draft-ietf-xrblock-rtcp-xr-psi-decodability-01.txt   draft-ietf-xrblock-rtcp-xr-psi-decodability-02.txt 
Network Working Group J. Tong Network Working Group J. Tong
Internet-Draft C. Bi, Ed. Internet-Draft C. Bi, Ed.
Intended status: Standards Track China Telecom Intended status: Standards Track China Telecom
Expires: August 17, 2014 R. Even Expires: October 25, 2014 R. Even
Gesher Erove Ltd Gesher Erove Ltd
Q. Wu, Ed. Q. Wu, Ed.
R. Huang R. Huang
Huawei Huawei
February 13, 2014 April 23, 2014
RTP Control Protocol (RTCP) Extended Report (XR) Block for MPEG2 RTP Control Protocol (RTCP) Extended Report (XR) Block for MPEG2
Transport Stream (TS) Program Specific Information (PSI) Decodability Transport Stream (TS) Program Specific Information (PSI) Decodability
Statistics Metrics reporting Statistics Metrics reporting
draft-ietf-xrblock-rtcp-xr-psi-decodability-01 draft-ietf-xrblock-rtcp-xr-psi-decodability-02
Abstract Abstract
An MPEG2 Transport Stream (TS) is a standard container format used in An MPEG2 Transport Stream (TS) is a standard container format used in
the transmission and storage of multimedia data. Unicast/Multicast the transmission and storage of multimedia data. Unicast/Multicast
MPEG2 TS over RTP is widely deployed in IPTV systems. This document MPEG2 TS over RTP is widely deployed in IPTV systems. This document
defines an RTP Control Protocol (RTCP) Extended Report (XR) Block defines an RTP Control Protocol (RTCP) Extended Report (XR) Block
that allows the reporting of MPEG2 TS decodability statistics metrics that allows the reporting of MPEG2 TS decodability statistics metrics
related to transmissions of MPEG2 TS over RTP. The metrics specified related to transmissions of MPEG2 TS over RTP. The metrics specified
in the RTCP XR Block are related to Program specific information in the RTCP XR Block are related to Program specific information
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Internet-Drafts are working documents of the Internet Engineering Internet-Drafts are working documents of the Internet Engineering
Task Force (IETF). Note that other groups may also distribute Task Force (IETF). Note that other groups may also distribute
working documents as Internet-Drafts. The list of current Internet- working documents as Internet-Drafts. The list of current Internet-
Drafts is at http://datatracker.ietf.org/drafts/current/. Drafts is at http://datatracker.ietf.org/drafts/current/.
Internet-Drafts are draft documents valid for a maximum of six months Internet-Drafts are draft documents valid for a maximum of six months
and may be updated, replaced, or obsoleted by other documents at any and may be updated, replaced, or obsoleted by other documents at any
time. It is inappropriate to use Internet-Drafts as reference time. It is inappropriate to use Internet-Drafts as reference
material or to cite them other than as "work in progress." material or to cite them other than as "work in progress."
This Internet-Draft will expire on August 17, 2014. This Internet-Draft will expire on October 25, 2014.
Copyright Notice Copyright Notice
Copyright (c) 2014 IETF Trust and the persons identified as the Copyright (c) 2014 IETF Trust and the persons identified as the
document authors. All rights reserved. document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents Provisions Relating to IETF Documents
(http://trustee.ietf.org/license-info) in effect on the date of (http://trustee.ietf.org/license-info) in effect on the date of
publication of this document. Please review these documents publication of this document. Please review these documents
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monitoring of MPEG2 Transport Streams [ISO-IEC.13818-1.2007]. The monitoring of MPEG2 Transport Streams [ISO-IEC.13818-1.2007]. The
tests and corresponding indicators are grouped according to priority: tests and corresponding indicators are grouped according to priority:
o First priority - Necessary for decodability (basic monitoring) o First priority - Necessary for decodability (basic monitoring)
o Second priority - Recommended for continuous or periodic o Second priority - Recommended for continuous or periodic
monitoring monitoring
o Third priority - Recommended for application-dependent monitoring o Third priority - Recommended for application-dependent monitoring
This memo is based on information consistency tests and resulting This memo is based on information consistency tests and resulting
indicators defined by ETSI [ETSI] and defines a new block type to indicators defined by ETSI [ETSI] and defines a new block type to
augment those defined in Freidman, et al. [RFC3611] for use with augment those defined in [RFC3611] for use with MPEG2 Transport
MPEG2 Transport Stream (TS) [ISO-IEC.13818-1.2007]. The new block Stream (TS) [ISO-IEC.13818-1.2007]. The new block type supports
type supports reporting of the number of occurrences of each Program reporting of the number of occurrences of each Program Specific
Specific Information (PSI) indicator in the first and second Information (PSI) indicator in the first and second priorities that
priorities that supplements information from PSI independent supplements information from PSI independent Decodability Statistics
Decodability Statistics Metrics Block [RFC6990]; third priority Metrics Block [RFC6990]; third priority indicators are not supported.
indicators are not supported.
1.2. RTCP and RTCP XR Reports 1.2. RTCP and RTCP XR Reports
The use of RTCP for reporting is defined in [RFC3550]. [RFC3611] The use of RTCP for reporting is defined in [RFC3550]. [RFC3611]
defined an extensible structure for reporting using an RTCP Extended defined an extensible structure for reporting using an RTCP Extended
Report (XR). This document defines a new Extended Report block for Report (XR). This document defines a new Extended Report block for
use with [RFC3550] and [RFC3611]. use with [RFC3550] and [RFC3611].
1.3. Performance Metrics Framework 1.3. Performance Metrics Framework
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The MPEG2 TS PSI Decodability Metrics Block is identified by the The MPEG2 TS PSI Decodability Metrics Block is identified by the
constant <MTPD>. constant <MTPD>.
Reserved: 8 bits Reserved: 8 bits
These bits are reserved. They MUST be set to zero by senders These bits are reserved. They MUST be set to zero by senders
ignored by receivers (See [RFC6709] section 4.2). ignored by receivers (See [RFC6709] section 4.2).
block length: 16 bits block length: 16 bits
The constant 11, in accordance with the definition of this field The constant 6, in accordance with the definition of this field in
in Section 3 of RFC 3611. The block MUST be discarded if the Section 3 of RFC 3611. The block MUST be discarded if the block
block length is set to a different value. length is set to a different value.
SSRC of source: 32 bits SSRC of source: 32 bits
As defined in Section 4.1 of RFC 3611. As defined in Section 4.1 of RFC 3611.
begin_seq: 16 bits begin_seq: 16 bits
As defined in Section 4.1 of RFC 3611. As defined in Section 4.1 of RFC 3611.
end_seq: 16 bits end_seq: 16 bits
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MAY be used without prior signaling (See section 5 of RFC3611). MAY be used without prior signaling (See section 5 of RFC3611).
4.1. SDP rtcp-xr-attrib Attribute Extension 4.1. SDP rtcp-xr-attrib Attribute Extension
This session augments the SDP attribute "rtcp-xr" defined in Section This session augments the SDP attribute "rtcp-xr" defined in Section
5.1 of RFC 3611 by providing an additional value of "xr-format" to 5.1 of RFC 3611 by providing an additional value of "xr-format" to
signal the use of the report block defined in this document. signal the use of the report block defined in this document.
xr-format =/ xr-tpd-block xr-format =/ xr-tpd-block
xr-tpdd-block = "ts-psi-decodability" xr-tpd-block = "ts-psi-decodability"
4.2. Offer/Answer Usage 4.2. Offer/Answer Usage
When SDP is used in offer-answer context, the SDP Offer/Answer usage When SDP is used in offer-answer context, the SDP Offer/Answer usage
defined in [RFC3611] for unilateral "rtcp-xr" attribute parameters defined in [RFC3611] for unilateral "rtcp-xr" attribute parameters
applies. For detailed usage of Offer/Answer for unilateral applies. For detailed usage of Offer/Answer for unilateral
parameter, refer to section 5.2 of [RFC3611]. parameter, refer to section 5.2 of [RFC3611].
5. IANA Considerations 5. IANA Considerations
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