In RFC 3611, MOS-LQ is a listening-quality estimate that excludes delay effects, while MOS-CQ is a conversational-quality estimate that includes them.

Checked 2026-09-24

Vendor
IETF
Product
RTCP XR
Subsystem
VoIP Metrics block
Deployment
any
Region
not restricted
Release range
current as of 2026-09-24
Checked
2026-09-24

Sources

Cite this note

APA

WarmTransfer. (2026, September 24). RTP and RTCP quality metrics: source note rtp-rtcp-quality-xr-mos-lq-vs-cq. WarmTransfer. https://warmtransfer.net/knowledge/claims/rtp-rtcp-quality-xr-mos-lq-vs-cq

BibTeX

@misc{warmtransfer-claim-rtp-rtcp-quality-xr-mos-lq-vs-cq,
  title  = {RTP and RTCP quality metrics: source note rtp-rtcp-quality-xr-mos-lq-vs-cq},
  author = {{WarmTransfer}},
  year   = {2026},
  url    = {https://warmtransfer.net/knowledge/claims/rtp-rtcp-quality-xr-mos-lq-vs-cq},
  note   = {Source note rtp-rtcp-quality-xr-mos-lq-vs-cq, checked 2026-09-24}
}

Read in context