The explosion in digital technology that led to Compact Discs, DVD, personal computers, digital cameras, the Internet and digital television broadcasting relies heavily on a small number of enabling technologies, one of which is the use of Reed-Solomon error correcting codes.
The CRC (cyclic redundancy check) was primarily an error detector, but it did allow some early error correction systems to be implemented.
There are many different CRCs but they all work in much the same way, which is that the data to be protected are divided by the CRC polynomial.
The mathematics of finite fields and sequences seems to be a long way from everyday life, but it happens in the background every time we use a computer and without it, an explanation of modern error correction cannot be given.
Following the myriad of transitions in media production and distribution, is a combination of new technologies that create media and ones that support the consumption of media. Since the creation of media is mostly intended for the audience, the technologies needed to create the media are pretty important even while