An HDMI cable is necessary in today's world. High Definition Multimedia Interface uses a digital signal to create progressive scanning images. But what does that mean?
An analogue signal is when an electrical current is varied as it is sent up a wire. Information can be sent in this way. Analogue signals, unlike digital, really are high resolution. Digital is only as high resolution as processing power allows, but analogue is nothing more than a stream of electrons being conducted along a surface such as silver. It can be zoomed in to very small degrees. This is only practical to a point, however, because the components necessary would have to be finer and finer.
That's why digital is better. It can be very fine, very easily. It's nothing more than a stream of data. The more data, the finer the signal. The faster the processing chip, the more data. It's much easier to create a fast processing chip, just narrow the laser that etches it. Of course, you only make the signal as fine as you need it, which means it will break down very fast if you try to zoom in.
It's in the form of the infamous "ones and zeros" that everyone talks about but may not know exactly what it means. A "one" tells a microscopic circuit on a processing chip to open. A "zero" tells it to close. From there, information is outputted to another part of the computer, in the form of more ones and zeros.
Interlaced scans are the old method of displaying a picture. It's a series of half frames, between twenty-four and thirty, depending on where you live in the world. The frames are divided by many small rows, such as odd and even, with the following frame being the even rows. Never during this method does a complete frame show up on screen, but it all happens so fast, your brain doesn't notice the difference. This is very convenient a method, because you only need to send half the information for every frame.
Progressive scanning is when the entire picture is sent to the screen each frame. Old cathode ray tube screens work by firing streams of electrons at the back of the screen. They would fire in, you guessed it, the pattern of the interlaced line rows, over and over again, many times per second. High definition screens receive the information not in alternating rows, but simply each row at a time, for each frame.
Therefore, it's easy to see why analogue, although technically finer, is no longer practical, and interlaced video is just plain clunky. An HDMI cable is necessary to create the proper format.
An analogue signal is when an electrical current is varied as it is sent up a wire. Information can be sent in this way. Analogue signals, unlike digital, really are high resolution. Digital is only as high resolution as processing power allows, but analogue is nothing more than a stream of electrons being conducted along a surface such as silver. It can be zoomed in to very small degrees. This is only practical to a point, however, because the components necessary would have to be finer and finer.
That's why digital is better. It can be very fine, very easily. It's nothing more than a stream of data. The more data, the finer the signal. The faster the processing chip, the more data. It's much easier to create a fast processing chip, just narrow the laser that etches it. Of course, you only make the signal as fine as you need it, which means it will break down very fast if you try to zoom in.
It's in the form of the infamous "ones and zeros" that everyone talks about but may not know exactly what it means. A "one" tells a microscopic circuit on a processing chip to open. A "zero" tells it to close. From there, information is outputted to another part of the computer, in the form of more ones and zeros.
Interlaced scans are the old method of displaying a picture. It's a series of half frames, between twenty-four and thirty, depending on where you live in the world. The frames are divided by many small rows, such as odd and even, with the following frame being the even rows. Never during this method does a complete frame show up on screen, but it all happens so fast, your brain doesn't notice the difference. This is very convenient a method, because you only need to send half the information for every frame.
Progressive scanning is when the entire picture is sent to the screen each frame. Old cathode ray tube screens work by firing streams of electrons at the back of the screen. They would fire in, you guessed it, the pattern of the interlaced line rows, over and over again, many times per second. High definition screens receive the information not in alternating rows, but simply each row at a time, for each frame.
Therefore, it's easy to see why analogue, although technically finer, is no longer practical, and interlaced video is just plain clunky. An HDMI cable is necessary to create the proper format.
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