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Guest Message by DevFuse

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Directv using 1080P/24 capable encoders


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29 replies to this topic

#21 OFFLINE   mtnsackett

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Posted 07 November 2008 - 10:37 PM

I have a hr20-100 and a Samsung LN-S4695D 46 in HDTV that supports 1080p @60 Hz but I can not get the 1080p on my reciever to work I get no signal to the tv when I try to add the 1080p in the resolutions menu. anyone know if my tv will not support the encoding from directv or is there something else I ned to try oh and I am using a Hdmi cable between them.

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#22 OFFLINE   eandras

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Posted 08 November 2008 - 09:00 AM

I have a hr20-100 and a Samsung LN-S4695D 46 in HDTV that supports 1080p @60 Hz but I can not get the 1080p on my reciever to work I get no signal to the tv when I try to add the 1080p in the resolutions menu. anyone know if my tv will not support the encoding from directv or is there something else I ned to try oh and I am using a Hdmi cable between them.



If your tv only does 1080P/60, 1080P/24 will not work. If you do get the resolution you will have a jittery (jumpnig motion ) picture and will get splash color screens that show were a scene would have been added for the 60 frames per second as there is nothing there.

To really check the ability of your tv you should contact the manufacturer of your tv.
"If to be right is to be different by all means be different"

#23 OFFLINE   smitmw1

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Posted 08 November 2008 - 10:54 AM

Everyone seems to be missing something here. Most regular HD channels on DirecTV are 1080i/60. 1080p/24 is actually less bandwidth than 1080i/60. So there's no real reason why DirecTv shouldn't broadcast 1080p/24 for MOVIES, which are from a 24fps source anyway. But the picture quality won't in general be any better than movies broadcast today in 1080i/60, because 1080p Tvs with decent technology are capable of reconsituting the original 1080p/24 signals from a 1080i/60 movie. Go and google "3:2 pulldown" if you want to know how this works.
Personally I don't know why there is all this fuss about 1080p/24, IMHO it's mainly a marketing thing rather than an advance in technology. Now if it were 1080p/60 that's another thing.....


You are leaving out the benefit of 1080p/24. Not all sets have a fixed 60hz refresh rate. If I send mine 24fps material it changes the refresh rate to 72hz, triples each frame thereby removing the telecine judder. Most of the 120hz capable sets 5x each frame for the same effect.
HR20-700(leased) & HR20-700(owned)
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#24 OFFLINE   scottchez

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Posted 08 November 2008 - 10:57 AM

Remember in the early days of HD it was the Discovery HD showcase? One of the few in HD.

What if they were they were the first to do 1080P on DirecTV as part of the extra HD package?

It would make the extra cost worth it.
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#25 OFFLINE   Jeremy W

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Posted 08 November 2008 - 01:13 PM

Personally I don't know why there is all this fuss about 1080p/24, IMHO it's mainly a marketing thing rather than an advance in technology. Now if it were 1080p/60 that's another thing.....

Bingo. People hear 1080p and they wet themselves, but it's really not that big of a deal at 24fps.

#26 OFFLINE   BattleZone

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Posted 08 November 2008 - 02:21 PM

I have a hr20-100 and a Samsung LN-S4695D 46 in HDTV that supports 1080p @60 Hz but I can not get the 1080p on my reciever to work I get no signal to the tv when I try to add the 1080p in the resolutions menu. anyone know if my tv will not support the encoding from directv or is there something else I ned to try oh and I am using a Hdmi cable between them.


Your TV does not support 1080/24p input signals, only 1080/60p, so while you get the progressive scan benefit from video sources (computers, game consoles, and other "video" content), it won't work for film content that is encoded at 24 frames per second (1080/24p). You can still order and watch these movies, but the receiver has to convert it into a format that your TV can accept, and that the chipset in the receiver can output, and the best common resolution is 1080/60i.

You will still get the benefits of the higher bitrate (i.e., less compression, so less macroblocking in difficult-to-compress scenes), but you won't get the full benefit that someone with a "multiple of 24" refresh rate TV could get.

#27 OFFLINE   mtnsackett

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Posted 08 November 2008 - 02:35 PM

well hopefuly D* will add support for the 1080p 60 Hz tvs soon. I would email them but I don't want just anther form letter stating thy don't know what I am talking about

#28 OFFLINE   Jeremy W

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Posted 08 November 2008 - 02:44 PM

well hopefuly D* will add support for the 1080p 60 Hz tvs soon.

The video chips can't support 1080p60, so the current receivers will never do it.

#29 OFFLINE   BattleZone

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Posted 08 November 2008 - 10:08 PM

well hopefuly D* will add support for the 1080p 60 Hz tvs soon. I would email them but I don't want just anther form letter stating thy don't know what I am talking about


Not only do the chips in the receiver not support it, but it wouldn't matter if they did, because film-based content is encoded at 24p anyway (film uses 24 frames per second). Film has ALWAYS had to be converted, with a 3:2 cadence, to be viewable on TV, which has always been 60 Hz.

It is only in the last two years that there have been TVs made that have the ability to show film content (24 frames per second, or 24p) with each frame being on the display for 1/24th of a second. And only higher-end TVs have had this capability. It requires a display panel and accompanying electronics to be able to refresh the screen at some multiple of 24. There are models with refresh rates of 48, 72, 96, and 120 Hz, depending on display technology. These are the sets that get the full benefit from film content.

The real issue is that TV manufacturers, who knew that 24p content was "coming" and would be important, still advertized 60p-only TVs as "1080p" without clarifying that they only did 1080/60p, and didn't also do 1080/24p.

#30 OFFLINE   gfrang

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Posted 09 November 2008 - 01:03 PM

The movie Seabiscuit,if it comes to blu-ray then i will make my mind on 24p.If your going to see a difference it will be there.




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