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   Author :     AhmetZekiTasgar
   Date :     20-09-2021, 15:47
   Category :     What Does it Mean
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What Does HD Mean? What is HD Quality?

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We see the phrase HD almost every day on television, on the computer and even on the phone. So what does HD mean? Have you ever wondered what is HD quality and what does it do? We need to know that HD is actually a term used in both visual technology and audio technology.

It should not be forgotten that in today's technologies, it is up to us to choose the image quality of the video we will watch. HD is one of the features used in computers, televisions and phones used around the world. Therefore, it is an important feature when considering the device you will buy and use.



What is HD quality?

HD is actually an acronym. It refers to the abbreviation of High Definition words. The Turkish equivalent of this is " high resolution " or " high resolution ". HD quality means that every detail we see in the cinema is brought to our home screens. Of course, there is a technical aspect to this.

HD, which stands for high resolution, describes any video that has a higher resolution than standard definition (SD) video. A specific resolution such as 1980 x 1080 pixels is expressed as HD while high definition has a wide coverage.

Before the TVs we call HD were released, the most common video resolutions were 640 x 480 (NTSC) and 720 x 576 (PAL, SECAM) . NTSC is standard in the USA and Japan. PAL and SECAM were used in Europe and other parts of the world. When HD came along, they all became known as SD (standard definition).

A normal gray image consists of tiny dots called pixels. Pixels are broadcast on the screen as transverse lines. These are called image lines (aka scan lines). In such systems, the standard image consists of 525 lines. A single HD picture frame consists of 720 progressive or 1080 interlaced lines.

This line-forming state allows more detail to be presented when rendering a single HD image frame. This is a situation that makes the image better quality. HD quality also provides a high viewing angle, thanks to the 16:9 picture format. 16:9 offers a more lossless viewing pleasure than the 4:3 ratio.


What is Full HD?

Full HD actually means an expression of resolution. As you can imagine the expansion is Full High Definition . It should not be forgotten that the image on the television is formed by the combination of points called pixels. The more these dots, the better the quality and clarity of the image.
Devices called Full HD have 1980 x 1080 pixels. This also means 1920 rows of pixels, 1080 rows of pixels. In this way, more pixels fit on the screen. This means serious depth and sharpness on the screen through high resolution images.

On the other hand, the terms Full HD and HD Ready should not be confused. Full HD represents 1080p image while HD Ready represents 720p image. A 720p image has 921,600 pixels per image, while a 1080p image has 2,073,600. Even this will be enough to tell the difference between the two images.


What is HDTV?

HDTV means " High Definition Television ". HDTV is a high quality video standard developed to replace older video formats, often referred to as SDTV (standard definition television). On the other hand, developments in HDTV are not limited to image quality.

First of all, the HDTV signal is digital. Instead of the analog signal used in traditional NTSC broadcasts, HDTV is always digital. This eliminates analog interference caused by electric currents and magnetic fields. Second, HDTV uses a different aspect ratio than SDTV.

While previous broadcasts used a 4:3 ratio, HDTV uses a 16:9 ratio. This wider aspect ratio more closely mimics how people see the world, making the image look more realistic. This ratio is also better for watching widescreen movies recorded as widescreen for the same reason.
As the name suggests, high definition television offers a much higher resolution than standard definition video. A typical analog broadcast contains 525 horizontal resolutions, while an HDTV signal supports up to 1080. There are two formats most commonly used by HDTV: 720p and 1080p.

HDTV's higher resolution produces images with more detail and more color than previous formats. HDTV also offers a higher quality digital audio signal than SDTV. It supports up to six channels of audio as opposed to the two previously allowed.




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