Encoding, bandwidth, oh my...

[Jimbo]

The Network is the ones that determine if it's 720p or 1080i NOT D*.

Think of D* as being the Provider, not the one that originates the shows you watch.

With the exception to the few channels that D* actually produces.

There is still NO 1080p programming out there from the Networks.
The only 1080p shows would be from places like Netflix and that type of outlet and thats very limited.

1080p is still very limited and we are now moving on to 4k witch is also very limited.
I doubt that 1080p will ever be sent out on network outlets and it will eventually move to 4k, possibly 8k.

 

[texasbrit]

"Still only" implies it might change. Not going to happen. DirecTV has some movies at 1080p/24 but movies are generally filmed at 24fps so going to 1080p/60 (typical resolution of an HDTV) gains you nothing. In fact 1080i contains all the info in the 1080p signal so 1080p is more of a marketing gimmick than anything else.

EDIT: see also Jimbo's post.

 

[trparky]

But doesn't 1080i use less bandwidth to encode something than 1080p?


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[raoul5788]

But doesn't 1080i use less bandwidth to encode something than 1080p?


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No.

 

[texasbrit]

No, the bandwidth at the same level of compression for 1080p/24 is LESS than 1080i/60, 1080i is the equivalent of 30 full frames per second, 1080p/24 is 24 full frames per second. If someone were delivering 1080p/60 that would certainly use more bandwidth. Even if your game console is delivering 1080p/60, much of the time it's really a 1080p/30 signal with frame doubling.
You will notice that 1080p/24 looks better quality than 1080i. That's because the provider is using less compression and is actually therefore using a higher bandwidth. That's also why a DirecTV 1080p/24 movie looks so good at 1080i, it's just a better quality signal.

 

[trparky]

So why do providers do 1080i and not 1080p?


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[texasbrit]

Probably because when the standards for HDTV were developed, people had CRT TVs which could not handle progressive signals. 1080p was not even an allowable resolution under the broadcast TV standards.