Friday, May 30, 2014

about LED or Plasma TV?




John Paul


I'm thinking of getting a samsung tv 46"... problem is which should i get? LED or Plasma? I heard plasma tvs doesnt survive that long is that true? Which should i get? Id like to watch movies on a 1080p and play ps3 games too.


Answer
Brands that I like the most and probably from best to least:
- (Top brands) Panasonic, Samsung, LG, Sony, and (Top off brands) Vizio, Toshiba, Phillips.
- When you buy a tv, don't forget to check if it has all the inputs and outputs (ports) you will need and make sure it's rated good (top model). There are smart tv's too, which has internet features and may many other features too.

Plasma >=< LED > LCD (LED is the same, but a upgrade from a LCD).
- Best picture quality = Plasma and Best audio quality = Plasma.
- Best energy consumption and environment friendly = LED and Best reliability = LED.
- (Newer plasma tv's fixed their burn in and use little less energy which means they can last longer too and a little better for bright rooms, the way plasma tv's are designed have no motion blur problems and plasma's are good for dark rooms).
- (Newer led's use motion interpolation frames to up the frame rate of a video to fix motion blur, but can cause the soap opera effect, led's are good for bright rooms).

1920x1080 resolution or higher resolution is good (1920*1080=2,073,600 pixels).
- 1080 resolution is better than 720 resolution.
- Bigger tv's are better with 1080 than 720 (If the tv is around 32 inches or less I would go with 720, any bigger I would just want a 1080 especially for tv's that are over 42 inches).
- Farther you sit away from the tv means it's better to go with 1080 than 720 (If you watch more than 6 feet away from your tv, then I definitely would go with 1080).

Progressive scan > interlaced scan.
- Progressive scanning is a way of displaying, storing, or transmitting moving images in which all the lines of each frame are drawn at the same time.
- Interlaced scanning is a way of displaying, storing, or transmitting moving images in which all the odd lines of a frame is displayed first then all the even lines of a frame is displayed second.
- Example: 1080p > 1080i or 720p > 720i or Example: 1080i > 720p (because more resolution is better for slower passed videos) or 720p > 1080i (because fast pass videos you be better off with progressive scan).

FPS = frames per second (of a video).
- Frame rate is how many individual images are displayed in a second. Think of a video as a fast moving flip book.
- NTSC tv broadcasting countries use 30p or 60i fps. or PAL tv broadcasting countries use 24p/25p or 50i fps. Movies for most/all countries use the same fps as PAL countries, movies are soon to be up to 48p fps.

Hz = refresh rate (of a tv).
- Example: A tv with a 120hz refresh rate, meaning it refreshes the entire tv screen 120 times a second. Read the below on how the fps of a video works with the refresh rate of a tv.

- Many tv's allow viewers to use motion interpolation frames and they are what cause the soap opera effect by creating more fake frames (higher fps) in between the real frames to match the refresh rate of a tv.
- The soap opera effect is when the video looks too life like due the really high frame rates and sceneries may look fake looking.
- Names of motion enhancement technologies: http://en.wikipedia.org/wiki/Motion_interpolation

- Many tv's allow viewers to turn off interpolation and force the television to repeat the same frame a number of times to match the refresh rate of a tv.
- Example: To display 24 frames per second on a tv with a 120hz refresh rate, each frame is repeated 5 times every 24th of a second.

But what happens if the fps of a video does not divide into the refresh rate of a tv equally? = Then you get a a pulldown.
- A pulldown is what causes a jittery screen also known as judder and that's because it repeats the odd frames a different number of times it repeats the even frames of a video. The ratio of the pulldown will depend on the refresh rate of the tv.
- Example: A 3:2 pulldown is most popular because it is needed to match a 24p fps of a video with a 60 hz refresh rate of a tv. = 12 odd frames times 3 is 36 frames and 12 even frames times 2 is 24 frames and 36 frames plus 24 frames = 60 frames for a 60 hz refresh rate of a tv.

What happens if those fps into hz vendor processions cause lag when your playing a video game on a bad tv?
- Game mode turns off the vendor processors which are what can cause lag when your playing video games, but that means the refresh rate will match the fps of a video which means you then might get motion blur because of the really low refresh rate the tv is running at.

I am still new to 3d tv's and I have to get into them.
- All I can say for now is I only like 3d for very slow moving scenes. When most movies start using a higher fps (EX: Lotr-hobbit with 48 fps), 3d will look better and less blurry during face pass scenes.

I am not really a fan of projectors either and I have to get into them before I like them.

is toshiba best for led tv?




Azhar





Answer
Brands that I like the most and probably best from least: Samsung, Panasonic, LG, Sony, Toshiba, Phillips.

Plasma >=< LED > LCD (LED is like the same/upgrade as LCD, so you should never go with LCD).
- Picture quality = Plasmas are better for picture quality (dark rooms and better dark pictures/video) and viewing experience with little to none motion blur (plasma for big tv's). (LED are better for tv's around 32 inches or smaller/small tv's for bright rooms and for bright pictures/videos).
- Sound quality = Plasmas are better, but LED is ok too,
- Appearance = I like plasma glass, but LED is nice too.
- Energy consumption = LED's are better (LED's are extremely economical).
- Reliable = LED's are only easier to take care of so I guess they are better.
- Price = Both are about the same price and it's up to you to decide if you want a plasma or LED.

Is 1080 good? Yes.
- 1080 resolution is better than 720 resolution.
- Bigger tv's are better with 1080 than 720 and farther you sit away from tv's means it's better to go with 1080 than 720 (If the tv is around 32 inches I would go with 720, any bigger I would just want a 1080 especially for tv's that are over 42 inches).
- Progressive scan is better than interlaced scan.
- Example: 1080p > 1080i
- Example: 720p > 720i
- Example: 1080i > 720p (because more resolution for slower pass videos).
- Example: 720p > 1080i (because fast pass videos you be better off with progressive scan).

Is 60hz good? = No.
- You want at least 120hz for your tv to play your videos.

Hz is the refresh rate. (Some tv's have a choice what hz you can set it at).
- It's an HD TV-set running at 60Hz - meaning it refreshes the entire screen 60 times a second.
- It's an HD TV-set running at 120Hz - meaning it refreshes the entire screen 120 times a second.

FPS = frames per second.
- NTSC countries use 60hz = 30 fps.
- PAL countries use 50hz = 24/25 fps.
(For not equal conversions there is more math to it, and there is 3:2 or 2:3 pulldowns that I will not explain).

For NTSC countries:
- To display 30 frames per second on a TV with a 60 hz refresh rate, each frame is repeated 2 times every 30th of a second.
- To display 30 frames per second on a TV with a 120 hz refresh rate, each frame is repeated 4 times every 30th of a second.

For PAL countries (you don't want a tv with 60hz because that includes more math and bad effects).
- To display 25 frames per second on a TV with a 50 hz refresh rate (PAL Countries), each frame is repeated 2 times every 25th of a second.
- To display 24 frames per second on a TV with a 72hz refresh rate, each frame is repeated 3 times every 24th of a second.
- To display 25 frames per second on a TV with a 100 hz refresh rate (PAL Countries), each frame is repeated 4 times every 25th of a second.
- To display 24 frames per second on a TV with a 120hz refresh rate, each frame is repeated 5 times every 24th of a second.
.ect

(If your playing a video with a different fps, then there is different math, I used progressive scan math btw).

The hobbit (1 out of 3): An unexpecting Journey: (Prequel to lord of the rings): is one of the first movies to change from 24 fps to 48 fps (or 30 fps to 60 fps). We may see more movies do this.

I am still new to 3d tv's, ill have to get into them as well.




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