[codec] #27: Testing Impact on IP on Codec Performance
"codec issue tracker" <trac@tools.ietf.org> Sun, 02 May 2010 12:45 UTC
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Subject: [codec] #27: Testing Impact on IP on Codec Performance
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#27: Testing Impact on IP on Codec Performance ------------------------------------+--------------------------------------- Reporter: hoene@… | Owner: Type: defect | Status: new Priority: major | Milestone: Component: requirements | Version: Severity: Active WG Document | Keywords: ------------------------------------+--------------------------------------- The CODEC shall be tested against realistic traces of IP packets. The draft writes "The actual packet loss "patterns" to be used in testing must be obtained from real packet loss traces collected on the Internet, rather than from loss models. These traces should be representative of the typical environments in which the applications of Section 2 operate. For example, traces related to VoIP calls should consider the loss patterns observed for typical home broadband and corporate connections." Hoene wrote " The testing of ACS and the quality characterization shall be performed with real network profiles such as with [TIA-921] or those given in the appendix [TS.26114-830], not with fixed set of "average distributed errors and losses". Later do not clearly reflect the Internet nature." The ITU-T has standardized G.1050 (aka TIA-921) and Telchemy is providing an open source implementation: http://www.ietf.org/mail-archive/web/avt/current/msg06710.html http://www.itu.int/rec/T-REC-G.1050-200711-I/en But then again, which glue (rate control, dejitter buffer) shall be used between IP and codec? -- Ticket URL: <http://trac.tools.ietf.org/wg/codec/trac/ticket/27> codec <http://tools.ietf.org/codec/>
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