Compared with traditional VGA monitors, high-definition multimedia interface (HDMI interface) is clearer, especially notebook computers almost all use HDMI interface. However, there are many versions of the HDMI interface, 1.1, 1.2, 1.3, 1.4, 2.0 and the latest version 2.1. Each version has its own differences. The following Dite will introduce the differences of each version of the HDMI interface.
One: HDMI 1.1 version
This is the first version of HDMI. The original version 1.1 of HDMI only supports 1080i standard signals, but it cannot fully support 1080P high-definition specifications. A few years ago, it was able to basically meet the needs of users. So far, only supporting the 1080i format has been unable to meet the needs of most audio and video enthusiasts.
The original HDMI 1.1 version was already good, despite some compatibility issues, supporting standard resolutions like 800×600 and 1024×768. Even with the 1366×768 resolution of low-end flat-screen TVs at this stage, in terms of compatibility, this original version of the HDMI interface is already beyond everyone's acceptance.
In addition, LCD TVs equipped with this interface cannot perform point-to-point output when playing high-definition signals, and the images presented will also have problems such as blurring and inaccurate colors.
Two: HDMI 1.2 version
The introduction of HDMI version 1.2 largely solved the problems of low resolution and poor compatibility with HDMI 1.1 supported computer equipment. The HDMI standard organization introduced the HDMI1.2 standard in 2005. This interface is based on the T-Tomtt version 2 standard, and realizes 165165MHz bandwidth on a single link, which can provide a data transmission rate of 4.95Gbps, and can fully support 1080P full HD video signals.
By modifying the standard specification, HDMI version 1.2 also enhances the compatibility with the display interface of computer equipment, can easily support all display resolutions, including 1366×768, and can fully support point-to-point picture display mode.
Three: HDMI 1.3 version
HDMI version 1.3 is now the most widely used standard and is the HDMI interface used by most tablets today. The biggest change brought by HDMI1.3 version is to increase the single-link bandwidth frequency to 340MHz, which will enable these LCD TVs to obtain 10.2Gbps data transmission. Version 1.3 has 4 pairs of transmission channels, one of which is a clock channel, and the other 3 pairs are TMDS channels (to minimize the transmission of differential signals). They each have a transfer speed of 3.4Gbps.
Then 3 pairs are 3*3.4=10.2Gbps, which can greatly expand the 24-bit color depth supported by HDMI1.1 version 1.1 and 1.2 to 30-bit, 36-bit and 48-bit (RGB or YCbCr). HDMI 1.3 supports 1080P; also supports some low-demand 3D (not in theory, but in practice).
Four: HDMI 1.4 version
HDMI 1.4 can already support 4K, but due to the bandwidth of 10.2Gbps, 1080p (1920x1200@30Hz-50Hz) can only reach 3840 x 2160 resolution and 30FPS frame rate.
HDMI 2.0 expands the bandwidth to 18Gbps, which can support a resolution of 3840×2160 and a frame rate of 50 frames per second and 60 frames per second. Support plug and play and hot plug, support 720p, 1080i @ 60hz, 1080P (1920 x 1200 @ 70hz) (3840 x 2160 @ 60 fps @ 24hz/25hz/30hz) high resolution;
It supports full HD and 3D display (4Kx2K@50/60fps@24Hz), and supports the smooth operation of super-large games such as PS3. Dolby true-hd and dts-hdmasteraudio are supported, while audio supports up to 32 channels with sampling rates up to 1536kHz.
Other major improvements:
1. Dual video streams can be simultaneously transmitted to multiple users on the same screen
2. Multiple audio streams can be transmitted simultaneously to up to four users
3. Support 21:9 ultra-widescreen display
4. Dynamic synchronization of video and audio streams
5. CEC extensions enable better control of consumer electronic devices through a single point of control
Five: HDMI 2.0 version
The HDMI2.0 version expands the bandwidth to 18Gbps, and can achieve a 50/60Hz image refresh rate in 4K image transmission, making the playback vivid and smooth, the video effect is ideal, there is no stuttering, and it is softer to the human eye. At the same time, it supports up to 32 audio channels and a sampling rate up to 1536kHz, which is the current standard interface for the 4K industry. At the same time, it also provides backward compatibility. In other words, HDMI version 2.0 can be used as HDMI version 1.4, but version 1.4 cannot replace HDMI version 2.0. HDMI version 2.0 is an upgraded version of HDMI version 1.4, which means more powerful.
As far as color saturation is concerned, HDMI 2.0 supports 10-bit color depth. Version 2.0 has a better sense of color hierarchy than version 1.4, and the picture is more delicate and rich.
Six: HDMI 2.1 version
The standard can provide up to 48Gbps of bandwidth. More specifically, the new HDMI 2.1 standard now supports 7680×4320@60Hz and 4K@120hz. Among them, 4K includes real 4K of 4096×2160 pixels and 3840×2160 pixels, while in the HDMI 2.0 specification, only 4K@60Hz is supported at most. Up to 12x the color depth per pixel, which is good news for Intel, Nvidia, and AMD.
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Original link: https://blog.csdn.net/weixin_36322984/article/details/112588811