shall be possible to apply parental

control on individual events and complete channels. Parental

control for individual channels shall be implemented as part of the

channel store and preferences function.

Requirement 8.4.3.1.2 The parental control function for an

event or channel shall be controlled by the parental rating

contained in the EPG (SI, EIT information). The STB decoder shall

suppress both video and audio if the parental rating is above the

configuration threshold for the event. Unblocking of a parentally

blocked event shall be done through the entering of a parental PIN.

Once the event has been unblocked, it shall remain unblocked for

the duration of the event. A change away from the channel and

back again shall not require PIN re-entry within the timescale of

that event.

When a higher rating is applied to an unblocked event, the

unblocked event shall be blocked and the user will be required to

re-enter the parental PIN.

Checking of parental control status and subsequent content

suppression, if appropriate, shall apply across all state transitions,

for example, at switch-on, at coming out of standby, and at channel

changes and event boundaries.

Requirement 8.4.3.1.3 The parental control PIN shall be reset

by performing a reset to factory settings.

Requirement 8.4.3.1.4 The factory default setting shall beparental control disabled.

8.4.3.2 On-screen messages

Requirement 8.4.3.2.1 If the user has enabled parental

control and the rating of the current event is above the trigger

level, the STB decoder shall request the entry of a four-digit

parental control PIN before allowing access to the event.

Requirement 8.4.3.2.2 If an incorrect PIN is entered, thedecoder shall generate an error message and request re-entry.

Requirement 8.4.3.2.3 After five incorrect attempts, the

decoder shall advise the user that no further attempts can be made

for a period of 10 min.

During this period, it shall be possible to select other services, put

the decoder into standby, etc. However, these actions shall not

reset the timer, and the error message shall be displayed whenever

the user returns to that event.


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8.4.3.3 Configuration

Requirement 8.4.3.3.1 The menu structure shall include

provision for the user configuration of parental control settings,

including the resetting of the PIN sequence, changing the PIN

sequence, and setting the minimum-age trigger level as per PG

level rating defined in table 1.

Requirement 8.4.3.3.2 Events higher than the parental rating

selected by the user shall be blocked for viewing and only viewing

of content with a lower rating shall be allowed. In the absence of a

parental rating for an event, all content shall be parentally blocked.

Requirement 8.4.3.3.3 The factory default setting shall be

parental control disabled.

Table 1 Parental control ratings for South Africa

1 2

DVB Parental Value

carried in EIT

Parental Rating on

Viewers Decoder

Display

0 ALL

2 PG-10

3 10

6 PG-13

7 13

10 16

13 18

15 R-18


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8.4.4 Main Menu/Settings/General

General covers any other options that dont fit under the

previous headings.

Requirement 8.4.4. The following options are mandatory:

1. Software Updates

2. Factory Reset

3. Aerial Power

8.4.4.1 Software Updates

Requirement 8.4.4.1 A software update function shall be

provided that allows software updates in two ways:

Automatic where the STB will perform an update as

scheduled by the broadcaster. The STB will therefore

automatically load the update software as soon as it is

broadcast.

Manual where the STB shall perform an update

initiated by the user. In this mode the UI must provide

an indication to the user if the update is not available

and if the update process has been successfully

completed.

8.4.4.2 Factory reset

Requirement 8.4.4.2.1 The STB shall include the provision for

restoring the factory default settings in response to a user

instruction.

This shall return the STB to the same state (locally stored data and

settings) in which it left the factory. The Launch Applications shall

be erased from the accelerated file system during a factory reset.

Requirement 8.4.4.2.2 The factory reset function shall also

be triggered by a simultaneous pressing of the two channel change

buttons on the STB front panel, i.e. without the need for an RCU.

8.4.4.3 Aerial Power

Requirement 8.4.4.3 This allows the user to enable or disable

power to an active aerial. See SANS 862:2012 section 4.11 Power

Supply for further operational information.


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8.4.5Main Menu/Settings/Languages

Requirement 8.4.5.1 Preferred Audio Language. A menu or setting

must be provided to allow for the selection of the default Audio

language choice. The factory default setting must be English.

Example options: 11 official SA languages

Requirement 8.4.5.2 Preferred Subtitle Language

A menu or setting must be provided to allow for the selection of

the preferred Subtitle language choice. The factory default setting

must be English.

Requirement 8.4.5.3 Preferred AD Language

A menu or setting must be provided to allow for the selection of

the preferred AD language choice. The factory default setting must

be English.

Requirement 8.4.5.4 Language display

All the languages provided in the EIT must be listed as available for

the selection of Audio, Subtitle and AD languages

Requirement 8.4.5.5 Although the underlying layers use ISO 639

codes to identify the language they should be presented in a

human readable form. The same setting may be used to select the

preferred AD and subtitling languages


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8.5 Main Menu/System Information

Requirement 8.5.1 Display information about the STB. This

easily accessible, single page will aid a call centre when providing

information about the STB. The following items are mandatory on

one screen:

- STB hardware model number or name

- Software version number

- Serial number

- Current channel number

- Tuner Lock ( Ok or Not Locked )

- Signal strength (SSI)

- Signal Quality (SQI)

Example Screen:



EPG No Action



Back Move to the previous screen

Right If available move to the next information screen

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9. On Screen Control

This section addresses functionality required whilst on screen,

that is, viewing services.

9.1 Audio Language, Subtitle and AD Selection

Example: subtitle selection:

Requirement 9.1.1 A menu must be provided to allow selection

of languages for Audio, Subtitling and AD services being broadcast

for the current programme (LCN). The relevant menu shall be

invoked by using the Audio, AD, and Subtitle keys. Selection

of a language will override the default language (as set in the

Default Audio Language option) for the current programme (LCN).



Exit Exits the form

EPG Change menu to EPG


Subtitle,

AD,

Audio

Whichever key was used to open the menu will also

close the menu with no changes.

Up Move highlight upDown Move highlight down

OK Select the chosen Language

Requirement 9.1.3 After changing from the current programme

(LCN) to a different programme (LCN), the STB will revert to the

default language setting.

Requirement 9.1.4 If the default language is not available for a

selected programme (LCN), then the STB shall default to the firstlanguage available in the broadcast tables.

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9.2 Reminder

Requirement 9.2.1 Reminders can be set through the MHEG

resident applications EPG and the Now/Next banner.

Requirement 9.2.2 If a reminder has been set and the

programme is due to start then a warning should be displayed:

example:



EPG Change menu to EPG and ignores the reminder

Menu Change menu to Main Menu and ignores the

reminder

OK Change to the service that the programme is onBack Ignore the reminder and exit the screen

Exit Ignore the reminder and exit the screen

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9.3 Direct Digit Entry

Requirement 9.3.1 If 0-9 are pressed without any Native menus

on the screen or depending on which level of MHEG key register

group is active, then the Direct Digit Entry shall be started.

This allows the user to directly go to a known LCN. A 3 digit entry is

required.

Example screen:



0-9 Enter the service number to change to and change to itafter 3 digits have been entered

OK Change to the service that is currently entered if less

than three digits have been entered

Exit Ignore the entry and exits the screen

Requirement 9.3.3 If an LCN is entered for a TV service whilst

the STB is in Radio Mode then the STB shall ignore this instruction

and present a banner indicating Invalid channel entry. Likewise

for an LCN that is entered for a Radio service whilst the STB is in TVMode.

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9.4 Radio Services

Requirement 9.4.1 Radio services shall also use the MHEG

resident application Now/Next banner.

If the MHEG application chooses to continue with an MHEG screen

saver, then the application dictates the screen display. As an

option, if the MHEG Now and Next banner times out, and the Event

Information is not blank, then a native screen saver (with a moving

object) shall be displayed within 1min of acquiring the service.

9.5 Error banners

The following error banners are mandatory:

No signal

Service unavailable

Unauthorised service

No information available

Additional error banners may be provided.

Requirement 9.5.1 No signal

If, during normal operation (that is, excluding an installation

process), the level and quality of the channel that the STB is tuned

to becomes unacceptable, a banner must be displayed indicating a

No Signal condition. In addition, the banner should indicate the

LCN and service name of the selected service or last service viewed.

Requirement 9.5.2 Service unavailable

If a service is selected that has a valid service ID and has been

allocated an LCN but the SI data is corrupted or missing and does

not allow presentation of the service, a banner with the text

Service not available must be displayed. The banner should also

indicate the LCN and name of the selected service.

Requirement 9.5.3 Unauthorised service

If a service is selected that is encrypted in a manner not

decipherable by the STB (such as a pay tv service), a banner with

the text Service Unauthorised must be displayed.The banner

should also indicate the LCN and name of the selected service.

Requirement 9.5.4 No Information available

If any service is selected, and for any reason the EIT information isnot yet available to the STB, a banner with the text No Information

Available must be displayed. The banner should also indicate the

LCN and name of the selected service.

Requirement 9.5.5 No contention with Launch applications

The error banners should never interfere with, contend with,

supersede or superimpose the Launch applications. To avoid such

contention, the minimum time required to present an error banner

should exceed the banner display time as set in section 8.4.2.

Requirement 9.5.6 Error banner latency

The error banner shall display within 20 s of the error condition

arising.

za dtt user interface+specification 1+0

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