Re: [xrblock] I-D Action: draft-ietf-xrblock-rtcp-xr-psi-decodability-00.txt
"Huangyihong (Rachel)" <rachel.huang@huawei.com> Tue, 11 February 2014 12:10 UTC
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From: "Huangyihong (Rachel)" <rachel.huang@huawei.com>
To: Colin Perkins <csp@csperkins.org>, xrblock mailing list <xrblock@ietf.org>
Thread-Topic: [xrblock] I-D Action: draft-ietf-xrblock-rtcp-xr-psi-decodability-00.txt
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Date: Tue, 11 Feb 2014 12:09:45 +0000
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Subject: Re: [xrblock] I-D Action: draft-ietf-xrblock-rtcp-xr-psi-decodability-00.txt
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Hi Colin, Please see inline. Best regards, Rachel > -----Original Message----- > From: xrblock [mailto:xrblock-bounces@ietf.org] On Behalf Of Colin > Perkins > Sent: Tuesday, February 11, 2014 7:49 AM > To: xrblock mailing list > Subject: Re: [xrblock] I-D Action: draft-ietf-xrblock-rtcp-xr-psi- > decodability-00.txt > > On 16 Dec 2013, at 18:10, Internet-Drafts@ietf.org wrote: > > A New Internet-Draft is available from the on-line Internet-Drafts > directories. > > This draft is a work item of the Metric Blocks for use with RTCP's > Extended Report Framework Working Group of the IETF. > > > > Title : RTP Control Protocol (RTCP) Extended Report (XR) > Block for MPEG2 Transport Stream (TS) Program Specific Information (PSI) > Decodability Statistics Metrics reporting > > Author(s) : Jiangang Tong > > Claire Bi > > Roni Even > > Qin Wu > > Rachel Huang > > Filename : draft-ietf-xrblock-rtcp-xr-psi-decodability- > 00.txt > > Pages : 10 > > Date : 2013-12-05 > > > > Abstract: > > An MPEG2 Transport Stream (TS) is a standard container format used > in > > the transmission and storage of multimedia data. Unicast/Multicast > > MPEG2 TS over RTP is widely deployed in IPTV systems. This > document > > defines an RTP Control Protocol (RTCP) Extended Report (XR) Block > > that allows the reporting of MPEG2 TS decodability statistics > metrics > > related to transmissions of MPEG2 TS over RTP. The metrics > specified > > in the RTCP XR Block are related to Program specific information > > carried in MPEG TS. > > > > > > The IETF datatracker status page for this draft is: > > https://datatracker.ietf.org/doc/draft-ietf-xrblock-rtcp-xr-psi- > decodability > > It occurs to me that the issue with begin_seq and end_seq having to be > within the same RTP sequence number cycle to be unambiguous is present > in this draft, as well as the post-repair-loss-count draft (also in RFC > 6990 and maybe other places). The various *_count field here can > probably all be shortened to 16 bits without changing the utility of > the report block (several use 0xFFFF as an over-range value, so this > seems to be implied anyway). > > The metrics in this draft count the errors of TS packets which is encapsulated in RTP packets. One RTP packets may contain 8 TS packets at most. Though it seldom happens, it is still possible that the value of the metrics over 16-bit. Right? > -- > Colin Perkins > http://csperkins.org/ > > > > _______________________________________________ > xrblock mailing list > xrblock@ietf.org > https://www.ietf.org/mailman/listinfo/xrblock
- [xrblock] I-D Action: draft-ietf-xrblock-rtcp-xr-… internet-drafts
- Re: [xrblock] I-D Action: draft-ietf-xrblock-rtcp… Colin Perkins
- Re: [xrblock] I-D Action: draft-ietf-xrblock-rtcp… Huangyihong (Rachel)
- Re: [xrblock] I-D Action: draft-ietf-xrblock-rtcp… Colin Perkins
- Re: [xrblock] I-D Action: draft-ietf-xrblock-rtcp… Huangyihong (Rachel)