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