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By Jim Taylor

ISBN-10: 0071391851

ISBN-13: 9780071391856

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MiniDisc is supported primarily by Sony, whereas DVD had already garnered the support of over 100 companies when it was introduced. Chapter 8 390 Advantages of MiniDisc over DVD-Video Durability. The optical disc used by the MiniDisc system is more vulnerable than a DVD-ROM disc, but it is encased in a plastic shell to protect it. DVDs are unprotected and subject to scratches. The MiniDisc shell adds significantly to the production cost. The designers of DVD rejected a mandatory shell, but offer caddies or cartridges as an option.

2-Mbps variable-bit-rate MPEG-2 video (at 480 ϫ 480 resolution for NTSC and 480 ϫ 567 resolution for PAL), 2-channel MPEG-2 Layer II audio, text and graphic overlays, and other DVD-like features. Because the data rate is twice as fast, a disc that maximizes the quality will only play half as long: 37 minutes. Therefore, most SVCD players are three-disc changers that automatically switch from one disc to the next to achieve playing times long enough for a feature-length movie. In 2000 the unofficial DSVCD format appeared, which squeezes the tracks tighter together to achieve longer playing times.

Advantages of DVD-ROM over MO Cost. 5-inch MO drive costs $500 to $700, with blank cartridges priced around $30. 25-inch drives cost around $2000, with blank discs in the $40 to $60 range. DVD drives and discs, including blank writable discs, are cheaper, and prices continue to drop. DVD discs can be stamped quickly and cheaply. MO discs generally are not used for prerecorded data because they are expensive and must be recorded individually. Capacity. DVD-ROM discs hold much more than MO discs.

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DVD Comparison by Jim Taylor

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