Pojęcia - DASH 2
0 21 词汇卡 michalesq
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Media Presentation
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collection of data that establishes a bounded or unbounded presentation of media content
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Media Presentation Description - MPD
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formalized description for a Media Presentation for the purpose of providing a streaming service
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Media Presentation timeline
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concatenation of the timeline of all Periods which itself is common to all Representations in the Period
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Media Segment
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Segment that complies with media format in use and enables playback when combined with zero or more preceding segments, and an Initialization Segment (if any)
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media stream
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encoded version of a media content component
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Media Subsegment
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Subsegment that only contains media data but no Segment Index
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message
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part of an event containing information that is exclusively handled by the event handler
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MPD start time
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approximate presentation start time of a Media Segment signalled in MPD
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MPD duration
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approximate presentation duration of a Media Segment signalled in MPD
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Period
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interval of the Media Presentation, where a contiguous sequence of all Periods constitutes the Media Presentation
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presentation time
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time associated to an access unit that maps it to the Media Presentation timeline
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remote element entity
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entity that contains one or more elements and is referenced in the MPD with an HTTP-URL contained in an @xlink: href attribute
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Representation
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collection and encapsulation of one or more media streams in a delivery format and associated with descriptive metadata
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Segment
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unit of data associated with an HTTP-URL and optionally a byte range that are specified by an MPD
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Segment availability start time
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latest time instant in wall-clock time at which a Segment becomes an available Segment
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adjusted Segment availability start time
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time instant in wall-clock time at which a Segment becomes an available Segment
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Segment availability end time
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time instant in wall-clock time at which a Segment ceases to be an available Segment
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Segment Index
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compact index of the time range to byte range mapping within a Media Segment separately from the MPD
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stream access point - SAP
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position in a Representation enabling playback of a media stream to be started using only the information contained in Representation data starting from that position onwards (preceded by initializing data in the Initialization Segment, if any)
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Sub-Representation
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part of a Representation described in the MPD that is present in the entire Period
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Subsegment
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unit within Media Segments that is indexed by a Segment Index
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