This allows instant access to the additional data
or scene. OTP is Opposite Track Path. This
method links the end of one layer to the begin-
ning of the other. The Lead In Area is still on the
inner portion of the disc. There is a Middle Track
Area on both of the layers located on the outer
portion of the layers. The Middle Track Area links
the data on the two layers together. The Lead
Out Area is on the second layer on the inner por-
tion of the disc.
Capacity
Because a stamped DVD can be Dual Layered
and Double Sided, there are four different capac-
ities. Refer to Figure 13. These capacities strict-
ly pertain to raw data. The time available for
Video and Audio has many extra factors that
determine the length of time on each side or
layer. The picture complexity and the amount of
movement in the picture affect compression and
time on a disc. The number of languages affect
the time on a disc. The type and quality of the
Audio has an affect on the time also. It can be
mono, stereo, or AC-3. Therefore, the media
itself determines the capacity in time on the disc.
Figure 13 – DVD Multi-Layered Capacities
8
Figure 12 – PTP and OTP Layout
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