[WR/ARIB] Compatibility with ARIB-TTML / 1. Image handling

[himorin]

Per: w3c/ttwg#116
Comment 3 (#545), 1

ARIB-TTML can render the images with the texts in the same TTML document. A BASE64 encoded image can be embedded into the document by ‘smpte:image’ element. Such an embedded image or an image referenced as the external entity can be rendered by ‘smpte:backgroundImage’ attribute.

[nigelmegitt]

I am interested to know more about the use case for this. For example, perhaps it is used to allow non-Unicode symbols such as company logos to be included, or perhaps it is used to provide complex background images behind the text, with graphical effects like gradients, bevels etc.

[css-meeting-bot]

The Timed Text Working Group just discussed [WR/ARIB] Compatibility with ARIB-TTML / 1. Image handling imsc#546, and agreed to the following:

• SUMMARY: TTWG would like to know more about the use cases for this feature, and complexity of implementation.

The full IRC log of that discussion

<nigel> Topic: [WR/ARIB] Compatibility with ARIB-TTML / 1. Image handling imsc#546
<nigel> github: https://github.com//issues/546
<nigel> Nigel: I want to know more about the use case for this.
<nigel> Pierre: I agree this is the essential question.
<nigel> .. Thinking about going back to ARIB, asking for sample documents or exemplar renders
<nigel> .. would be really helpful.
<nigel> Cyril: I remember that when we discussed mixing text and image profile we said we would
<nigel> .. not do it because there are other ways to do it, and that there's a complexity side to it too.
<nigel> Pierre: That's my recollection too. My question is do they have use cases that cannot be
<nigel> .. solved with the current approach.
<nigel> .. Image and Text can mean many different things. It would be good to understand what they mean.
<nigel> Cyril: I wonder if we should ask about the complexity of implementation too.
<nigel> Pierre: Yes I think that would be great if they could point to a reference implementation so
<nigel> .. we can understand complexity.
<nigel> Nigel: Two things for me to add to the list for w3c/ttwg#116: 1. Request more info about use cases; 2. Ask about complexity.
<nigel> SUMMARY: TTWG would like to know more about the use cases for this feature, and complexity of implementation.

[mikedo]

Some of you may recall I was the one concerned about addressing Japanese captioning needs for small glyph-like images. It may be faster/easier to ask an individual familiar with it. I'll reach out.

[nigelmegitt]

@mikedo I'm preparing a response to ARIB and wonder if you have received any response from your contacts that we should take into account?