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