Method for assessing the perceived quality of adaptive video streaming

A network analyzer device for assessing perceived quality of adaptive media streaming in a network, comprising:

• an interface device for coupling to a network;
• a media analyzing device for analyzing adaptive media content received from a network via the interface device configured to analyze one or more sets of packets contained in the received adaptive media content;
• a quality analyzer device having a processor configured to:
• receive, from the media analyzing device, an encoded stream of adaptive media content comprising audio signals and video signals;
• decode the received stream of adaptive media content and determine a number of quality change events in the received decoded stream for a predetermined period of time;
• determine a difference value between a highest quality level value detected in the decoded received stream for the predetermined period of time and a lowest quality level value detected in the decoded received stream for the predetermined period of time;
• and
• generate a first quality impact score value for the decoded received stream based on the determined number of quality change events and based on the determined quality level difference value, wherein the Quality Impact Score=a1*NumberofQualityChanges+a2*MaxQualityDifference+a3*NumberofQualityChanges*MaxQualityDifference, where NumberofQualityChanges represents a number of detected quality of change events, MaxQualityDifference represents the quality difference value and where a1, a2 and a3 are scoring factors.