PTP

An abbreviation for Parallel Track Path, which is a technique for data organization on dual layer DVD discs. Using the Parallel Track Path (PTP), as opposed to OTP (Opposite Track Path), on a dual-layer DVD, both layers have a Lead-in and a Lead-out area as part of the information area. For each layer, the Lead-in area is located at the inner radius of the disc, and the Lead-out area is located at the outer radius of the disc. This layout structure is comparable with the layout of Compact Disc. Reading of the data is done, like CD, from the inner radius of the disc to the outer radius, for both information layers. The PTP method, for example, can be used for providing artist profiles and other background information in one track along with a movie in the other track, or quick-responding game structures achieved by means of quick access from layer to layer.