Image and Video Quality Assessment

Today, the technology for video streaming over the Internet is converging towards a paradigm named HTTP-based adaptive streaming (HAS), which brings two new features. First, by using HTTP/TCP, it leverages network-friendly TCP to achieve both firewall/NAT traversal and bandwidth sharing. Second, by pre-encoding and st…

• ALİ CENGİZ BEĞEN

Adaptive (video) streaming over HTTP is gradually being adopted, as it offers significant advantages in terms of both user-perceived quality and resource utilization for content and network service providers. In this paper, we focus on the rate-adaptation mechanisms of adaptive streaming and experimentally evaluate tw…

In this survey, we present state-of-the-art bitrate adaptation algorithms for HTTP adaptive streaming (HAS). As a key distinction from other streaming approaches, the bitrate adaptation algorithms in HAS are chiefly executed at each client, i.e., in a distributed manner. The objective of these algorithms is to ensure…

• ALİ CENGİZ BEĞEN

With an increasing demand for high-quality video content over the Internet, it is becoming more likely that two or more adaptive streaming players share the same network bottleneck and compete for available bandwidth. This competition can lead to three performance problems: player instability, unfairness between playe…

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• İDRİS GÖKSU

No abstract yet.

• MURAT ÇOBAN

The average US consumer watches TV for almost five hours a day. While the majority of viewed content is still broadcast TV programming, the share of the time-shifted content is on the rise. One-third of US viewers currently use a digital video recorder like device, but trends indicate that more consumers are migrating…

• TANKUT AKGÜL

The average US consumer watches TV for almost five hours a day. While the majority of viewed content is still broadcast TV programming, the share of the time-shifted content is on the rise. One-third of US viewers currently use a digital video recorder like device, but trends indicate that more consumers are migrating…

• ALİ CENGİZ BEĞEN

Computational saliency models for still images have gained significant popularity in recent years. Saliency prediction from videos, on the other hand, has received relatively little interest from the community. Motivated by this, in this paper, we study the use of deep learning for dynamic saliency prediction and prop…

• İBRAHİM AYKUT ERDEM
• MEHMET ERKUT ERDEM

Prior work has shown that two or more adaptive streaming players can be unstable when they compete for bandwidth. The root cause of the instability problem is that, in Steady-State, a player goes through an ON-OFF activity pattern in which it overestimates the available bandwidth. We propose a server-based traffic sha…

We propose an Iterative Mean Filter (IMF) to eliminate the salt-and-pepper noise. IMF uses the mean of gray values of noise-free pixels in a fixed-size window. Unlike other nonlinear filters, IMF does not enlarge the window size. A large size reduces the accuracy of noise removal. Therefore, IMF only uses a window wit…

• SERDAR ENGİNOĞLU
• UĞUR ERKAN

HTTP adaptive streaming (HAS) is being adopted with increasing frequency and becoming the de-facto standard for video streaming. However, the client-driven, on-off adaptation behavior of HAS results in uneven bandwidth competition and this is exacerbated when a large number of clients share the same bottleneck network…