HDMI version 1.0
The earliest version of HDMI 1.0 was launched in December 2002. Its biggest feature is the digital interface that integrates audio streams. It was more advanced and convenient than the popular DVI interface at the time. At the same time, it is also more suitable for use with audio-visual equipment.
HDMI version 1.0 supports video streaming from DVD to Blu-ray formats and has CEC functionality. When applied, a common connection can be formed between all connected devices, making it easier to control the entire device group. The comparison of cable specifications during the same period is very strong.
There are three versions after version 1.0, namely versions 1.1/1.2/1.3. HDMI version 1.1 was launched on May 20, 2004, adding support for DVD-Audio. HDMI 1.2 version was launched in August 2005, adding support for 1-bit audio and SACD audio streaming, supporting up to 8 channels.
HDMI 1.3 version was launched in June 2006. It has made huge progress, increasing the bandwidth frequency to 340MHz, allowing LCD TVs to obtain 10.2Gbps data transmission. Supports Deep Color, Dolby TrueHD, DTS-HD master audio and other technologies, and can stream audio from a Blu-ray machine via HDMI to a supported power amplifier for decoding.
HDMI version 1.4
In the development process of HDMI, version 1.4 is the most popular version and was launched in May 2009.
HDMI version 1.4 can already support 4K, but due to the bandwidth of 10.2Gbps, it can only reach a maximum resolution of 3840×2160 and a frame rate of 30FPS. Later, as the 3D craze just started, HDMI 1.4 supported 1080/24p, 720/50p/60p 3D images. In terms of audio, the ARC function has also been added, which allows TV audio to be transmitted back to the power amplifier through HDMI and then output.
After the HDMI 1.4 version, there are also HDMI 1.4a and 1.4b, which are minor revisions made after the 3D craze caused by the influence of "Avatar".
HDMI version 2.0
HDMI 2.0 bandwidth has been expanded to 18Gbps, which can support 4K/60p video. The playback is vivid and smooth, the video effect is ideal, there is no lag, and it is softer to the human eye. It is also compatible with Rec.2020 color depth, which can make the color layered and the picture more delicate and rich. And supports plug and play and hot swap.
At the same time, it also supports 3840*2160 resolution and up to 60Hz frame rate. At the same time, the audio aspect has been greatly increased, able to support up to 32 channels of lossless audio, and a maximum sampling rate of 1536khz. It is one of the versions we commonly use now.
The subsequent HDMI 2.0a and 2.0b only added support for HDR format transmission on the basis of HDMI 2.0 to enhance image quality, and there is not much difference in other aspects.
HDMI version 2.1
HDMI 2.1 version is one of the most popular versions currently and was launched in January 2017. HDMI 2.1 significantly increases the transmission bandwidth from 18Gbps to 48Gbps, and can support images up to 7,680 × 4,320/60Hz (8K/60p), or higher frame rate images of 4K/120Hz.
HDMI 2.1 supports dynamic HDR, which is not available in version 2.0. Dynamic HDR can further improve the contrast and light and dark level performance according to the light and dark distribution of each frame, and display a wider color gamut.
In terms of sound effects, HDMI 2.1 supports the new eARC (audio return channel) technology. Compared with the existing ARC, it can return Object-based sound effects such as Dolby Atmos. At the same time, it also supports new technologies such as variable refresh rate, fast media switching, fast frame transmission, and automatic low-latency mode.
Finally, there is the latest HDMI 2.1a version, which is an upgraded version launched in January 2022. Only the SBTM function is added, which can reduce the color adjustment pressure on the display and enhance the HDR display effect.