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Word Count: 650
Whats the quality of DVD-Video DVD has the capability to produce near-studio-quality video and better-than-CD-quality audio DVD is vastly superior to consumer videotape and generally better than laserdisc see 28 However quality depends on many production factors As compression experience and technology improves we will see increasing quality but as production costs decrease we will also see more shoddily produced discs A few low-budget DVDs will even use MPEG-1 encoding which is no better than VHS instead of higher-quality MPEG-2 DVD video is usually encoded from digital studio master tapes to MPEG-2 format The encoding process uses lossy compression that removes redundant information such as areas of the picture that dont change and information thats not readily perceptible by the human eye The resulting video especially when it is complex or changing quickly may sometimes contain visual flaws depending on the processing quality and amount of compression At average rates of 35 Mbps million bitssecond compression artifacts may be occasionally noticeable Higher data rates can result in higher quality with almost no perceptible difference from the master at rates above 6 Mbps As MPEG compression technology improves better quality is being achieved at lower rates Video from DVD sometimes contains visible artifacts such as color banding blurriness blockiness fuzzy dots shimmering missing detail and even effects such as a face that floats behind the rest of the moving picture Its important to understand that the term artifact refers to anything that was not originally present in the picture Artifacts are sometimes caused by poor MPEG encoding but artifacts are more often caused by a poorly adjusted TV bad cables electrical interference sloppy digital noise reduction improper picture enhancement poor film-to-video transfer film grain player faults disc read errors etc Most DVDs exhibit few visible MPEG compression artifacts on a properly configured system If you think otherwise you are misinterpreting what you see Some early DVD demos were not very good but this is simply an
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