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However, there are peripheral effects. ATSC 3.0 includes features for auxiliary streams, for example. This could be data to make clickable icons as part of the program, or provide multiple selectable camera angles in sports. The question then becomes if the streaming services will carry any of the ancillary data, not if they will carry the main program or not, which will still be determined by economic/profit considerations, just as today a cable system may carry only a station's main program and not its subchannels. ATSC 3.0 also has very flexible trade-offs of data rate vs. signal robustness in the broadcast signal, so a single transmitter can emit multiple programs (like ATSC 1.0 does) except that the video resolution and signal robustness may be very different for a stream intended for mobile reception vs. an ultra high definition stream intended for use only with a good antenna. Again, when stations are broadcasting multiple streams, a streaming service may carry only certain ones, and might, for example, down-res ultra HD to regular HD. Since the interface from the streaming service to your streaming box is QAM, carrying internet protocol data, and the interface from the box to your TV is a HDMI cable, neither of these is affected at all by the signal format that is broadcast through the air. What gets transferred from over-the-air stations to streaming services will continue to be determined by business considerations, not technical ones. |
#47
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Jeff, WB8NHV Collecting, restoring and enjoying vintage Zenith radios since 2002 Zenith. Gone, but not forgotten. Last edited by Jeffhs; 12-16-2017 at 02:03 PM. |
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Jeffhs,
https://www.techhive.com/article/323...nix-first.html http://www.tvtechnology.com/atsc3/00...atsc-30/282269 https://www.thebroadcastbridge.com/h....0-test-market ATSC 3.0 is in effect now, not 5 years from now. Did you read my above post? I tried to clarify for you, evidently I was not successful. (Beta testing is underway, we are applying to be a beta tester.)
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Last edited by etype2; 12-16-2017 at 06:53 PM. Reason: Add info |
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No kidding. Remember AM radio dials with CONELRAD markings? Anyone who has watched Christine has seen them. I rest my case.
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#50
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BTW, yes, I have seen the movie "Christine", and the tuning scale on the car's radio did in fact have the CD symbols at 640 and 1240, as did all car and home radios made between 1953 and 1963. I have a Zenith C-845 AM-FM table radio, made in 1960, that has these symbols (actually the letters "CD", not the icons themselves) at 640 and 1240 as well. These markings were placed by law on all AM radio dials so that people would not waste valuable time looking for the local Conelrad alert station when local stations went off the air per FCC regulations in effect at the time. Another reminder of the Cold War era was a YouTube video of a Conelrad radio test gone awry, in Fort Wayne, Indiana. The station was WOWO-1190 and the DJ had just put on a record; suddenly, the sound faded to nothing and a station announcer was heard issuing a Conelrad alert. The alert turned out to have been erroneously broadcast over stations in the Fort Wayne area due to an unfortunate mixup. Do a Google search to see the entire story of this incident, which I am sure anyone who was living in the area at the time will never forget. I live 30 miles outside Cleveland, and grew up in a suburb 15 miles east of the city; however, I don't recall ever hearing any botched Conelrad alerts on local radio stations. However, in the '70s, someone with a warped sense of humor came up with a musical version of the Conelrad (by then EBS, for Emergency Broadcast System) test, which was later banned and in fact was declared illegal. That the test was sung instead of being read from a script by an announcer was bad enough, but the worst part of that illegal Conelrad test was how it ended: "This concludes this test-----of the Emergency Broadcast System! Did you pass?" I believe that ending, and that the test was made into a singing jingle, was what finally got the jingle banned from American radio, and I don't blame the FCC for doing that, if in fact they did; after all, this was meant to be an emergency alert, meant to be read, not sung, by an announcer. IMO, whomever came up with the idea for this should have been arrested and jailed for attempting to make a mockery of the former Emergency Broadcast System. I'm sure if anyone ever tried to do this with today's Emergency Alert System (EAS), the person would in fact be prosecuted to the fullest extent of the law.
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Jeff, WB8NHV Collecting, restoring and enjoying vintage Zenith radios since 2002 Zenith. Gone, but not forgotten. Last edited by Jeffhs; 12-16-2017 at 08:33 PM. |
Audiokarma |
#51
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UntiI I read your post, I didn't know that ATSC 3.0 has already been enacted and is now in use, superseding its predecessor, ATSC 1.0. I read the articles your post links to, and that just reinforces what you said: that ATSC 3.0 is being tested in the Phoenix, Arizona market on that area's television stations. If the Phoenix tests go well, other areas' TV stations may adopt the new standard, although such will be entirely voluntary, not necessarily required by law.
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Jeff, WB8NHV Collecting, restoring and enjoying vintage Zenith radios since 2002 Zenith. Gone, but not forgotten. |
#52
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I don't know if nukes were a threat up here but my 1955 Pye radio scale lacks the CONELRAD symbol. It's a British design but was made at a plant in Ontario so who knows. |
#53
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I'm waiting for a day that all the DTV's and digital cable boxes become a brick when a special virus effects and corrupts the bios/flash chips in them and make them renderless and no fix available .That would put the numnuts that came up with the system on the spot. lease we have no issues if analog was still here.
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Now we have this goof-ball with the lousy haircut to worry about. |
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Tom C. Zenith: The quality stays in EVEN after the name falls off! What I want. --> http://www.videokarma.org/showpost.p...62&postcount=4 |
Audiokarma |
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#57
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I'm more worried about the OTA set-top boxes and the newer sets that have ATSC capability.
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The chances of HDTVs, set-top boxes, DTV converter boxes, etc. being irreparably damaged or even destroyed by nuclear events and so on are extremely slim. As was mentioned, most STBs, DTV converters, and even HD televisions themselves are powered by Linux, which, again as mentioned, is all but impervious to viruses. When new software is installed on a Linux-based computer, the system always asks for the user's password before initiating the software download; these systems do not allow anything to be downloaded without a password, so, again, the chances of malicious software (malware) being downloaded to a Linux-based system are slim to nonexsistent. This system was incorporated into Linux for just that reason: to prevent rogue software from being downloaded and installed. A recent episode of the NBC-TV series "Chicago Med", in which the hospital's entire computer system was shut down by a rogue virus, was probably based on just such a worst case scenario, and may well have been where VK member Centralradio got the idea for his comments.
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Jeff, WB8NHV Collecting, restoring and enjoying vintage Zenith radios since 2002 Zenith. Gone, but not forgotten. Last edited by Jeffhs; 12-18-2017 at 09:37 AM. Reason: Revision to text |
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Last edited by andy; 11-18-2021 at 05:03 PM. |
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