Lesson plan
MPEG user data
The MPEG user data feature provides a means to inject application-specific data into an MPEG elementary stream. User data can be inserted on three different levels: *The sequence level *The group of pictures (GOP) level *The picture data level Applications that process MPEG data do not need to be able to understand data encapsulated in this way, but should be able to preserve it. Examples of information embedded in MPEG streams as user data are: *Aspect ratio information *"Hidden" information per the Active Format Description specification *Closed captioning per the EIA-708 standard
Article summary
The MPEG user data feature provides a means to inject application-specific data into an MPEG elementary stream. User data can be inserted on three different levels: *The sequence level *The group of pictures (GOP) level *The picture data level Applications that process MPEG data do not need to be able to understand data encapsulated in this way, but should be able to preserve it. Examples of information embedded in MPEG streams as user data are: *Aspect ratio information *"Hidden" information per the Active Format Description specification *Closed captioning per the EIA-708 standard
Key claims
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Discussion questions
- Summarise the article in your own words. Which single claim would you verify first, and why?
- Which claim in this article is most likely to be revised as the sources update? How would you check its current status?
- If two sources disagreed about one of these facts, what would you need in order to trust one over the other?
Bibliography
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Key claims and bibliography are generated from the same tracked claims and sources as the article page.