| Price : $69.99 | Post Date : Dec 25, 2011 19:58:53Yamaha NS-AW150W 2-Way Outdoor Speakers (Pair, White)
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HDMI vs DVI, what is the difference? Which one is better? Are DVI and HDMI compatible? And of course, given the choice, which one should you use? The differences (or lack there of) may surprise you. Lets take a look at each of them then evaluate the differences.
Digital Visual Interface (DVI) is a digital standard introduced in 1999 by the Digital Display Working Group (DDWG). It is designed primarily for carrying uncompressed digital video data to a display. Originally the display was a computer monitor but DVI is now commonly used for television as well. One of the main areas of confusion with DVI is the number of different connectors available, which represent different functionality. There are three main connection types for DVI, DVI-D (digital only), DVI-A (analog only) and DVI-I (digital & analog).
High-Definition Multimedia Interface (HDMI), released late in 2002, is an all-digital audio/video interface capable of transmitting uncompressed streams of data similar to DVI. However HDMI also provides the ability to carry audio signals, in addition to video, as well as incorporating HDCP, which is a Digital Rights Management technology.
So what is the difference?
When looking at the differences between HDMI and DVI we find they actually have more in common then differences. They both support digital transmission; they also are based on similar specifications since HDMI was derived from the DVI specification. There are two big differences:
HDMI incorporates content protection called High Definition Content Protection (HDCP).
HDMI supports audio in addition to digital video. (DVI only supports digital video)
Are DVI and HDMI compatible?
Is HDMI compatible with DVI? Since DVI is the predecessor to HDMI, HDMI and DVI are identical as far as video is concerned. Therefore, video backward compatibility exists. However, DVI will not support digital audio. For example, if you have an older DVI connection on your source and a HDMI connector on your display, a HDMI to DVI cable is all that is needed in order to view the video. A separate audio cable (TOSLINK or SPDIF) will be needed to carry the digital audio.
A Warning about Cable length
The HDMI specification does not define a maximum cable length. HDMI 1.3 defined two categories of cables: Category 1 (standard or HDTV) and Category 2 (high-speed or greater than HDTV) regardless, neither HDMI or DVI work well over distances greater then 15 feet. If you need a cable longer then 10 feet you will definitely want to consider top quality cables. For anything greater then 15 feet, some companies offer amplifiers, equalizers and repeaters that can help bridge longer distances.
Which one should I use today?
If available, we recommend HDMI. This is not because it is any better then DVI, only because the industry will heavily push HDMI due to the HDCP Digital Rights Management technology. However you should not expect any difference when moving from DVI to HDMI, therefore if you have DVI already, stick with it until the next standard comes around. A little off topic, but still of relevance is that you may be able to get similar quality video by using your existing Component connections. A common misconception is that Component cannot carry HDTV quality video, which is incorrect. Depending on the components in your system you may get the same or better performance with a Component connection then with a HDMI or DVI connection.
There are many reasons you could be having problems with your LCD TV. The thing to remember is that these things are microprocessor based, just like your computer. That means that at the first sign of trouble you should do the same thing you do with your computer; reboot it! That's right, if your LCD TV is dead ir unresponsive, turn it off with the remote or power button, wait about 10 seconds, then unplug it from the wall. After about 1 minute, plug the power back in and turn the TV on again. With any luck, your TV is now fixed. The next thing that causes problems with all new TVs, not just LCDs is the HDMI connection.
You see, HDMI is a fantastic way to get high definition video, but it's so good that the content providers were worried their stuff would end up out on the Internet in pure form, easy to copy and distribute. To prevent such an occurrence, a copy protection scheme called High Density Copy Protection (HDCP) was developed. This is an electronic data handshake system where the source and display devices have to recognize each other and agree that it's okay to send video. If there is no handshake, or the process gets corrupted in some way, poof, no more video. This problem was extremely prevalent in the early days of HDMI, but has been steadily improving since about the end of 2007 or early 2008.
If you are having problems with your TV, it may actually be an HDMI related issue. Here are some of the problems you might encounter.
Problem 1: No Picture
If you see, or rather don't see this, then shut everything down and then restart the system. Make sure all the connections are in place first. Look at the screen. If you see a resolution notice chances are the DDC line has communicated between source and sink. Good news for you! The problem is likely video related.
Problem 2: Flashes, No Audio, Pink Screen
No audio accompanied by a pink screen is usually indicative of a DDC communication problem. What's that mean for you? To check this, power up the system while all the HDMI cables are connected. If possible, try using shorter cables. Here you need to see if the system works at all. If for some reason the system still fails to come on, try using different inputs. You may find that your cable box will work and your DVD may not or vice versa. This can happen because of stray capacitance on the DDC line inside the HDMI cable. This may actually be caused by the hardware itself. If you think it may be, try getting a DDC line conditioner. Normally, these types of problems completely go away when conditioning is introduced.
Problem 3: Sparkles in the Picture
This is normally a video data transmission problem. Typically data transmission problems with HDMI are cable related. It could be that the cable is underperforming due to its length. This is especially common with cheap cables. Remember the HDMI spec says cable length should not exceed 10 meters. Shortening the cable should improve the signal integrity. Another possibility in this situation is a bad connector. HDMI connectors are notoriously fickle anyway.Try a new cable at each position along the signal path.
Symptom 4: Picture Comes On, Then Goes Off
Typically, this is caused by one of two things. The first is when one or more of the video TMDS channels has a high bit error rate or is not working at all. Next is when the DDC line doesn't quite make it. In that case, the HDCP is not getting a new refresh key. Buy a in a better quality cable with larger wire. When it comes to wire gauge, smaller gauge equals bigger wire diameter. Hence 20 gauge is larger diameter than 24 gauge.
If you're having LCD TV problems, check these things before you call a TV repair company. In many cases you can easily fix the problem yourself without spending a fortune.
Audio Unlimited's 2.4 GHz Black Wireless Indoor/Outdoor Stereo Speaker system 2 Pack with Remotes allows you to enjoy your music almost anywhere without running unsightly cable. This compact speaker is powered by 2.4 GHz technology, which guarantees a strong, clear signal up to 150FT away. The transmitter delivers a powerful signal through walls or any other obstacles in your home or yard, truly offering endless installation options. Just plug in your iPod, computer, stereo, MP3 player or any other device that has a 3.5mm or RCA audio output and enjoy high quality music wherever you want.
Technology has made a huge leap over the past several years. Most of the gadgets that we used, about a decade ago, had long wires and cables that get tangled all the time. Now, many of them are available in wireless. One of these is the speakers that we use and carry around with our radios or compact disc players. But now, you do not have to be annoyed about how short the speakers' wires and cables are that you can not even move them to the next room. Good thing there are wireless digital speakers available already.
These digital wireless speakers work the same way as how radios do. Wireless signals are sent and converted to digital signals which are then transmitted to the speakers. Inside the speakers are digital amplifiers that decode these signals to produce sounds. In short, the analog signals that are sent are converted to digital by the amplifier that is in the speakers. Then we hear the sounds.
One advantage of digital wireless speakers is that the signals can pass through solids so you need not worry about thick walls. There is also a knob that you can use to find the best signal frequency. Digital wireless speakers are also convenient. They can be moved anywhere around your house, even outside. They are most ideal for social events or gatherings that you might be planning in your home.
The only downside about digital wireless speakers is that they still need electricity to be able to work. So it is advisable to place them near an electric outlet. Nevertheless, the pros of digital wireless speakers still outnumber the cons.
Who doesn't love music softly playing in the background especially when you want to relax and just forget about the day's worries? Did you know that the new kinds of speakers can blend perfectly with your decor? Gone are days when you had to set aside quite a bit of space just to get your speakers in the room.
Now, you have in-ceiling speakers, speakers that can actually be mounted on a wall, and they come in all shapes and sizes. The difference between a ceiling speaker and a wall-mounted speaker is that the in-ceiling speaker goes into a hole in the ceiling with just the face being seen. It can sometimes even look like a light or a modern decor.
With wall-mounted speakers, you sort of hang them on the wall. Many times, you will notice them in a wall's top corner, very subtle and discrete. These speakers are lightweight and easy to install. They usually still come in pairs so you can be sure to be that stereo surround effect. The amazing part is that even is you get a tiny, minuscule speaker, it does not mean the sound will not be massive. These speakers are incredibly clear, and can pump up any party with its incredible power.
It's not uncommon nowadays to have piped in music coming from in-ceiling speakers that are barely noticeable. Of course, some of these in-ceiling or wall mounted speakers are really beautiful and deserve to be seen. They have actually become a status symbol for many homeowners.
When choosing your in-ceiling speakers, make sure they are appropriate for the area you are planning to install them in. For instance, you do not need commercial speakers for your kitchen. There are wonderful designs for small areas that will not compromise on quality. There are even speakers that don't look like speakers, and they come in a range of colors and styles that makes it so simple to select one to go with your room.
Now, with such wonderful space-saving designs, and technologically advanced quality, you can have in-ceiling speakers in every room of the house, including your bathroom!
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