1080p VOD clarification

teneightyp

SatelliteGuys Pro
Original poster
Mar 16, 2008
233
1
Duluth, MN
Could someone please clarify exactly which format DISH supports for the 1080p VOD. Please use hz and fps precisely. Is it 1080p 25 fps 60hz? Thanks! Go Adrian Peterson and the VIKES!
 
The hertz (symbol: Hz) is a measure of [ame="http://en.wikipedia.org/wiki/Frequency"]Frequency - Wikipedia, the free encyclopedia@@AMEPARAM@@/wiki/File:Sine_waves_different_frequencies.svg" class="image"><img alt="" src="http://upload.wikimedia.org/wikipedia/commons/thumb/6/6d/Sine_waves_different_frequencies.svg/360px-Sine_waves_different_frequencies.svg.png"@@AMEPARAM@@commons/thumb/6/6d/Sine_waves_different_frequencies.svg/360px-Sine_waves_different_frequencies.svg.png[/ame] per unit of time, or the number of [ame="http://en.wikipedia.org/wiki/List_of_cycles"]List of cycles - Wikipedia, the free encyclopedia[/ame] per [ame="http://en.wikipedia.org/wiki/Second"]Second - Wikipedia, the free encyclopedia@@AMEPARAM@@/wiki/File:Wooden_hourglass_3.jpg" class="image"><img alt="Wooden hourglass 3.jpg" src="http://upload.wikimedia.org/wikipedia/commons/thumb/7/70/Wooden_hourglass_3.jpg/76px-Wooden_hourglass_3.jpg"@@AMEPARAM@@commons/thumb/7/70/Wooden_hourglass_3.jpg/76px-Wooden_hourglass_3.jpg[/ame].

As you can see I am far from a genius. I was thinking fps and hz were different. So now my question is why is this the format supported. Isn't 60fps(hz) higher quality? If my TV supports 60hz why can't it downgrade to 24hz? Thanks!
 
Think of it this way: one frame = one cycle.

24fps is supported because that is the frame rate of theatrical film.

More frames = more data. More data = more bandwidth. More bandwidth = less revenue generating programming.

Regarding your TV's inability to handle 24fps, this probably stems from using conversion circuitry that wasn't designed to do its thing on a 24fps source. They chose to chase after what was easy and avoided the hard stuff that was often being handled by the source player (upconverting DVD player).

In case you were wondering converting from 24fps to 30fps is nasty business. Less so converting to 60fps, but you couldn't assume that all HDTVs could handle a 60Hz input.
 
...So now my question is why is this the format supported...
E* actually did something right for once.... It's all about keeping the original framerate. Films (and some Tv shows) are shot with movie cameras at 24 frames per second. The latest fad is to have a Tv that can accept a signal at 24fps and display it at a multiple of that 48/72/120Hz so that there is no conversion to 60Hz. It's the conversion that creates an occasional stutter in the picture on 60Hz fixed pixel displays (lcd/dlp/plasma).
 
In the ATSC table, there is no such thing as 1080 60p. That doesn't mean it couldn't exist outside of the OTA world. It takes up a huge amount of space, and could not fit in the OTA bandwidth of 6 MHz, at least not without using MPEG-4, which is also not part of the ATSC OTA standard. Blu-ray discs are mastered at 24fps, and look best on TVs supporting 24/120 etc, but will display on TVs fixed at 60.

Also, TV screen refresh rates do not have to be the same as the original capture frame rates. But it's nicer if they are, or are an integer multiple.

ATSC DTV Formats (18)

Vert-lines....Pixels........Aspect Ratio........Picture Rate
...1080........1920..............16:9.............60I...30P...24P
....720........1280..............16:9.............60P...30P...24P
....480.........704..........16:9 & 4:3.........60P...60I...30P...24P
....480.........640...............4:3...............60P...60I...30P...24P

Previously we had channels 2-83
In 2004 we had channels 2-69
After conversion, we will have channels 2-51
 
24 fps is the original format, it is converted by the provider to an HD signal format Dish equipment and TVs can handle. Usually 1080i 60hz or sometimes 720p 60hz. Dish receivers can also down convert to lower signal formats for older TVs. Dish recently added one movie per month in the 1080p 24hz signal format. Many newer TVs can accept this signal and convert it to their native display format. If your TV's display frequency is 120hz, then a very accurate conversion is possible from the 24hz and you should see the original 24fps frame rate on the TV without studder or interlacing artifacts.

When you select "rent" on a 1080p VOD, the receiver outputs the confirmation screen in 1080p 24hz format for 15 seconds to test your TV. If you don't see this and thus don't accept, the time expires and the "rent in lower resolution" confirmation screen in the receiver's normal resolution is shown instead.
 
HDV

If you're referring to the power source of the camera, OK, but that's irrelevant and unrelated to the frame rate of what is being filmed. It's like saying everyone in the US has a 60hz TV.

I'm referring to shooting HD Video. Which shoots 24fps @ 60 hz or in 50 hz areas shoots at 25fps. Here's a sentence pulled from the info about HDV to relate to the statement.
HDV camcorders, capable of 1080p video, record progressive video at rates of 24 fps (actually 23.98 fps) and 30 fps (actually 29.97 fps) for 60 Hz markets, and at 25 fps rate for 50 Hz markets.
 
It's really confusing when you bring in the A/C power supply frequency for no good reason, as people will mistake it for having something to do with the refresh rate of a display. Isn't anyone capable of receiving Dish on on a 60Hz system?
 
I'm referring to shooting HD Video. Which shoots 24fps @ 60 hz or in 50 hz areas shoots at 25fps. Here's a sentence pulled from the info about HDV to relate to the statement.
HDV camcorders, capable of 1080p video, record progressive video at rates of 24 fps (actually 23.98 fps) and 30 fps (actually 29.97 fps) for 60 Hz markets, and at 25 fps rate for 50 Hz markets.


24fps @ 60hz is much different than saying 24fps in countries/markets whose power is 60hz. Like BuddyBoy stated, all you did was add confusion, and I was just trying to clear that up.
 
Well Excuse me

Well Excuse Me for noting the fact that it is shot differently here at 60Hz than it is in 50Hz markets. Really when it comes to being shot there is more of it shot on HDV than film now. So it seems related to the frequency at which it is encoded to Video. No, as far as anyone that has 60 Hz only equipment Unless it is a multiple of 24 on refresh rate then it is not going to work. Most of the sets that display 24fps are using what is know as 2:3 pulldown to do the job. Some better than others & some pretty badly.
 
Well Excuse Me for noting the fact that it is shot differently here at 60Hz than it is in 50Hz markets. Really when it comes to being shot there is more of it shot on HDV than film now. So it seems related to the frequency at which it is encoded to Video. No, as far as anyone that has 60 Hz only equipment Unless it is a multiple of 24 on refresh rate then it is not going to work. Most of the sets that display 24fps are using what is know as 2:3 pulldown to do the job. Some better than others & some pretty badly.

I will agree you bring up an interesting point, but confusing to most (US) people here.

Dish uses 1080p24 for VOD, is that a global thing? Do other countries have different hardware to deal with 50hz? And what does Dish do for 1080p VOD for them?
 
Dish distributes satellite programming of various kinds all around the world.

I doubt they provide much HD any place but here.

Europe is just beginning the switch to digital TV and Japan has had HD for sometime, but I believe it is analog.
 

Today will be a test of how well Dish is in a snow storm

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