ISO/IEC 29341-20-3:2017符合UPnP设备体系结构版本1.0[14]。它定义了本文中称为MediaServer的设备类型
MediaServer规范定义了一种通用设备，可用于实例化向家庭网络上的其他UPnP设备提供AV内容（例如媒体）的任何消费电子（CE）设备。它基于UPnP AV架构框架（另一份文档中描述）。它通过ContentDirectory服务公开其内容（有关详细信息，请参阅ContentDirectory服务规范）。 MediaServer还可以提供使用ScheduledRecording服务记录内容的功能（请参阅ScheduledRecording服务规范）。因此，MediaServer可以处理任何特定类型的媒体、任何数据格式和传输协议
MediaServer的示例包括传统设备，如VCR、CD播放机、DVD播放机、音频磁带播放机、静态图像摄像机、摄像机、收音机、电视调谐器和机顶盒。MediaServer的其他示例还包括新的数字设备，如MP3服务器、PVR、智能手机和家用MediaServer，如PC。 尽管这些设备包含各种形式的（AV）内容，但MediaServer（通过ContentDirectory服务）能够以统一一致的方式将这些内容公开给家庭网络。此功能允许MediaServer实例化传统的单功能设备，以及VCR-DVD播放机和通用家用MediaServer等较新的多功能设备，后者包含多种内容，如MPEG2视频、CD音频、MP3和/或WMA音频、JPEG图像等。
MediaServer规范非常轻量级，可以轻松地在低资源设备上实现，如静态图像摄像头或MP3播放器，这些设备希望将其本地内容公开给家庭网络。MediaServer还可用于包含数十GB异构内容的高端家庭MediaServer。有关MediaServer的一些具体示例，请参阅操作原理子条款。

ISO/IEC 29341-20-3:2017 is compliant with the UPnP Device Architecture version 1.0 [14]. It defines a device type referred to herein as MediaServer.
The MediaServer specification defines a general-purpose device that can be used to instantiate any Consumer Electronics (CE) device that provides AV content (for example, media) to other UPnP devices on the home network. It is based on the UPnP AV Architecture Framework (described in another document). It exposes its content via the ContentDirectory service (refer to the ContentDirectory service specification for details). The MediaServer may also provide functionality to record content using the ScheduledRecording service (refer to the ScheduledRecording service specification). As such, the MediaServer can handle any specific type of media, any data format, and transfer protocol.
Example instances of a MediaServer include traditional devices such as VCRs, CD Players, DVD Players, audio-tape players, still-image cameras, camcorders, radios, TV Tuners, and set-top boxes. Additional examples of a MediaServer also include new digital devices such as MP3 servers, PVRs, smartphones and Home MediaServers such as the PC. Although these devices contain diverse (AV) content in one form or another, the MediaServer (via the ContentDirectory service) is able to expose this content to the home network in a uniform and consistent manner. This ability allows the MediaServer to instantiate traditional single-function devices as well as more recent multi-function devices such as VCR-DVD players and the general purpose Home MediaServer, which contains a wide variety of content such as MPEG2 video, CD audio, MP3 and/or WMA audio, JPEG images, etc.
The MediaServer specification is very lightweight and can easily be implemented on low-resource devices such as still-image cameras or MP3 players that want to expose their local content to the home network. The MediaServer can also be used for high-end Home MediaServers that contain dozens of Gigabytes of heterogeneous content. Refer to the Theory Of Operation subclause for some specific examples of the MediaServer.