Image
EAN-137798057266441   EAN-13 barcode 7798057266441
Product NameElton John & Billy Joel: The Piano Men - Live In Tokyo
LanguageEnglish
CategoryElectronics / Photography: A/V Media: Movie / TV
Short DescriptionDVD
Amazon.comA Buy on Amazon ~ B002BO2RSQ
SKUFRUSED-7798057266441
Price New3.70 US Dollars    (curriencies)
Price Used53.94 US Dollars    (curriencies)
Run Time78 minutes
CastBilly Joel, Elton John
Run Time78 minutes
Weight25 hundredths pounds    (convert)
BindingDvd
FormatMultiple Formats, Color, Import, NTSC
Published06/08/2009
Run Time78 minutes
Long Description1- Your Song 2- Don`Let The Sun Go Down On Me 3- Angry Young Man 4- The Satranger 5- Just The Way You Are 6- Allentown 7- I Go To Extremes 8- My Life 9- The River Of Dreams 10- Candle In The Wind 11- It`S Still Rock Roll To Me 12- Big Shot 13- The Bitch Is Back 14- You May Be Right 15- Piano Man
Similar Items9780738901671: Billy Joel - The Essential Video Collection
0886978459497: Billy Joel Live At Shea Stadium
0828768305799: Journey Live in Houston - The Escape Tour
0828766483598: One Night Only - Rod Stewart Live at Royal Albert Hall
0801213035892: Doobie Brothers Live at the Greek Theatre 1982 Farewell Tour
0674797502391: Red Piano DVD
0603497015320: Elton John - Live in Barcelona
0602517437357: Elton John Elton 60 - Live at Madison Square Garden
0044006088594: Elton John - One Night Only The Greatest Hits Live at Madison Square Garden
0004400608859: Elton John - One Night Only The Greatest Hits Live at Madison Square Garden
Created04-17-2012 7:31:03pm
Modified04-10-2020 4:11:06pm
MD5e3ac8543d097aa494a6c6ee5f13f084b
SHA256777ef52cc6d0ff8eb29ec7a7463f58802dc6f14f678fcbb2a4f49415d8d20262
Search Googleby EAN or by Title
Query Time0.0196359

Article of interest

Barcodes are a graphical representation of information that can be easily read by machines. People read text easy enough but machines find this to be too complex so we use barcodes to simplify the process.

Barcodes can store numbers, letters and all the special characters. What can be stored in the barcode depends on which type of barcode is being used. But the basics of how a barcode works is the same regardless of what type of code it is, what information is stored in the barcode or what type of scanner is being used.

barcode scanIt all starts with the scan. The scanner, regardless of which type you are using, will examine the barcode image. The lines (or blocks in the case of 2D barcodes) will either reflect or absorb light. When we look at the barcode, we tend to see the dark stripes and think of those as the important parts. Those are the parts that absorb the light and the white parts reflect the light. So the scanners tend to see the barcodes in reverse of how we think of them. But the dark and light portions of the code on their own don't automatically become the information stored in the code. In most cases, it is the relative placement and size of each dark and light stripe (or block) that make up the information. There are also special markers that help the scanner know which direction the barcode is facing when it is scanned. This allows the scanning process to work even if the barcode is upside down when it is scanned. The scanner simply processes the scanned data in reverse in this case.

barcode oscolloscopeTaking a look at an oscolloscope screen as a scanner passes over barcode, you can see that the stripes reflect back light and the scanner registers the changes as high and low levels. So what looks like a simple image is really a rather complex set of layered encryption to store the data. The encryption isn't done to hide the information in this case. Instead it is done to make it easy for the machine to read the information. Since the base language of machines is binary (1 and 0) it is easy for them to read this type of information even if it takes several steps to turn this back into something that people can understand.

binaryThe size of each high and low are combined to make binary data. A series of 1 (one) and 0 (zero) values which are strung together then decoded into the actual information. Up to this point, the process is the same for all barcodes regardless of how they are stored. Getting the lines or dots into binary is the easy part for the machine. The next step is to make this binary code into something useful to people. That step depends on  which type of barcode is being scanned. Each type of barcode has its own encoding methode. Just like human languages, what seems to be two similar words (or barcodes in this case) could actually be two very different values even though they have the same basic letters (or bars).

So you can see that the scanning devices need to know not only how to turn the bars or dots into binary, but after they have done that they need to know how to turn that binary string into the original information. But regardless of the encoding process the basic steps are the same. Process the light and dark areas, convert them to binary, decode the binary, pass the information on to the receiving device which is normally a computer program of some sort.

Once the decoded data reaches the computer program, there is no telling how the information is to be used. The grocery store will use the information to keep track of the products you purchased as you go through the register. A manufacturer will use the code to identify where they are storing their parts. And shipping companies use the codes to keep track of the packages they are delivering.

Now that you know a little about the mechanical portion of the process, take some time to learn about the different types of barcode scanners and the different ways the information can be encoded into barcodes.

Close

Search

Close

Share