1080p and 1080i

[bradyreichert]

whats the difference?

my plasma plays 1080i and all my titles look great.

is 1080p just a grade higher then 1080i.

and is 1080i a grade higher then 720?

[HDTV1080P]

Originally Posted by bradyreichert

whats the difference?

my plasma plays 1080i and all my titles look great.

is 1080p just a grade higher then 1080i.

and is 1080i a grade higher then 720?

Both 1080I and 1080P signals have the same amount of resolution 1920 X 1080 (over 2 million pixels). Progressive scan is better then interlace. BLU-RAY is the best looking consumer source on the market that offers 1080P/24 native movies. Broadcast, satellite, and cable HD programming are all 1080I and 720P. Every consumer HD service is at reduced quality and at lower bit rates compared to BLU-RAY. 720P is 1280 X 720P quality (one million pixels).


Here is the order of quality with 1080P being the highest.

• 1080P HD
• 1080I HD
• 720P HD
• 480P Standard Definition
• 480I Standard Definition and also the native format of DVD movies.

Your Plasma most likely is a 720P model that accepts 1080I signals and down converts them to 720P quality.

[usckid]

Originally Posted by HDTV1080P

Both 1080I and 1080P signals have the same amount of resolution 1920 X 1080 (over 2 million pixels). Progressive scan is better then interlace. BLU-RAY is the best looking consumer source on the market that offers 1080P/24 native movies. Broadcast, satellite, and cable HD programming are all 1080I and 720P. Every consumer HD service is at reduced quality and at lower bit rates compared to BLU-RAY. 720P is 1280 X 720P quality (one million pixels).


Here is the order of quality with 1080P being the highest.

• 1080P HD
• 1080I HD
• 720P HD
• 480P Standard Definition
• 480I Standard Definition and also the native format of DVD movies.

Your Plasma most likely is a 720P model that accepts 1080I signals and down converts them to 720P quality.

Sorry, but that just sounded like a blu ray infomercial.

[themiz69]

yea i dont know excatly where that came from!

[bradyreichert]

how would you know if my plasma is only 720p?

[HDTV1080P]

Originally Posted by bradyreichert

how would you know if my plasma is only 720p?

Flat panels come in 720P and 1080P. Flat panels are all progressive scan. Older CRT screens use 1080I at around 1380 X 1080. A flat panel LCD or Plasma will take a 1080I signal and either down convert it to 720P or de-interlace the signal and upconvert it to 1080P.
So far no one is broadcasting in 1080P yet and might not do so for several years. BLU-RAY’s look much better then any 1080I satellite or cable 1080I signal that I have every seen.

[SLARITY]

I just dont like how you put 1080i above 720p. It really depends on what your watching. Thought thats why all sports are broadcast in 720p because motion is more fluid where 1080i has higher resolution so it looks better in more still situations.

[HDTV1080P]

Originally Posted by SLARITY

I just dont like how you put 1080i above 720p. It really depends on what your watching. Thought thats why all sports are broadcast in 720p because motion is more fluid where 1080i has higher resolution so it looks better in more still situations.

1080 interlace has more resolution then 720P and for old discountined formats like D-VHS the studios decided to release all movies in 1080I including fast action movies. Yes some people prefer 720P over 1080I when it comes to sports since progressive is better for fast moving motion. Now with 1080P one can have the best of both formats when watching future BLU-RAY sports discs. Perhaps someday Verizon FIOS will offer sports in 1080P since they have plenty of bandwidth to do so.

[STR8UP&DOWN]

Originally Posted by HDTV1080P

1080 interlace has more resolution then 720P and for old discountined formats like D-VHS the studios decided to release all movies in 1080I including fast action movies. Yes some people prefer 720P over 1080I when it comes to sports since progressive is better for fast moving motion. Now with 1080P one can have the best of both formats when watching future BLU-RAY sports discs. Perhaps someday Verizon FIOS will offer sports in 1080P since they have plenty of bandwidth to do so.

My tv is a 50" 720p. I keep my inputs (cable box & PS3) set to 1080i. When watching sports, should I switch the cable box to 720p? I know my tv will only give me 720p anyway, so is there any difference?

[HDTV1080P]

Originally Posted by STR8UP&DOWN

My tv is a 50" 720p. I keep my inputs (cable box & PS3) set to 1080i. When watching sports, should I switch the cable box to 720p? I know my tv will only give me 720p anyway, so is there any difference?

There might be a native setting on your cable box that allows the box to output 720P for 720P programs and 1080I for 1080I programs. Some sports are broadcast in 1080I while others are 720P (depends on the station).
If the cable channels you are watching are 720P then your cable box should be set for 720P (or native if there is a native option). If the cable channel you are watching is 1080I then either your cable box or TV needs to downconvert it to 720P. It all depends on which device has the better down convert when it comes to which well give you the best picture. Most TV’s have a info button on them or another type of option that brings up a small menu that tells you if the signal being received is 1920 X 1080 or 1280 X 720P, etc.

[STR8UP&DOWN]

Originally Posted by HDTV1080P

There might be a native setting on your cable box that allows the box to output 720P for 720P programs and 1080I for 1080I programs. Some sports are broadcast in 1080I while others are 720P (depends on the station).
If the cable channels you are watching are 720P then your cable box should be set for 720P (or native if there is a native option). If the cable channel you are watching is 1080I then either your cable box or TV needs to downconvert it to 720P. It all depends on which device has the better down convert when it comes to which well give you the best picture. Most TV’s have a info button on them or another type of option that brings up a small menu that tells you if the signal being received is 1920 X 1080 or 1280 X 720P, etc.

So since my tv is 720p, will 1080i source generally look better than 720p source? Is it best to keep my source settings at 1080i and let the tv downconvert?

[aaronwt]

There are 1080i Plasma sets. i think hitachi had the first one a couple of years ago before the 1080P sets were released. It had a resolution of 1024x1080i.

[pelenor]

Great video explaining the differences.

http://www.youtube.com/watch?v=Z-JXfyvlPh0

[HDTV1080P]

Originally Posted by aaronwt

There are 1080i Plasma sets. i think hitachi had the first one a couple of years ago before the 1080P sets were released. It had a resolution of 1024x1080i.

Do you happen to know the model number for the Hitachi? This would be interesting information since so far all the LCD and Plasma’s I have seen are progressive scan only. CRT’s are interlaced. It would be interesting to know if anyone every made an interlaced Plasma or LCD screen and if anyone every made a progressive CRT screen. The first 42 inch Plasma screen introduced in 1997 was progressive. I think the Hitachi display that had 1024 X 1080 might have been progressive.

[HDTV1080P]

Originally Posted by STR8UP&DOWN

So since my tv is 720p, will 1080i source generally look better than 720p source? Is it best to keep my source settings at 1080i and let the tv downconvert?

Since it sounds like your display is 1280 X 720 progressive then when watching 720P channels and sources always send 720P to the display. Yes you might get a better picture on your display if you input native 1080I channels in the 1080I format and allow your display to do the down convert to 720P versus your cable box doing the downconvert. 1080I channels will not give you any better picture quality then 720P if the same source material is used. So if you had two channels playing the same program and one was 720P and one was 1080I they would look both the same in theory (The 720P channel might look better since the TV does not need to do any conversion from 1080I to 720P). What I would do is place the cable box on native or 720P output. Native would output 1080I at 1080I and 720P at 720P.