One document matched: draft-huang-xrblock-rtcp-xr-decodability-02.xml
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<rfc category="std" docName="draft-huang-xrblock-rtcp-xr-decodability-02" ipr="trust200902">
<front>
<title abbrev=" RTCP XR Decodability Report Blocks">RTCP XR Report Block
for TS Decodability Statistics Metric Reporting</title>
<author fullname="Rachel Huang" initials="R." surname="Huang">
<organization>Huawei</organization>
<address>
<postal>
<street>101 Software Avenue, Yuhua District</street>
<city>Nanjing</city>
<code>210012</code>
<country>China</country>
</postal>
<email>rachel.huang@huawei.com</email>
</address>
</author>
<author fullname="Qin Wu" initials="Q." surname="Wu">
<organization>Huawei</organization>
<address>
<postal>
<street>101 Software Avenue, Yuhua District</street>
<city>Nanjing</city>
<region>Jiangsu</region>
<code>210012</code>
<country>China</country>
</postal>
<email>bill.wu@huawei.com</email>
</address>
</author>
<author fullname="Hitoshi Asaeda" initials="H." surname="Asaeda">
<organization>Keio University</organization>
<address>
<postal>
<street>Graduate School of Media and Governance 5322 Endo</street>
<city>Fujisawa</city>
<region>Kanagawa</region>
<code>252-0882</code>
<country>Japan</country>
</postal>
<email>asaeda@wide.ad.jp</email>
</address>
</author>
<author fullname="Glen Zorn" initials="G." surname="Zorn" role="editor">
<organization>Network Zen</organization>
<address>
<postal>
<street>227/358 Thanon Sanphawut</street>
<city>Bang Na</city>
<region>Bangkok</region>
<code>10260</code>
<country>Thailand</country>
</postal>
<phone>+66 (0) 87-040-4617</phone>
<email>glenzorn@gmail.com</email>
</address>
</author>
<date year="2012"/>
<abstract>
<t>Transport Stream is a standard container format used in the transmission and storage of multimedia data.
This document defines an RTCP XR Report Block that allows the
reporting of decodability statistics metrics related to transmissions in Transport
Stream format.</t>
</abstract>
</front>
<middle>
<section title="Introduction">
<t>This draft defines a new block type to augment those defined in <xref
target="RFC3611"></xref> for use with Transport Stream (TS) <xref target="ISO-IEC.13818-1.2007"/>.
The new block type
supports reporting on the consistency of transport streams <xref
target="ETSI"></xref> by checking TS header information. This new block
type can be useful for identifying the existence, and characterizing the
severity, of a packet transport problem which may affect users'
perception of a service delivered over RTP; it may also be useful for verifying
the continued correct operation of an existing system management and
providing accurate measures of TS quality for
operators.</t>
<t>The new report block is in compliance with the monitoring
architecture specified in <xref target="RFC6390"></xref>.
The
metric is applicable to any type of RTP application that uses the TS
standard format for transmission and storage of multimedia
data.</t>
</section>
<section title="Terminology">
<section title="Standards Language">
<t>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 <xref
target="RFC2119">RFC 2119</xref>.</t>
<t>In addition, the following terms are defined:</t>
</section>
<section title="Acronyms">
<t><list style="hanging">
<t hangText="SSRC"><vspace blankLines="0" /> <xref
target="RFC3550">Synchronization Source</xref> <vspace
blankLines="1" /></t>
<t hangText="TS"><vspace blankLines="0" /> <xref
target="ISO-IEC.13818-1.2007">Transport Stream</xref></t>
</list></t>
</section>
</section>
<section anchor="TDM" title="TR 101 290 Decodability Statistics Metric Report Block">
<t>This block reports decodability statistics metrics beyond the
information carried in the standard RTCP packet format. Information is
recorded about basic monitoring parameters necessary to ensure that the
TS can be decoded including the number of Transport Stream
Synchronization Losses, Sync byte errors, Continuity count errors, and
continuous monitoring parameters including Transport errors, Program
Clock Reference (PCR) errors, PCR repetition errors, PCR discontinuity
indicator errors, and Presentation Time Stamp (PTS) errors <xref
target="ETSI"></xref>. Such information can be useful for network
management and real time application quality monitoring. <vspace
blankLines="1" />Note that this metric report block is not only
applicable to MPEG-2 transport streams <xref target="RFC2250"></xref>, but is
also applicable to any other codec data encoded using the TS format.
<vspace blankLines="1" />
The Decodability Metrics Block has the following format:
<figure>
<artwork>
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
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| BT=TBD | rvd | block length |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| SSRC of source |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| begin_seq | end_seq |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Number of TSs |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Transport Stream Synchronization Losses |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Sync byte errors |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Continuity count errors |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Transport errors |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| PCR errors |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| PCR repetition errors |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| PCR discontinuity indicator errors |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| PTS errors |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
</artwork>
</figure> <list style="hanging">
<t hangText="block type (BT): 8 bits"><vspace blankLines="0" /> A TR
101 290 decodability metrics report block is identified by the
constant <TDM>. <vspace blankLines="1" /></t>
<t hangText="rvd: 8 bits"><vspace blankLines="0" /> This field is
reserved for future definition. In the absence of such a definition,
the bits in this field MUST be set to zero and SHOULD be ignored by
the receiver. <vspace blankLines="1" /></t>
<t hangText="block length: 16 bits"><vspace blankLines="0" /> The
constant 11, in accordance with the definition of this field in
Section 3 of <xref target="RFC3611">RFC 3611</xref>. <vspace
blankLines="1" /></t>
<t hangText="SSRC of source: 32 bits"><vspace blankLines="0" /> As
defined in Section 4.1 of <xref target="RFC3611"></xref>. <vspace
blankLines="1" /></t>
<t hangText="begin_seq: 16 bits"><vspace blankLines="0" /> As
defined in Section 4.1 of <xref target="RFC3611"></xref>. <vspace
blankLines="1" /></t>
<t hangText="end_seq: 16 bits"><vspace blankLines="0" /> As defined
in Section 4.1 of <xref target="RFC3611"></xref>. <vspace
blankLines="1" /></t>
<t hangText="Number of TSs: 32 bits"><vspace blankLines="0" />
Number of Transport Streams in the above sequence number interval.
<vspace blankLines="1" /></t>
<t
hangText="Transport Stream Synchronization Losses: 32 bits"><vspace
blankLines="0" /> Number of TS Synchronization Losses
in the above sequence number interval. <vspace blankLines="1" /></t>
<t hangText="Sync byte errors: 32 bits"><vspace blankLines="0" />
Number of TS sync byte errors in the above sequence number
interval.<vspace blankLines="1" /></t>
<t hangText="Continuity count error: 32 bits"><vspace
blankLines="0" /> Number of Transport Continuity count errors in the
above sequence number interval. <vspace blankLines="1" /></t>
<t hangText="Transport errors: 32 bits"><vspace blankLines="0" />
Number of Transport errors in the above sequence number interval.
<vspace blankLines="1" /></t>
<t hangText="PCR errors: 32 bits "><vspace blankLines="0" /> Number
of PCR errors in the above sequence number interval. <vspace
blankLines="1" /></t>
<t hangText="PCR repetition errors: 32 bits"><vspace
blankLines="0" /> Number of Transport PCR repetition errors in the
above sequence number interval. <vspace blankLines="1" /></t>
<t hangText="PCR discontinuity indicator errors: 32 bits"><vspace
blankLines="0" /> Number of PCR discontinuity indicator errors in
the above sequence number interval. <vspace blankLines="1" /></t>
<t hangText="PTS errors: 32 bits"><vspace blankLines="0" /> Number
of PTS errors in the above sequence number interval. <vspace
blankLines="1" /></t>
</list></t>
</section>
<section title="SDP Signaling">
<t>One new parameter is defined for the report block defined in
this document to be used with Session Description Protocol (SDP) <xref
target="RFC4566"></xref> using the Augmented Backus-Naur Form (ABNF)
<xref target="RFC5234"></xref>. It has the following syntax within
the "rtcp-xr" attribute <xref target="RFC3611"></xref>: <figure
align="left">
<artwork>
rtcp-xr-attrib = "a=rtcp-xr:"
[xr-format *(SP xr-format)] CRLF
xr-format = decodability-metrics
decodability-metrics = "decodability-metrics"
</artwork>
</figure> Refer to Section 5.1 of <xref target="RFC3611">RFC
3611</xref> for a detailed description and the full syntax of the
"rtcp-xr" attribute.</t>
</section>
<section title="IANA Considerations">
<t>New report block types for RTCP XR are subject to IANA registration.
For general guidelines on IANA allocations for RTCP XR, refer to <xref
target="RFC3611">Section 6.2 of</xref>. <vspace blankLines="1" /> This
document assigns one new block type value in the RTCP XR Block Type
Registry: <list>
<t><list hangIndent="12" style="hanging">
<t hangText="Name:">TDM</t>
<t hangText="Long Name:">TR 101 290 Decodability Metrics</t>
<t hangText="Value"><TDM></t>
<t hangText="Reference:">section 3<vspace blankLines="1" /></t>
</list></t>
</list> This document also registers one SDP <xref
target="RFC4566"></xref> parameter for the "rtcp-xr" attribute in the
RTCP XR SDP Parameters Registry: <list>
<t><list style="symbols">
<t>“decodability-metrics”</t>
</list></t>
</list> <vspace blankLines="1" /> The contact information for the
registrations is: <figure align="center">
<artwork>
Rachel Huang
rachel.huang@huawei.com
101 Software Avenue, Yuhua District
Nanjing, JiangSu 210012 China
</artwork>
</figure></t>
</section>
<section title="Security Considerations">
<t>This proposed RTCP XR report block introduces no new security
considerations beyond those described in <xref
target="RFC3611"></xref>.</t>
</section>
</middle>
<back>
<references title="Normative References">
&rfc2250;
&rfc3611;
&rfc2119;
&rfc4566;
&rfc5234;
&rfc3550;
<reference anchor="ETSI">
<front>
<title>Digital Video Broadcasting (DVB); Measurement guidelines for
DVB systems</title>
<author>
<organization>ETSI</organization>
</author>
<date year="2001" />
</front>
<seriesInfo name="Technical Report" value="TR 101 290" />
</reference>
<reference anchor="ISO-IEC.13818-1.2007">
<front>
<title>Information technology - Generic coding of moving pictures
and associated audio information: Systems</title>
<author>
<organization>International Organization for
Standardization</organization>
</author>
<date month="October" year="2007" />
</front>
<seriesInfo name="ISO" value="International Standard 13818-1" />
</reference>
</references>
<references title="Informative References">
&rfc6390;
</references>
</back>
</rfc>
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