Hbbtv mpeg2ts 2 #5

c-alpha · 2014-09-16T20:10:41Z

This is pull request 4 out of 9 and it contains updates proposed by HbbTV for the section on MPEG2-TS. See the visual diff to silviapfeiffer/HTMLSourcingInbandTracks:master for a better overview than the diffs. Please ignore the (many) individual diffs contained in this request, and focus on the diffs (source and visual) alone.

Change notes and rationale:

I have converted the bullet list on determining the type of track into a table to make room for DVB and ISDB, and retained the existing text in the ATSC row.
In the ATSC row, I have changed the quoting style to be in-line with the rest of the document.
In the DVB row, I have added the criteria for DVB streams as needed for the HbbTV profile of DVB.
ISDB needs to be filled in by someone knowledgeable.

rest of the world, DVB and ISDB systems need to be taken into account, too.

for missing refs

(spoken word only); almost done with captions cues

clarified container format for subtitles and captions

…nce)

start and end times would seem sufficient.

…we need to make use of the triplet, and where possible of the component_tag.

…ngInbandTracks # By Silvia Pfeiffer # Via boblund (2) and Silvia Pfeiffer (1) * 'master' of https://github.com/silviapfeiffer/HTMLSourcingInbandTracks: Clarify how CEA708 captions are exposed in MPEG-2. Clarify the possibilities of exposing in-band MPEG-2 SCTE 27 subtitles. Fix typo s/TextTrackCue/TextTrackCue/ Make document more readable and fix captionservice link. Conflicts: index.html

@kind

Merge commit '81c4b26e5735fbe3e374ab6ba52e438a81ba5b14' * commit '81c4b26e5735fbe3e374ab6ba52e438a81ba5b14': Removed DASH-AVC-TT in localBiblio Acknowledge the origins of this spec in the HTML WG and WHATWG. Fix duplicate definitions. ISOBMFF TTML as DataCue Added alternatie VTTCue mapping for ISOBMFF TTML and 3GPP Fixed up comments Explicitly stated how WebVTT and TTML text tracks are identified ISOBMFF text tracks and captions DASH TTML file as DataCue Added alternative VTTCue mapping for DASH file TTML Fixed up tags Exposing DASH text tracks as cues mpeg2ts: 708 captions in AVC video MPEG-2 TS: Fixed @language for descriptions and added ref for @kind descriptions Add text to set @Label from mpeg-2ts data.

…er merge commit messages

…value "descriptions" editorial tidy-up

…ht of the comments to #2672

* removed metadata tracks as not needed * removed subtitles and captions cues as not use-case

* editorial tidy up

* added notes to indicate that 'namespace' needs discussion

* isobmff: 2014-08-27 telechat: * added notes to indicate that 'namespace' needs discussion isobmff: current state of discussions with Nigel

* dash: 2014-08-27 telechat: * editorial tidy up dash: fix angle brackets and unneeded tags Jon's CR r01 starting changes to DASH section Conflicts: index.html

* mpeg2-dvb: separated audio and video * mpeg2-dvb: deferring to annex J of DVB-SI for supplementary audio

* mpeg2: text tracks only ever use one component

… pull requests

…pe of track

silviapfeiffer · 2014-09-22T10:15:52Z

index.html

+              </td>
+            </tr>
+            <tr>
+              <th>ISDB</th>


Let's not specify ISDB if we know nothing about it.

I was hoping that there might have been some ISDB expertise among the the W3C participants, as typically the Japanese electronics firms are more active with Japanese experts in your organisation. In HbbTV, we typically see European colleagues from the Japanese companies.

If there should be no expertise available, I agree that we should not have an empty ISDB section in the published spec..

silviapfeiffer · 2014-09-22T10:18:03Z

In general, I'd like to know if any browsers are supporting DVB and ATSC already? If not, why do we need all this extra complexity?

c-alpha · 2014-09-22T11:41:25Z

Connected TV sets that implement HbbTV (i.e. the large majority of connected TV sets deployed in Europe) already support good part of that functionality, although in ways specific to HbbTV and OIPF (which HbbTV builds upon). For the next version of HbbTV (which we are currently preparing), we will be basing our work on HTML5 instead of CEA-2014 as in previous versions.

How many browser instances that makes? Some 25-ish million TV sets are sold in the EU per year. To my knowledge, the connected TV share is 40-ish percent. That would mean 10 odd million new connected TV sets in the EU every year. The actual connection rate (i.e. the number of people wo actually hook it up to their Internet service) is probably 60 odd percent. So there's millions of them, they're just not desktop browsers.

silviapfeiffer · 2014-09-23T01:49:55Z

Can you point me to implemented instances or are these all closed source implementations?

c-alpha and others added 30 commits June 25, 2014 16:12

For MPEG-2 TS, the current text deals with ATSC systems only. For the

8e174d1

rest of the world, DVB and ISDB systems need to be taken into account, too.

mixed up stream_type (PMT) and stream_id (PES header)

63760b4

identifying DVB components

5734927

use sections instead of lists

00fdf1f

added attributes for text tracks

c971b3c

"applications" is too generic

81ba23a

added info on how to determine the broadcast system type

29e9f09

added attributes for audio and video tracks, added local bibliography

be011a2

for missing refs

adding data broadcast as metadata tracks in addition to subtitles

22d5b4c

distinguishing captions (for the hard of hearing) from subtitles

3300cbe

(spoken word only); almost done with captions cues

attributes for subtitles are the same as for captions;

6689311

clarified container format for subtitles and captions

make clear that the kind of system is meant (not the particular insta…

f1367f5

…nce)

For cues there is no general, natural identifier. Finding them via

ade2629

start and end times would seem sufficient.

The id attribute must have a unique value within the document. Hence …

c80a7b4

…we need to make use of the triplet, and where possible of the component_tag.

fix broken captionservice link

3067ba8

remaining updates from upstream repo

e56dfc8

when one opens a tag, one should also close it...

0496b93

options captured in 2014-08-19 telechat

6e2aaca

manual merge of Silvia's changes to the MPEG-2 section as hinted by h…

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…er merge commit messages

different lists of component_types for MPEG-1 and HE-AACv1/2 for @kind …

11cf4b3

…value "descriptions" editorial tidy-up

fixup HTML structure

3906382

starting changes to DASH section

0f4829e

Jon's CR r01

635175b

dash: fix angle brackets and unneeded tags

a85c374

isobmff: current state of discussions with Nigel

a1a163b

mpeg2 audio tracks: revised "descriptions" and "main-desc" in the lig…

5418e7c

…ht of the comments to #2672

2014-08-27 telechat:

31f525c

* removed metadata tracks as not needed * removed subtitles and captions cues as not use-case

2014-08-27 telechat:

bb48d9a

* editorial tidy up

c-alpha and others added 9 commits August 27, 2014 11:55

2014-08-27 telechat:

0af85f6

* added notes to indicate that 'namespace' needs discussion

Merge branch 'isobmff'

f0436b8

* isobmff: 2014-08-27 telechat: * added notes to indicate that 'namespace' needs discussion isobmff: current state of discussions with Nigel

Merge branch 'dash'

5ac3dfa

* dash: 2014-08-27 telechat: * editorial tidy up dash: fix angle brackets and unneeded tags Jon's CR r01 starting changes to DASH section Conflicts: index.html

telechat with Simon and Chris on 2014-08-27, 15:00-17:00 CEST:

6db5abe

* mpeg2-dvb: separated audio and video * mpeg2-dvb: deferring to annex J of DVB-SI for supplementary audio

* mpeg2: PID is 13 bits (not 16)

bfe946a

* mpeg2: text tracks only ever use one component

Add the bug tracker link to the spec.

2bb2b1c

Add the bug tracker link to the spec.

ebb86fc

back to commit 2339234 [2339234] in preparation to split into smaller…

eec0cb8

… pull requests

HbbTV proposed updates to the MPEG2-TS section for determining the ty…

386a6d1

…pe of track

silviapfeiffer reviewed Sep 22, 2014
View reviewed changes

silviapfeiffer force-pushed the master branch from 2339234 to 81c4b26 Compare September 22, 2014 10:58

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Hbbtv mpeg2ts 2 #5

Hbbtv mpeg2ts 2 #5

c-alpha commented Sep 16, 2014

silviapfeiffer Sep 22, 2014

c-alpha Sep 22, 2014

silviapfeiffer commented Sep 22, 2014

c-alpha commented Sep 22, 2014

silviapfeiffer commented Sep 23, 2014

Hbbtv mpeg2ts 2 #5

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Hbbtv mpeg2ts 2 #5

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