ISO/IEC 14543-5-21:2012 情報技術—ホームエレクトロニックシステム（HES）アーキテクチャ—パート5-21：HESクラス2およびクラス3のインテリジェントなグループ化とリソース共有—アプリケーションプロファイル—AVプロファイル | ページ 6

3.1.1

audio video multicast device group

type of media device group consisting of a media server and media client with multicast capability for an AV multicast playback application

3.1.2

content index service device group

type of media device group which consists of multiple media servers for managing content across multiple media servers in a distributed, collaborative and load-balancing manner

3.1.3

IGRS client

application that invokes the services of one or more connected IGRS devices

Note 1 to entry: Multiple client instances can exist on a network simultaneously.

3.1.4

IGRS device

information device that conforms to the IGRS specification

3.1.5

IGRS dynamic service invocation module

part of the AV application logic to orchestrate the interaction of application services according to the capability of the device or device group involved and to coordinate the service invocation sequence between the media server and media client

Note 1 to entry: The IGRS dynamic service invocation module should be implemented on a media server, a media client or another separate device.

3.1.6

IGRS service

sharable resource encapsulated in an IGRS device by implementing application interfaces and providing services for other IGRS devices

Note 1 to entry: An IGRS service has an invocation interface that meets the requirements of the IGRS specification. These invocation interfaces are described and announced on the network through the IGRS service description specification.

3.1.7

IGRS specification

ISO/IEC 14543-5 series of standards

3.1.8

media client

audio/video device in an IGRS network that possesses multimedia decoding capability

Note 1 to entry: Examples of media client devices include a TV, set top box, etc. The media client may access content on the media server as the destination device in an audio/video application.

3.1.9

media device group

embodiment of device group in an audio/video system and a type of centralised device group defined in ISO/IEC 14543-5-1

Note 1 to entry: A Media device group consists of two classes: content index service device group and audio video multicast device group.

3.1.10

media server

audio/video device in IGRS network that possesses storage and computing capabilities

Note 1 to entry: Examples of media server devices include a PC, network storage server, etc. The media server may provide a network interface to other audio/video devices in order to access content managed by the media server as the source device in an audio/video application.