So if OTA goes MPEG-4 does that mean that all these converter boxes and built in tuners in people's televisions will no longer be good?
It will be a long time coming. The change to MPEG-4 for broadcast TV (OTA) would require a change in the ATSC standard. Think how long it took to change from NTSC to ATSC.
There is no increase in bandwidth for 1080P/24 (i.e. movie based) or for 1080P/30. The only problem is that few of the providers are even experimenting with it and none are currently providing it regularly. Only increased bandwidth is for 1080p/60.
Speed of adoption at ATSC isn't a problem; the codec has been canonized already. ATSC (standards) - Wikipedia, the free encyclopedia Now it's a matter of telling everyone in the United States that the TV they just spent $700-$3500 on is just a big paperweight, because it can't decode H.264 streams.
Which isn't an (at this time) HD format. I do think 1080p does require extra bandwidth.
Interesting about the adoption. I'd missed that. However, the latter part of your post is the key. It will tend to freeze all action by fearful government agencies (politicians). Maybe they'll mandate incorporating it in all tuners for a few years before allowing MPEG-4 broadcasts. But it certainly makes sense to add it soon. Before OTA dwindles even more.
Frequent changes in the standard will annoy the heck out of people. I wonder how long before the successor to MPEG-4 raises it's head?
The next steps are still being tested before any changes can be made. The ATSC committee will have to decide as to which new standard will be the one that they are going to go to. I expect we will see them moving to 1440 p as well in those standards.
ATSC Table 3 Formats for DTV Transmission
Vert……….horz………aspect………fps/scan
1080………1920………16:9….....24p, 30p, 30i
720..………1280………16:9….....24p, 30p, 60p
480..……..…704………16:9….....24p, 30p, 30i, 60p
480..……..…704……….4:3.….....24p, 30p, 30i, 60p
480..……..…640……….4:3.….....24p, 30p, 30i, 60p
progressive 1080 * 1920 * 30 frames per second = 62,208,000
interlaced 1080 * 1920 * 30 fields per second (15 frames per second) = 31,104,000
progressive 720 * 1280 * 60 frames per second = 55,296,000
1080 60p is no doubt the holy grail, but would require twice the bandwidth and while it might be supportable by MPEG-4 OTA, I doubt we'll see it in the foreseeable future. All the collection, transporting and editing equipment would need replacement. Is there a 1080 60p camera in general use today? Never mind the rest of the requirements.
The 1920X1080 should read 60i/30p/24p There is no 60p 1080 format under the current standards. There also is no requirement for HD, just digital.....
The 1920X1080 should read 60i/30p/24p There is no 60p 1080 format under the current standards. There also is no requirement for HD, just digital. It is in providers best interest to utilize their bandwidth as prudently as possible.
i have the same tv..I recently got a 73" 1080p TV and realize the artifacts in the compressed 1080i on Dish. It still looks great overall but I would love to see all the HD shows in 1080p.
Forgive me if this is a dumb question, but does anyone know if OTA in Japan is 1080p? The reason I ask is that I have always heard that Japan had HDTV for a few years now, but I never knew any of the details.
Thanks,
Ghpr13
Which isn't an (at this time) HD format. I do think 1080p does require extra bandwidth.
Yep, which pretty much means that OTA will never go MPEG-4.So if OTA goes MPEG-4 does that mean that all these converter boxes and built in tuners in people's televisions will no longer be good?
ATSC Table 3 Formats for DTV Transmission
Vert……….horz………aspect………fps/scan
1080………1920………16:9….....24p, 30p, 30i
720..………1280………16:9….....24p, 30p, 60p
480..……..…704………16:9….....24p, 30p, 30i, 60p
480..……..…704……….4:3.….....24p, 30p, 30i, 60p
480..……..…640……….4:3.….....24p, 30p, 30i, 60p
progressive 1080 * 1920 * 30 frames per second = 62,208,000
interlaced 1080 * 1920 * 30 fields per second (15 frames per second) = 31,104,000
progressive 720 * 1280 * 60 frames per second = 55,296,000
1080 60p is no doubt the holy grail, but would require twice the bandwidth and while it might be supportable by MPEG-4 OTA, I doubt we'll see it in the foreseeable future. All the collection, transporting and editing equipment would need replacement. Is there a 1080 60p camera in general use today? Never mind the rest of the requirements.
I basically agree, but I won't say never. I just cannot see OTA going Mpeg-4 anytime soon. Neither the networks nor the consumer is ready to start investing in new equipment and scraping their old -- not after having done it so recently for the digital transition.Yep, which pretty much means that OTA will never go MPEG-4.
1080p/30 can use slightly less bandwidth than 1080i because of compression efficiencies with a progressive picture (otherwise 1080p/30 and1080i/30 will use the same amount of bandwidth).
Remember CRT based Tv's? Interlace has essentially been the standard for a long time. And if based on interlace scanning cameras the image is a bit smoother then a 30p picture. Obviously interlacing introduces its on problems.One wonders why 1080i/30 exists at all.
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