信息技术 - UPnP设备架构 - 第26-11部分:电话设备控制协议 - 第2级 - 媒体管理服务

[中文适用范围]： 此服务定义符合 [1] 标准。它定义了一种服务类型，本文称为媒体管理 (MediaManagement) 服务。媒体管理服务支持在电话控制点 (TelCP) 的控制下，在电话客户端 (TC) 上建立媒体会话。此服务提供以下功能：建立媒体会话，以便在 TC 和 TS 之间发送和/或接收媒体流。为了建立媒体会话，媒体管理服务为 TelCP 提供了一个接口，用于协商 TC 和 TS 之间的媒体功能（例如，编解码器类型、IP 地址、端口号等）。这确保 TelCP 能够选择一组通用的媒体功能，用于在 TS 和 TC 之间发送和/或接收媒体流。媒体会话建立后，TC 将根据 TC 和 TS 之间协商的媒体功能开始发送和/或接收媒体流。修改现有媒体会话媒体功能的机制。例如，如果创建了一个用于发送和接收音频媒体流的媒体会话，则可以修改该媒体会话以发送和接收视频媒体流。终止媒体会话的机制。 [外文原描述]： ISO/IEC 29341-26-11:2017 is compliant with [1]. It defines a service type referred to herein as the MediaManagement service. The MediaManagement service enables the feature to set-up a media session on a Telephony Client (TC), under the control of a Telephony Control Point (TelCP). This service provides the following functions: - Set up a media session to send and/or receive media streams between a TC and a TS. To set up a media session, The MediaManagement service provides an interface for a TelCP to negotiate the media capabilities (e.g., codec types, IP address, port number etc.) between a TC and a TS. This ensures a TelCP to select a common set of the media capabilities to be used to send and/or receive media streams between a TS and a TC. After the media session is established, the TC starts sending and/or receiving media streams based on the media chapabilities negotiated between the TC and the TS. - The mechanism to modify the media capabilities of an existing media session. For instance, if a media session is created for sending and receiving an audio media stream, it is possible to modify the media session for sending and receiving a video media stream. - The mechanism to terminate a media session.