... high-quality video. However, MPEG-2 was shown to deliver sufficiently high quality, so MPEG-3 was conjoined with the existing MPEG-2 specification. The spec now skips from MPEG-2 to MPEG-4. ... into major classes (MPEG-1, MPEG-2, MPEG-4), which are further broken down into sub-classifications called layers . Each major class and layer is optimized for specific real-world applications, ... flourish. From the most complex and exacting command-line applications to dirt-simple, all-in-one GUI applications, a quick search of any MP3-related site will uncover as many approaches to MP3...