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Data transmission through the internet is popular in contemporary world. What is of utmost importance is secrecy as well as data privacy in the communication channels of the internet. Steganography consists of by far the best techniques for data hiding and ensuring secrecy. This paper focuses on audio steganography, where a message audio file is embedded within another cover audio file.
Internet video coding (IVC) is an exploration within MPEG to develop a video compression technology that is expected of royalty-free and targeted to the compression performance comparable to MPEG-4 AVC/H.264 Constrained Baseline Profile (CBP). IVC codec has been steadily enhanced since 2011, so it is valuable to report comparison results in the progress. In this paper, we evaluate the codec performance...
A lightweight tele-immersive (TI) video chat system named CuteChat has been developed recently to provide a radically new video chat experience by merging each participant in the same shared space, allowing them to interact more naturally in an integrated manner. This paper presents an insight of the coding component in the system. Specifically, we present an efficient standard-compliant method to...
Teleoperations is an important field in robotics. From surgical robots to space robots, it has found applications in different areas. This paper discusses the development of master side user interface and video encoder for video compression and transmission. It is a single robot, single user but multiple collaborator system. The master interface is developed using Adobe Flash and is cross operating...
Multiple Descriptions (MDs) source coding is a method to overcome unexpected information loss in a diversity system such as the internet, or a wireless network. In case that the information can suffer loss and still be intelligible, like audio or video, MD is a way to take full advantage of the diversity in the system and provide graceful degradation. Standards-compliant MD coding targeting widely...
Video transmission over Internet is often afflicted by various packet losses. The packet-lever forward error correction (FEC) is often used for error recovery in order to enhance the end-to-end video quality. However, the quality metrics used in traditional FEC scheme designing such as peak signal-to-noise ratio (PSNR) have been founded not correlate well with human perceptual quality and usually...
High definition video over IP based networks (IPTV) has become a mainstay in today's consumer environment. In most applications, encoders conforming to the H.264/AVC standard are used. But even within one standard, often a wide range of coding tools are available that can deliver a vastly different visual quality. Therefore we evaluate in this contribution different coding technologies, using different...
In live video communication, the quality of the video that is encoded on a mobile device is more often than not constrained by the available computational resources. We address this problem by allowing the encoder to “outsource” the encoding complexity to the decoder through the use of feedback, under a sum-rate constraint comprising the weighted sum of the forward and feedback rates. Analysis of...
This paper presents a novel mechanism for scheduling packet transmissions of real-time video conferencing over the public Internet. By scheduling transmissions of video packets at different priorities in the presence of packet losses and delays, we aim to deliver videos with perceptually pleasing and consistent quality at receivers. Fundamental to this new mechanism is a realization of uneven packet...
With the rapid development of video streaming era, multipath video streaming comes as a promising solution. However, dividing the video into different sub-streams is still considered as an important challenge for researchers. In this paper, we propose an approach for generating multiple complementary descriptions of the video flow, then to couple these descriptions with the path diversity provided...
Today, there's a growing trends to broadcast and stream multimedia files over the internet due to low cost of transmission. Protocols divide transmitted data to packets but problem was, with the limited bandwidth, which leads to the delay of the received image. We propose a framework for data transmission that overcome the limited bandwidth problem. The major feature of the framework is decreasing...
Increasingly, we can obtain more than one compressed copy of the same video content with different levels of visual quality over the Internet. As the original source video is not always available, how to choose or derive a video of the best quality from these copies becomes a challenging and interesting problem. In this paper, we address this new research problem by blindly enhancing the quality of...
The quality layers concept is proposed and adopted in the JSVM in order to ensure an optimal adaptation in a rate-distortion sense. In this paper it is extended to multi-view case for scalable coding of multi-view videos (MVV). Rate-visual-distortion optimized rate allocation among the views is necessary for efficient transport of multi-view data over the Internet. This paper addresses a standard...
In this paper, we study multiple description (MD) coding and transport for real-time video using multiple asymmetric paths in a packetized network. In particular, we construct the motion- compensated (MC) MD codes using MC-FGS video coder, based on the statistical characteristics and the asymmetry of the multiple routing paths. The MCMDs are the optimally allocated to the multiple paths to minimize...
This work proposes a quality-oriented multimedia delivery framework that tackles the issue of optimizing video broadcasting and interactive video applications over packet networks with respect to both resource utilization and user perceived quality. Previous work showed that the quality of service requirements of multimedia applications can be optimally satisfied by pipeline forwarding of packets...
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