Pure Sine Wave Inverter,Off-Grid Pure Sine Wave Solar Inverter,Power Inverter For Solar System,Pure Sine Wave Pv Inverter Zhejiang Kaimin Electric Co., Ltd. , http://www.ckmineinverter.com You may ask, what is the aspect ratio? The aspect ratio is the ratio of the width of the screen to the height. Essentially, it describes the aspect ratio of a rectangle. Currently, the most popular aspect ratio in video display for consumer electronics is 16:9, which is the standard HDTV format. This number means that every 9 units of the height of the picture corresponds to 16 units in width.
Sometimes you will see a 16:9 aspect ratio written as 1.78:1, or just 1.78. why? Because 16 is divided by 9 equals 1.78. The two descriptions are the same thing. A 1.78 screen is the height of each unit corresponding to a width of 1.78 units.
If you use a high-definition flat-panel TV as your home theater display, you can only use the 16:9 format anyway. Although flat-panel TVs come in a variety of sizes, all are 16:9 aspect ratios. But if you plan to use a projector plus a screen to build a cinema video system, you have another option, 2.4:1, which is commonly referred to as the ultra-widescreen format. This is a wider format than the standard 16:9 format. Many people prefer it because it matches the aspect ratio of a large number of currently produced movies.
Consideration of the black side
There is a simple fact: TV and movies are filmed in a variety of different aspect ratios, and there is no uniform standard. So no matter what aspect ratio of your screen, for some programs there will always be black and white in the up and down direction, and for other programs there will be black and white on the left and right sides. The only thing that doesn't have black borders is when you're watching a TV or movie in your screen aspect ratio format—either a 1.78 movie on a 16:9 screen or a 2.4-camera movie. Displayed on a 2.4 super wide screen. In both cases, the screen frame will closely match the picture, with no black edges.
(By the way, we assume that you want to watch the show with the correct original aspect ratio, which is how the director makes the show. If not, there are several ways to extend, manipulate, or crop the video image so that it fills in Filled with a 16:9 screen and eliminates black edges.)
So, when choosing a screen aspect ratio of 1.78 or 2.4, you are actually deciding how different movie and TV formats will appear on your screen. For example, if you choose a 16:9 screen, all 2.4 format movies will have black borders in the up and down direction of the screen. If you choose a 2.4 screen, all 16:9 shows will be sandwiched between the left and right sides of the screen.
As a result, 16:9 is the best match for HDTV broadcasts, and the 2.4 super widescreen is perfect for movies. Is that true?
Well, don't worry. Many people think that all modern movies are made in the ultra-widescreen 2.4 format. This is actually not the case. There are quite a few movies, including some of the latest and most popular movies, produced in the 16:9 (1.78) format. For example, the following movies were either made at 1.78 or modified to 1.78 for Blu-ray:
Avatar
Alice in Wonderland
"The Hurt Locker"
"godfather"
Godfather II
Shining
The Blade Runner (1.66)
"Finding Nemo"
"Toy Story"
"Flying House Tour"
Beauty and the Beast
Little Mermaid
Clockwork Orange
Charlie and the Chocolate Factory
"Tanggan Assassination Order"
Earth Pulse
"Michael Jackson: That's It"
However, with the exception of some movies, all HDTV broadcasts are produced in 1.78 format, and many live Blu-ray discs are also 1.78. Once you have a 1080p home theater, many people will want to experience the concert in high-definition format on the big screen. Some of the 1.78 format concert Blu-ray discs have:
Roy Orbison, Black & White Night
BB King Live at Montreaux
Eric Clapton/Steve Winwood
Diana Krall Live in Rio
Chicago/Earth, Wind & Fire
Elton 60
In addition to 1.78, there is 1.85
Another aspect ratio that is very close to 1.78 is 1.85. This format has been popular for a long time, so there are a large number of 1.85 movies on the market. Examples of movies made with 1.85 are as follows:
"Saving Private Ryan"
"Woman fragrance"
"Good Will Hunting"
"rain Man"
Murder Green Toe
"Ice Blood Storm"
"The Silence of the Lambs"
Jurassic Park
"Edward Scissorhands"
"back to the Future"
"Shrek" and "Shrek 2"
"Dead Poets Society"
Dangerous Industry
My cousin, Pooh
Big trial
"Sleepless in Seattle"
"pretty Woman"
"Life Wine Cup"
"Rising Sun"
"Ice Age"
"Sherlock Holmes"
"list of last wish"
"Mr. Cats"
Lost in Tokyo
"Note: I love you"
Wedding Singer
"Monsters, Inc"
"ninth District"
Sex and the City
"Good guy"
Exorcist
"weakness"
"The Shawshank Redemption"
Rocky
Angry Bulls
French Drug Trafficking Network
North-northwest
"The Cry"
"Ecstasy"
Chicago
"beautiful Mind"
"conflict"
Good Morning Vietnam
Twelve King Kong
Not only a large number of Blu-ray movies are in the 1.85 format, but also in live concerts. Some examples include:
Eagles Farewell 1 Tour
Diana Krall Live in Paris
Led Zepellin
Willie Nelson/Wynton Marsalis play Ray Charles
So the bottom line is that when you're planning a home theater, you should expect that in addition to the wider 2.4 format, you'll watch a significant amount of TV and movie content in 1.78 or 1.85 format.
How to project a 1.85 movie onto the 1.78 screen?
There are two ways to watch a 1.85 show on a 1.78 screen. The first option is to set the projector's lens to fit the 1.78 image into the 1.78 screen. With this method set, all 1.85 movies will be displayed on the screen with a very thin black border in the up and down direction. On a 120-inch diagonal screen, the width of the black border is approximately one inch (2.54 cm) above and below. Many people think that this method is no problem, so they insist on this setting so that the 1.78 program fits perfectly on the screen.
An alternative is to set the projector's lens to put the 1.85 movie completely into the screen at height. After doing this, you will let the picture cross the range of the screen frame. The small black side will fall on the upper and lower parts of the black frame of the screen, which is good, but you will lose a little bit on the left and right sides of the screen. At the same time, 1.78 shows will exceed the range of the screen frame in all four directions. But if you can tolerate this small degree of edge cropping, you will eventually be able to cast all 1.78 and 1.85 shows without black borders onto the screen. For the 1.85 show you will lose 2% of the image on both sides, and for the 1.78 show you will lose 2% of the image in all four directions. For those 1.78 shows that you have to enjoy in 100% full-frame, you can adjust the zoom lens of the projector and reduce the image so that it is fully projected onto the screen. For many people, this is an acceptable compromise.
In addition, if you are interested in this idea of ​​enduring tiny edges and avoiding the tiny black edges of 1.85, then a better alternative is to make your screen 1.85 instead of 1.78. In this way, all 1.85 movies can be perfectly projected onto the screen, without those small black edges. At the same time, the 1.78 program will slightly exceed the edge of the screen in the upper and lower directions, but will remain visible on both sides. On a 120-inch diagonal screen, about one inch (2.54 cm) above and below the screen will fall on the black and black parts of the screen - the sacrifice is not too big. Occasionally, when you absolutely need to view the entire 1.78 image, you can slightly adjust the zoom of the projector to reduce the image size, creating small black edges on the left and right sides. This setup eliminates the black border and image cropping of the 1.85 format and limits the cropping of the 1.78 format to the top and bottom, rather than all four directions.
Which solution is better depends on which format you see the most. If you want to watch a lot of HDTV broadcast content, you will most likely want to enjoy it with a full-frame image frame. If the black side of the 1.85 format is not a problem, then the 1.78 format screen would be the best choice. If you don't watch TV very much, and your main goal is to watch a lossless 1.85 full-frame movie, then the 1.85 format screen would be a better choice, at least for the two very similar formats.
So, what about the 2.4 format movie?
Obviously, most of today's movies are made in a wider format, the 2.4 ultra-widescreen format. The second part of the article will focus on the display of 2.4 format movies, as well as the selection of the 2.4 format screen instead of the traditional 16:9 screen.
Part 2: Options for Ultra Wide Screen 2.4 We have just reviewed the list of some movies made in 1.78 and 1.85 format. However, many movies are produced in a wider 2.4 format. Although most of them are feature films or action-adventure movies rather than romantic comedies, there are various types of 2.4 format movies. For example, the following movies were taken in 2.4 format:
Lord of the Rings
"Pirates of the Caribbean"
Berne's Identity
"How to Train Your Dragon"
"instinct"
"Luocheng Confidential"
Infernal Affairs
Transformers
Robin Hood
"iron Man"
Batman Prequel 2: Dark Knight
"Star Trek"
"shameless bastard"
Ratatouille (Pixar)
Cars (Pixar)
"Love Notebook"
"007 Royal Casino"
"007 Quantum Crisis"
"Batman Prequel 1: The Mystery of the Shadows"
"Gladiator"
Black Hawk Fall
Flying Home
"The Matrix"
Magic Labyrinth
Terminator 2
Apollo 13
Cosmic Veyron
"brave Heart"
American Beauty
Moulin Rouge
If you want to watch these movies on a 16:9 screen, you will see a larger black border above and below the image. On a 120-inch diagonal screen, the image has a height of 1.50 meters and a width of 2.67 meters. When a 2.4-format movie is displayed on the screen, there will be a black border of 19.3 cm above and below the image. This is enough for many people to abandon the 16:9 format and choose the 2.4 format screen. (By the way, if you end up with a 1.85 format screen instead of the traditional 16:9, then the black side of the 2.4 program will be reduced by about an inch or 2.54 cm, which is another small advantage of the 1.85 variant.)
All 2.4 format movies are perfectly filled with 2.4 screens without any black borders. But occasionally you will also encounter variants of the 2.4 format. Some movies such as "The Battle of the Tank", "Guihe Bridge", "Uncle Long Legs" are made in 2.55 format, they will have small black edges in the up and down direction on the 2.4 screen. Movies such as General Patton and South Pacific are made in 2.20 format, and they have black borders on the left and right sides of the 2.4 screen.
However, these strangely formatted movies are only exceptions rather than universal ones. Basically, most of the widescreen shows you can show on the screen will be one of the 1.78, 1.85, or 2.4 formats. Therefore, your choice of screen format depends in part on the type of show you watch most often and how you want to manage the black border. For example, the Fifth Element is made in 2.4 format, and if you cast it onto a 2.4 screen, it will look like this:
At the same time, when you project a 1.85 movie onto a 2.4 screen, the picture size will be reduced and there will be black edges on the left and right sides. The movie "Chicago" is a good example. Here's what a scene from Chicago looks like on the same 2.4 format screen:
By the way, there are still a large number of 4:3 format programs available for viewing. Traditional (non-HD) TV series DVDs such as "Friends" and "Big Doctors" are 4:3, and there are also many classic movies made before 1953. All 4:3 images will be placed in the center of the 2.4 screen, with wide black edges on the left and right sides. Here's a scene from Gone with the Wind (set by the Film Academy's aspect ratio of 1.375:1, close to 4:3) on a 2.4 screen:
2.4 format aesthetic appeal
One reason people like the 2.4 format is that it has a more dramatic effect than the standard 16:9 widescreen. If you are watching a standard 16:9 picture and then switch to a wider 2.4 image, it will look bigger and more impressive than the traditional 16:9 image. It should be noted that this switching is either done by the movement of the projector's zoom lens or by an external anamorphic lens (a very expensive alternative).
In addition, many people think that 2.4 format movies are the most important and/or the format they most often watch. Therefore, they hope to enjoy the full-frame frame without black borders.
2.4 format screen problem
Although the 2.4 format screen is an exciting topic for many people, it has a big drawback, which we will discuss in the third part of the article.
Part III: The problem with the ultra-widescreen 2.4 format At first glance, the concept of the Super Widescreen 2.4 format has a lot of appeal. And if you're going to mainly watch movies in 2.4 format, then it's a good alternative. However, it has a big problem: in most home theater rooms, a 2.4 aspect ratio screen is the smallest screen you can install. Your 16:9 and 4:3 images will be much smaller than they are on a 16:9 screen. why? In most home theater conditions, the size of the room limits the width of the screen much more than the height of the screen.
Let us assume that the wall width you are using for projection is 14 feet (4.27 meters) and the height is 9 feet (2.75 meters). Suppose you want to leave two feet (0.71 m) on each side of the screen to the side walls for speaker and aesthetic considerations. In fact, this room layout limits your maximum screen width to approximately 10 feet (3.05 meters).
Now, given the room's height of 2.75 meters, there is almost no limit to the height of the screen. If you choose 2.4 screen, it will be 3.05 meters long and 1.30 meters high. And if you choose a 16:9 screen, it will be 3.05 meters long and 1.71 meters high. (In theory, if you build an old theater for a movie before 1953, you can install a 4:3 screen with a width of 3.05 meters and a height of 2.29 meters.) The key point is the size of the room versus the screen width. The limit is far greater than the height limit. Believe it or not, but for most home theater spaces, the 2.4 format is actually the smallest screen you can install from a total area perspective.
Now, on a 3.05 meter wide 2.4 format screen, all the images you project have the same height, which is 1.30 meters. This is why the setting of 2.4 is often referred to as Constant Image Height, or simply CIH. The only change is the width of the image: a 2.4-format movie will fill the entire 3.05-meter screen width, but a 1.78 image is only 2.31 meters wide. Thus, the area of ​​a 1.78 image is 1.30 x 2.31 = 3.00 square meters. Conversely, if you install a 3.05-meter wide 16:9 screen, the area of ​​your 1.78 image will be 3.05x1.71=5.22 square meters. 3 vs. 5.22, this is a much larger 1.78 image – almost twice the size of the original.
Let us take a look at the illustration of this comparison. Below are photos of two 3.05 meter wide screens. The first is the 2.4 format and the second is the 16:9 format. As you can see, the 16:9 picture is bigger because it has more vertical space for you to display. These images are all from a scene in Chicago in the 1.85 format. On a 2.4 screen, it has black borders on either side, and on the 16:9 screen it is almost full:
So, despite the fact that the two screens are the same width, a 1.85 movie like "Chicago" looks much larger on a 16:9 screen - almost twice the size - thanks to its larger Vertical height.
At the same time, whether you use a 3.05 meter wide screen of 2.4 or 16:9, a 2.4 movie is the same size on both screens - both 3.05 meters wide, 1.30 meters high, and a total area of ​​3.97 meters. The only difference is that the 2.4 screen will give you a full-frame display, while the 16:9 screen will bring the black and white edges up and down.
So, let's summarize: If you are like most people, the size of the room determines the maximum width of the screen. Once you have determined the width of the screen you can install, you will determine the absolute size of your 2.4 image. The only remaining question is how do you want the 1.78 and 1.85 shows to appear? If you want them to look smaller than your 2.4 movie, then choose the 2.4 screen. If you want them to look bigger than your 2.4 movie, increase the vertical height of the screen and choose the 16:9 format.
In this article, I used a room with a projection wall width of 4.27 meters and a height of 2.75 meters as an example to illustrate various concepts. Your room is likely to be different, so it's important that you research the special limitations of your room before evaluating the one that works best for you.
Always remember that your final decision should be based on the type of show you like most. I have an audio-visual room with a 2.5-meter wide 2.4 screen, which is great for 2.4 movies. But for HD concerts it is not so fascinating. When I played "The Eagles 2004 Melbourne Concert", I wanted the feeling of being wrapped and sitting in the front row, and the 1.85 image on my 2.4 screen was too small to produce this effect. When I open the party, I like to cast the concert on the screen, and I hope that the image has the greatest impact. So I took the 2.4 screen and replaced it with a 16:9 screen, which is not as wide as the former, but for 1.85 shows, the total area has increased by about 50%. The larger the image, the more condescending the presence is, which is a more amazing factor.
The question is, which program in your theater are you most concerned about? If your interest is mainly in 2.4 movies and you are willing to watch the 1.78 and 1.85 formats in smaller sizes, then the 2.4 screen is an excellent choice. If you add HD sports broadcasts and concerts to your watch list, a 16:9 screen will often lead to a more engaging viewing experience.
Aspect ratio and projector selection
So far, we have focused on aesthetic considerations, how you want images to appear on the screen. But choosing a 16:9 or 2.4 screen will also have an impact on your final choice of projector. Almost all home theater projectors project native 16:9 images, so all home theater projectors can easily be paired with a 16:9 screen. However, for the 2.4 format screen, you need to do one of the following two things to match the projector to the screen: (1) Select a zoom lens with a zoom range of more than 1.3 times, preferably with a power zoom And the motorized lens shift, or (2) in addition to the projector, then plan to install an external anamorphic lens. The second option is much more expensive. We will discuss these issues in future articles, but so far you should remember that if you choose 2.4 screen, you will need a projection system that can project various types of programs in a fixed height format.
in conclusion
The bottom line is: Your theater is your master. You can decide how images of different formats are displayed. Some people like the super-wide 2.4 visual effect, preferring to limit the size of the 16:9 and 4:3 formats to make the 2.4 movie look bigger. Some people prefer to use a higher screen to get a larger display area for 1.78 and 1.85 images. There is no difference between the two methods. But no matter how you choose, you always need to make compromises. No single screen format works perfectly with all TV and movie shows.
This article focuses on the first and most important decision you need to make when building a home theater. Which aspect ratio is the best choice for your personal preferences and viewing focus? After determining this, the next question is how big your screen should be, and how far should you sit off the screen? This will be the next topic in the series, coming soon, so stay tuned. (Finish)
(Note: For non-native English speakers, subtitle display is a missing question in this article. If the player can locate the subtitles inside the 2.4 screen, there is no problem with the 2.4 screen. However, for the inability to move the subtitles up to the inside of the 2.4 screen. For the player, the subtitles will fall below the 2.4 screen and will exceed the 2.4 screen.