Take a look at the world around you-if you have good eyesight, you will see everything is absolutely shiny. The digital photograph of the object or TV or computer monitors that you see directly on an object, the image of that object is never so clearly visible. If you see a few inches from the TV screen, you can see thousands of color dot pixels and may see the picture flickering.And that's why high-definition television is used to get good image quality - which is briefly said, HD TVs. Compared to the normal TV, HD TV's picture quality is very shy and does not flick the picture. Besides, movies on HD TVs are seen in their original Wide Screen Resolutions and there is no black screen on the four sides of the screen. So how does HD TV produce so much clean picture on such a big screen? -Let's know the details .
Eyes, TVs and digital cameras
We have 130 million cells to detect light in our eyes, which are called Rhodes and Kos. That means our eyes in the digital camera is 130 megapixels. An image of retina in our eyes than an extremely high quality professional digital camera is about 10 times higher resolution. That is, today's TV screen, computer monitors and whatever is not able to produce better picture than our eyes.For many years television technology worked on analog signals and TVs were dependent on cathode ray tube or CRT technology. The TVs were working through an endless radio signal, and this radio signal was transcribed to video and audio. This analog signal came from antenna or satellite on the TV.In the DVD player, the digital signal was turned into an analog and displayed on TV. Anyway, it's a long time ago, though many people still have bigger TVs in their homes.
Analog TV is never able to provide Better Picture quality. These TVs are about 700 pixels in length and approximately 500 pixels flat (actually have 704x480 resolutions) and analog TVs are called SD TVs or Standard Definition Television, which can produce a 0.33-megapixel motion picture. That means if you have a 3 megapixel camera, it can generate 10 times better picture than an SD TV.
Analog signal and CRT television working in this technology are never too advanced and some are seen to flick the picture on the TV. However, analog TV comes after digital television or dtv The DTV works on Ultra High Frequency or UHF and since it catches digital signals, it can offer great quality picture on a small screen.
Digital TV's broadcaster can broadcast multiple signals in the same frequency, and does not transmit another channel with a channel.
More pixel = advanced picture quality
Current TVs work like digital cameras. Even if you are looking at the current computer monitor, if it is HD, then maybe 1366x768 resolutions or 1920x1080 will be resolved.HD resulence is usually 1280x720 pixels (720p), which is like a 1 megapixel digital camera and is 1920x1080 pixels (full hd or 1080p) which is like a 2 megapixel digital camera. The old computer monitor or CRT monitor or TV's resolution was 800x600 or 640x480.
From a little front of the old monitors, the dot dot could be seen from the front, which seemed to look like a brick in a brick wall.
Does HD TV mean HD picture?
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You can only see HD quality images on HD TVs when HD pictures will be sent through its signals. That means Broadcasted Picture Resolutions must also be 1280x720 or 1920x1080 pixels. Picture quality of the DVD player is less than the HD TV, but the Blu-ray player is capable of providing a great quality picture.
So what do you need to get HD TV? You can not play HD on old SD TVs. Kenona SD TVs and HD TVs work completely differently, they work in different resolutions, work in different aspect ratio and work on separate signals. Again you will not be able to enjoy HD TVs on the normal digital TV.
To enjoy HD TV, you will need an HD TV set and will need HD decoders. The HD decoder can be a Blu-ray player or set-top box.