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Image resolution in modern video processing and display systems are rocketing up in recent years. With the main stream video quality evolving from standard definition to high-definition, and further towards the emerging super high-definition, the bandwidth and power consumption of external memory are becoming serious bottlenecks. In this paper, frequency domain analysis is made on image down-sampling,...
In recent years, cloud computing has emerged as a viable alternative for many computationally intensive applications. Offloading an application to the cloud has many advantages, but power consumption is still an important concern. Service providers should minimize power while maintaining customer's quality of service requirements. Dynamic Voltage and Frequency Scaling (DVFS) is an effective method...
The goal of the MobileASL (American Sign Language) research project is to enable sign language communication over the U.S. cellular network, which is low bandwidth and lossy. Data loss can greatly impact the quality of compressed video because of temporal and spatial error propagation. We investigate techniques to minimize the effect of data loss for improving compressed video sign language conversations...
Following with the advancements in digitization technology and broadband communication technology, realtime video streaming service has become an essential one for next generation Internet. When transmitting compressed video across the Internet, however, one of the main challenges is packet error/loss. High coding dependencies among video frames suffer from vulnerability to packet loss, which impacts...
Fully configurable video coding is a novel approach for video compression in which a video decoder can be dynamically constructed based on a decoder description. This paper uses a new syntax for describing video decoder functionality and structure, namely, the Decoder Description Syntax (DDS). The DDS is a platform-independent syntax that can define all aspects of a video decoder in terms of basic...
One of the major challenges for video collaboration lies in video conferencing in low bandwidth and low cost. In this paper we discuss about a server less desktop based video conferencing application that has been built around a highly bandwidth efficient H.264 video compression technology. The proposed solution offers a low cost multiparty video conferencing solution suitable for corporate environment...
Multiview coding is an enabling technique which facilitates stereo-vision and 3D applications. Compression ratios can be improved by taking reference frames across different viewpoints. However, the inter-view dependency yields additional drift errors. This paper applies multiple description coding technique for multi-view video to reduce the probability of corrupted video frames for streaming applications...
This paper focuses on the rate-distortion optimization of low-delay 3D video communications based on the latest H.264/MVC video coding standard. The first part of the work proposes a new low-complexity model for distortion estimation suitable for low-delay stereoscopic video communication scenarios such as 3D videoconferencing. The distortion introduced by the loss of a given frame is investigated...
In connection with the trend at Compression Solution For Monitoring Video Based On H.264, this paper propose an Efficient Compression Solution For Monitoring Video based on removal of redundant content, and describe it with the idea of Content Detection and Layered Quantization. This paper focus on the methods and implementation process of Macroblock-level layered quantization, and also analysis the...
Video compression and streaming over lossy wireless networks is the current trend in telecommunication and encouraged by major carriers to increase their services portfolio. However, the technological challenges are still tackled to enable the delivery of high quality video. In our previous work, we developed a per stream distortion model that is based on the extended Gilbert model. We expanded our...
This paper proposes a new method for digital video watermarking in compressed domain. Both the embedding and extracting phases are performed after entropy decoding. Consequently, fully decompressing the compressed video is not necessary making this scheme an appropriate choice for real-time application. Furthermore, taking the structural information into account leads to presenting a robust watermarking...
If the results of the latest studies for Internet usage are to be believed, worldwide 12 million TV consumers will be using Internet Protocol TV (IPTV) instead of the traditional TV broadcasting by the year 2010. These figures were published by ABI Research in 2006. Furthermore, analysts of Informa Telecoms & Media are forecasting the worldwide growth in revenue of IPTV to be ten billion dollar...
Modern multimedia workloads provide increased levels of quality and compression efficiency at the expense of substantially increased computational complexity. It is important to leverage the off-the-shelf emerging multi-core processor architectures and exploit all levels of parallelism of such workloads in order to achieve real time functionality at a reasonable cost. This paper presents the implementation,...
In this paper, a soft error resilient video encoder design is presented. The design uses the inherent architecture of modern video encoders as a basis for building a checksum based error detection mechanism. Modern video encoders use previously coded data in a video sequence as a reference to encode future data. Data prediction is efficient in terms of compression, but it enables errors to potentially...
H.264/AVC video encoding standard is a successful video compression standard after the MPEG-2/H.262. It's received much attention from academic and industrial fields. In this paper, rate control algorithm is discussed. By noticing that the H.264/AVC rate control algorithm has some disadvantages, two frame layer rate control improvement strategies are proposed in this paper, which are based on the...
Over the years it has been observed that a hacker, finds it less difficult to break any encryption key, even though it may require large number of attempts, specially with advent of high-speed machines. Therefore, an encryption method alone is not sufficient for copyright protection and ownership authentication of stored and streamed videos. Digital watermarking techniques have been proposed for this...
An H.264/AVC HP video decoder is implemented in 90nm CMOS. Its maximum throughput reaches 4096×2160@60fps, which is at least 4.3× higher than the state-of-the-art. By using partial MB reordering and lossless frame recompression, 51% of DRAM bandwidth is reduced which results in 58% DRAM power saving. Meanwhile, various efficient parallelization techniques contribute to a core energy saving of 54%.
Most research efforts have concentrated on advancement in video compression techniques resulting in DivX/Xvid codecs for better performance on handheld devices. Initial investigations reveal that these techniques are actually taking less time compared to entire execution time in a typical media playback system. However, it enlists that the buffer management methods employed in multimedia framework...
In this era of digital communications, video compression has become a necessity and plays an integral role that aids the widespread use of multimedia over the Internet. In the digital world, with the rapid growth of the Internet and the introduction of high-definition media, compression is used to exploit limited storage and transmission capacity as efficiently as possible. H.264/AVC is the latest...
Robust transmission of compressed video bit-streams over heterogeneous packet loss network is one of the key challenges in the contemporary video communication system. Recent researches have focused on enhancing error resilience of bit-stream through the deployment of transcoder between wired and wireless networks. However, the conventional error resilient algorithms (e.g., Intra refresh) through...
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