Capacity of DVD
The DVD specifications emphasize the 12cm disc, which involves single and dual-layer, as well as single and double- sided discs, as shown in the following chart. The generic designations are: DVD-5, DVD-9, DVD-10 and DVD-18. DVD-R is implemented with a capacity of 3.95GB, and DVD-RAM with a capacity of 2.66GB--although now DVD-R’s are 4.7 GB and DVD-RAM’s match that in Type II. Incidentally, we should also note that the DVD specifications include the much-less common 8cm format, with the same layer and side options of the 12cm disc--their corresponding capacities are shown below. The playing time of a DVD Video depends on the average video stream, which depends on the quality of video and audio output. An average video stream of 4.7 Mbits/sec leads to 133 minutes playing time per single layer--a figure often used to mean much more than that.
Single-Layer | Double-Layer
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**DVD-5** **DVD-9**
12cm. 4.7 GB 8.5 GB
8cm. 1.4 GB 2.6 GB
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Double-Side **DVD-10** **DVD-18**
12cm. 9.4 GB 17.0 GB
8cm 2.9 GB 5.3 GB
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New media coming out now has dual layer (8.4 GB of storage capacity)… however it should be noted that this is brand new and will not work on a majority of set-top DVD players.
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