It's been less than a month since the 12-year-old pickpocket festival. Has it been stuffed in the shopping cart?
I believe that many small partners are taking advantage of the double 11 to make big changes to their homes? As the recent price of the upstream panel has dropped, it is a good time to change the home TV.
I still remember that when I was a kid, I wasn't at home and stealing two sets of contraries. I had to insert the bully into the TV's antenna hole and search again. Later upgraded to the Sega MD, with the AV line is much easier. But now, when it develops into Full HD and 4K era, what changes have taken place in the interface of TV? Today, Lao Yang will take you to know.
RF input
The so-called antenna port is also a must-have interface for the old-fashioned cable television, and is also a very antique standard. Its development in our country can even be traced back to the 1980s.
With the increase in broadband set-top boxes provided by broadband providers, this interface has become increasingly useless, and even some Internet TVs no longer provide an RF input interface.
HDMI
With the development of Internet TV, HDMI has become the standard interface to replace RF in recent years. Now cable set-top boxes, network set-top boxes, PS4 or Xbox game consoles and even a lot of power amplifiers can be connected to TVs through HDMI, so if the TV has only one or two HDMI is certainly not enough, at least three have to start.
However, in fact, HDMI and HDMI are not the same. Since 2002, it has evolved from the very beginning of HDMI 1.0 to 2.1, and HDMI was primarily used on computers.
The earliest HDMI 1.0 version was launched in December 2002. Its biggest feature is that it integrates the digital interface of the audio stream compared with the popular DVI interface in the PC interface at that time.
Subsequent 1.1, 1.2, and 1.3 upgrades to the transmission rate, color depth, bandwidth, and frequency, respectively, to the more mature HDMI 1.4, bandwidth upgrade to 10.2Gbps.
HDMI 2.0 further increases the bandwidth and adds hot-swap, and the increase in bandwidth is in the simplest terms it can support better quality transmission. Therefore, the significance of 2.0 is 4K video.
In fact, the 1.4 period has already been able to support the transmission of 4K resolution video, but is limited by the bandwidth and only supports 4K video of 30FPS. The 2.0 standard can support 4K video transmission of 60FPS.
Subsequent HDMI 2.0a and 2.0b have slightly increased HDR video and sound effects, respectively. The latest HDMI 2.1 has no commercial products.
In addition to the HDMI version, there will be some additional features, that is, the interface is often written on the ARC, MHF, etc., which is why they are used?
ARC: The sound returns. This feature allows the TV to transmit digital audio signals back to the amplifier or HDMI ARC-enabled audio device via the HDMI cable, without relying on fiber/coaxial audio output interfaces. This is necessary when building a home theater.
MHL: mobile high-definition connection, through an MHL cable can be mobile phones, tablet PCs and other mobile terminals (mainly Android devices) audio and video signals transmitted to the TV, while audio and video transmission can also be used for charging. However, there are not many compatible mobile devices.
10bit: The general notebook screen is 6bit, some high-end 8bit, special professional 10bit, it can be understood as the color depth of 2 of the 10th power. The 10bit also refers to a video encoding technology that can provide very high video quality, and can show extraordinary sophistication in terms of color progression and change. It is currently the main color depth encoding of HDR video.
AV interface
Do not see these two letters on the excitement, the full name of AV can also be Audio and Video, this is a bit more advanced than RF, but the standard behind HDMI and backward, ten years ago the mainland is very popular VCD and DVD are basically using this standard.
It consists of three lines of red, white, and yellow. The yellow line is the video transmission line. Red and white are the sound transmissions for the left and right channels.
Since the AV input causes loss of the color signal, the chroma signal and the luminance signal also interfere with each other, affecting the quality of the final output image, so the upgraded version component interface of the AV comes later.
Compared with the AV interface, video transmission quality has greatly improved. The color-difference component line consists of five lines, three of which transmit images and two of which transmit audio. This is somewhat cumbersome to use.
optical fiber
This fiber also has nothing to do with your home broadband network, this fiber is used for audio output, mainly for group amplifiers and home theater.
However, TV's R&D is increasingly focusing on the upgrade of its own speaker system, so I believe that this interface will be eliminated soon.
to sum up
If it is for older parents to change television, then Lao Yang still recommends buying products with standard RF interfaces. Because even if they bought a smart TV for their parents, they would not bother to study it. Most of them are turned on every day to read news or eight-point TV dramas, life habits, it is difficult to change.
For young people, then the more HDMI is, the better. If you happen to have a new host such as the PS4 Pro or Xbox One X in your home, then choose a device with an HDMI 2.0 or higher interface, or you'll be wasting your entire 4K signal output.
As for the USB interface, the 2.0 version is generally sufficient, if you like to put the HD source on a U disk or mobile hard disk, and then insert the computer to play, then you still have to 3.0.
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