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A 4K×2K H.265/HEVC video codec chip is fabricated in a 28nm CMOS process with a core area of 2.16mm2. This LSI chip integrates a dual-standard (H.265 and H.264) video codec and a series of prevalent (VC-1, WMV-7/8/9, VP-6/8, AVS, RM-8/9/10, MPEG-2/4) decoders into a single chip. It contains 3,558K logic gates and 308KB of internal SRAM. Moreover, it simplifies intra/inter-rate-distortion optimization...
A threshold secret sharing scheme can deliver important content reliably using redundant delivery routes via a network. Furthermore, simultaneous delivery of the threshold secret shared content to multiple receivers can achieve efficient resource utilization thanks to multicast and network coding techniques. Nevertheless, the network coding technique results in a tradeoff between reliability and efficiency...
Current studies about decoding Fast protocol in the FPGA platform are always implemented using serial communication technique and for some certain Fast Templates. This paper presents the FPGA hardware design of accelerating the decoding process in parallel and cutting down the cost of changing Fast Templates with flexible decoders. The complete system has been simulated and tested in SystemC Platform.
A number of binary modulation schemes are proposed for LED based Visible Light Communication (VLC) systems to jointly achieve data transmission and brightness control. These binary modulation based solutions are spectrally inefficient because they consider the LED light source as single device. We observe that most of the commercial LED lights use more than one LED per light source and the possibility...
Data reliability is a significant issue in large-scale storage systems. Erasure codes provide high data reliability via data recovery, which however generates a large amount of data transmission in the network. The bandwidth cost of transmitting the recovery needed data significantly impacts the performance of the located cluster. Existing work considers the single-failure as the most common failure...
WLANs currently do not provide a robust solution for reliable data multicast. Multicast packets are delivered to multiple users as a simple broadcast service without support for Automatic Repeat Request. Hence, a fixed low speed transmission mode is generally used to improve the reliability of multicast files. However, this results in the inefficient use of bandwidth. This paper proposes a reliable...
An 8 bit 1GSPs DAC targeting transmitters for mobile communications terminals has been implemented in 0.18µm TSMC technology. A correction scheme is used for the current sources in order to achieve a SFDR greater than 50dB after layout parasitic extraction in the 10MHz bandwidth. The simulated values for INL/DNL are 0.268 LSB and 0.377 LSB respectively. A 5+3 segmented architecture is used in order...
A demonstration of FPGA-based 3840×2160 UHDTV (Ultra-high definition TV) H.264 video decoding and displaying system is proposed in this paper. The proposed system can decode and display 3840×2160 video by two Altera Stratix III DE3 FPGA boards, which are connected together with each other by HSTC cable. Video processing system requires high memory bandwidth. This paper locate decoder module and display...
In order to reduce video network transmission delay, congestion and packet loss rate, the authors propose an algorithm of video network transmission based on unbalanced multiple description coding. Based on the detection of network link available bandwidth, we predict congestion state of the network link according to Markov model, then adjust video transmission path. Comparing with the random early...
Current generation GPU's are really powerful, with lots of stream processors, fast memory and in some cases hardware video decoding support. Their prices are low and support multiple high resolution outputs. Its main use is in CAD applications and Video-games due they geometry processing capabilities, but they are really good at image processing. That makes them ideal for CCTV rendering. Traditional...
With the fast development of mobile technologies and wireless Internet access, video streaming share grows rapidly. New HEVC (High Efficiency Video Codec) standard was introduced by ITU-T in 2013. It increases compression rate and, in the same time, computational efforts. Thus development of efficient decoding systems for mobile platforms becomes actual problem. This paper is dedicated to analysis...
Wireless video multicast has become one of the key technologies to wireless applications. But the main challenge of wireless video multicast, i.e. the “cliff effect”, remains to be solved. SoftCast is a novel video coding and transmission scheme which allocates power to different coefficient chunks and transmits analog signals directly without quantization and entropy coding. It can solve the “cliff...
In a short-range multiple-input and multiple-output (SR-MIMO) transmission system that relies on line-of-sight (LOS) propagation, the channel matrix is determined by the antenna geometry, hence radio frequency (RF) signal processing by using an analog matrix circuit is a valid means of separating spatially-multiplexed multiple signal streams. To date several simple decoding methods utilizing this...
Software defined radio (SDR) is characterized by its flexibility and convenience of modification, because significant amounts of signal processing are handed over to the general-purpose processor (GPP), rather than being done in special-purpose hardware. In the long term, software-defined radios work well in low data transmission rate systems such as 2G/3G cellular systems and other wireless radio...
Usage of mobile devices for multimedia content playback is drowning the battery power rapidly. High quality videos which are streamed from the internet are power consuming and demand high network bandwidth. We measured the power consumption and bitrate of video sequences in respect to different spatial resolutions and used acceptability-based Quality of Experience (QoE) model for determining the impact...
Nowadays, the request for wireless services is greatly exploded to receive a good services from internet. So, many APs for WLAN are thoughtlessly deployed in various places. At this environments, inter-basic service set (BSS) interference might be happened. If the APs locating in same overlapped region are operated in the same channel, the CSMA/CA is well worked, that is multiple APs are operated...
This paper presents a motion compensation (MC) architecture for 8K UHDTV HEVC video decoder. UHDTV's high resolution significantly increases throughput and memory traffic. Moreover, HEVC supports new coding tools like various sizes of coding unit ranging from 8 to 64. To solve these problems, we propose three optimization schemes. Firstly, four-bank parallel 2D cache organization is proposed to reduce...
Video transport over HTTP is becoming more and more popular. Many video service providers construct huge content distribution networks(CDN) to support HTTP streaming service, however, they seldom exploit the benefits of multiple servers to achieve higher bandwidth and reliability by parallel streaming. In this paper, we study the problem of jointing multi-CDN and LT-coding for video transport over...
DRAM memory is a major contributor for the total power consumption in modern computing systems. Consequently, power reduction for DRAM memory is critical to improve system-level power efficiency. Fine-grained DRAM architecture [1, 2] has been proposed to reduce the activation/ precharge power. However, those prior work either incurs significant performance degradation or introduces large area overhead...
This paper presents a hardware-efficient algorithm for external memory bandwidth reduction focusing on the state-of-the-art video encoders, like H.264/AVC and HEVC. The proposed approach is a lossless solution based on an adaptation of the traditional Huffman algorithm. This solution is entitled RFCAVLC8T (Reference Frame Context Adaptive Variable-Length Coder with 8 Tables) and is based on the use...
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