draft-ietf-xrblock-rtcp-xr-video-lc-05.txt   draft-ietf-xrblock-rtcp-xr-video-lc-06.txt 
XRBLOCK R. Huang XRBLOCK R. Huang
INTERNET-DRAFT Huawei INTERNET-DRAFT Huawei
Intended Status: Standards Track A. Clark Intended Status: Standards Track March 30, 2016
Expires: May 9, 2016 Telchemy Expires: September 30, 2016
November 6, 2015
RTCP XR Report Block for Loss Concealment Metrics Reporting on RTCP XR Report Block for Loss Concealment Metrics Reporting on
Video Applications Video Applications
draft-ietf-xrblock-rtcp-xr-video-lc-05 draft-ietf-xrblock-rtcp-xr-video-lc-06
Abstract Abstract
This document defines a new RTCP XR Report Block that allows the This document defines a new RTCP XR Report Block that allows the
reporting of loss concealment metrics for video applications of RTP. reporting of loss concealment metrics for video applications of RTP.
Status of this Memo Status of this Memo
This Internet-Draft is submitted to IETF in full conformance with the This Internet-Draft is submitted to IETF in full conformance with the
provisions of BCP 78 and BCP 79. provisions of BCP 78 and BCP 79.
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material or to cite them other than as "work in progress." material or to cite them other than as "work in progress."
The list of current Internet-Drafts can be accessed at The list of current Internet-Drafts can be accessed at
http://www.ietf.org/1id-abstracts.html http://www.ietf.org/1id-abstracts.html
The list of Internet-Draft Shadow Directories can be accessed at The list of Internet-Draft Shadow Directories can be accessed at
http://www.ietf.org/shadow.html http://www.ietf.org/shadow.html
Copyright and License Notice Copyright and License Notice
Copyright (c) 2015 IETF Trust and the persons identified as the Copyright (c) 2016 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
carefully, as they describe your rights and restrictions with respect carefully, as they describe your rights and restrictions with respect
to this document. Code Components extracted from this document must to this document. Code Components extracted from this document must
include Simplified BSD License text as described in Section 4.e of include Simplified BSD License text as described in Section 4.e of
the Trust Legal Provisions and are provided without warranty as the Trust Legal Provisions and are provided without warranty as
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obtain a quite satisfactory result. obtain a quite satisfactory result.
c) Interpolation c) Interpolation
A decoder uses the undamaged pixels in the video frame to estimate A decoder uses the undamaged pixels in the video frame to estimate
what the missing block of pixels should have. what the missing block of pixels should have.
d) Error Resilient Encoding d) Error Resilient Encoding
The sender encodes the message in a redundant way so that receiver The sender encodes the message in a redundant way so that receiver
can correct errors using the redundant information.There are usually can correct errors using the redundant information. There are usually
two kinds of Error Resilient Encoding: One is that the redundant data two kinds of Error Resilient Encoding: One is that the redundant data
useful for error resiliency performed at the decoder can be embedded useful for error resiliency performed at the decoder can be embedded
into the compressed image/video bitstream. For example, the encoder into the compressed image/video bitstream. The other is bit-block
can select a crucial area of an original video frame, extract some
important characteristics of this area as the redundant information,
e.g., redundant motion vector of the first macroblock in a slice of
this area and redundant motion vector difference of other macroblocks
in this slice of this area, and imperceptibly embed them into other
parts of the video frame sent in a different RTP packet or in the
next frame, e.g., other slices of this area. The other is bit-block
level encoding, e.g., FEC. level encoding, e.g., FEC.
Usually, methods b,c,d are deployed together to provide a Usually, methods b,c,d are deployed together to provide a
comprehensive loss concealment in some complex decoders, while method comprehensive loss concealment in some complex decoders, while method
a is relatively independent and may be only applied in some simple a is relatively independent and may be only applied in some simple
decoders. Moreover, frame freeze method repairs video based on frames decoders. Moreover, frame freeze method repairs video based on frames
while the other methods repair video based on fine-grained elements, while the other methods repair video based on fine-grained elements,
such as macroblock or bit-block, which will cause the measurement such as macroblock or bit-block, which will cause the measurement
metrics of frame freeze and the other methods slightly different. metrics of frame freeze and the other methods slightly different.
Thus, In this document, we differentiate between frame freeze and the Thus, In this document, we differentiate between frame freeze and the
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Authors' Addresses Authors' Addresses
Rachel Huang Rachel Huang
Huawei Huawei
101 Software Avenue, Yuhua District 101 Software Avenue, Yuhua District
Nanjing 210012 Nanjing 210012
China China
EMail: rachel.huang@huawei.com EMail: rachel.huang@huawei.com
Alan Clark
Telchemy Incorporated
2905 Premiere Parkway, Suite 280
Duluth, GA 30097
USA
Email: alan.d.clark@telchemy.com
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