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Abstract Today, the demand for and interest in virtual reality (VR) is increasing, since we can now easily experience VR in many applications. However, the computational ability of mobile VR is limited compared to that of tethered VR. Since VR represents a 360-degree area, providing high quality only for the area viewed by the user saves considerable bandwidth. Therefore, we propose a new tile-based streaming method that transforms 360-degree videos into mobile VR using high efficiency video coding (HEVC) and the scalability extension of HEVC (SHVC). While the SHVC base layer (BL) represents the entire picture, the enhancement layer (EL) can transmit only the desired tiles by applying the proposed method. By transmitting the BL and EL using region of interest (ROI) tiles, the proposed method helps reduce not only the computational complexity on the decoder side but also the network bandwidth. [ABSTRACT FROM AUTHOR]

Error concealment (EC) is essential for a video transmission system over the error prone networks. However, it is very difficult to find the best EC method among many EC methods without the original pictures. This is the limitation of the EC method that only works at a video decoder side. Thus, this paper proposes a new method that signals best EC mode(s) which is calculated and determined at an encoder side to a decoder. When the experiments were conducted, gains in video quality vary from 0.2 to 2.5 dB in PSNR. [ABSTRACT FROM AUTHOR]

The quality of video streaming in 38 GHz millimetre‐wave heterogeneous main‐cell and small‐cell networks in terms of signal‐to‐interference‐noise ratio is analysed. According to numerical simulation results, the impacts of interference from small‐cells on the quality of video streaming in main‐cells are numerically measured and analysed. [ABSTRACT FROM AUTHOR]

The MPEG immersive video (MIV) has been designed to remove the redundancies of multi‐view videos and merge the residuals into two textures and two geometry videos; therefore, four bitstreams and video decoders are required to provide six degrees of freedom (6DoF) in virtual reality (VR) in MIV. This letter proposes a sub‐bitstream packing method and realisation in tiled streaming for MIV to provide a single bitstream for legacy systems that have a single decoder without an increase in the server‐side storage. The proposed method divided the input videos into tiles in the compressed‐domain to accomplish two goals: (i) generate a merged bitstream using the existing four bitstreams for legacy systems and (ii) improve the quality of an immersive video by disabling the deblocking filter. For a player with one or few numbers of decoders, the extracted tile sub‐streams were merged by the proposed four specific mixed‐quality tiling and packing methods using a motion‐constrained tile set (MCTS), while complying with the high‐efficiency video coding (HEVC) standard. Experimental results demonstrated that the proposed sub‐stream packing method required a single decoder and exhibited 17.40% decoding time and 0.81% bjontegaard‐delta rate (BD‐rate) savings on Y‐PSNR saving compared to the non‐tiled streaming method. [ABSTRACT FROM AUTHOR]

This paper describes the design and implementation of a multimedia home gateway for threescreen television (3STV) service. The proposed in-home wireless network uses scalable video coding (SVC) and unequal error protection with Raptor forward error correction (FEC) for maximizing the quality of experience (QoE) over the variable-bandwidth, error-prone wireless network. The gateway incorporates (a) dynamic SVC layerswitching, which enables the server to perform selecting appropriate layers from SVC bitstreams, (b) adaptive Raptor FEC, which controls the overhead of Raptor FEC according to packet loss rate (PLR), (c) an efficient combination of (a) and (b), and (d) slice group-based selective streaming in the overall gateway architecture. The paper explains the home gateway architecture as well as experiments for performance evaluation as compared to that of traditional SVC streaming. In the experiments conducted, gains in video quality vary from 2 to 5dB in peak signal-to-noise ratio (PSNR), with corresponding subjective improvements. Overall reductions of bit rate at the input to the home gateway vary from 28% to 36%1. [ABSTRACT FROM AUTHOR]

Biological regulatory pathways provide important information for target gene cancer therapy. Frequently, estimating the gene networks of two distinct patient groups is a worthwhile investigation. This paper proposes an approach, called jDAG, to the estimation of directed joint networks. It can identify common directed edges with joint data sets and distinct edges. In a simulation study, we show that the proposed jDAG outperforms existing methods although it does require longer computational times. We also present and discuss the example study of a breast cancer data set with ER + and ER-. [ABSTRACT FROM AUTHOR]

This paper presents two methodologies for delivering multimedia content to visually impaired people with the use of a haptic device and braille display. Based on our previous research, the research using Kinect v2 and haptic device with 2D+ (RGB frame with depth) data has the limitations of slower operational speed while reconstructing object details. Thus, this study focuses on the development of 2D multiarray braille display using an electronic book translator application because of its accuracy and high speed. This approach provides mobility and uses 2D multiarray braille display to represent media content contour more efficiently. In conclusion, this study achieves the representation of considerably massive text content compared to previous 1D braille displays. Besides, it also represents illustrations and figures to braille displays through quantization and binarization. [ABSTRACT FROM AUTHOR]

360-degree video streaming for high-quality virtual reality (VR) is challenging for current wireless systems because of the huge bandwidth it requires. However, millimeter wave (mmWave) communications in the 60 GHz band has gained considerable interest from the industry and academia because it promises gigabit wireless connectivity in the huge unlicensed bandwidth (i.e., up to 7 GHz). This massive unlicensed bandwidth offers great potential for addressing the demand for 360-degree video streaming. This paper investigates the problem of 360-degree video streaming for mobile VR using the SHVC, the scalable of High-Efficiency Video Coding (HEVC) standard and PC offloading over 60 GHz networks. We present a conceptual architecture based on advanced tiled-SHVC and mmWave communications. This architecture comprises two main parts. (1) Tile-based SHVC for 360-degree video streaming and optimizing parallel decoding. (2) Personal Computer (PC) offloading mechanism for transmitting uncompressed video (viewport only). The experimental results show that our tiled extractor method reduces the bandwidth required for 360-degree video streaming by more than 47% and the tile partitioning mechanism was improved by up to 25% in terms of the decoding time. The PC offloading mechanism was also successful in offloading 360-degree decoded (or viewport only) video to mobile devices using mmWave communication and the proposed transmission schemes. [ABSTRACT FROM AUTHOR]