1080p vs 1080i

[epicstruggle]

is there a difference between 1080p30 vs 1080i60? Im researching a new tv and im getting a bit confused with the 3 standards and in particular the 2 1080's. Any feelings on which format will be king (between 720p, 1080i, or 1080p)?

epic

 

[Ty]

is there a difference between 1080p30 vs 1080i60? Im researching a new tv and im getting a bit confused with the 3 standards and in particular the 2 1080's. Any feelings on which format will be king (between 720p, 1080i, or 1080p)?

epic

The next "standard" for displays (total guess on my part) will likely be 1080p, mind you 720p is a likely stepping stone for awhile from broadcasts (networks like Fox).

But don't be fooled by simple specs. PQ is not merely a function of resolution.

 

[Leto]

1080 p/i

i = interlaced, lower bitrate required
p = progressive scan, high bitrate required. I heard 1080 p requires too much bitrate for it to be available over the air...

 

[Deepak]

p is better than i any given day.

 

[RussSchultz]

1080p/30 and 1080i/60 are equivalent in bitrate.

 

[London Geezer]

On kind-of-related news, SKY will start broadcasting in HD in 2006 in the UK!!!! YAYAYAY!!!! They ARE thinking about us hobbits!!!

 

[RussSchultz]

p is better than i any given day.

Not quite true. Interlace is better for sports (more temporal sampling), progressive is better for stills (single sampling point)

 

[London Geezer]

p is better than i any given day.

Not quite true. Interlace is better for sports (more temporal sampling), progressive is better for stills (single sampling point)

Sure about that? I thought p is always better than i, especially when movement is involved. Or at least that's what my eyes tell me.

 

[PC-Engine]

p is better than i...except on SONY televisions...

 

[London Geezer]

p is better than i...except on SONY televisions...

Is anything not worse on Sony stuff in your opinion?

 

[RussSchultz]

p is better than i any given day.

Not quite true. Interlace is better for sports (more temporal sampling), progressive is better for stills (single sampling point)

Sure about that? I thought p is always better than i, especially when movement is involved. Or at least that's what my eyes tell me.

If you want to capture the fast movement of something, do you want higher resolution? Or faster sampling?

 

[London Geezer]

If you want to capture the fast movement of something, do you want higher resolution? Or faster sampling?

Does 1080p always run at 30Hz??
I thought all HDTV resolutions ran at 60Hz. So at parity of refresh rate, p is always better than i....
but i'm sure i'm missinig something, so, back to u...

 

[epicstruggle]

If you want to capture the fast movement of something, do you want higher resolution? Or faster sampling?

thank you, makes more sense now.

epic

 

[PC-Engine]

Is anything not worse on Sony stuff in your opinion?

Industrial design for the most part...

 

[stevem]

p is better than i any given day.

Not always. If we take the case of a PAL DVD player outputting i/p to a PAL progressive/100Hz TV, in i mode the TV can use it's line doubler to output 100Hz flicker free whereas P mode results in 50Hz display which may be more irritating to some.

Interlace is better for sports

I disagree. 720p for sports is better than 1080i.

Edit:

If you want to capture the fast movement of something, do you want higher resolution? Or faster sampling?

Bingo!

 

[RussSchultz]

If you want to capture the fast movement of something, do you want higher resolution? Or faster sampling?

Does 1080p always run at 30Hz??
I thought all HDTV resolutions ran at 60Hz. So at parity of refresh rate, p is always better than i....
but i'm sure i'm missinig something, so, back to u...

An interlace frame is composed of two fields sampled at twice the rate.

So interlaced at 30 FRAMES per second is actually showing two half resolution fields at twice the rate.

So, given the choice between 1080p/30 or 1080i/30 (there actually is no 1080/60 progressive or interlaced), the interlaced version will resolve motion better, though the progressive one will have less artifacts..

720p has slightly less resolution, but comes in a 60hz flavor, which is why its better for sports than 1080i or p.

 

[Leto]

I didn't know you could see 60 hz TV in USA. Thats cool. Is that the standard for sports?

 

[London Geezer]

Oh i get it, i though that 1080 ran at 60Hz like 720 or any other resolution. My bad...

 

[RussSchultz]

I believe ABC broadcasts in 720p/60.

 

[Moloch]

How long before HD tv's are affordable?
i.e when can I get a good 35 incher in the us for under a grand?