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The existing video coding standards such as H.264/AVC and High Efficiency Video Coding (HEVC) have been designed based on the statistical properties of Low Dynamic Range (LDR) videos and are not accustomed to the characteristics of High Dynamic Range (HDR) content. In this study, we investigate the performance of the latest LDR video compression standard, HEVC, as well as the recent widely commercially...
The genuine viewing quality of High Dynamic Range (HDR) data brought an evolution to content production and display manufacture markets. However, the efficiency of compression and transmission of HDR content still needs to be improved. In this paper we modify the H.264/AVC standard to better characterize HDR content. We propose a new Lagrangian multiplier that strikes a balance between the bit-rate...
The 3D extension of High Efficiency Video Coding (HEVC) standard (3D-HEVC) aims at improving coding efficiency by introducing new and unique approaches for utilizing correlations between the different views of a scene. Reported coding efficiency, however, comes at the expense of increased computational complexity. For real-time applications, reducing the computational complexity of 3D-HEVC is very...
Three-dimensional video has recently gained great popularity as it enhances the viewing experience. Streaming of 3D video over IP networks will soon become a common means of multimedia consumption, thanks to the recent standardization efforts such as MPEG-DASH and 3D-HEVC. To this end, rate adaptation techniques are required to overcome the unreliable nature of IP networks. In this paper, we propose...
In this paper, we propose an efficient human action recognition technique, which utilizes Depth and RGB information of the scene. Our proposed technique, first builds a pair of classifiers based on RGB and depth information to independently predict the actions within a scene. Then, the obtained results from these classifiers are combined to achieve high accuracies in human action recognition. Our...
In this paper, we study the effect of 3D videos with increased frame rates on the viewers' quality of experience. We performed a series of subjective tests to seek the subjects' preferences among videos of the same scene at four different frame rates: 24, 30, 48, and 60 frames per second (fps). Results revealed that subjects clearly prefer higher frame rates. In particular, Mean Opinion Score (MOS)...
Cloud based applications demand a higher level of security, privacy, and reliability toward a more cost effective solution. One of the challenges for the users of cloud-based services and applications is finding the most trusted provider for the minimum cost. The trusted providers from each customer can have different interpretation, or with different priority of the meaning. Furthermore, a tier-1...
The emergence of multiview displays has made the need for synthesizing virtual views more pronounced, since it is not practical to capture all of the possible views when filming multiview content. View synthesis is performed using the available views and depth maps. There is a correlation between the quality of the synthesized views and the quality of depth maps. In this paper we study the effect...
Non-intrusive activity monitoring of occupants in a home environment plays an important role in developing the next generation of smart environments and remote health monitoring systems. One important challenge in this research area is lack of a comprehensive dataset. In this paper, we introduce a new dataset related to a smart home environment, which can be used for human activity recognition. In...
3D-HEVC is aiming at utilizing the advanced tools present in HEVC to efficiently code multiview video content. The computational complexity of this codec is significantly increased and is a challenge for real-time applications. In our study, we propose an adaptive early-termination inter and intra prediction mode search that reduces the 3D-HEVC coding complexity by utilizing the correlations between...
As the evolution of multiview display technology is bringing glasses-free 3DTV closer to reality, MPEG and VCEG are preparing an extension to HEVC to encode multiview video content. View synthesis in the current version of the 3D video codec is performed using PSNR as a quality metric measure. In this paper, we propose a full-reference Human-Visual-System based 3D video quality metric to be used in...
Video sensor networks (VSN) offer an interesting platform for a distributed and flexible surveillance system. In such a system, video compression and wireless transmission are the major operations on each video node. For a battery-powered wireless video sensor, it is essential to maximize the power efficiency of these two operations. Currently, H.264/AVC is the most widely used ITU-T and ISO/IEC video...
In this paper, we propose a new full-reference quality metric for mobile 3D content. Our method is modeled around the Human Visual System, fusing the information of both left and right channels, considering color components, the cyclopean views of the two videos and disparity. Our method is assessing the quality of 3D videos displayed on a mobile 3DTV, taking into account the effect of resolution,...
There has been significant interest in developing a scalable version of the High Efficiency Video Coding (HEVC) standard. As expected, the HEVC scalable video version increases the complexity of the codec compared to the non-scalable counterpart. In this paper, we propose an adaptive early-termination interlayer motion prediction mode search that significantly reduces HEVC/SVC's coding complexity...
In bit-depth scalable video coding, the tone-mapping scheme used to convert high-bit-depth to eight-bit videos is an essential yet very often ignored component. In this paper, we demonstrate that an appropriate choice of a tone-mapping operator can improve the coding efficiency of bit-depth scalable encoders. We present a new tone-mapping scheme that delivers superior compression efficiency while...
This paper proposes a novel service-oriented mobile social networking platform called MS2A for disaster situations. MS2A consists of two layers: service layer and application layer. The service layer is implemented based on the service-oriented architecture (SOA) to ease application developments. By extending and composing the web services at this layer, application developers can efficiently and...
Although several 2D quality metrics have been proposed for images and videos, in the case of 3D efforts are only at the initial stages. In this paper, we propose a new full-reference quality metric for 3D content. Our method is modeled around the HVS, fusing the information of both left and right channels, considering color components, the cyclopean views of the two videos and disparity. Performance...
The high level of compression achieved by HEVC raises a question regarding its error-resilience performance extremely compressed data over an imperfect medium. In this paper, we study the behavior of this newly developed video coding standard over diverse networking scenarios. It is shown that HEVC is less error resilient compared to H.264/AVC, especially in the scenes with high amount of motion,...
The appearance of multiview display systems in the consumer market is not far from reality. With technical knowledge in this field constantly improving, production of multiview content is the only other key factor that will determine the successful adoption of this technology. Multiview content can be generated from two or three views and their associated depth maps. Estimating a high quality depth...
The need for synthesizing virtual views is more pronounced with the advent of multiview displays, as it is not practical to capture all of the possible views when filming multiview content for different multiview display technologies. Unfortunately, during the process of view synthesis, areas, which were occluded by foreground objects in the real views, become visible in the virtual view as holes...
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