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The High Efficiency Video Coding (HEVC) standard enables meeting new video quality demands such as Ultra High Definition (UHD). Its scalable extension (SHVC) allows encoding simultaneously different representations of a video, organised in layers. Thanks to inter-layer predictions, SHVC provides bit-rate savings compared to the equivalent HEVC simulcast encoding. Therefore, SHVC seems a promising...
In this paper we present a real-time streaming demonstration with a multi-layer architecture of a pipelined software High Efficiency Video Coding (HEVC) encoders with inter-layer prediction enabling Scalable HEVC (SHVC) encodings. This SHVC encoder is implemented on an innovative platform performing real-time encodings that already demonstrated promising performance with HDR, HFR and SHVC implementation...
We present a simple yet effective framework – Transmitting What Matters (TWM) – to generate compressed videos containing only relevant objects targeted to specific computer vision tasks, such as faces for the task of face expression recognition, license plates for the task of optical character recognition, among others. TWM takes advantage of the final desired computer vision task to compose video...
Problem of providing information security of video information resource in aerial surveillance systems and video conferencing is considered. Procedure for creating code by using the structural coding technology is represented. The dependence of the distribution error on column component values from its position in the code during restoration of transform is shown. The method for encoding technology...
In this article deals with estimating and analysis capacity of the closed video channel in the case of applying the method for processing video data based on standardized MPEG technology, the method for closing the video based on the series circuit (compression followed by encryption), the method to hide all the video after the DCT blocks of the base of the video frame, the method based on the selection...
We propose an end-to-end approach to describe the energy usage of video delivery within a content delivery framework, and use this to investigate the energy usage behavior of two popular coding schemes, namely, H.264/AVC and H.265/HEVC. Our study based on the proposed model is backed up by measurements of encoding and decoding energy usage of a sample video and shows that, from an end-to-end perspective,...
Efficient Multimedia Broadcast and Multicast Services (MBMS) to heterogeneous users in cellular networks imply adaptive video encoding, layered multimedia transmission, optimized transmission parameters, and dynamic broadcast area definition. This paper deals with MBMS by proposing a multi-dimensional approach for broadcast area definition, which provides an effective solution to all of the above...
This electronic document is a “live” template and already defines the components of your paper [title, text, heads, etc.] in its style sheet. Video streaming is a technique for distributing media content, in which it is not necessary for the streams of the requested file to arrive in full in order to begin playing the video. Traditionally, streaming has been supported by RTP and RTSP protocols, requiring...
The design of information pushing system based on visible light communication (VLC) and its optical channel performance testing were presented. The system was designed to meet requirements of some intensive conferences or special security area. The results showed that the transmission bandwidth of video signal was 500Kbps. Besides, data transmission rate of 4Mbit/s at the distance of 2.5m was achieved...
Low-bitrate video compression is a challenging task, particularly with the increasing complexity of video sequences. Re-shaping video data before its compression with modern hybrid encoders has provided interesting results in the low and ultra-low bit rate domains. In this work, we propose a novel saliency guided preprocessing approach, which combines adaptive re-sampling and background texture removal,...
Live video streaming from mobile devices is quickly becoming popular through services such as Periscope, Meerkat, and Facebook Live. Little is known, however, about how such services tackle the challenges of the live mobile streaming scenario. This work addresses such gap by investigating in details the characteristics of the Periscope service. A large number of publicly available streams have been...
In this paper we propose a new quality metric to estimate the impact of packet loss on the perceptual quality of encoded video sequences transmitted over error-prone networks. The proposed metric, henceforth referred to as Cumulative Distortion using Structural Similarity (CDSSIM), quantifies the overall structural distortion resulting from bidirectional error propagation in predictively coded, motion...
A cloud-based encoding pipeline which generates streams for video-on-demand distribution typically processes a wide diversity of content that exhibit varying signal characteristics. To produce the best quality video streams, the system needs to adapt the encoding to each piece of content, in an automated and scalable way. In this paper, we describe two algorithm optimizations for a distributed cloud-based...
Real-time video applications, such as multi party video conferencing, involve the simultaneous transport of multiple and potentially multi-layered video sources to participating or interested parties. It is desirable to mix these multiple source videos into a single video stream at intermediary nodes in the network, e.g. at Multipoint Control Units (MCU). This has the advantage of reduced application...
Mobile display has been considered as the major contributor to the energy consumption of the ever-increasing mobile video services. Current practices in display energy reduction (DER) utilize local computing resources to analyze the video content before DER strategies can be applied in a per-device fashion. For a given video, same analytical computations are repeated in millions of individual devices...
While a number of existing high-bit depth video compression methods can potentially encode high dynamic range (HDR) video, few of them provide this capability. In this paper, we investigate techniques for adapting HDR video for this purpose. In a large-scale test on 33 HDR video sequences, we compare 2 video codecs, 4 luminance encoding techniques (transfer functions) and 3 color encoding methods,...
A light field (LF) is a 2D array of closely spaced viewpoint images of a static 3D scene. In an interactive LF streaming (ILFS) scenario, a user successively requests desired neighboring viewpoints for observation, and in response the server must transmit pre-encoded data for correct decoding of the requested viewpoint images. Designing frame structures for ILFS is challenging, since at encoding time...
Multiple description coding has been shown to provide flexible and distortion-rate optimal video streaming transmission over lossy links. In this paper, we provide an adaptive MD-FEC algorithm for point-to-multipoint video streaming that approximately minimizes the average distortion of the multicast video. Our new algorithm accomplishes this by adapting both the packet lengths and their number to...
To enable robust multiview video streaming over current wireless broadcast infrastructures, this paper proposes a joint source and channel coding optimization framework for video streaming based upon multiview video coding technique. It utilizes random linear coding (RLC) with ladder-shaped global coding coefficient matrix (GCM) for unequal erasure protection. An accurate expression of the decoding...
Complex software appliances can be deployed on hardware with limited available computational resources. This computational boundary puts an additional constraint on software applications. This can be an issue for real-time applications with a fixed time constraint such as low delay video encoding. In the context of High Efficiency Video Coding (HEVC), a limited number of publications have focused...
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