The resolution refers to the number of pixels that a screen is capable of offering and it is measured by multiplying the pixels across the width and height of the image. As a general rule, the higher the number of pixels, the higher the resolution.
In the field of digital television, specifically high-definition television, the acronym HD refer to the resolution of a screen that has 1280×720 pixels, also known as 720p.
Among the most popular screen resolutions are those with a resolution Full HD or of 1920×1080 pixels. This resolution is also called 1080p.
The denomination Ultra HD describes those screens with a resolution of 3840×2160 pixels. These screens are usually promoted with the description “4K”, for having almost 4000 pixels across it, despite the fact that this name is not the most appropriate.
The resolution 4Kknown as DCI 4Kis a format used originally and mainly in film production and in movie screens. These screens have a resolution of 4096×2160 pixels.
Regarding the resolution 8Kit has 7680×4320 pixels. This resolution is also known as Full Ultra HD and is the latest generation of high definition screens to hit the market.
Among the factors that influence the resolution of a screen are its size, the type of sweep with which the image is projected, the image refresh rate and the distance from which it is viewed.
HD Full HD
Definition
It is the high definition resolution of a screen that has 1280 horizontal pixels by 720 vertical pixels.
It is the high definition resolution of a screen that has 1920 horizontal pixels by 1080 vertical pixels.
Characteristics
It offers good resolution on relatively small screens. The pixels are perceptible if the image is viewed at short distances. It is no longer the norm and is falling out of use. Relatively low price. Its resolution is more than twice that of an HD screen. Crisp images at shorter distances than HD. It is one of the standards still in force at the consumer level. Relatively low price.
other denominations
High Definition, HD Ready, 720p.
Full High Definition, HD Ready 1080p, True High Definition, 1080p.
Image size
1280 x 720 = 921 600 0.9 megapixels.
1920 x 1080 = 2.1 megapixels.
Approximate Ideal Viewing Distance Minimum distance of 3 m for a 50-inch screen. Minimum distance of 2 m for a 50-inch screen. UltraHD 4K 8K
Definition
It is the ultra-high definition resolution of a screen that has at least 3840 horizontal pixels by 2160 vertical pixels.
It is a resolution used in film production and projection, known to have 4096 horizontal and 2160 vertical pixels.
It is the ultra high definition screen resolution that has 7680 horizontal and 4320 vertical pixels.
Characteristics
Resolution four times greater than that of a Full HD screen. High degree of immersion, with razor-sharp images at shorter viewing distances than Full HD. It is one of the most popular formats today. Its relative price is still somewhat high. Variety of content production. Resolution is somewhat higher than that of an Ultra HD screen. Developed for use on movie screens and motion picture cameras. It has several types of aspect ratio. Resolution four times greater than Ultra HD. Latest generation of high definition screens. High degree of immersion. High price and limited supply of audiovisual production. It is possible to take advantage of content produced in 4K.
other denominations
4K, UHD, UltraHD, UHDTV.
DCI 4K.
8K UHD, Full UHD, Full Ultra HD.
Image size
3840 x 2160 = 8.3 megapixels.
4096 x 2160 = 8.8 megapixels.
7680 x 4320 = 33 megapixels.
Approximate Ideal Viewing Distance Minimum distance of 1 m for a 50-inch screen. Minimum distance of 7.7 m for a cinema screen of about 10 m. Minimum distance of 50 cm for a 50-inch screen.
What is resolution?
The resolution of a screen refers to the level of definition offered by television, computer or mobile screens, as well as projectors. This is measured based on the number of pixels that the screen has width and height. For example, a high definition or HD resolution screen is 1280 x 720 pixels.
Resolution and number of pixels
A pixel is the minimum or basic unit with which a color is represented on a screen. That is, a pixel is each one of the “squares” that can be observed when an image is amplified.
Now, the resolution of a screen is expressed in pixels, which are presented as the number of pixels across the width and height of the screen. As a general rule, how much the higher the resolution that has a screen (number of pixels), greater is its definition.
Thus, in two screens with the same size, but with different resolutions, the one with the higher resolution will have more pixels and the screen with the lower resolution will have fewer pixels.
In addition, to know the resolution of a screen, the horizontal lines that it has are counted. Each horizontal line represents the measurement of one pixel high. For example, a 1280 x 720 screen has 720 horizontal lines.
Interlaced scan and progressive scan
He sweep, scan or interlaced scan (interlaced scanning) refers to the presentation on the screen of an image that is divided into two different parts or frames intertwinedand is described by the letter “i” (as in 1080i).
Each frame consists of a series of odd or even horizontal lines. The odd lines are projected first, left to right and top to bottom, followed by the even lines. This process is carried out at a very high speed, at 1/60 part of a second, so it is not perceptible to the naked eye.
If a screen has a resolution of 1080i, this means that it has 1080 horizontal lines. However, the total of the even lines (540 lines) are part of one frame, while the total of the odd lines (540 lines) are part of another.
Interlaced scanning was used in the past to transmit the analog television signal. However, it began to fall out of use today. One of its biggest disadvantages is that the displayed image is incomplete, as it is made up of two different frames, producing the appearance of “ghost” images.
The sweep, scan or progressive scan (progressive scanning) refers to the presentation on the screen of a complete image that is not separated into different frames. The letter “p” is used to identify if a resolution has progressive scan, together with the description of its size. For example, a 1080p resolution has a progressive scan.
In this case, progressive scan means that each horizontal line is scanned in sequence. Thus, the screen projects one by one the lines from top to bottom in order and the image they form corresponds to a frame.
screen refresh rate
refresh rate of a screen (refresh rate) refers to the number of frames that a screen is capable of displaying in one second. This frequency is measured in hertz (hertz) or cycles per second.
A screen capable of updating 120 frames per second, is a screen that has a refresh rate of 120 Hz. In the same way, if a screen has a frequency of 60 Hz, the refresh rate of this screen is less than that of a 120hz one.
The speed with which screens refresh images is related to screen resolution, since the higher the refresh rate, the sharper and smoother the video will look.
Resolution, screen size and viewing distance
Both the size of a screen and the distance from which the content displayed on it is viewed are key elements that influence the way a given resolution is appreciated. As a general rule of thumb, the higher the resolution, the closer images can be viewed on a screen without the pixels being noticeable.
The size of television screens and monitors is measured according to the diagonal length of the screens. If a television has a 14-inch screen, this means that there are 14 inches diagonally from one corner of the screen to the other.
As a general rule, the higher the resolution of a screen (the more pixels it has), the closer you can be to it without the image losing definition. On the contrary, the lower the resolution of a screen (fewer pixels it has), the further away it will have to be viewed in order not to lose definition.
What is HD?
Abbreviations HD either HD describe the resolution of a high-definition display 1280×720 pixels. The total number of pixels of these screens of 921 600 (about 1 megapixel). This resolution is also known as 720p.
The “p” added to the 720p description indicates that the device or TV screen progressively scans images.
HD resolution may also be described as HD Ready (HD Ready) on different devices. In this case, HD Ready points out that these devices offer a minimum resolution of 720p.
HD resolution has an aspect ratio of 16:9, between the width and the height of the screen. This aspect will be the standard used for the following generations of higher resolution displays.
Regarding the relationship between the size of the screen and the minimum ideal visual distance, it is advisable to use screens that are not very large if their resolution is simply HD or 720p, or view them from a greater distance.
Thus, if a television is 20 inches in size and has a 720p resolution, the recommended minimum distance to enjoy this quality would be 1.2 m. If the screen is observed closer than this distance, the pixels that make up the image will become evident, subtracting definition from it.
720p HD displays are falling out of favor and popularity, due to higher resolutions being offered on the market at relatively low prices.
What is Full HD?
The description Full HDor true or full high definition, indicates that the resolution that a screen is capable of offering is 1920×1080…