Re: Updated Proposal for ISSUE-192: R0041 doesn't allow for EBT-TT conversion easily. Revise R0041 to a SHOULD.

My action from last call was to confirm on the character limitation for 
teletext in europe (WS Teletext), which is still the reference even if 
the distribution format is different (e.g. DVB subtitling). The maximum 
number of visible characters per line is 38, so the change proposal 
would address possible transformation problems for EU content that 
should be displayed in the US.

Best regards,

Andreas

Am 25.10.2012 10:16, schrieb Monica Martin (MS OPEN TECH):
> Updated proposal to close Issue-192
>
> Updated proposal addresses EBU requirements for display of European content in the US and the concerns raised about 16-9 display formats.
>
> Change from: At most 32 characters must be present in any displayed text line.
> Change to: No more than 38 characters MUST be present in any displayed text line where the aspect ratio of the root container is 4:3 and no more than 42 characters MUST be present for 16:9.
>
> Also add these 2 new requirements:
> The total character limit for displayed text should be 152 where the aspect ratio of the root container is 4:3.
> The total character limit for displayed text should be 168 where the aspect ratio of the root container is 16:9.
>
> Add a note following the requirements:
> These requirements accommodate European content that is to be displayed in the US.
>
> Thanks.
>
> Monica J Martin
> Senior Program Manager
> Microsoft Open Technologies, Inc.
> A subsidiary of Microsoft Corporation
>
>
> -----Original Message-----
> From: Michael Dolan [mailto:mdolan@newtbt.com]
> Sent: Wednesday, October 17, 2012 11:16 PM
> To: public-tt@w3.org
> Subject: RE: Proposal for ISSUE-192: R0041 doesn't allow for EBT-TT conversion easily. Revise R0041 to a SHOULD.
>
> I think this is not a general solution since it does not address other display aspect ratios, such as 21:9, which is becoming more common, and it is silent on every other aspect ratio.
>
> Also, with the change to SHOULD, this allows unlimited characters/line on 4:3, which I don't think was intended.
>
> An informative note should be added to state that the cellResolution needs to set accordingly since the initial TTML attribute value force 32x15 no matter what the display aspect ratio is.
>
> This needs further discussion, think.
>
>  Mike
>
> -----Original Message-----
> From: Monica Martin (MS OPEN TECH) [mailto:momartin@microsoft.com]
> Sent: Wednesday, October 17, 2012 9:53 PM
> To: 'public-tt@w3.org'; Michael Jordan (mijordan@adobe.com)
> Subject: Proposal for ISSUE-192: R0041 doesn't allow for EBT-TT conversion easily. Revise R0041 to a SHOULD.
>
> Here is a draft proposal for Issue-192 and Action-114 on R0041.
>
> Change from: At most 32 characters must be present in any displayed text line.
> Change to: No more than 32 characters SHOULD be present in any displayed text line where the aspect ratio of the root container is 4:3 and no more than 42 characters MUST be present for 16:9.
>
> Monica
>
> -----Original Message-----
> From: Timed Text Working Group Issue Tracker [mailto:sysbot+tracker@w3.org]
> Sent: Thursday, October 11, 2012 7:22 AM
> To: public-tt@w3.org
> Subject: ISSUE-192: R0041 doesn't allow for EBT-TT conversion easily. Revise R0041 to a SHOULD.
>
> ISSUE-192: R0041 doesn't allow for EBT-TT conversion easily. Revise R0041 to a SHOULD.
>
> http://www.w3.org/AudioVideo/TT/tracker/issues/192
>
> Raised by:
> On product:
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Andreas Tai
Production Systems Television IRT - Institut fuer Rundfunktechnik GmbH
R&D Institute of ARD, ZDF, DRadio, ORF and SRG/SSR
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Received on Thursday, 25 October 2012 12:35:23 UTC