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Chris.SE:
You make a good point about distribution.
The EIT for the SD channel has a stack of HD Simulcast Linkage descriptors as in this example event:
005 5, Thu 15 May 2025 21:00:00 BST - Thu 15 May 2025 22:00:00 BST: New: The Game
Conclusion of the tense thriller starring Jason Watkins, Robson Green and Sunetra Sarker. Sending Alice and Margot away for their own safety, Huw vows to confront Patrick on his own. (Ep4/4)[AD,S]
(tag_hex89: Contains violence, mild language and blood)
Linkage: 233A.4082.4540 = not_found, event_simulcast, target_listed, target_event_id = A7C0
Linkage: 233A.4083.4540 = not_found, event_simulcast, target_listed, target_event_id = A7C0
Linkage: 233A.4084.4540 = not_found, event_simulcast, target_listed, target_event_id = A7C0
Linkage: 233A.4085.4540 = not_found, event_simulcast, target_listed, target_event_id = A7C0
Linkage: 233A.4088.4540 = 5 HD, event_simulcast, target_listed, target_event_id = A7C0
Linkage: 233A.4089.4540 = not_found, event_simulcast, target_listed, target_event_id = A7C0
Linkage: 233A.408E.4540 = not_found, event_simulcast, target_listed, target_event_id = A7C0
Linkage: 233A.40BB.4540 = not_found, event_simulcast, target_listed, target_event_id = A7C0
Linkage: 233A.40BC.4540 = not_found, event_simulcast, target_listed, target_event_id = A7C0
Linkage: 233A.40BD.4540 = not_found, event_simulcast, target_listed, target_event_id = A7C0
Linkage: 233A.40BE.4540 = not_found, event_simulcast, target_listed, target_event_id = A7C0
MPEG-2 video, 16:9 aspect ratio without pan vectors, 25 Hz (und)
MPEG-1 Layer 2 audio, stereo (2 channel) (eng)
DVB subtitles (normal) with no monitor aspect ratio criticality (eng)
MPEG-1 Layer 2 audio description for the visually impaired (eng)
crid = /V85BUBO, Type: 31 (item), crid = /R120K, Type: 32 (series)
eventID = A7C0, ONID.TSID.SID = 233A.200B.2134, default_authority = www.five.tv, 578 MHz, uhf 34
The one that is found is 4088 - the TSID of BBC B Winter Hill.
The TACOLNESTON (4087) and MENDIP (4081) BBC B are absent.
You can see the (in decimal - UK DVB-T TSIDs only make sense in HEX) TSIDs on digitalbitrate at the bottom of these pages:
https://www.digitalbitrat…g=en
TSID = 16519 = 4087
https://www.digitalbitrat…g=en
16513 = 4081
So, the SI is divided into at least two groups.
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Chris.SE:
Scrap that. I remembered I had a sample of arqb from Mendip, courtesy of a bout of tropo, and reading the EIT out of it revealed the same set of TSIDs in the linkages.
So, it turns out to be just another example of half-baked data from Freeview.
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Talking of half-baked data, here is the target event of the linkages:
105 5 HD, Thu 15 May 2025 21:00:00 BST - Thu 15 May 2025 22:00:00 BST: New: The Game
Conclusion of the tense thriller starring Jason Watkins, Robson Green and Sunetra Sarker. Sending Alice and Margot away for their own safety, Huw vows to confront Patrick on his own. (Ep4/4)[AD,S]
(tag_hex89: Contains violence, mild language and blood)
MPEG-2 video, 16:9 aspect ratio without pan vectors, 25 Hz (und)
MPEG-1 Layer 2 audio, stereo (2 channel) (eng)
DVB subtitles (normal) with no monitor aspect ratio criticality (eng)
MPEG-1 Layer 2 audio description for the visually impaired (eng)
crid = /V85BUBO, Type: 31 (item), crid = /R5120K, Type: 32 (series)
eventID = A7C0, ONID.TSID.SID = 233A.4088.4540, default_authority = www.five.tv, sdtCMD = F7,
The point to note is that the components are wrong - they are identical to the SD version.
The correct components are:
H.264/AVC high definition video, 16:9 aspect ratio, 25 Hz (und)
HE-AAC audio, stereo (eng)
DVB subtitles (normal) for display on a high definition monitor (eng)
HE-AAC audio description for the visually impaired (eng)
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Could be.
Like 5HD, these have incorrect EIT components:
046 5SELECT
057 U&Eden
066 TBN UK
069 LEGEND XTRA
071 That's TV 3
EIT for those shows:
MPEG-2 video
MPEG Audio
Correct components are:
H.264 Video
AAC Audio
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Well, the idea was that you check those channels to see if they exhibit the same problem as 5HD.
If so, and all others do not, we have found where the problem lies.
Where to go from there is another question.
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in post Tacolneston (Norfolk, England) Full Freeview transmitter | free and easy for 22 years you said:
"Also noticed that ch 5 HD the same sound and same level is coming out of ALL the speakers"
Is that the case with these channels too?
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Page 2
Thursday 15 May 2025 2:28PM
Chris.SE
Seems highly unlikely that we are looking at a sync problem across all transmitters.
A search for "5HD sync" brings nothing in the last year, but search engines. these days, are carp.
Perhaps David could suggest a programme we might record so we can agree lack of sync.
What impressed me was the failure of David's system to correctly render the format of the audio.
That being the case, a sync problem is unsurprising.