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HD DVD Structure
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Presentation Objects
| Presentation Object | Data Source | Data Class | Data Type | Player | Decoder |
|---|---|---|---|---|---|
| Primary Video Set | Disc | Primary A/V | Main Video | Primary Video Player | Main Video Decoder |
| Main Audio | Main Audio Decoder | ||||
| Sub Video | Sub Video Decoder | ||||
| Sub Audio | Sub Audio Decoder | ||||
| Sub-picture | Sub-picture Decoder | ||||
| Secondary Video Set | Any(1) | Substitute A/V | Main Video | Secondary Video Player | Main Video Decoder |
| Substitute Audio | Main Audio | Main Audio Decoder | |||
| Secondary A/V | Sub Video | Sub Video Decoder | |||
| Sub Audio | Sub Audio Decoder |
| Advanced Application | File Cache(2) | Markup/Script/Image/Effect Audio/Font | Advanced Application Presentation Engine |
| Advanced Subtitle | File Cache(2) | Markup for Advanced Subtitle/Font/Image | Advanced Subtitle Player |
(1) Disc, Persistent Storage, Network or File Cache
(2) Resource files in a disc, in Persistent Storage, or in a network must be stored once in File Cache before they can be accessed.