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Red button interactive functionality

  • 29-04-2009 4:04pm
    #1
    markmagennis
    Registered Users, Registered Users 2 Posts: 39 ✭


    Anyone know what is required of a DTT receiver to support the interactive 'red button' functionality (apart from a red button that is)? Is it a given with MHEG-5 support?

    The reason I'm asking is that I'm wondering how DTT receivers can show Irish Sign Language with programmes. Analogue TV can only deliver 'open' sign language, where the signer is embeded in the video and individual viewers cannot turn it on or off. In contrast, subtitles can be 'closed', like the subtitles for the deaf available on Teletext page 888.

    On digital, instead of (or as well as) Teletext you can have closed DVB subtitles (there's a standard for it), but as far as I know there is no DVB sign language standard. One way of transmitting sign language would be to use the red button interactive picture-in-picture capability, so I'm wondering what would a functional specification for DTT receivers need to say to make sure the receivers were capable of accessing this?

    Thanks,
    Mark


Comments

  • #2
    netwhizkid
    Closed Accounts Posts: 3,558 ✭✭✭netwhizkid


    Irish DTT Receivers or TV's with integrated tuners will need MHEG-5 for the red button functionality. This will deliver Digital Aertel but Analog Aertel should also be simulcast afaik like it is with RTÉ on Sky Digital. RTÉ on Sky Digital does not have the Red Button feature yet but hopefully will have in future, as they will have to design new standards as Sky Digital does not use MHEG-5 but rather a different software called OpenTV.

    I am not sure whether RTÉ will even have any signed programmes where the person is signing the programme in the bottom right corner, I have not seen any yet on either Analogue or on RTÉ via Sky. There are many signed programmes on Sky such as Discovery etc. that are signed but the signing is imbedded and cannot be removed afaik.

    It is something that they are probably obliged to investiaget but would not be well up their chain of priorities which is not good news for those Deaf or hard of hearing etc. :(


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