An Engagement Model Based on User Interest and QoS in Video Streaming Systems

Table 4

Performance of the engagement predictive models.

(a) Models BS-1 using each single QoS metric as input feature

Input Feature	Buffer ratio	Average buffer length	Buffer frequency
RMSE	3.1727	3.1871	3.1553

(b) Models using quality factors and human factors

Model	Input Feature	RMSE	Improvement
BS-2	All the QoS metrics	3.0926	- -
BS-3	QoS, interest	2.9846	3.5%
QI-E	QoS, interest (multiplicative item)	2.8588	7.6%