信息技术 - UPnP设备架构 - 第20-2部分:音频视频设备控制协议 - 第4级 - 媒体渲染器设备

[中文适用范围]： 本设备规范符合通用即插即用设备架构 (UPSA) 1.0 版 [14]。它定义了一种设备类型，本文称为 MediaRenderer。MediaRenderer 规范定义了一个通用设备模板，可用于实例化任何能够从家庭网络渲染 AV 内容的消费电子 (CE) 设备。它公开了一组渲染控件，其中的控制点可以控制指定 AV 内容的渲染方式。这包括控制各种渲染功能，例如亮度、对比度、音量等。MediaRenderer 的示例实例包括电视和立体声音响系统等传统设备。一些更现代的示例包括 MP3 播放器和电子相框 (EPF) 等数字设备。虽然这些示例通常渲染一种特定类型的内容（例如，电视通常渲染视频内容），但 MediaRenderer 能够支持多种不同的数据格式和传输协议。例如，一个复杂的电视 MediaRenderer 实现还可以支持 MP3 数据，以便其扬声器可用于播放 MP3 音频内容。 MediaRenderer 设备规范非常轻量，易于在 MP3 播放器等低资源设备上实现。然而，它也可以用来展现 PC 等设备的高端功能。功能齐全的 MediaRenderer 具备以下功能：控制各种渲染特性；展现支持的传输协议和数据格式；控制内容流（例如，快进、快退等）（根据传输协议酌情调整）。MediaRenderer 不支持以下控制点：将 AV 内容发送到其他设备 [外文原描述]： ISO/IEC 29341-20-2:2017 is compliant with the Universal Plug and Play Device Architecture version 1.0 [14]. It defines a device type referred to herein as MediaRenderer. The MediaRenderer specification defines a general-purpose device template that can be used to instantiate any Consumer Electronics (CE) device that is capable of rendering AV content from the home network. It exposes a set of rendering controls in which a control point can control how the specified AV content is rendered. This includes controlling various rendering features such as brightness, contrast, volume, etc. Example instances of a MediaRenderer include traditional devices such as TVs and stereo systems. Some more contemporary examples include digital devices such as MP3 players and Electronic Picture Frames (EPFs). Although most of these examples typically render one specific type of content (for example, a TV typically renders video content), a MediaRenderer is able to support a number of different data formats and transfer protocols. For example, a sophisticated implementation of a TV MediaRenderer could also support MP3 data so that its speakers could be used to play MP3 audio content. The MediaRenderer device specification is very lightweight and is easy to implement on low-resource devices such as an MP3 player. However, it can also be used to expose the high-end capabilities of devices such as a PC.