信息技术 - UPnP设备架构 - 第20-10部分:音频视频设备控制协议 - 第4级 - 音频视频传输服务

[中文适用范围]： 本服务定义与UPnP设备架构版本1.0兼容。该服务类型允许控制音频和视频流的传输。该服务类型为音视频传输控制定义了一个通用模型，适合于通用用户界面。它可以用于控制各种基于光盘、磁带和固态介质的设备，如CD播放器、录像机和MP3播放器。此服务类型的最小实现可以用于控制调谐器。该服务类型与ConnectionManager服务类型相关，后者描述了音视频连接设置程序，以及ContentDirectory服务类型，后者提供了有关存储在媒体上的资源的元信息。AVTransport还提供了一个操作来检索嵌入在资源本身中的任何元数据。此服务类型不提供计划录制功能。 [外文原描述]： ISO/IEC 29341-20-10:2017 is compliant with UPnP Device Architecture version 1.0 [14]. This service type enables control over the transport of audio and video streams. The service type defines a common model for A/V transport control suitable for a generic user interface. It can be used to control a wide variety of disc, tape and solid-state based media devices such as CD players, VCRs and MP3 players. A minimal implementation of this service can be used to control tuners. The service type is related to the ConnectionManager service type, which describes A/V connection setup procedures, and the ContentDirectory service, which offers meta-information about the resource stored on the media. AVTransport also offers an action to retrieve any metadata embedded in the resource itself. This service type does not offer scheduled recording.