EAS Crawl Text, Color, Speed, Manual Switching, and Background Image

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Would it make sense for a standard to be set concerning where on the screen an EAS crawl should be set? With aspect ratio conversion between carriers, differently formatted sets and all, should we establish a uniform raster location for alerts? Should it be different for watches versus warnings?


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Similar Ideas [ 4 ]


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  1. Comment

    I believe most (if not all) stations run EAS crawls at the top of the screen.

    In my area, for example, EAS crawls are at the top of the screen, while any news or weather event (from the news station) crawls are on the bottom.

    In my opinion, all crawls should be at the top. CC text is usually placed toward the bottom of the screen, which would make it hard to read (if at all).

  2. Comment
    Community Member

    A next generation EAS should provide for the capability of receivers to insert the crawl as a future feature. This could use 708 captioning capability suitably adapted. However such crawls should have the location specified, and for compression system efficiency and simpler TV design, the first and last line should coincide with MPEG-2 block boundaries for 480, 576, 720, 1080 and as appropriate for 2k. Then with broadcaster and receiver generating the identical crawl, it may be possible in the future to phase out broadcaster crawl insertion which improves the ability for selectivity of the video.

    As the receiver in ATSC M/H displays vary, and the receiver is smarter and capablie of processing next generation EAS, the data and audio can be transmitted, rather than it being in the program audio and video. So selectivity by polygons etc. should become possible when the receiver can use the cell system for location. This should be better than the CMAS/PLAN implementation approach when the TV function in the receiver is active. There should be standards committee liaison activity to define this.

  3. Comment

    I thought that the top third of the screen was "reserved" for emergency information but I see ads occasionally that run crawls across the upper third. It's confusing for viewers, particularly the sight-impaired, to know the difference between an EAS crawl and the address of a used car lot. When we decide where the EAS crawl or banner should be placed, we should ask the FCC to protect that "real estate"!

  4. Comment

    what about for providers that use the lower third of the screen?

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