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Specification changes from HDMI cable 1.0 to 2.1

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Specification changes from HDMI cable 1.0 to 2.1

2024-02-23

The earliest HDMI version, version 1.0, was launched in December 2002. It can be said to be specially designed for full HD software such as Blu-ray of that year. Its biggest feature is that it integrates image and audio transmission at the same time. Compared with DVI cable and DisplayPort cable on computers, A pure image transmission interface, more suitable for audio and video equipment. HDMI 1.0 already supports DVD and Blu-ray video, with a maximum bandwidth of 4.95 Gbps, of which 3.96 Gbps is used to transmit video streams, which can support 1080/60p or UXGA resolution; audio support 8-channel LPCM 24bit/192kHz, in other words, has been broadcast to multi-channel Hi-Res. Compared with the cable specifications of the same period, it is quite strong; it has now been upgraded to HDMI2.1 version; the changes in later versions are mainly in In terms of design parameters, the wire structure has not changed much!

At the beginning of the year, the HDMI standard management organization HMDI LA released the HDMI 2.1a standard specification (the HDMI standard has been updated again, and the version has been upgraded to HDMI 2.1a). The new HDMI 2.1a standard specification will add a new feature called SBTM (Source-Based Tone Mapping) The function allows different windows to display SDR and HDR content at the same time to optimize the HDR display effect and give users a better experience. At the same time, many existing devices can support the SBTM function through firmware updates. Recently, HMDI LA officially announced that it has upgraded the HDMI 2.1a standard again and introduced a very practical function. In the future, new cables will support "HDMI Cable Power" technology to obtain power supply capabilities. It can strengthen the power supply of source equipment and improve the stability of long-distance transmission. To put it simply, it can be understood that based on the "HDMI Cable Power" technology, the active active HDMI data cable can obtain greater power supply capacity from the source device. Even an HDMI data cable several meters long does not require additional power. The power supply is more convenient.

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