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A History of the Compact Disc

June 10th, 2013

The compact disc, or CD, was developed as a result of the evolution of LaserDisc technology. Both Philips and Sony scurried to develop prototypes during the 1970s and they later worked together to produce a standard format and player which was eventually made available to the public in 1982.

The Dawn

The origin of the CD has many stories and several trailblazers to thank for experimenting and figuring out ways to make a disk like the CD available to the public. Although many people claim different inventors of the CD, the early credit should go to three men: Emil Berliner for his proving that flat discs work better for transmitting sounds than the round phonograph, Thomas Edison for his invention of the gramophone record and Antonio Rubbianifor his experimentation with digital video.

However the actual CD was not produced until L.Ottens constructed a team of seven people to create an audio disc that produced a better sound quality than the vinyl record. They set out in 1974 and eventually developed a lab that allowed for more testing and prototypes than ever expected.

The original thought was to develop a CD that had a diameter of 20cm, however this was later changed to 11.5cm to match the diagonal length of a cassette tape.

During that time, Sony joined the race by displaying an optical audio disc in the fall of 1976.

Joining forces

In 1976, Philips and Sony created a joint task force of experts and engineers to create a brand new disc. The task force was headed by ToshitadaDoi and KeesSchouhamerImmink, and after a year of testing, they released the Red Book CD-DA standard which was released in 1980 and later recognised as the international standard in 1987.

The small team was split by representatives from each company and each person was there for their own area of expertise. Representatives from Sony focused on error-correction and Philips representatives focused primarily on the manufacturing process.

The first CDs and players

Langenhagen, Germany was the sight of where the first CD was pressed. The Poydor Pressing Operations plant created the CD with a recording of Richard Strauss’s EineAlpensisfonie. Mass production began in 1982. The first musical album to be release on CD was Billy Joel’s 52nd street, which was sold beside Sony’s brand new CD player CDP-101. This release occurred on October 1, 1982 and led to an explosion of sales in CDs and CD players.

Choosing a Way to Back Up Your Computer

May 21st, 2013

When you need to backup your computer (or at least some of the files on it) there are more than a few options available. Some of the most popular backup methods currently are RAID mirrors, external hard drives, network drives, USB flash drives, tape drives, cloud storage, and DVDs. Choosing the right medium for you is a matter of weighing the pros and cons:

  • RAID mirroring requires a second hard disk drive (with closely matched specifications) for each drive you wish to have backed up. It can be an excellent solution as it keeps files perfectly in sync, even while they are running, and is thus an up-to-the-second backup. On the downside it is somewhat costly.
  • External hard drives can be of any size you choose, and can serve as a solid backup option. Like the RAID setup the up front cost can be relatively high, but it does allow you to take your files with you.
  • Network drives are a good option if you have multiple computers to backup files from. They’re more expensive than RAID or external drives because they require a housing which is bootable (usually running a linux distribution) but they can be very useful in multi-system households.
  • USB flash drives are generally only a good backup solution for small jobs or when you need to have ultimate (physical) portability, as their maximum sizes are quite tiny unless you begin to spend an extreme amount of money.
  • Tape drives are an old standard but are are often expensive as they have been phased out by other solutions. The tapes themselves can be a better deal than hard drives, and are portable.
  • Cloud storage has become increasingly exciting in the last couple of years, but as a backup solution it remains very slow. For small projects where you want portability such as working directories and music libraries the cloud is a great solution, but leave the big jobs out until internet speeds improve dramatically.
  • DVDs (generally the re-writable kind, though it’s also possible to use write-once discs) are a good, cheap solution for backing up your system if you are in a position to swap discs out as you go. DVDs offer the least expensive backup costs, and remain faster than cloud storage even with the need to swap discs in an out. Since backing up to DVD is a good, well-rounded and scalable solution that does not require a huge outlay of money, many people rely on it.

Choosing how much to backup is a very personal decision as well. Some people make whole system backups. Others may find that they are only concerned about things like photos, documents, and the like. In some cases a single DVD may be all a person needs to back their vital data up, but in others a great many gigabytes of data will be involved.

Once you know how much space you need you should make arrangements to secure adequate supplies. In the case of DVDs it is usually very cost effective to buy a spindle of discs and a storage case.

Your next step has to be to find a good piece of software. Fortunately you have a wide variety to choose from. Wikipedia has a list of free and paid backup solutions which, while not comprehensive, is a great start. Also be sure to check around on the search engines if you haven’t yet found something that suits your needs.

One good free program from the list is called Cobian Backup. Using this program it is possible to backup just part of your system or the whole thing, and store it on a variety of backups, including the cost-effective DVDs. It offers you a fairly easy to use interface so you can get started quickly. It can serve as a good first program while you are getting used to backups, and while you are looking around at other options.

Finally, when you make a backup the best storage place for it is away from your PC. If you happen to own a fire safe, placing your backups (such as DVDs) in that safe is a good way to ensure you can recover should anything unfortunate befall your computer.

Recovering Data Contained on Damaged Discs

April 29th, 2013

If you have a collection of discs it is almost invariable that some of them will become damaged over time. If your discs do suffer from defects such as scratches, chips, cracks, spotting, or degradation, it may be possible to rescue the data contained on them.

Your first attempts to recover your data should involve a personal attempt to solve the problem. You may spend a little time, but it’s much more affordable to give recovery a shot yourself before paying someone else to do it.

broken-cd

A number of programs have been created over the years which help users of different operating systems to attempt to restore data lost on optical discs. These each work in different ways, but it is very common for very slow low level passes over difficult to read sections of a disc to be used to piece together the data puzzle. When using discs with physical damage (such as cracks or chips), make sure to pay close attention to the recovery process at all times as damage to your drive may result if a disc shatters under the rotational force of the process.

A couple of commonly used Windows programs are CD Recovery Toolbox and Roadkil’s Unstoppable Copier. For linux operating systems ddrescue is a solid option that uses a command line interface. For a variety of Oses (including MacOS) dvdisaster is available, and the bonus for this program is that it can be used as an advanced recovery method, generating data profiles on your media to allow you to have an easier time recovering if anything does happen to a disc after it has been profiled.

Many other options can be found at Wikipedia (some of the programs on this page only deal with non-optical media, so read carefully) or by searching the internet. When using any program, be sure to read the manual carefully in order to give yourself the best possible chance of recovering lost data, and to ensure that you are not attempting to do something the program is not designed to handle.

Professional services can restore from damage of a much more severe nature. Discs that have literally been snapped in half or otherwise shattered can be read by specialized labs. These companies are also your go-to solution when personal computer based solutions fail. Many major cities have businesses that specialize in data recovery. Your search for further assistance should start close to home to save on shipping fees and to minimize potential further damage which can be incurred when mailing discs. If you do not have a good local business, check online for options.

Actual data recovery fees vary widely by the amount of damage, the volume of discs you need restored, and the business you choose. Reputable businesses will offer you a consultation before you pay them. If the company you get in touch with does not, look further.

What Is Digital Rights Management?

March 19th, 2013

Digital Rights Management, or DRM, is a set of user access control technologies used to protect
the intellectual property contained in copyrighted materials from unauthorized use or theft.
Although DRM is widely used today, its history has been fraught with controversy. Although
record companies, publishers and other content providers claim it is necessary to protect
themselves against bankruptcy due to online piracy, its critics contend that it stifles innovation
and inconveniences users, while failing to actually protect against piracy.

In essence, DRM attempts to limit how a consumer can use a product after purchasing it. This
limitation can take the form of controlling access or preventing the user from copying the
material. This is typically achieved by encryption or tag embedding within the copyrighted
material to prevent it from being freely reproduced. Although this keeps users from copying
material and uploading it to file sharing services, it also prevents them from making personal
backup copies for their own archives, an activity which does not explicitly violate the law.

DRM can encompass many different technologies, from CableCard access limitation on cable
television to copy protection on music CDs. One of the earliest widespread uses of DRM
technology was the content scrambling system used in early DVD movies. It essentially rendered
all DVDs unplayable, except on players made by companies that had licensed the content
scrambling technology on their machines.

Within a few years, hackers had found their way to compromise the process and it was no
longer feasible. Although new DRM technologies have also come along, hackers are continually
working to crack them. Part of the limitation on media encryption is also due to legal limitations:
materials exported from the United States cannot contain advanced cryptography at the
level used by the government, because it would present a national security risk were it to be
compromised and fall into the wrong hands.

The main problem with DRM in its application is that it is not immune to hacking. Although
DRM prevents users from copying files to spread, hackers have sidestepped DRM technologies
time and time again. For example, the copy protection technology that was once commonplace
on music CDs not only prevented users from burning the discs to their own personal hard drives,
but even from playing the discs on their computers or in their cars in many cases.

Many consumers were understandably angry over not being able to legitimately use materials
they had paid for without any prior warning of its limitations, and hackers quickly found their
way around the technologies – which in some cases was as simple as marking the “protected”
discs with a black Sharpie. In the end, only the law-abiding users were inconvenienced, and the
law-breakers still found a way to pirate material. And in the world of peer-to-peer file sharing,
all it takes is one single user cracking a DRM technology to spread the material to millions of
others.

Although DRM shows no sign of disappearing since its introduction in the late 90s, it will never
be perfect or beyond controversy. In essence, it bears the same limitations of measures designed
to control the smuggling of guns, drugs or any other restricted material – only those who abide

by the law will be restricted, and outlaws will continue to defy it. As long as there is money to
be made in pirated intellectual property, tech companies and publishers will always be racing to
keep up with the pirates.

How to Safely Clean Your Discs

March 11th, 2013

With proper care and maintenance, rewritable compact discs will remain readable for 50-200
years. However, much of their longevity depends upon how well they are cared for. Following a
few simple steps, it is possible to maximize the lifespans of your discs.

Although it is important to keep your CD-Rs clean, it is very easy to damage them during
cleaning if you do not use the proper methods. Remove dust particles with a soft, clean piece
of cloth. Hold the disc by placing your index finger in the middle hole and pressing your thumb
against the outer edge. Slowly wipe directly outward from the center. Do not swirl the cloth
around the disc or wipe diagonally.

If the disc is sticky or greasy, do not use standard household cleaners as these may abrade or
corrode the disc. Instead, you’ll want to use purpose-built CD/DVD quick-cleaning wipes,
available from a number of manufacturers. You may also want to consider investing in a disc
cleaning kit. Several good models are available from companies such as Maxell and Allsop. Bear
in mind that even if you exercise caution while cleaning your CDs, frequently subjecting the
discs to this routine will still cause damage over time.

While compact discs may be considered highly durable when compared to records and cassettes,
scratches will occur over time during the course of normal handling. Removing scratches with
normal home equipment is difficult because CD resurfacing requires the removal of part of
the outer layer of a CD. This can be accomplished by purchasing a CD resurfacing kit. These
accessories are produced by companies like Scotch and 3M and cost around $20-$30.

Obviously, there is a limit to how many times you can peel off the outer layer of a disc to fix it
before incurring further damage to the disc’s contents as well. If your disc is scratched but still
playable, you may want to consider re-burning its contents onto a new disc and starting fresh
rather than risking the loss of data integrity which can occur while resurfacing.

When considering options for the long term storage of vital data, it is wise to take the fragility of
CD media into account. While at present optical drives continue to support the CD standard, the
third generation (Blu-ray) discs are now in heavy use, making CDs very much a legacy solution
for data storage. As time progresses and the price of solid state media continues to drop it is
likely that solutions based on this technology will become preferred over discs for important files
due to the technology’s lack of reliance on moving parts. In addition, cloud storage is becoming a
better option every day for handling the archival of data important enough to keep of-site.

Recovering Data Contained on Damaged Discs

March 11th, 2013

If you have a collection of discs it is almost invariable that some of them will become damaged over time. If your discs do suffer from defects such as scratches, chips, cracks, spotting, or degradation, it may be possible to rescue the data contained on them.

Your first attempts to recover your data should involve a personal attempt to solve the problem. You may spend a little time, but it’s much more affordable to give recovery a shot yourself before paying someone else to do it.

A number of programs have been created over the years which help users of different operating systems to attempt to restore data lost on optical discs. These each work in different ways, but it is very common for very slow low level passes over difficult to read sections of a disc to be used to piece together the data puzzle. When using discs with physical damage (such as cracks or chips), make sure to pay close attention to the recovery process at all times as damage to your drive may result if a disc shatters under the rotational force of the process.

A couple of commonly used Windows programs are CD Recovery Toolbox and Roadkil’s Unstoppable Copier. For linux operating systems ddrescue is a solid option that uses a command line interface. For a variety of Oses (including MacOS) dvdisaster is available, and the bonus for this program is that it can be used as an advanced recovery method, generating data profiles on your media to allow you to have an easier time recovering if anything does happen to a disc after it has been profiled.

Many other options can be found at Wikipedia (some of the programs on this page only deal with non-optical media, so read carefully) or by searching the internet. When using any program, be sure to read the manual carefully in order to give yourself the best possible chance of recovering lost data, and to ensure that you are not attempting to do something the program is not designed to handle.

Professional services can restore from damage of a much more severe nature. Discs that have literally been snapped in half or otherwise shattered can be read by specialized labs. These companies are also your go-to solution when personal computer based solutions fail. Many major cities have businesses that specialize in data recovery. Your search for further assistance should start close to home to save on shipping fees and to minimize potential further damage which can be incurred when mailing discs. If you do not have a good local business, check online for options.

Actual data recovery fees vary widely by the amount of damage, the volume of discs you need restored, and the business you choose. Reputable businesses will offer you a consultation before you pay them. If the company you get in touch with does not, look further.

Going Digital: Converting from VHS to DVD

February 18th, 2013

There’s a growing number of people who are unable to access their library of VHS video
footage. Players for the old tapes have become increasingly scarce, and loss of quality based on wear
and tear is a real issue with the old medium.

Converting from VHS to a digital video format and saving all of those precious memories on
DVD disc is something that isn’t that difficult to do. It is often possible to handle the conversion at
home with a fairly minor outlay of capital. There are also numerous professional conversion companies
whose facilities have all the tools in them to handle updating a collection to a digital format.

DIY Conversion

There are four components to converting VHS to DVD in a home environment. The first is the
computer with a DVD burner, which costs from $300 on up without a monitor. The second is a player
for the tapes; something that runs $40 plus excluding a TV. The third is a cable to make a connection
from the VCR to the computer; a piece of hardware which may be bundled with software and costs $25
and up. The final component is a piece of conversion software; something with a starting price of free.
Even including a cheap TV and monitor it would be possible to get a conversion setup for around $600.
For those with most of the equipment already, you might spend just $25 plus the (low) cost of blank
DVDs.

Setting up to do the conversion is fairly simple. You just set the VCR and TV up then use the
cable to connect the VCR to the computer. On the computer you install the software. Put the tape to be
converted in the VCR, the DVD to be burned in the optical drive, and then utilize the program to first
transfer the digital video, then (either using the same program or a DVD authoring program) burn the
DVD. The exact specifics will vary depending on your setup, but that’s the gist of it. Simple, and not
terribly expensive.

Getting Expert Help

In the event that you want to avoid your own time and materials to handle the task, there are
plenty of professional services available. Most major cities have businesses which can handle the
conversion of VHS to DVD for a flat fee per tape. Some of them offer video cleaning services which
will enhance the quality of the videos before they are put on tape. This is something that is available as
a DIYer, but is a bit more complicated and might be better left to professionals if it’s something you’re
interested in.

Fees for these services vary by business, and you have to balance the convenience of a local
business with potential price savings available online. If you’re lucky enough to live near a business
with great per-tape prices and a solid offering of video cleanup services, your choice will be easy.

Bear in mind that professional services can offer conversion to DVD from other sources than
VHS. Many will scan photos or negatives, handle 8mm film, and work with MiniDV or Hi8. A good,
professional conversion service is generally very well-rounded, and can help you update your family’s
entire history to an appropriate digital format and store it on DVDs.

How to Safely Clean Your Disc Drivers

January 7th, 2013

Most commercially manufactured disc drives are sturdy and able to perform well with little maintenance. However, if you have a drive for a long time or use it in a workspace with excessive dust in the air (such as in a factory, on a job site, or in an arid climate), it’s probably a good idea to clean it out occasionally. Don’t make the mistake of thinking that cleaning should be a routine though. In this case too much of a good thing is a real issue, as cleaning a drive can result in damage over time.

When a disc drive gets too dirty, it can suffer from increased loading time, skip, or –in extreme cases–  even damage discs. Telltale signs that it’s time to clean your disc drive include an increase in noise as the disc spins and a marked decrease in performance regardless of which disc you attempt to play. If only one disc is loading slowly or skipping then it’s probably the disc that is scratched. If they’re all slowing down then it’s most likely an issue with your drive.

Your first course of action for cleaning out a drive should be to blow air into it. Do not blow with your mouth as doing so will send saliva into the drive. Though a hair dryer with a cool setting can be used, it is too inaccurate for this task. Short, controlled bursts are the best way to clean out a drive and not just move dust around. For best results you should use a can of compressed air or an air bulb.

If you’re feeling brave, you can also take the drive apart and clean the lens yourself. This can damage delicate components and will likely void your warranty if the product is still covered. It’s probably best to take your drive to a repair shop if you do feel the need to do something invasive. A better option is to buy some extra-long cotton swabs, apply rubbing alcohol to one, and insert it directly into the drive to clean the lens. This can be difficult to do correctly and you still have to be somewhat careful, it’s still safer and less involved than taking the drive apart. Determining where the lens in your drive is may be made easier by looking online for the specifications of your unit.

Perhaps the easiest manner to clean a drive is to buy a drive cleaning kit. These are made by many manufacturers and most cost under $20. Each cleaning kit works slightly differently so you’ll need to follow the individual instructions that come with your package.

A comprehensive, professional cleaning at a computer repair shop normally provides the best results. This can be monetarily expensive and will also cost you a day or more of down time as you wait for the cleaning to be carried out. With that in mind, the above methods are good first steps if you find yourself in possession of a poorly functioning disc drive. So before spending the money to have it taken apart and professionally cleaned, you should at least consider trying these simple at-home cleaning methods.

Great Gift Ideas Using Discs

December 10th, 2012

Gifts which have been put together by hand have long been considered by many to be more thoughtful than those just purchased from the store. In the modern world it is possible to create some great digital gifts and put them on a CD or DVD disc in order to give them to your friends, co-workers, or family members. Take a look at these four ideas:

1. A Photo Album

Classic photo albums have been a gift for years. With the advent of computers and in particular digital photography we now have the ability to put a large number of photos onto a disc. While a classic album might have had room for twenty to a hundred photos, you can fit far more images than that onto a disc. So there’s no need to agonize over a choice between the picture of your sister getting soaked by cousin John doing a cannonball at the pool, or the one of her chasing him in the parking lot. You can add them both to the gift, and still have plenty of room for those pictures of her solo at the jazz choir concert.

2. A Music Compilation

Long ago people used to make each other mix-tapes, but now you can make a compilation on disc from all the music you want to share. You can choose from making a disc which will run on a normal CD player (which will get you about 70 minutes of music), but many players now offer the ability to play digital MP3 files as well. This means you can put a huge number of songs on a single disc.

3. A Video From a Special Event

With digital video incredibly commonplace on phones and hand held recorders making a chronicle of an event can be a lot of fun. A great idea for a wedding is to encourage all of your friends and family to film away with their own devices, and to send you the videos they take. A little editing and piecing together of the pieces can make for a fabulous gift to send everyone with  (or even as) the thank-you cards. Video recordings from all kinds of events can be a great way to let people relive memories, or keep them connected when they’re far away.

4. A Collection of Keepsake Messages

Life is full of milestones, and sometimes it’s a great idea to commemorate them with messages from friends, co-workers, and loved ones. Graduations, promotions, retirements, enlistments, and more. The list of special events in our lives go on and on, and making a compilation of video messages from yourself and others related to an important day in someone’s life can really let them know just how you all feel about them.

All of these ideas require a bit of software and some knowledge to implement, but they don’t have to cost much to make, and they have a great deal of sentimental impact when done properly. So if you’re looking for a great idea, consider one of these four ways to make use of discs. You’ll be giving someone a gift they’re not going to forget.

Giving Your Discs That Finishing Touch

November 13th, 2012

Plenty of ways to tighten up your presentation of the discs you create exist, but there’s none that can look quite as nice as putting a design on the discs themselves. In order to do this, however, you will need to secure the correct materials.

You have a number of options available to you. One is to purchase a specialized piece of hardware called a thermal printer. These print on lacquered discs and produce results that are permanent. Inexpensive thermal printers are often only able to do limited printing, however. It is not until you lay out a large amount of money that you can print complex images, and printers that can handle color images are even more expensive than those restricted to monochrome.

Another option is to use labels which are printed out on an ordinary printer and then peeled off and applied to the disc. This is absolutely an option which will allow you to print in full color and give your discs an interesting look for relatively little money. It has a major downside in that labels will eventually peel, and this is not at all good for disc drives. But if all you are looking for is a very affordable way to make discs look good and you have no real longevity requirements, this is a great way to do it.

It is also possible to print directly onto discs using a number of commercial inkjet printers. These printers frequently offer a kind of tray used in the printing of discs. They require special printable media, but these inkjet printable discs are made by many good manufacturers. The largest problem with these discs tends to be that the inks can smear before they are dry or during use. You can use a printer cartridge with pigment inks to avoid this. It is also possible to use a clear fixative spray to put a thin layer over the ink, though when done poorly this can look very spotty, so use caution. All-in-all this is a very good way to handle your finishing needs for a relatively low cost.

No matter how you choose to finish off your discs you will find that each of these methods lends a more professional look to your projects. It doesn’t matter if you are making your discs for business or pleasure, a snappy end result is always something to take pride in.

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