ISO/IEC 23000-18:2018 情報技術  —  マルチメディアアプリケーションフォーマット（MPEG-A）  —  パート18：メディアリンクアプリケーションフォーマット | ページ 6

3.1.1

audiovisual scene

AV scene

set of audiovisual objects together with scene description information that defines their spatial and temporal attributes including behaviours resulting from object and user interactions

3.1.2

binary format for scene

BIFS

coded representation of a parametric scene description format

3.2.1

segment

spatial or temporal unit of multimedia, for example, a temporal segment of video, or a segment of an image

3.2.2

audiovisual segment

element of MPEG-7 multimedia description schemes structure description tools describing a time-continuous arbitrary part (segment) of an audiovisual media

Note 1 to entry: See ISO/IEC 15938-5.

3.2.3

region

spatial unit of multimedia, for example, a 2D spatial region of an image, or a moving region (3.2.4) of video

3.2.4

moving region

region (3.2.3) changing its shape during a video timeline

3.3.1

digital item identification

DII

standard used by MPEG-21 for identification of digital item and their components (3.3.5)

Note 1 to entry: See ISO/IEC 21000-3.

3.3.2

resource

individually identifiable asset such as a video or audio clip, an image or a text

Note 1 to entry: All resources shall be locatable via an unambiguous address.

3.3.3

container

structure that allows items (3.3.4) and/or containers to be grouped

Note 1 to entry: A container itself is not an item; containers are groupings of items and/or containers. Descriptors allow for the"labelling" of containers with information appropriate for the purpose of the grouping.

3.3.4

item

grouping of sub-items and/or components (3.3.5) that are bound to relevant descriptors (3.3.6)

Note 1 to entry: These descriptors contain information about the item. Items may contain choices, which allow them to be customized or configured. Items may be conditional (on predicates asserted by selections defined in the choices). An item that contains no sub-items can be considered a whole. An item that does contain sub-items can be considered a compilation. Items may also contain annotations to their sub-parts.

3.3.5

component

binding of a resource (3.3.2) to a set of descriptors (3.3.6)

Note 1 to entry: These descriptors are information concerning all or part of the specific resource instance. A component itself is not an item; components are building blocks of items. Components may be conditional (see ISO/IEC 21000-3 for details).

3.3.6

descriptor

associates information with the enclosing entity

Note 1 to entry: This information may be a component (such as a thumbnail of an image, or a text component) or a textual statement. Descriptors may be conditional (see ISO/IEC 21000-3 for details).

3.3.7

statement

literal textual value that contains information, but not an asset

3.3.8

annotation

describes a set of information about another identified entity of the model without altering or adding to that entity

Note 1 to entry: The information can take the form of assertions, descriptors and anchors.

3.3.9

anchor

binds descriptors (3.3.6) to a fragment, which corresponds to a specific location or part of a resource (3.3.2)

Note 1 to entry: These descriptors are information concerning all or part of the fragment. Anchors may be conditional.

3.3.10

condition

describes the enclosing entity as being optional, and links it to the selection(s) that affect its inclusion

Note 1 to entry: Multiple predicates within a condition are combined as a conjunction (an AND relationship). Any predicate may be negated within a condition. Multiple conditions associated with a given entity are combined as a disjunction (an OR relationship) when determining whether to include the entity.

3.4.1

core metadata

core descriptive information regarding a resource (3.3.2)

Note 1 to entry: Core descriptive information include, e.g., titles, contributors, genres, technical formats of a given resource.

3.4.2

metadata provider

entity (person or organization) providing metadata

3.5.1

bridget

link from a piece of source content (3.5.2) (e.g. a TV programme) to a piece of destination content (3.5.3) (e.g. an interactive media element such as a photograph, a multimedia presentation, a segment (3.2.1) or another TV programme, an application)

3.5.2

source content

content that is linked to destination content (3.5.3) through a bridget (3.5.1)

Note 1 to entry: The source content is the content from which the bridget originates.

3.5.3

destination content

content that is linked to the source content (3.5.2) through a bridget (3.5.1)

Note 1 to entry: The destination content is the content to which the bridget points.

3.5.4

spatiotemporal scope

information that describe the spatiotemporal region (3.2.3) of the linked source content (3.5.2) or of the linked destination content (3.5.3) that are involved in the link provided by a bridget (3.5.1)

3.5.5

global bridget

bridget (3.5.1) which is active for the whole duration of the source content (3.5.2)

3.5.6

spatiotemporal-aligned bridget

bridget (3.5.1) which is active for a determined spatiotemporal scope (3.5.4) of the source content (3.5.2)