What does HDMI mean?
HDMI English full name "High Definition Multimedia Interface" is a digital video/audio interface technology. It is a dedicated digital interface suitable for video transmission . It can transmit audio and video signals at the same time. The maximum data transmission speed is 18Gbps. A digital/analog or analog/digital conversion is performed before transmission.
In layman's terms, HDMI is a high-definition video interface, which is relatively common in mainstream notebooks, LCD TVs, graphics cards, and motherboards . HDMI is a digital video/audio interface technology. It is a dedicated digital interface suitable for image transmission. It can transmit audio and video signals at the same time. The maximum data transmission speed is 5Gbps. It is the most popular high-definition interface at present, which is incomparable with ordinary VGA display interface. Just like broadband and optical fiber in broadband, the data transmission capability is very different.
The picture shows the notebook HDMI interface
Of course, the current high-definition interface is not only HDMI, such as DP high-definition interface, etc., interested friends can also learn about it.
What is the use of HDMI interface?
HDMI mainly meets the needs of high-definition video above 1080P. For example, the motherboard or graphics card is equipped with an HDMI interface, indicating that the computer equipped with the motherboard or graphics card supports 1080P video output. We can connect a monitor or LCD TV that supports 1080P resolution to the computer to play 1080P full HD video.
The picture shows the HDMI data cable
For mainstream LCD TVs, they are generally equipped with HDMI high-definition interfaces, which can be used to connect desktop computers or notebooks that support 1080P full HD video through HDMI data cables to achieve large-screen 1080P ultra-clear video experience.
HDMI interface misunderstanding: HDMI interface cannot transmit audio
Many people think that HDMI is just a video interface, only supports the transmission of image signals and does not support audio signals. Generally, after we connect the computer to the LCD TV through the HDMI data cable, we will find that the TV has no sound, and we need to add an additional audio cable.
The picture shows the LCD TV HDMI interface
But in fact, the HDMI interface supports sound transmission, but the audio and video signals of most computers are independent of each other and output separately, so many friends mistakenly believe that the HDMI interface does not support audio.
Small knowledge of HDMI interface
In August 2005, the bandwidth of the HDMI 1.2a interface was 165MHz and the transmission rate was 4.95Gbps.
On May 22, 2006, seven companies, including Sony, Hitachi, Panasonic, Philips, Toshiba, Silicon image, and Thomson (RCA), which established the HDMI standard, jointly announced the HDMI 1.3 interface standard. The new standard doubled the bandwidth and speed. Above, the bandwidth of 340MHz and the rate of 10.2Gbps have been achieved to meet the requirements of the latest 1440P/WAXGA resolution.
On May 30, 2009, HDMI Licensing, LLC, an authority authorized by the HDMI specification, announced the technical characteristics of HDMI 1.4, adding HDMI Ethernet channel, audio feedback channel, and support for higher resolutions: The high-definition resolution supported by HDMI devices will be Achieve 7 features including 4K×2K.
According to the above definition, in fact, the transmission of 1080p signals only requires the interface of HDMI 1.2a version, which is enough and more than enough. At present, the products using HDMI 1.3 interface are only for the future of higher-standard high-definition signals and more than 10 channels. application preparation in advance for ultra-high bandwidth data transmission.
Introduced here, I believe that everyone will have an in-depth understanding of what HDMI is and the HDMI interface. HDMI interface has now been widely used on desktop computers, notebooks, LCD TVs and other equipment, and everyone is very common. We only need to understand HDMI It is a high-definition video interface, which is more mainstream than the traditional VGA interface and supports 1080P full HD video transmission.