Internet Engineering Task Force (IETF) A. Clark
Request for Comments: 6776 Telchemy
Category: Standards Track Q. Wu
ISSN: 2070-1721 Huawei
October 2012
Internet Engineering Task Force (IETF) A. Clark
Request for Comments: 6776 Telchemy
Category: Standards Track Q. Wu
ISSN: 2070-1721 Huawei
October 2012
Measurement Identity and Information Reporting Using a Source Description (SDES) Item and an RTCP Extended Report (XR) Block
使用源描述（SDES）项和RTCP扩展报告（XR）块的测量标识和信息报告
Abstract
摘要
This document defines an RTP Control Protocol (RTCP) Source Description (SDES) item and an RTCP Extended Report (XR) block carrying parameters that identify and describe a measurement period to which one or more other RTCP XR blocks may refer.
本文档定义了RTP控制协议（RTCP）源描述（SDES）项和RTCP扩展报告（XR）块，其中包含识别和描述一个或多个其他RTCP XR块可能引用的测量周期的参数。
Status of This Memo
关于下段备忘
This is an Internet Standards Track document.
这是一份互联网标准跟踪文件。
This document is a product of the Internet Engineering Task Force (IETF). It represents the consensus of the IETF community. It has received public review and has been approved for publication by the Internet Engineering Steering Group (IESG). Further information on Internet Standards is available in Section 2 of RFC 5741.
本文件是互联网工程任务组（IETF）的产品。它代表了IETF社区的共识。它已经接受了公众审查，并已被互联网工程指导小组（IESG）批准出版。有关互联网标准的更多信息，请参见RFC 5741第2节。
Information about the current status of this document, any errata, and how to provide feedback on it may be obtained at http://www.rfc-editor.org/info/rfc6776.
有关本文件当前状态、任何勘误表以及如何提供反馈的信息，请访问http://www.rfc-editor.org/info/rfc6776.
Copyright Notice
版权公告
Copyright (c) 2012 IETF Trust and the persons identified as the document authors. All rights reserved.
版权所有（c）2012 IETF信托基金和确定为文件作者的人员。版权所有。
This document is subject to BCP 78 and the IETF Trust's Legal Provisions Relating to IETF Documents (http://trustee.ietf.org/license-info) in effect on the date of publication of this document. Please review these documents carefully, as they describe your rights and restrictions with respect to this document. Code Components extracted from this document must include Simplified BSD License text as described in Section 4.e of the Trust Legal Provisions and are provided without warranty as described in the Simplified BSD License.
本文件受BCP 78和IETF信托有关IETF文件的法律规定的约束(http://trustee.ietf.org/license-info)自本文件出版之日起生效。请仔细阅读这些文件，因为它们描述了您对本文件的权利和限制。从本文件中提取的代码组件必须包括信托法律条款第4.e节中所述的简化BSD许可证文本，并提供简化BSD许可证中所述的无担保。
Table of Contents
目录
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.1. RTCP and RTCP XRs . . . . . . . . . . . . . . . . . . . . . 3
1.2. Performance Metrics Framework . . . . . . . . . . . . . . . 3
1.3. Applicability . . . . . . . . . . . . . . . . . . . . . . . 3
2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.1. Standards Language . . . . . . . . . . . . . . . . . . . . 4
3. Measurement Identity SDES Item . . . . . . . . . . . . . . . . 4
3.1. APSI: Application-Specific Identifier SDES Item . . . . . . 4
4. Measurement Information XR Block . . . . . . . . . . . . . . . 5
4.1. Report Block Structure . . . . . . . . . . . . . . . . . . 5
4.2. Definition of Fields in Measurement Information Report
Block . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
5. IANA Considerations . . . . . . . . . . . . . . . . . . . . . . 7
5.1. New RTCP SDES Item Type Value . . . . . . . . . . . . . . . 7
5.2. New RTCP XR Block Type Value . . . . . . . . . . . . . . . 7
5.3. Contact Information for Registrations . . . . . . . . . . . 7
6. Security Considerations . . . . . . . . . . . . . . . . . . . . 7
7. References . . . . . . . . . . . . . . . . . . . . . . . . . . 8
7.1. Normative References . . . . . . . . . . . . . . . . . . . 8
7.2. Informative References . . . . . . . . . . . . . . . . . . 8
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.1. RTCP and RTCP XRs . . . . . . . . . . . . . . . . . . . . . 3
1.2. Performance Metrics Framework . . . . . . . . . . . . . . . 3
1.3. Applicability . . . . . . . . . . . . . . . . . . . . . . . 3
2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.1. Standards Language . . . . . . . . . . . . . . . . . . . . 4
3. Measurement Identity SDES Item . . . . . . . . . . . . . . . . 4
3.1. APSI: Application-Specific Identifier SDES Item . . . . . . 4
4. Measurement Information XR Block . . . . . . . . . . . . . . . 5
4.1. Report Block Structure . . . . . . . . . . . . . . . . . . 5
4.2. Definition of Fields in Measurement Information Report
Block . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
5. IANA Considerations . . . . . . . . . . . . . . . . . . . . . . 7
5.1. New RTCP SDES Item Type Value . . . . . . . . . . . . . . . 7
5.2. New RTCP XR Block Type Value . . . . . . . . . . . . . . . 7
5.3. Contact Information for Registrations . . . . . . . . . . . 7
6. Security Considerations . . . . . . . . . . . . . . . . . . . . 7
7. References . . . . . . . . . . . . . . . . . . . . . . . . . . 8
7.1. Normative References . . . . . . . . . . . . . . . . . . . 8
7.2. Informative References . . . . . . . . . . . . . . . . . . 8
This document defines one new RTP Control Protocol (RTCP) Source Description (SDES) [RFC3550] item and one new Extended Report (XR) block carrying parameters that identify and describe a measurement period to which one or more other RTCP XR blocks may refer.
本文档定义了一个新的RTP控制协议（RTCP）源描述（SDES）[RFC3550]项和一个新的扩展报告（XR）块，其中包含识别和描述一个或多个其他RTCP XR块可能参考的测量周期的参数。
The SDES item provides a field for an application-specific auxiliary identifier. This identifier may be used to correlate data in XR blocks within an RTP session with data from a non-RTP session.
SDES项为特定于应用程序的辅助标识符提供字段。该标识符可用于将RTP会话内XR块中的数据与来自非RTP会话的数据相关联。
An RTCP Measurement Identity SDES packet may be associated with a set of RTCP XR metrics blocks that share the same application-specific measurement identifier.
RTCP测量标识SDES数据包可与共享同一特定于应用程序的测量标识符的一组RTCP XR度量块相关联。
The XR block does not contain any measurement results (metrics). Instead, it provides information relevant to a measurement reported in one or more other block types, including:
XR块不包含任何测量结果（度量）。相反，它提供与一个或多个其他块类型中报告的测量相关的信息，包括：
o the sequence number of the first packet of the RTP session,
o RTP会话的第一个数据包的序列号，
o the extended sequence numbers of the first packet of the current measurement interval, and the last packet included in the measurement,
o 当前测量间隔的第一个分组和测量中包括的最后一个分组的扩展序列号，
o the duration of the most recent measurement interval, and
o 最近测量间隔的持续时间，以及
o the duration of the interval applicable to cumulative measurements (which may be the duration of the RTP session to date).
o 适用于累积测量的间隔时间（可能是迄今为止RTP会话的持续时间）。
The calculation method of the extended RTP sequence number is provided in the Real-time Transport Protocol (RTP) [RFC3550].
实时传输协议（RTP）[RFC3550]中提供了扩展RTP序列号的计算方法。
The RTCP XR block containing the measurement information is intended to provide a single copy of the information necessary to relate measurement data in the RTCP XR blocks to the stream and measurement period to which they refer. Commonly, multiple other small metric blocks contain measurement data for the same stream and period, and overhead would be large if all of these metric blocks carried duplicated data for measurement identification.
包含测量信息的RTCP XR块旨在提供将RTCP XR块中的测量数据与其引用的流和测量周期关联所需信息的单个副本。通常，多个其他小度量块包含相同流和周期的度量数据，如果所有这些度量块都携带用于度量标识的重复数据，则开销将很大。
The RTCP XR block may be associated with a set of RTCP XR metrics blocks that share the same information relevant to a reported measurement. There may be several such sets in an RTCP packet, in which each set shares the same information relevant to a reported measurement. There may also be RTCP XR blocks in the packet that are not associated with a Measurement Information block, for example, blocks that were defined before the Measurement Identity and information mechanism were introduced by this document.
RTCP XR块可与一组RTCP XR度量块相关联，这些块共享与报告的测量相关的相同信息。RTCP数据包中可能有多个这样的集合，其中每个集合共享与报告的测量相关的相同信息。数据包中还可能存在与测量信息块无关的RTCP XR块，例如，本文档引入测量标识和信息机制之前定义的块。
The use of RTCP for reporting is defined in [RFC3550]. [RFC3611] defines an extensible structure for reporting by using an RTCP XR. [RFC3611] also defines the use of XR blocks. This document defines a new Extended Report block.
[RFC3550]中定义了使用RTCP进行报告。[RFC3611]通过使用RTCP XR定义报告的可扩展结构。[RFC3611]还定义了XR块的使用。此文档定义了一个新的扩展报告块。
The Performance Metrics Framework [RFC6390] provides guidance on the definition and specification of performance metrics. The RTP Monitoring Architectures [MONARCH] provides guidelines for reporting block format using RTCP XR. The SDES item and XR block described in this document are in accordance with [RFC6390] and [MONARCH].
性能指标框架[RFC6390]提供了有关性能指标定义和规范的指导。RTP监控体系结构[Monar]提供了使用RTCP XR报告块格式的指南。本文件中描述的SDES项目和XR块符合[RFC6390]和[Monar]。
The RTCP SDES item and the RTCP XR block defined in this document provide information relevant to the measurements for members of a family of RTCP XR metrics blocks that are designed to use it. To use the mechanism defined here, the RTCP XR block containing measurement information is not required to be in the same RTCP packet as the SDES item containing measurement identity.
本文档中定义的RTCP SDES项目和RTCP XR块提供了与设计用于使用RTCP XR度量块的RTCP XR度量块系列成员的测量相关的信息。要使用此处定义的机制，包含度量信息的RTCP XR块不需要与包含度量标识的SDES项位于同一RTCP数据包中。
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in RFC 2119 [RFC2119].
本文件中的关键词“必须”、“不得”、“要求”、“应”、“不应”、“应”、“不应”、“建议”、“可”和“可选”应按照RFC 2119[RFC2119]中所述进行解释。
This section defines the format of the Measurement Identity SDES item. The SDES item is carried in the RTCP SDES packet. The packet format for the RTCP SDES is defined in Section 6.5 of [RFC3550]. Each SDES packet is composed of a header with fixed-length fields for version, source count, packet type (PT), and length, followed by zero or more SDES items. In the SDES packet, the PT field is set to SDES (202).
本节定义了测量标识SDES项目的格式。SDES项目包含在RTCP SDES数据包中。[RFC3550]第6.5节定义了RTCP SDE的数据包格式。每个SDES数据包都由一个具有固定长度字段（用于版本、源计数、数据包类型（PT）和长度）的标头组成，后跟零个或多个SDES项目。在SDES分组中，PT字段被设置为SDES（202）。
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| APSI=10 | length |application-specific identifier
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| ....
+-+-+-+-+-+-+-+-+
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| APSI=10 | length |application-specific identifier
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| ....
+-+-+-+-+-+-+-+-+
The application-specific identifier is an additional identifier that is useful in the context of a specific application, e.g., an MPEG-2 transport identifier [MPEG2]. This item MUST be ignored by applications that are not configured to make use of it. The identifier is variable length. Its length is described by the length field. The value of the length field does not include the two-octet SDES item header.
应用特定标识符是在特定应用的上下文中有用的附加标识符，例如，MPEG-2传输标识符[MPEG2]。未配置为使用此项的应用程序必须忽略此项。标识符是可变长度的。其长度由长度字段描述。长度字段的值不包括两个八位字节的SDES项目标题。
0 1 2 3
0 1 2 3 4 5 6 7 0 1 2 3 4 5 6 7 0 1 2 3 4 5 6 7 0 1 2 3 4 5 6 7
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| BT=14 | Reserved | block length = 7 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| SSRC of stream source |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Reserved | first sequence number |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| extended first sequence number of interval |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| extended last sequence number |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Measurement Duration (Interval) |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Measurement Duration (Cumulative) - Seconds (bit 0-31) |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Measurement Duration (Cumulative) - Fraction (bit 0-31) |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
0 1 2 3
0 1 2 3 4 5 6 7 0 1 2 3 4 5 6 7 0 1 2 3 4 5 6 7 0 1 2 3 4 5 6 7
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| BT=14 | Reserved | block length = 7 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| SSRC of stream source |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Reserved | first sequence number |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| extended first sequence number of interval |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| extended last sequence number |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Measurement Duration (Interval) |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Measurement Duration (Cumulative) - Seconds (bit 0-31) |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Measurement Duration (Cumulative) - Fraction (bit 0-31) |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Report Block Structure
报表块结构
Block type (BT): 8 bits
块类型（BT）：8位
A Measurement Information Block is identified by the constant 14.
测量信息块由常数14标识。
Reserved: 8 bits
保留：8位
These bits are reserved. They MUST be set to zero by senders and ignored by receivers.
这些位是保留的。发送方必须将它们设置为零，接收方必须忽略它们。
Block Length: 16 bits
块长度：16位
The length of this report block in 32-bit words minus one. For the Measurement Information Block, the block length is equal to 7.
此报表块的长度（32位字减去1）。对于测量信息块，块长度等于7。
SSRC of source: 32 bits
源的SSRC：32位
As defined in Section 4.1 of [RFC3611].
如[RFC3611]第4.1节所定义。
Reserved: 16 bits
保留：16位
These bits are reserved. They MUST be set to zero by senders and ignored by receivers.
这些位是保留的。发送方必须将它们设置为零，接收方必须忽略它们。
First sequence number: 16 bits
第一序列号：16位
The RTP sequence number of the first received RTP packet of the session, used to determine the number of packets contributing to cumulative measurements.
会话的第一个接收到的RTP数据包的RTP序列号，用于确定有助于累积测量的数据包数量。
Extended first sequence number of interval: 32 bits
间隔的扩展第一序列号：32位
The extended RTP sequence number of the first received RTP packet of the current measurement interval. The extended sequence number is expressed as the low 16-bit value containing the sequence number received in an RTP data packet and the most significant 16-bit value containing the corresponding count of sequence number cycles. For additional information on extended sequence numbers, see the "extended highest sequence number received" definition in Section 6.4.1 of RFC 3550 and Appendix A.1 of RFC 3550.
当前测量间隔的第一个接收RTP数据包的扩展RTP序列号。扩展序列号表示为包含在RTP数据分组中接收的序列号的低16位值和包含序列号周期的相应计数的最高有效16位值。有关扩展序列号的更多信息，请参见RFC 3550第6.4.1节和RFC 3550附录A.1中的“收到的扩展最高序列号”定义。
Extended last sequence number: 32 bits
扩展的最后序列号：32位
The extended RTP sequence number of the last received RTP packet that contributed to this measurement. The extended sequence number is expressed as the low 16-bit value containing the sequence number received in an RTP data packet and the most significant 16-bit value containing the corresponding count of sequence number cycles. For additional information on extended sequence numbers, see the "extended highest sequence number received" definition in Section 6.4.1 of RFC 3550 and Appendix A.1 of RFC 3550.
上次接收的RTP数据包的扩展RTP序列号，该数据包促成了此测量。扩展序列号表示为包含在RTP数据分组中接收的序列号的低16位值和包含序列号周期的相应计数的最高有效16位值。有关扩展序列号的更多信息，请参见RFC 3550第6.4.1节和RFC 3550附录A.1中的“收到的扩展最高序列号”定义。
Measurement Duration (Interval): 32 bits
测量持续时间（间隔）：32位
The duration, expressed in units of 1/65536 seconds, of the reporting interval applicable to Interval reports that use this Measurement Information Block. The value of this field can be calculated by the receiver of the RTP media stream, for example, based on received RTP media packets or using the RTCP method described in [RFC3550].
报告间隔的持续时间，以1/65536秒为单位，适用于使用此测量信息块的间隔报告。该字段的值可由RTP媒体流的接收器计算，例如，基于接收到的RTP媒体分组或使用[RFC3550]中描述的RTCP方法。
Measurement Duration (Cumulative): 64 bits
测量持续时间（累积）：64位
The duration of the reporting interval applicable to Cumulative reports that use this Measurement Information Block. The value of this field is represented using a 64-bit NTP-format timestamp as defined in [RFC5905], which is a 64-bit unsigned fixed-point number with the integer part in the first 32 bits and the fractional part in the last 32 bits. It can be calculated by the receiver of the RTP media stream, for example, based on received RTP media packets or using the RTCP method described in [RFC3550].
适用于使用此度量信息块的累积报告的报告间隔的持续时间。该字段的值使用[RFC5905]中定义的64位NTP格式时间戳表示，该时间戳是一个64位无符号定点数字，整数部分在前32位，小数部分在后32位。它可以由RTP媒体流的接收器计算，例如，基于接收到的RTP媒体分组或使用[RFC3550]中描述的RTCP方法。
A new SDES item type for RTCP SDES and a new XR block type for RTCP XR have been registered with IANA. For general guidelines on IANA considerations, refer to [RFC3550] for RTCP SDES and [RFC3611] for RTCP XR.
已向IANA注册RTCP SDE的新SDES项目类型和RTCP XR的新XR块类型。有关IANA注意事项的一般指南，请参考[RFC3550]了解RTCP SDE，参考[RFC3611]了解RTCP XR。
This document adds the Measurement Identity SDES item to the IANA "RTP SDES item types" registry as follows:
本文件将度量标识SDES项目添加到IANA“RTP SDES项目类型”注册表中，如下所示：
abbrev. name value APSI Application-Specific Identifier 10
阿巴雷夫。名称值APSI应用程序特定标识符10
This document assigns the block type value 14 in the IANA "RTCP XR Block Type Registry" to the "Measurement Information Block".
本文件将IANA“RTCP XR块类型注册表”中的块类型值14分配给“测量信息块”。
The contact information for the registrations is:
注册的联系信息为：
Qin Wu (sunseawq@huawei.com) 101 Software Avenue, Yuhua District Nanjing, Jiangsu 210012 China
秦武(sunseawq@huawei.com)中国江苏省南京市雨花区软件大道101号210012
RTCP reports can contain sensitive information, including information about the nature and duration of a session established between two or more endpoints. Therefore, the use of security mechanisms with RTP, as documented in Section 9 of [RFC3550], applies.
RTCP报告可以包含敏感信息，包括有关在两个或多个端点之间建立的会话的性质和持续时间的信息。因此，如[RFC3550]第9节所述，在RTP中使用安全机制适用。
[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", BCP 14, RFC 2119, March 1997.
[RFC2119]Bradner，S.，“RFC中用于表示需求水平的关键词”，BCP 14，RFC 2119，1997年3月。
[RFC3550] Schulzrinne, H., Casner, S., Frederick, R., and V. Jacobson, "RTP: A Transport Protocol for Real-Time Applications", STD 64, RFC 3550, July 2003.
[RFC3550]Schulzrinne，H.，Casner，S.，Frederick，R.，和V.Jacobson，“RTP：实时应用的传输协议”，STD 64，RFC 35502003年7月。
[RFC3611] Friedman, T., Ed., Caceres, R., Ed., and A. Clark, Ed., "RTP Control Protocol Extended Reports (RTCP XR)", RFC 3611, November 2003.
[RFC3611]Friedman，T.，Ed.，Caceres，R.，Ed.，和A.Clark，Ed.，“RTP控制协议扩展报告（RTCP XR）”，RFC 36112003年11月。
[RFC5905] Mills, D., Martin, J., Ed., Burbank, J., and W. Kasch, "Network Time Protocol Version 4: Protocol and Algorithms Specification", RFC 5905, June 2010.
[RFC5905]Mills，D.，Martin，J.，Ed.，Burbank，J.，和W.Kasch，“网络时间协议版本4：协议和算法规范”，RFC 59052010年6月。
[MONARCH] Wu, Q., Hunt, G., and P. Arden, "Monitoring Architectures for RTP", Work in Progress, September 2012.
[Monar]Wu，Q.，Hunt，G.，和P.Arden，“RTP的监控架构”，正在进行的工作，2012年9月。
[MPEG2] ISO/IEC, "Standard 13818-1, Information technology -- Generic coding of moving pictures and associated audio information: Systems", October 2007.
[MPEG2]ISO/IEC，“标准13818-1，信息技术——运动图像和相关音频信息的通用编码：系统”，2007年10月。
[RFC6390] Clark, A. and B. Claise, "Guidelines for Considering New Performance Metric Development", BCP 170, RFC 6390, October 2011.
[RFC6390]Clark，A.和B.Claise，“考虑新性能指标开发的指南”，BCP 170，RFC 63902011年10月。
Authors' Addresses
作者地址
Alan Clark Telchemy Incorporated 2905 Premiere Parkway, Suite 280 Duluth, GA 30097 United States
艾伦·克拉克·泰尔切米公司，美国佐治亚州德卢斯市首映大道2905号280室，邮编30097
EMail: alan.d.clark@telchemy.com
EMail: alan.d.clark@telchemy.com
Qin Wu Huawei 101 Software Avenue, Yuhua District Nanjing, Jiangsu 210012 China
中国江苏省南京市雨花区华为软件大道101号秦武210012
EMail: sunseawq@huawei.com
EMail: sunseawq@huawei.com