The difference between HDMI and DVI
I believe that you can count a lot of digital, terminal, AV terminal, color difference component interface, VGA interface, DVI interface... When it comes to the latest HDMI interface, everyone will not be unfamiliar. As the latest generation of digital interface, HDMI has been widely used. Used in a variety of digital products. Whether it is a flat-panel TV, a DVD player, a high-definition player, a projector, a digital video camera, a liquid crystal display, and Blu-ray DVD and HD DVD, the HDMI digital signal interface is indispensable. However, due to the relatively short time of HDMI launch, the input or display devices used by many friends are still DVI interface products, which creates a matching problem between old and new devices. How to connect the player of DVI interface with the display device of the newly purchased HDMI interface has become a problem that plagues HD fans. Therefore, the corresponding DVI to HDMI adapter or DVI to HDMI adapter cable came into being. For distance reasons, we usually use DVI to HDMI cable to connect DVI to HDMI devices.
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Many friends may have this or that question about DVI to HDMI cable. In fact, the DVI to HDMI cable is far less mysterious than people think.
Question 1. What is the relationship between HDMI and DVI, can they really be converted between them?
HDMI (High-Definition Multimedia Interface), also known as High-Definition Multimedia Interface, is the first all-digital high-definition, multi-channel audio and intelligent format and control command data that supports transmission over a single cable without compression. Digital interface. The HDMI interface was promoted by Silicon Image USA and jointly developed by a working group jointly established by eight famous consumer electronics manufacturers such as Sony, Hitachi, Panasonic, Philips, Thomson and Toshiba. HDMI's earliest interface specification, HDMI 1.0, was released in December 2002. The current highest version is the HDMI 1.3 specification released in June this year.
The HDMI interface typically provides up to 5 Gbps of data transmission bandwidth and delivers uncompressed audio and high resolution video signals. An important feature of HDMI is that it only needs one HDMI cable to complete the simultaneous transmission of video and audio signals. It does not need to cooperate with multiple wires in the past to achieve higher audio and video transmission quality. At the same time, because it does not need to perform digital/analog or analog/digital conversion before signal transmission, the transmission quality of video and audio is effectively guaranteed.
HDMI is derived from DVI interface technology. They are mainly based on the TMDS signal transmission technology of American Crystal Image Company. This is the reason why the HDMI interface and DVI interface can be converted to each other through the adapter. It is compatible with DVI on the pin, but only Different packages are used. Compared to DVI, HDMI can transmit digital audio signals and add support for HDCP while providing better DDC options. In principle, HDMI is fully backward compatible with DVI.
Question 2: Will the use of DVI to HDMI cable affect the quality of playback?
Strictly speaking, the quality of playback will not be lost, because they do not need to be converted at all! In terms of technical specifications, HDMI to DVI is backward compatible. All DVI specifications, HDMI can "do things according to the rules", so DVI to HDMI theory will not appear any grayscale distortion problem!
For today's DVI displays, displays that meet the HDMI 1.3 specification interface requirements have long been popular, and only a handful of displays that still use the 1.0 specification are likely to have so-called grayscale distortion. At this time, we only need to adjust the player settings. Take Kmplayer as an example. If there is gray distortion such as black distortion and white scattering, just open the “Fuzzy/Levels†option in the parameter options to enable the color scale. The control option can be solved by selecting 16-236 instead of the default 0-255 at the output amplitude position.
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