RFC 3611 RTCP XR November 2003 the answerer responds with an "rtcp-xr" attribute, the offerer SHOULD send XR blocks for each specified unilateral parameter that was in its offer. For multicast media streams, the inclusion of an "rtcp-xr" attribute with unilateral parameters means that every media recipient SHOULD send the corresponding XR blocks.

2022年4月14日 · 流媒体传输中常用的rtcp包主要有sr／rr／sdes／bye／app／xr，主要由rfc 3611和rfc 3550定义。 而 WEBRTC 视频中常用的 RTCP 包比语音要多很多，语音的 RTCP 主要用于状态传递，统计数据。

RTP Control Protocol Extended Reports (RTCP XR) is a VoIP management control that defines a set of metrics containing information for assessing VoIP call quality and for diagnosing problems. RTCP XR (RFC 3611) extends the RTCP reports defined in RFC 3550 by providing additional VoIP metrics (Quality of Experience).

This document defines an RTP Control Protocol (RTCP) Extended Report. (XR) block that allows the reporting of a simple discard count metric. for use in a range of RTP applications. This is an Internet Standards Track document. This document is …

This document defines the Extended Report (XR) packet type for the RTP Control Protocol (RTCP), and defines how the use of XR packets can be signaled by an application if it employs the Session Description Protocol (SDP). XR packets are composed of report blocks, and seven block types are defined here.

rtt怎么计算？我们采用rtcp-xr方案，其实网关首先会发送一个rtcp-xr的rrtr协议，这个协议里面会包含了网关当前的ntp时间。webrtc客户端收rrtr之后，它会有一些回包策略，比如基于上行带宽、拥塞情况和定时器的因素，它会在一段时间之内给rrtr回包dlrr。

2003年11月1日 · This document defines the Extended Report (XR) packet type for the RTP Control Protocol (RTCP), and defines how the use of XR packets can be signaled by an application if it employs the Session Description Protocol (SDP). XR packets are composed of report blocks, and seven block types are defined here.

在 Webrtc 中，通过 RTCP 我们可以实现发送数据/接收数据的反馈，传输控制如丢包重传、关键帧请求，⽹络指标 RTT、丢包率、抖动的计算及反馈，拥塞控制相关的带宽 反馈，以及⽤户体验相关的⾳视频同步等等。 为了让开发者获取以上数据指标，Webrtc 提供了统⼀的接⼝调用,如在GoogleChrome中,可以通过 RTCPeerConnection.getStats ()或者chrome://webrtc-internals/查看以上指标。 RTCP报文类型. ⽬前 RTCP 主要定义了以下8种类型的报⽂，其中业务场景中主要 …

2025年2月18日 · RFC 3611-2003的标准全文信息,本文档定义了 RTP 控制协议 (RTCP)@ 的扩展报告 (XR) 数据包类型，并定义了应用程序在采用会话描述协议 (SDP) 的情况下如何用信号通知 XR 数据包的使用。 XR数据包由报告块@组成，这里定义了七种块类型。 扩展报告格式的目的是传达补充六个统计信息的信息，这些统.

RTP Control Protocol (RTCP) Extended Report (XR) Blocks for Summary Statistics Metrics Reporting . This document defines three RTP Control Protocol (RTCP) Extended. Report (XR) blocks that allow the reporting of loss, duplication, and. discard summary statistics metrics in a range of RTP applications. This is an Internet Standards Track document.