Data and MP3 Compression: Understanding "Digital" by Matthew Bredel
The MP3 and MP4 generation was generated mostly due to advances in data compression. Let us first take a step back and focus on digital music. There are two types of data in the world: Analog and Digital data. Analog data is real time data, and it is essentially how we perceive the world. ... As you listen to any music, you are listening to an analog signal. ... Every time you recall a analog signal, the results will be varied to some degree. ... Now let's revisit the the analog signal. ... About 5 years ago, all cell phones were analog.

Does High Definition Mean Short Distance? by Cameron Postelwait
Liberty, Justice, and High Def For All The conversation subject of high definition is no longer segregated to the dark smokey rooms of the cultural elite, the same rooms where gas price conspiracies, global domination rituals, and secret handshakes are created. ... DVI-A is an analog signal, DVI-D is a digital signal, and DVI-I is an integrated analog and digital solution. ... This quickly became a popular interface because the integrity of the signal remains true through any transmission, unlike its analog grandfather, who loses little bits of data here and there because of too many...

Brief Explanation of Digital Signal Processing, Compression, Encryption, and File Translation by O G Popa
It happens that many people have no idea what Digital Signal Processing means, although they hear more and more often these words, today. Considering the name, Digital Signal Processing, people are lead towards thinking that this procedure deals with digital signals. ... First, we need an analog-to-digital hardware module to convert the analog signal into digital format--this is typically a “codec”--then we select a specific scanning frequency, to accomplish this task. ... Because we work with audio frequencies, a 40 KHz scanning frequency should be sufficient, and please note that the...

Give Your Old Laptop the High Def Monitor It's Always Wanted by Nathan Kartchner
There it sits: the shiny new high-definition monitor that you just picked up for a killer price. You pull out your laptop with dreams of sharp, hi-res graphics dancing through your head, only to realize that your laptop only has a VGA out port. You could always get a VGA to DVI adapter, but with... The VTBook DVI/VGA Dual Display Video PCMCIA Card (the best, and as far as I can tell, only option as far as a DVI expansion card is concerned) plugs neatly into a PCMCIA slot on the side of your laptop, giving you a DVI digital high-def signal your parents would be proud of.

HDMI Extender: Solution to HDMI Transmission over Long Cables by Jeff Su
Background: The main advantages of HDMI, high definition multimedia interface, over standard analog video transmission is that it is 100 % digital from source to display. However, transmitting HDMI over long distances is not so easy. In this article we will describe some of the issues... Whereas ordinary 60Hz AC signal might travel through the entire cross sectional area of the conductor, a high frequency may only travel along the outer edges of the conduct therefore the “impedance” to signal travel is greater.

Data and MP3 Compression: Why Do We Compress? by Matthew Bredel
In the last article (Data and MP3 Compression: Understanding "Digital"), I explained what a "digital" signal is. Remember, data can be stored as raw, or "analog" signals (like cassette tapes, VHS, or records) or they may be digitized (converted into a series of 1's and 0's) which we can later... We have now reduced the storage size of the song, but in order to decompress the signal requires a lot more signal processing in the same amount of time. ... Not only do you have to store all of that information, but we need to process it and convert it back to its analog signal in a short amount...

HDMI or Component: Which is Best? by Kenny Hemphill
You've just bought a new HDTV, complete with HDMI connector and are delighted that you had the foresight to buy a DVD player with HDMI interface a while ago, even though you couldn't use HDMI at the time. So you can ignore those component outputs and inputs and plug an HDMI cable between your... It's true that convering a DVD signal to analog, sending it over component video and then switching it back to digital in the TV will result in a slight degradation of picture quality. ... However, the degradation in the signal over component is virtually imperceptable and HDMI does introduce...

How to Find the Best LCD Monitor for You by Michael Cottier
Liquid Crystal Display is what LCD stands for, and you thought crystals could only be a solid. Liquid crystals were actually first discovered in 1888 and took more then 100 years to progress into the LCD monitors that we see for computers, laptops, calculators and so one. ... LCD monitors have an AGP port just like CRT’s do, but they also have another port called DVI, which instead of being analog it uses a digital signal. ... As we all know, digital is much better then analog since there is less signal loss.

What is a Video Server? by Wes Fernley
With the convergence of IP Network Video into CCTV (Closed Circuit Television), many are looking to convert their existing CCTV surveillance system into an IP Network Video system. Is this possible? How can it be done? Video Servers have been created to do just that. ... Well in basic terms, a Video Server is a device that can convert an analog signal from an Analog CCTV Surveillance Camera into a digital format similar to IP Network Cameras. ... This allows you to integrate the Video Server into your existing CCTV surveillance system but also convert the signal from each camera to a...

Setting Up Your PC for Dual-monitors: It's Easier Than You Think by Preston Wily
The traditional view of a "PC" If you ask just about anybody what their idea of a "PC system" is they will probably list a tower, a keyboard, a mouse and a monitor. While it is true that these are the essential elements of using a personal computer, it is becoming more and more popular to use... Also, using a VGA-to-DVI adapter will not upscale your signal to a digital signal - it will pass an analog signal through the DVI port. ... Be aware that if you have two DVI monitors that your DVI signal will be downgraded to analog, but the quality loss is almost unnoticable unless you have a...