【 Weak current College 】 HDMI and LCD TV connection to note a few details

HDMI as a new generation of digital video audio interface has become a basic configuration of the LCD TV. In accordance with SiliconImage company data provided, 2007 HDMI usage will reach 1 million, by the end of 2008, version popularity HDMI1.3 has.

As the popularity of the HDMI interface, in use also appears in some new issues, especially the many small details that should not be overlooked, if not careful attention to could be mischief.

Details: HDMI does hotplug

HDMI is the biggest advantage is easy to use, as long as a thread, audio video can all transfers. And interface design for easy plug, you do not need to press any buttons you can easily disconnect the plug. But this has brought another question, if in splash, direct plug in or unplug, it is easy to cause the HDMI interface chip burned. Therefore in swap HDMI cable, be sure not to hot swap, you must set the TV and HDTV player is closed before you can swap.

Details: 1.1 HDMI interface can transmit 1080P signal

Has long been a common misconception is that the only 1.2 over HDMI interface can transmit 1080P signals. In fact, 1.1 HDMI 1080P signal can also be transmitted.

In the evaluation process, the PS3 's HDMI output is set to 1080P, found many HDMI1.1 edition interface LCD TV does not show that there is no signal on the screen. However when you connect to Skyworth 47L20HF, but can show, through contact with Skyworth technicians, confirm Skyworth this LCD TV with HDMI interface is 1.1, 1080P signal can be transmitted.

1.1 interface is that it is theoretically possible to transmit 1080P signals, specific to each machine, can I transfer the complete look at manufacturers design, most 1.1 version of the interface may not be transferred. In fact, HDMI interface, as long as the TV circuit good enough, 1.1 transmit 1080P can achieve the same effect.

Details: short-distance transport 80 HDMI cable can

For most users, hi-def player are placed next to the LCD TV, you need HDMI cable 2 m, short of 1 m, normal select 1.5 m HDMI cable.
5 m wire that is short-distance transport, HDMI cable choice is relatively simple, wire one of the most important is the quality factor of the thickness of wire, HDMI cable, can be divided into 24, 26, 28 and 30, several lines, the smaller the number, the thicker wire diameter, the better the effect. For a 5 m cable, select 28 and 30 of the cord, 1.5 m not more than 80 should be 5 meters cord does not exceed $ 150.

Details: long-distance transmission on the wire have strict requirements

Long-distance transmission, HDMI wire very demanding. Determine the factors influencing the quality of HDMI wire diameter of the weight in addition, there are the following:

1. the selection of raw materials. Good wire, core wire is silver and black lines for tin plating low price.

2. the production process. Wire outer insulation foam is closely linked with the transmission quality, low foaming production equipment as long as 10 million, top-grade devices as high as 1600 Yuan, quality disparities.

3. masking effects. Low-end equipment production of HDMI cable shielding effect only 80-85% and the top grade wire shielding efficiency of 95%.

Long-distance transmission, transmission 1080i or 720P signal, the differences are not large, but transmit 1080P signals, on the wire is hard, if not to cross the line of quality, light the screen jump, large areas of erythema phenomenon, there is no signal.

Therefore the choice of long distance lines have to be very cautious. Select, cannot only look at the line of external weight, many looked crude line, just do a thick coat, is actually on line 28, simply cannot transmit 1080P signals. 10 m HDMI cable transfers the best 1080P signals is 24, the line, at least guarantee line 26. 24, route, transmit 1080P signal that can reach 10 m. And 28, the line transmission 1080P signal, even a 10 meters distance cannot guarantee the quality.

Details five: HDMI cabling Shen buried in the wall

A lot of friends in the decoration of the HDMI cable when like prior buried in the wall, which we believe must seriously, unless it is a projector, try to avoid.

If you want to use a computer to a drag-and-II, in his study on the Internet, in the living room watching high-definition, we believe will advance the laying of HDMI cable has a lot of trouble, such as embedded in the wire, if once purchased 28, 30, line, transfer to 1080P programming, Pandora has encountered a problem. At present, the majority of Internet users in the wiring is not a true 1080P signals, to test the quality of HDMI and wire, and so the future really use 1080P signal, only to find cannot transmit, already huizhiwanyi. In addition, HDMI cables only can transmit images and the sound signal to transmit signals such as mouse and keyboard, nominal 10 m wireless keyboard, the real use in the home environment, the distance is 4-5 meters. Therefore, direct connect HDMI cable laying, PC and TV, 4 meters of distance, you can consider that more than 5 meters, there is little practical meaning.