One of the most potentially disruptive developments in streaming and broadcast space is the CMSD (Common Media Server Data) specification, which combined with MQA (Media Quality Analysis) enables smarter quality monitoring for live streaming. This standard addresses a fundamental inefficiency in how the industry monitors streaming quality today.
The Problem with Traditional Monitoring
Large-scale live operations typically deploy numerous probes throughout their infrastructure to monitor stream quality in real-time. These probes are expensive, and for high-value content, they require DRM keys—creating significant security and management challenges. One frustration is that they are typically recreating information that has already been calculated numerous times in the upstream workflow.
The CMSD Solution
CMSD-MQA allows quality metadata to be inserted at the encoding stage and flow through the entire delivery chain — from the encoder through the packager to the CDN to client devices. This means encoders can calculate VMAF scores, check audio quality, and generate comprehensive statistics once, embedding this data directly into the stream. Then everything downstream can track and decision on that information.
The practical benefits are substantial. A packager receiving feeds from multiple encoding centers can automatically switch to the highest-quality source if one experiences rain fade or other issues. CDNs can make smarter routing decisions based on actual quality metrics. Even end-user players can optimize their experience using this embedded quality data.
Combined with emerging technologies like Media over QUIC, these innovations represent a fundamental shift toward more intelligent, efficient live streaming infrastructure that delivers better experiences with lower operational overhead. Here’s Norsk CEO and co-founder Adrian Roe talking about CMSD at IBC2025. Get in touch or set up a demo if you want to learn more, and watch soon for a webinar on CMSD with Norsk, G&L, Touchstream, and Akamai, who are all working together to bring CMSD to market.
