Voluntary Labelling Scheme for Digital Terrestrial Television

Voluntary Labelling Scheme for Digital Terrestrial Television
Voluntary Labelling Scheme for Digital Terrestrial Television Receivers
Compliance Check Form
Brand :
Model :
Serial Number :
Firmware version :
(Important note: As a perquisite requirement for Compliance Check, the receiver under test (RUT) shall bear clear indications of its brand, model, serial number and firmware version.)
Item No.
Function
Reference / Details
DTT Receiver
Remarks
(C/NC/NT/T1)
Test signals will be fed to the RUT via RF input port at a level between -59 and -35 dBm (i.e. between 50 and 74 dBV) which will either be (a) DTT broadcasting signals received from off-air or (b)
sample transport stream(s) (TS(s)) as specified in the respective test items.
Important note:
Check items 1.1 -1.5 will be considered fail if, among others, one or more of the following syndromes are observed:
(a) video picture could not be shown on the TV screen completely;
(b) interruption of either video picture or audio sound occurs;
(c) failure on lip synchronization.
1.
Video Decoding Capability
1.1
Decode all programmes in the MFN
Signal source:
Off-air DTT broadcasts
multiplex (H.264)
Check whether the RUT can properly decode the
following channels:
Jade
ViuTV
Page 1 of 15
1.2
Decode all programmes in all SFN
Signal source:
Off-air DTT broadcasts
multiplexes (H.264)
Check whether the RUT can properly decode the
following channels:
RTHK TV 31
RTHK TV 32
RTHK TV 33
J2 Channel
I News
Pearl
J5 Channel
1.3
Decode all 720p HD programmes in all
Signal source:
Sample TS
SFN multiplexes (H.264)
Check whether the RUT can properly decode the HD
programme encoded in 720p format from the sample
TS.
Page 2 of 15
1.4
Decode all SD and HD programmes in
Signal source:
Sample TS
all multiplexes before and after any
Conditions:
A SD programme channel is presented
transition between HD programmes and
normally while transitions to/from SD & HD occur in
SD programmes within the multiplex
other programme channels in the same multiplex.
without the need of any manual
intervention (e.g. power on / off,
Check whether the RUT can properly decode the
re-scanning, etc)
selected SD programme channel from the sample TS.
Signal source:
Sample TS
Conditions:
Normal SD programmes are terminated
and followed by a still picture and then resumed in two
programme channels from the sample TS.
Check whether the RUT can properly decode each of
the two selected programme channels from the sample
TS.
Signal source:
Sample TS
Conditions:
A still picture is displayed and followed
by a HDTV programme and then reverted back to the
still picture in a programme channel from the sample
TS.
Check whether the RUT can properly decode the
selected programme channel from the sample TS.
Important note:
Check item 1.4 will be considered fail if manual intervention is required for the RUT to handle any signal transitions in the TS.
Page 3 of 15
1.5
Convert SD & HD signals to 720 x 576
Signal source:
Off-air DTT broadcasts
pixels, 1280 x 720 pixels and 1920 x
1080 pixels for display
Check whether the RUT can properly display the
following channels in the specified display formats:
RTHK TV 31
RTHK TV 32
RTHK TV 33
Jade
J2 Channel
I News
Pearl
J5 Channel
ViuTV
Page 4 of 15
720
x
576
1280
x
720
1920
x
1080
2.
Audio Decoding Capability
Important note :
2.1
Check items 2.1 – 2.4 will be considered fail if, among others, (a) interruption on audio sound and/or (b) failure on lip synchronization occur.
Decode programme sound of all SD / HD
Signal source:
Off-air DTT broadcasts
programmes (AC-3 2 channel stereo
mode)
Check whether the RUT can properly decode the
programme sound of the following channels encoded in
AC-3 stereo mode and produce stereophonic sound.
RTHK TV 31
RTHK TV 32
RTHK TV 33
Jade
J2 Channel
I News
Pearl
J5 Channel
ViuTV
Page 5 of 15
2.2
Decode programme sound in Dolby
Signal source:
Sample TS
surround mode to produce stereophonic
Condition:
Audio of a programme channel is
sound
encoded in Dolby surround sound mode.
Check whether the RUT can properly decode the
selected channel and produce stereophonic sound.
Signal source:
Off-air DTT broadcasts
Setting:
Tune to the programme channel Jade.
Check whether the RUT can properly decode the
programme sound encoded in Dolby surround mode and
produce stereophonic sound.
Page 6 of 15
2.3
Pass the AC-3 signal to an external AC-3
Signal source:
Off-air DTT broadcasts
decoder for decoding (AC-3
Setting:
Tune to the following channels one by
pass-through)
one :
RTHK TV 31
J2 Channel
Select the specified sound track on the RUT and pass
the selected programme sound to an external AC-3
decoder.
Check whether Dolby stereophonic sound
can be decoded by the external decoder.
Signal source:
Sample TS
Conditions:
Programme sound of a programme
channel is encoded in Dolby surround sound.
Setting:
Pass programme sound output of the
RUT to an external AC-3 decoder.
Check whether Dolby surround sound can be decoded
by the external decoder.
Signal source:
Off-air DTT broadcasts
Setting:
Tune to the programme channel ViuTV
and pass programme sound encoded in Dolby surround
sound mode output from the RUT to an external AC-3
decoder for decoding.
Check whether Dolby surround sound can be decoded
by the external decoder.
Page 7 of 15
Audio 1
Audio 2
2.4
Switch amongst received available audio
Signal source:
Off-air DTT broadcasts
channels
Setting:
Tune to the following channels one by
one :
RTHK TV 31
RTHK TV 32
RTHK TV 33
Jade
J2 Channel
I News
Pearl
J5 Channel
ViuTV
Check whether the RUT can
1.
correctly indicate and identify all available
programme sound tracks associated with the
programme, and
2.
switch amongst all available audio channels.
Page 8 of 15
3.
Miscellaneous
Descriptions
Observations
2
(T/NT)
The RUT will be set up to receive DTT off-air broadcasting signals for the remaining checks unless otherwise specified.
3.1
STB provides a means to convert the received
Setting:
Select 16:9 pillar box DTT programme channel(s) from the off-air
signal in either 4:3 or 16:9 format to satisfy the
DTT broadcast signal.
viewer’s display unit in a standard or widescreen
picture on a TV in 4:3 mode.
Set the display mode to 4:3.
Display the output
format.
Check whether all pictures, including channel list, presentation of now / next
information (if present), EPG, On Screen Display (OSD) menu & subtitle can
be properly displayed in the TV using pan scan mode.
Setting:
Select 16:9 widescreen DTT programme channels which should
include RTHK TV 31, I News and ViuTV from the off-air DTT broadcast
signal.
Set the display mode to 4:3.
Display the output picture on a TV in
4:3 mode.
Check whether the picture including channel list, presentation of now / next
information (if present), EPG, OSD menu & subtitle can be properly displayed
in the TV using letter box mode.
Important note:
Missing noticeable information (e.g. part of station logo,
figure, and character) is not acceptable.
3.2
Proper display of LCN (e.g. 11, 12, ..., 84, 85, etc)
Setting:
Display EPG and, if applicable, channel list.
in the EPG display and, if present, the available
service list
Check whether the LCNs 31, 32, 33, 81, 82, 83, 84, 85 and 99 are accurately
presented in two-digit format.
If the corresponding service names are
shown, check whether the service names are properly displayed.
Important note:
Missing any of the above LCNs or display of LCN other
than those listed above (e.g. 9xx) will not be accepted.
Page 9 of 15
Remarks
3.3
Proper display of service names in bilingual in the
Setting:
Select Chinese OSD and display the channel list.
EPG display (e.g. RTHK TV 31 / 港台電視 31,
Jade / 翡翠台, ViuTV / ViuTV)
Check whether the Chinese service names as approved by the Communications
Authority (see
http://www.ofca.gov.hk/filemanager/ofca/tc/content_108/channel_list_chi.pdf
and
http://www.ofca.gov.hk/filemanager/ofca/en/content_108/channel_list_eng.pdf)
which are copied below for reference are correctly displayed.
Any derivation
from the following will not be accepted unless the difference is originated from
the transmission side.
31
港台電視 31 RTHK TV 31
32
港台電視 32 RTHK TV 32
33
港台電視 33 RTHK TV 33
81
翡翠台 Jade
82
J2 台 J2 Channel
83
互動新聞台 I News
84
明珠台 Pearl
85
J5 台 J5 Channel
99 ViuTV ViuTV
Switch to English OSD menu and repeat the same procedure to check the
English service names.
3.4
Service names sorted by LCN in the ascending
Setting:
Display channel list or EPG.
order
Check whether the LCNs and the corresponding bilingual service names given
in Item 3.3 are sorted by the LCN in the ascending order.
Page 10 of 15
3.5
Proper display of Program Title
Setting:
Tune to the programme channel RTHK TV 31.
(e.g. 財經新聞, News Review, etc) in EPG page
and display the EPG.
Set Chinese OSD
Check whether all characters / symbols in the Chinese programme titles are
properly displayed in the 7 days EPG.
Similarly, display and check the
English programme titles by tuning to the programme channel Pearl and
switching to English OSD. Incomplete EPG will not be accepted.
Signal source : Sample TS
Setting:
Search EPG where sample symbols and characters are encoded
and selected from ISO/IEC 10646 : 2003 and Amendment 1 which includes
Hong Kong Supplementary Character Set.
Check whether all characters / symbols in the EPG are properly displayed.
Important note:
Missing or incorrectly displaying any characters / symbols
will not be accepted
Page 11 of 15
3.6
Proper display of all available subtitles (e.g.
Signal source:
Sample TS
English, traditional Chinese, simplified Chinese,
Conditions:
Subtitles in programme service are presented in advance of the
etc) in all receivable SD and HD programmes
corresponding video by 1 second.
The test segment contains three subtitles of
the same content (in Traditional Chinese) with the Multilingual Component
Descriptor set to Traditional Chinese, Simplified Chinese and English
respectively.
Setting:
Enable display of subtitle on the RUT.
Check whether
1.
each subtitle is clearly identified (e.g. Language 1, Language 2 and
Language 3 or Traditional Chinese, Simplified Chinese and English)
2.
the descriptor correctly describes the content of the subtitle (i.e.
Showing up English subtitle after selecting Traditional Chinese subtitle
will not be accepted)
3.
the selected subtitle can be properly displayed (subtitle not synchronised
with programme sound, improper positioning of subtitle (e.g. in the
centre of the screen), etc are not acceptable)
4.
the subtitle will be promptly refreshed after tuning to another channel
Disable display of the selected subtitle and check whether the selected subtitle
disappears.
Repeat the checking for all available subtitles.
Select the segment with the subtitles recorded in advance of the corresponding
video by 3 seconds. Repeat the above checking.
3.7
Capable of correlating the channel number label for
Setting:
Key in any three LCNs given in Item 3.2 above via the keypad of the
service selection on remote control with the LCN
remote control.
Check whether the RUT can properly tune to the selected programme channels.
Page 12 of 15
3.8
3.9
Proper display of current date and time information
Check whether date and time information is accurately presented on the TV
if the information is presented
screen, if such display function is available.
Include the following functions in the remote
Check whether the remote control has provisions (e.g. a button or activating
control:
menu selection) to display EPG, select sound track (e.g. Dolby 2.0 / Dolby 5.1)

Display the EPG
/ language (e.g. Cantonese / English), activate or deactivate the display of

Select sound track / language (e.g. Chinese /
subtitle and select available subtitles (e.g. traditional Chinese and English).
English)

Activate or deactivate the display of subtitle

Toggle between available subtitles (e.g.
traditional Chinese and English)
3.10
The receiver should be capable of proper decoding
Signal source:
Sample TS.
all programme channels broadcast in any
Conditions:
The sample TS will be modulated according to any
multiplexes within the frequency band 470 – 862
combination of the given technical parameters and is transmitted in any
MHz.
frequency channel in the TV frequency band 470 – 862 MHz.
The multiplexes may use any combinations
of the following options :
Mode – C = 3780
Check whether all programme services contained in the segment of the Sample
Modulation – 64QAM, 16QAM & 4QAM
TS can be properly decoded and displayed on TV screen.
Frame Header – PN 945 & PN420
Code Rate – 0.4 and 0.6
Important note:
Symbol Interleaving – Mode 2 i.e. B = 52 and M =
programme with some manual interventions (e.g. retuning, channel scanning or
720 symbols
re-boot), the expected response time after the change of the technical
While it is acceptable that the RUT can decode the
parameters should be sufficiently fast, clearly stated and make known to
consumers.
Page 13 of 15
Burn-in Test – the receiver under test should still
3.11
Setting:
Tune to a HD channel e.g. RTHK TV 31, Jade, ViuTV, etc.
function properly after a continuous operation for
not less than 15 hours.
(a) Check whether the RUT can properly decode the selected programme.
(b) Without changing any setting, leave the RUT for a continuous operation
of 15 hours. Check whether the RUT can properly decode the selected
programme.
Also check whether the RUT can tune to SD channels, if
any, and properly display the selected programmes.
Important note:
Missing either video picture or audio sound, frozen of
screen, blocking, unsmooth motion, etc are not acceptable.
Others
3.12
Note :
1.
C – comply,
NC – not comply,
NT – not tested,
2.
T – Tested, NT – not tested
3.
To be conducted depending on the services presented in the off-air broadcast signals during the tests.
4.
The above test items are subject to revision from time to time if the situation warrants.
5.
The lists of problems (e.g. Missing or incorrectly displaying any characters / symbols will not be accepted.) do not constitute a comprehensive list of all problems which may be encountered. In
T - Tested
case of doubt about the interpretation on compliance of a particular check, the decision of OFCA shall be final.
Page 14 of 15
Assessed by :
Attended by:
Date :
Company :
Company Chop:
Approved by :
Date :
Last Revision Date : 5 April 2016
Implementation Date : 5 April 2016
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