Web hosting e commerce - 508 Part IV . Running Applications Several CD
Friday, July 27th, 2007508 Part IV . Running Applications Several CD protection schemes used by record companies are designed to prevent digital piracy, but they are very easy to circumvent in many cases. But should you get caught making MP3s off a protected CD, you can be sued and or arrested (hypothetically speaking). It is quite possible that some of the security on CDs is intentionally weak. It saves development costs and allows the copyright holder to pursue anyone who has ripped the CD because there is no legal means of doing so. But that is just speculation. Relatively few audio CDs come with protection of any kind, particularly those CDs already owned by the world s audiophiles. If you make fair-use copies of materials you own for your own use, you re not likely to have to worry about anything. If you should decide to transport copyrighted works in a public forum (peer-to-peer networks for example), you are rolling the dice. The RIAA (Recording Industry Association of America) and MPAA (Motion Picture Association of America) have both successfully located and sued users including children distributing content illegally online. Exploring Codecs If you want to play a video or audio file, you need the appropriate codec installed and ready for use by your media player. A codec is a software-based compressordecompressor used to take existing digital audio/video data and reduce the size of the content while retaining the quality of the output. If you encounter a media file that you know is a working, playable file and you cannot play the file, you might need to identify and install the proper codec. This often involves installing the proper playback application, such as DivX 5.0.5 for Linux, which installs the MPEG4 codec for video and audio playback. There are many codecs available, so getting the ones you need is usually not an issue. Advances in codec technology have continued to increase the quality of the encoded content, while reducing file size. Fortunately most widely distributed videos and audio files (from news sites, for example) are created using a few commonly used codecs. While there are some commonly used encoding standards, there are also a slew of proprietary codecs in use today as well. This is really a battleground of sorts with each vendor/developer trying to produce the superior standard and obtain the spoils of market share that can follow. For the end user, this means you might have to spend time chasing a variety of playback utilities to handle multiple video and audio formats. Another debate continues: Can digital media match the quality of analog formats? This hardly seems much of a question anymore because DVD has shown the potential for high-quality digital video, and MPEG codecs have made huge strides in digital audio fidelity. The quality of digital media files is very high and getting better all
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