Speak of HDMI monitor, each reader is a little unfamiliar perhaps. Actually this is LCD of a kind of the 2nd acting pure number that replaces DVI interface. HDMI is on the function not only the VGA interface that should compare imitate signal is a lot of more powerful, and the DVI interface that compares digital signal even more get the better of one prepare. Actually, those who depending on HDMI interface is brand-new and characteristic, those who used the LCD of this kind of interface to had made be worthy of the name " generalist " . Not only can join with computer photograph, and OK still with domestic movie theater it is join of sport plane photograph even. Come so, HDMI monitor also walked into bedroom sitting room with respect to ground of be perfectly justifiable, make its made the revolutionary product of high-definition times! The English full name of HDMI is HighDefinitionMultimedia, the meaning that is translated into Chinese is " interface of high definition multimedia " . HDMI is in assure to be able to be transmitted with digital form below high quality circumstance without compression high resolution video and data of much track frequency, the data that and still can be offerred is as high as 5Gbps transmits bandwidth. Will look at present, can satisfy the highest picture is qualitative 1080P resolution in HDTV not only, and still can support the most advanced digital frequency form such as DVDAudio, realize 8 track 96kHz or frequency of stereo 192kHz number to deliver. Can say, want to have transmission line of a HDMI only, can convey at the same time video signal and frequency signal, and be in whole transmission process, beardless reentry linage / model or model / several changeover, the image sound signal that ensured top quality greatly is deferent. the person that offset is expended, HDMI technology can offer clear picture to pledge not only, and as a result of frequency / video uses same cable, also simplified greatly the installation of system of domestic movie theater. The actor defect of HDMI is analysed
The advantage of HDMI
Of HDMI and DVI sutural it is identical, and HDMI is down compatible DVI. Set in the standard of HDMI so, once HDMI interface detects,equipment does not have the special identifier of HDMI, can be maintained to be DVI equipment. Come so, HDMI interface is complete according to the standard of DVI goes transmitting digital video signal, this moment needs to turn only contact, the problem of compatibility can be solved smoothly. In addition, HDMI still supports EDID, DDC2B, because this has the facility of HDMI,have " Plug and Play " characteristic. Signal source and the meeting is automatic between indication equipment undertake " talk things over " , the video with automatic the rightest choice / frequency format. HDMI interface still supports HDCP agreement, this kind of agreement sets, no matter be monitor still shows card to must offer HDMI port, cannot watch the high-definition program that has copyright normally otherwise. The high-definition video of 1080P level can lower his standard or status to be broadcasted to 720P level even, the visual effect of the person that watch also can get accordingly very big impact. Of course, contain HDMI port to let show clip, besides need appropriative chip, the manufacturer that show clip pays the HDMI attestation that brushstroke does not poor fee even. But even if is such, of HDMI interface show card to also had appeared on the market like emerge, see the glamour place of HDMI, and the hasten of general trends place of HDCP agreement. Besides, in light of the standard according to DVI, the passageway of a TMDS of DVI can achieve the digital interface of the working frequency of 165MHz and 10bit only. And actual bandwidth, can reach the level of 1.65Gbps only. Such data bandwidth, can realize the indication requirement of 1920 × 1080@60Hz. That is to say, once the bandwidth demand of data exceeds the dimension of 1080P or monitor to achieve 24 inches of above, so the bandwidth requirement that DVI interface can no more satisfy data to transmit. Although come round to look from eye, DVI standard still has augment compatibility, DVI still can use channel of the 2nd TMDS, such its bandwidth will cross 2Gbps high. But the HDMI that is 5Gbps than bandwidth, the inferior position of DVI is very clear still. More important is, DVI interface supports the 3 primary colors of signal of 8bit number video only, and the 3 primary colors that video of high-definition clear number asks to be able to support signal of 12bit number video, show the DVI interface on card to cannot have satisfied requirement apparently. Only HDMI can support signal of 12bit number video, the colour administrative levels that can let high-definition clear video is more rich, umbra detail is more exquisite. The 1080P picture that newest HDMI1.3 version can support 36bitRGB colour to handle 60Hz, support the 1080P picture of the 90Hz that 36bit colour handles at the same time. HDMI is having according to transmitting a respect in number fight attenuation ability outstandingly, can build an effect of more ideal movie theater of high-definition clear family.
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