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DVD Demystified

DVD Demystified

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Application Details: <strong>DVD</strong>-Video and <strong>DVD</strong>-Audio<br />

333<br />

<strong>DVD</strong>-SR uses the same general structure as <strong>DVD</strong>-Video but much simplified.<br />

Data is stored in stream recording objects (SROs). Instead of recording<br />

video packs, audio packs, subpicture packs, and so on, <strong>DVD</strong>-SR records<br />

only application data packs. Incoming data, such as MPEG transport<br />

streams, MPEG program streams, Microsoft ASF streams, and so forth, is<br />

chopped into 1998-byte chunks and wrapped in packs. If the recorder is<br />

designed to recognize high-level information in the incoming stream, such<br />

as timestamps, it can generate additional navigation data to support<br />

searching and trick play (fast forward, reverse, slow, and so on).<br />

<strong>DVD</strong>-SR content can be mixed with <strong>DVD</strong>-VR content. They can share<br />

play lists and can have mixed program chains that include both VR cells<br />

and SR cells. Draft versions of the <strong>DVD</strong>-SR format defined streaming<br />

objects, or SOBs, causing much hilarity among those more familiar with the<br />

English language.

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