What the differences of compact disc and blu-ray disc?
blu rays use higher frequency light (blue rather than red), meaning that each bit of data can take up a smaller area of the disc, as higher frequency allows a higher resolution.
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The prototype of the CD was presented during March 8, 1979, it was made available to the public in 1982.
Answer . A compact disc is a secondary-storage disc for computers. It's capacity is about 700 MegaBytes..
CDs, DVDs and BluRay discs all work in similar ways. The primary difference is the data density on each disc. CD is the lowest density. A DVD can store several times the amoun…t of data on the same surface area and BluRay will store several time the amount of a DVD.
The original prototypes for the compact disc were madeindependently in the mid-to-late 1970s by Phillips and Sony. Thetechnology was in place by 1979 but would not become comm…erciallyavailable until 1982.
A compact disc is a type of optical disc. "Optical disc" is an umbrella term for any type of storage media which uses optical technology (as opposed to magnetic) for data s…torage. This includes but is not limited to DVDs, CDs, H-DVD, blu-ray, laser discs CDRW's, and DVDRW's.
A compact disc, also known as "CD" is simply a disc for CD drives as we know it. it may have music, movies, word documents, picture etc. or no data at al stored on it. A "dr…iver CD" is simply a compact disk with drivers (most likely for computer hardware) stored on it.
A = pi * r^2 A = pi * 6^2 A = 36pi If you are using 3.14 for pi, then ANS : D.) 113.04 cm^2
It would depend on what KIND of CD you want to make. The blank CD itself is the least expensive part; purchased in bulk, they go for 15-20 cents apiece. Assuming you already h…ave a CD/DVD burner and software in your computer (most machines manufactured in the last 10 years include these), you can create CDs of document, picture, music or software files for no additional cost. If you're asking about producing a music CD as a recording of yourself or your band, the cost escalates. You can use a computer as a digital audio workstation (DAW). If you just want to record yourself, all you may need is a USB microphone and the software. Condenser mics with USB outputs are available from most musical instrument vendors (Check out: American Musical Supply, Full Compass, Musicians' Friend, Sweetwater, zZounds, Music 123) For the software, Audacity is a decent first choice and it can be downloaded for free. If you also need to have a second input for a guitar or keyboard, there are small USB/Firewire preamp-interface units with 2 inputs (such as the PreSonus Aspire) also available rather inexpensively from the above vendors. You will also want a good pair of headphones and some speakers that are of better quality than those provided with most computer systems. The above vendors often sell packages that include the interface, a good microphone and the speakers. If you need to record an entire band, you will need a somewhat more sophisticated system. Professional software (Cakewalk, Sonar, SoundForge, ProTools etc.) which includes mastering (post-recording) software to put the finishing touches on your recording. Pro software also allows for plug-ins to add any number of effects, loops and/or instruments (as you can afford them). You will also a better interface (with at least 8 inputs) or, possibly, more than one. Whichever route you need to go, plug in your microphones, connect the interface to a USB or Firewire port and spend some time learning how to use the software. There's lots of on-line help about how to get the most out of your recording rig. Once you have something listenable, You can then 'press' the CDs on your own computer one at a time. Or, you can purchase a CD duplicator (from one of the above vendors or most any computer vendor such as PC Connection or Tiger Direct). Make sure it has the Lightscribe feature so that it can print professional looking labels on the CDs at it duplicates them. Be aware, however, that there's a steep learning curve to all of this and, if you do your recording in a room that is less than acoustically ideal, the finished product may not be much to listen to. Demo quality at best. If you want a professional recording, you will have to book space in a studio, hire the engineer and maybe a producer (a great idea if you can afford it since an experienced, impartial producer can make the difference between marketable music and just plain noise). You will then end up with a master CD from which you can duplicate yourself as noted above. Or, there are any number of companies that will dupe your disks in lots of 250, 500, 1,000 or more, including jewel cases and liners, for reasonable cost. Cost per disk goes down the more you order. You should also be aware that, if you are recording covers of other people's music, you will need to pay royalites. Some newer music cannot be covered without direct permission from the copyright holder (usually a recording company). Performance rights for most music, however, can be purchased on-line through the Harry Fox agency (www.harryfox.com/index.jsp) at 9.5 cents per song per disk with a minimum of 250 disks. Then, of course, you have to actually SELL the disks, but that another whole issue entirely.
Saves the data u write or BURN in to it compact disc is the abb. of CD.
what are the advantages of compact disc
It was used to store various types of media
what is difference between compact discs and digital versalite discs
no they sell appliances that is there main focus gotta go to best buy!
In DVD Players
Yes. Since Blu-Rays are for HDTVs only, they will be a bit more pricier than DVDs.
A hard disk is inside a computer; it holds the operating system and saved files. A compact disc is optical media, such as an audio CD or data CD. CDs are identical in size and… shape to a DVD.
A CD is a small removable and portable plastic based disk with a thin layer of metal that reflects the laser that reads it. The hard disk is solid metal and spins inside a …reader that uses a magnetic field to read the data. It is sensitive to damage and can easily be destroyed just by dropping it.
Blu Ray Discs are able to hold more data which in turn means it is capable of holding HD copies, which if you have a HD TV will mean a greater quality viewing. Regular DVD jus…t has normal resolution although the difference can only be seen if the TV is not an old standard one.