One document matched: draft-huang-xrblock-rtcp-xr-decodability-05.xml

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<rfc category="std" docName="draft-huang-xrblock-rtcp-xr-decodability-05"
     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." role="editor" surname="Zorn">
      <organization>Network Zen</organization>

      <address>
        <postal>
          <street>227/358 Thanon Sanphawut</street>

          <city>Bang Na, Bangkok</city>

          <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. Unicast/Multicast/Broadcast
      MPEG-TS over RTP is widely adopted in the IPTV deployment. This document
      defines an RTCP XR Report Block that allows the reporting of
      decodability statistics metrics related to transmissions of MPEG-TS over
      RTP.</t>
    </abstract>
  </front>

  <middle>
    <section title="Introduction">
      <t> The European Telecommunications Standards Institute (ETSI) has
      defined a set of syntax and information consistency tests and resulting
      indicators <xref target="ETSI"></xref> recommended for the monitoring of
      MPEG-2 Transport Streams (TS) <xref
      target="ISO-IEC.13818-1.2007"></xref>. The tests and corresponding
      indicators are grouped according to priority: <vspace
      blankLines="1" /><list style="symbols">
          <t>First priority - Necessary for de-codability (basic
          monitoring)</t>

          <t>Second priority - Recommended for continuous or periodic
          monitoring </t>

          <t>Third priority - Recommended for application-dependant monitoring
          </t>
        </list></t>

      <t>This draft is based on information consistency tests and resulting
      indicators in the <xref target="ETSI"></xref> and 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"></xref>.
      The new block type supports reporting of the number of each indicator in
      the first and second priority;third priority indicators are not
      supported. This new block type can be useful for measuring content
      stream or TS quality by checking TS header information [ETSI] and
      identifying the existence, and characterizing the severity, of bitstream
      packetization 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. </t>

      <t>The new report block is in compliance with the monitoring
      architecture specified in <xref target="MONARCH"></xref> and the
      Performance Metrics Framework <xref target="RFC6390"></xref>. The metric
      is applicable to any type of RTP application that uses TS standard
      format for container of multimedia data, for example MPEG4 TS content
      over RTP.</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>
      </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. It defines eight
      metrics based on ETSI TR 101 290. Information is reported about basic
      monitoring parameters necessary to ensure that the TS can be decoded
      including:<vspace blankLines="1" /><list style="symbols">
          <t>Transport Stream Synchronization Losses</t>

          <t>Sync byte errors</t>

          <t>Continuity count errors<vspace blankLines="1" /></t>
        </list>and continuous monitoring parameters including:<vspace
      blankLines="1" /><list style="symbols">
          <t>Transport errors</t>

          <t>Program Clock Reference (PCR) errors</t>

          <t>PCR repetition errors</t>

          <t>PCR discontinuity indicator errors</t>

          <t>Presentation Time Stamp (PTS) errors<vspace blankLines="1" /></t>
        </list>The other parameters are ignored since they are not applied to
      all the MPEG implentations. For further information on these parameters,
      see <xref target="ETSI"></xref><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                         |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|                      TS_sync_loss_count                       |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|                      Sync_byte_error_count                    |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|                  Continuity_count_error_count                 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|                      Transport_error_count                    |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|                        PCR_error_count                        |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|                   PCR_repetition_error_count                  |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|            PCR_discontinuity_indicator_error_count            |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|                       PTS_error_count                         |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
</artwork>
        </figure> <list style="hanging">
          <t hangText="block type (BT): 8 bits"><vspace blankLines="1" /> 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="1" /> 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="1" /> 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="1" /> As
          defined in Section 4.1 of <xref target="RFC3611"></xref>. <vspace
          blankLines="1" /></t>

          <t hangText="begin_seq: 16 bits"><vspace blankLines="1" /> As
          defined in Section 4.1 of <xref target="RFC3611"></xref>. <vspace
          blankLines="1" /></t>

          <t hangText="end_seq: 16 bits"><vspace blankLines="1" /> As defined
          in Section 4.1 of <xref target="RFC3611"></xref>. <vspace
          blankLines="1" /></t>

          <t hangText="Number of TSs: 32 bits"><vspace blankLines="1" />
          Number of TS in the above sequence number interval. <vspace
          blankLines="1" /></t>

          <t hangText="TS_sync_loss_count: 32 bits"><vspace blankLines="1" />
          Number of TS_sync_loss errors in the above sequence number interval.
          <vspace blankLines="1" /></t>

          <t hangText="Sync_byte_error_count: 32 bits"><vspace
          blankLines="1" /> Number of sync_byte_errors in the above sequence
          number interval.<vspace blankLines="1" /></t>

          <t hangText="Continuity_count_error_count: 32 bits"><vspace
          blankLines="1" /> Number of Continuity_count_errors in the above
          sequence number interval. <vspace blankLines="1" /></t>

          <t hangText="Transport_error_count: 32 bits"><vspace
          blankLines="1" /> Number of Transport_errors in the above sequence
          number interval. <vspace blankLines="1" /></t>

          <t hangText="PCR_error_count: 32 bits "><vspace blankLines="1" />
          Number of PCR_errors in the above sequence number interval. <vspace
          blankLines="1" /></t>

          <t hangText="PCR_repetition_error_count: 32 bits"><vspace
          blankLines="1" /> Number of PCR_repetition_errors in the above
          sequence number interval. <vspace blankLines="1" /></t>

          <t
          hangText="PCR_discontinuity_indicator_error_count: 32 bits"><vspace
          blankLines="1" /> Number of PCR_discontinuity_indicator_errors in
          the above sequence number interval. <vspace blankLines="1" /></t>

          <t hangText="PTS_error_count: 32 bits"><vspace blankLines="1" />
          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> parameters for the "rtcp-xr" attribute in the
      RTCP XR SDP Parameter 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>
    </references>

    <references title="Informative References">
      <reference anchor="MONARCH">
        <front>
          <title>Monitoring Architectures for RTP</title>

          <author fullname="Qin Wu" initials="Q." surname="Wu">
            <organization></organization>
          </author>

          <author fullname="Geoff Hunt" initials="G." surname="Hunt">
            <organization></organization>
          </author>

          <author fullname="Philip Arden" initials="P.">
            <organization></organization>
          </author>

          <date month="June" year="2012" />
        </front>

        <seriesInfo name="ID" value="draft-ietf-avtcore-monarch-17" />

        <format type="TXT" />
      </reference>

      <reference anchor="RFC6390">
        <front>
          <title>Guidelines for Considering New Performance Metric
          Development</title>

          <author fullname="Alan Clark " initials="A." surname="Clark">
            <organization>Telchemy Incorporated</organization>
          </author>

          <author fullname="Benoit Claise " initials="B." surname="Claise">
            <organization abbrev="Cisco Systems, Inc."></organization>

            <address>
              <postal>
                <street>De Kleetlaan 6a b1</street>

                <city>Diegem</city>

                <code>1831</code>

                <country>Belgium</country>
              </postal>

              <phone>+32 2 704 5622</phone>

              <email>bclaise@cisco.com</email>
            </address>
          </author>

          <date month="October" year="2011" />
        </front>

        <seriesInfo name="BCP" value="170" />

        <seriesInfo name="RFC" value="6390" />
      </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>
  </back>
</rfc>