Hbbtv mpeg2ts 3 #6
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rest of the world, DVB and ISDB systems need to be taken into account, too.
(spoken word only); almost done with captions cues
clarified container format for subtitles and captions
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
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 <p> 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 <p> 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 <p> 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
…or sourced text tracks
| <p> | ||
| In the case of CEA 708 closed captions, decimal representation of the 'caption_service_number' in the 'Caption Service Descriptor' in the PMT. | ||
| </p> | ||
| <p> |
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I'm beginning to think that the different types of MPEG2-TS files need completely different sections. This is starting to become unreadable. |
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Frankly, I thought about a different way of laying it out initially too. Having separate sections dedicated to ATSC, DVB, etc. would likely be more in line with the needs of a browser implementer. On the other hand, the spec text may be easier to maintain and keep consistent if the criteria for the different broadcast standards are side by side. Looking at it from the HTML diff, dedicated sections might seem easier to digest. Using the visual diff, the side-by-side in a table might seem more readable. Finally, for an application author (and I think that would be the majority of readers?) it would seem beneficial to see at a glance how his application will behave/perform when used with different broadcast standards? With separate sections, that could seem more difficult to figure out. Overall, I'm honestly pretty passionless on what way to structure this. Whatever works best for you and your audience. |
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The majority of readers should be browser and other UA developers. Application authors should not need to understand this as browsers will simply provide the support. Let's see how the discussion on the mailing list goes. But I'm pretty keen to have this as a separate section. |
This is pull request 5 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: