@Article{Koumaras05,
  author =	"Harilaos Koumaras and Anastasios Kourtis and Drakoulis
		 Martakos",
  title =	"Evaluation of Video Quality Based on Objectively
		 Estimated Metric",
  journal =	"Journal Of Communication and Networks",
  volume =	"7",
  number =	"3",
  year = 	"2005",
  abstract =	"Multimedia applications and especially encoded video
		 services, are expected to play a major role in the 3rd
		 generation (3G) and beyond mobile communication
		 systems. Given that future service providers are
		 expected to provide video applications at various price
		 and quality levels, quick and economically affordable
		 methods for preparing/encoding the offering media at
		 various qualities are necessary to be developed. This
		 paper presents a method for objective evaluation of the
		 perceived quality of MPEG- 4 video content, based on a
		 quantification of subjective assessments. Showing that
		 subjectively derived perceived quality of service
		 (PQoS) vs. bit rate curves can be successfully
		 approximated by a group of exponential functions, the
		 proposed method exploits a simple objective metric,
		 which is obtained from the mean frame rate vs. bit rate
		 curves of an encoded clip. The validity of this metric
		 is assessed by comparing subjectively derived PQoS
		 results to the corresponding ones, which come from the
		 proposed objective method, showing that the proposed
		 technique provides satisfactory PQoS estimation.",
}