H. Koumaras

Publications37
h-index11
Citations361
Highly Influential Citations14
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A framework for end-to-end video quality prediction of MPEG video
Survey of cross-layer proposals for video streaming over Mobile Ad hoc Networks (MANETs)
TLDR
A survey of 44 studied papers on cross-layer mechanisms in MANETs, comparing tools, parameters and metrics used for their evaluation and indicatively describes in more detail some of these proposals.
Analysis of H . 264 video encoded traffic
TLDR
Analysis of the data suggests that the video traffic can be considered as a stationary stochastic process with an autocorrelation function of exponentially fast decay and a marginal frame size distribution of approximately Gamma form.
NFV applicability and use cases in satellite networks
TLDR
It is concluded that NFV adoption seems quite beneficial for the satcom sector in order to maintain its competitiveness, promote its inherent benefits and also to achieve the smooth integration of the satellite components and their indispensable satellite-specific capabilities into the future federated heterogeneous networks, within the 5G context.
Quantified PQoS assessment based on fast estimation of the spatial and temporal activity level
TLDR
The Mean PQoS (MPQoS) is introduced as a function of the video encoding rate and the picture resolution, and exploits it as a metric for objective video quality assessment.
Pre-Encoding PQoS Assessment Method for Optimized Resource Utilization
This paper presents an assessment method for fast and quantified estimation of the Perceived Quality of Service (PQoS) for homogeneous MPEG-4 video content, enabling optimized utilization of the…
Video Quality Prediction based on the Spatial and Temporal Classification of the Uncompressed Content
TLDR
It is shown how the perceived quality of service (PQoS) is introduced and exploited for quantifying purposes and how it can be further exploited towards proposing a technique for video quality prediction at a pre-encoding state.
Shot boundary detection without threshold parameters
TLDR
A novel method for shot boundary detection of discrete cosine transform (DCT)-based and low-bit-rate encoded clips is introduced, which exploits the perceptual blockiness effect detection on each frame without using any threshold parameter, therefore mini- mizing the processing demands required for algorithm.
A Theoretical Framework for End-to-End Video Quality Prediction of MPEG-based Sequences
TLDR
A novel theoretical framework for end-to-end video quality prediction of MPEG-based video sequences is presented and the efficiency of both the discrete models is experimentally validated, proving the accuracy of the proposed framework.
Evaluation of video quality based on objectively estimated metric
TLDR
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 the proposed technique provides satisfactory PQoS estimation.
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