HDMI

HDMI is designed to replace older analog audio and video transmission interfaces such as SCART or RCA terminals. It supports various TV and computer video formats, including SDTV and HDTV video images, plus multi-channel digital audio. HDMI and UDI without audio transmission function inherit the core technology of DVI, "Transmission Minimized Differential Signaling" TMDS, and are essentially still extensions of DVI. The video content of DVI, HDMI, and UDI is transmitted in real-time and dedicated lines, which can ensure that there will be no congestion when the video traffic is large. The data volume of each pixel is 24 bits. The timing of the signal is very similar to VGA. The picture is sent line by line, and a specific blank time is added after each line and each frame is sent (similar to the analog scan line). The data is not "Micro-Packet Architecture", nor will it only update the changed part of the previous and next frames. Each picture will be completely resent when it is updated. When the specification was first formulated, its maximum pixel transfer rate was 165Mpx/sec, which was sufficient to support 60 frames per second at 1080p quality, or UXGA resolution (1600x1200); it was later expanded to 340Mpx/sec in the HDMI 1.3 specification to match possible future needs.