Pojęcia - DASH

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Pytanie - Odpowiedź -
access unit
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unit of a media stream with an assigned Media Presentation time
accessibility
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degree to which a media content or certain media content components are available to as many people as possible
Adaptation Set
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set of interchangeable encoded versions of one or several media content components
asset
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content including media and metadata together with the rights to use the content by the content provider
available Segment
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Segment that is accessible at its assigned HTTP-URL and a possibly assigned byte range that is the request with an HTTP GET results in a reply of the Segment and 2xx status code
Bitstream Switching Segment
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Segment that if present contains essential data to switch to the Representation it is assigned to
complementary Representation
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Representation which complements at least one dependent Representation
continuous media
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media with an inherent notion of time, for example, speech, audio, video, timed text or timed metadata
DASH metric
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metric identified by a key and defined in this part of ISO/IEC 23009
dependent Representation
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Representation for which Segments from its complementary Representations are necessary for presentation and/or decoding of the contained media content components
earliest presentation time
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smallest presentation time of any access unit of a Media Segment or Subsegment for a media stream
event
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aperiodic sparse media-time related auxiliary information to the DASH client or to an application
event stream
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sequence of related events
group
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collection of Adaptation Sets that are not expected to be presented simultaneously
HTTP-URL
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URL with a fixed scheme of “http” or “https”
Index Segment
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Segment that primarily contains indexing information for Media Segments
Initialization Segment
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Segment containing metadata that is necessary to present the media streams encapsulated in Media Segments
media content
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one media content period or a contiguous sequence of media content periods
media content component
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one continuous component of the media content with an assigned media component type that can be encoded individually into a media stream
media content component type
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single type of media content such as audio, video, or text
media content period
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set of media content components that have a common timeline as well as relationships on how they can be presented

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