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This paper proposes a real-time Audio and Video Artifacts Detection Tool (AVADT), solution that wraps implemented artifacts detection methods for most important and common audio and video artifacts. It can also be used for evaluation of different modules and functions of device under testing (e.g. encoder, decoder). AVADT can operate in two modes: offline mode for evaluation of existing, locally stored...
Measuring perceived quality of audio-visual signals at the end-user has become an important parameter in many multimedia networks and applications. It plays a crucial role in shaping audio-visual processing, compression, transmission and systems, along with their implementation, optimization, and testing. Service providers are enacting different quality of service (QoS) solutions to issue the best...
Currently, dynamic adaptive streaming over HTTP (DASH) standard is used to change the video resolution according to the network capacity of the end user’s. However, if the video resolution changes frequently, the attention of the users can be affected decreasing their quality-of-experience (QoE). In this context, this paper proposes a no-reference video quality metric that takes three impairment factors...
The scientific researches performed in the past decade clearly highlighted that Quality of Experience (QoE) has become the ultimate measure of service value in this rapidly developing era of technology. Its continuous monitoring is now simply essential and is the key to service success. Subjectively measured QoE is considered to be somewhat unerring, however, several human factors may introduce distortions...
The goal of this paper is to assess whether existing solutions to expand low dynamic range (LDR) still images to high dynamic range (HDR) displays can apply to moving pictures. To this end, we conduct a subjective quality assessment test on four state-of-the-art expansion operators, using high-quality input LDR content. Our results show that, perhaps surprisingly, no temporal artifacts, such as flickering...
In multimodal presentations the perceived audiovisual quality assessment is significantly influenced by the content of both the audio and visual tracks. Based on our earlier subjective quality test for finding the optimal trade-off between audio and video quality, this paper proposes a novel method for relative multimodal complexity analysis to derive the fusion parameter in objective audiovisual...
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