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This paper presents a practical methodology for designing, implementing and deploying IPv6 networks. We use a virtual lab to simulate topologies for different scenarios. These topologies are designed programmatically and then, tested for connectivity and efficiency. In particular, these scenarios include translation mechanisms such as DNS64 and NAT64, tunneling mechanisms such as 6to4 and 6RD and...
HEVC is the newest standard developed by the Joint Collaborative Team on Video Coding (JCT-VC), mainly characterized by improving the encoding performance and efficiency in almost 50% of its predecessor, H.264/AVC for the same video quality. HEVC is also characterized for targeting Ultra High Definition (UHD) video streams e.g. 4k and 8k resolutions. These improvements resulted from the enhance of...
HEVC is the newest standard developed by the Joint Collaborative Team on Video Coding (JCT-VC). HEVC or H.265 includes several modifications compared with its predecessor the H.264/AVC, especially those involved in Fractional Motion Estimation (FME). This work is focused on the FME process that is an important part of an HEVC CODEC, because of its high computational complexity that demands a 40–60%...
This paper presents a strategy for implementing the discrete time version of the Nonlinear Energy Operator (NEO). The proposed implementation approach is based on the utilization of a circuit that produces an output current proportional to the square of its input voltage, which we call transconductor-squarer circuit. In order to avoid adverse effects of mismatch between circuits that should be identical,...
The H.264/AVC is the Standard Video Format used by the SBTVD (Sistema Brasileiro de Televisão Digital), with presence in almost all the countries in South America, that allows transmissions in Full High Definition (Full HD) video quality. So this work presents a hardware architecture design of the Motion Estimation algorithm used in the Standard, as the higher computational processing is located in...
Vehicular Ad Hoc Networks (VANETs) require some mechanism to authenticate messages, identify valid vehicles, and remove misbehaving ones. A Public Key Infrastructure (PKI) can provide this functionality using digital certificates. In PKI, key management and corresponding issuance and revocation of digital certificates is one of the key issues that have to be solved. The IEEE 1609.2 standard states...
A digital system architecture for a three-input one-output zero-order ANFIS (Adaptive Neuro-Fuzzy Inference System) is presented. The proposed architecture takes into account that the training process is done off-line in the MATLAB environment. The system is implemented as a nonlinear-function generator for test purposes. Post-place and route simulation results obtained on a Xilinx Spartan-3 XC3S200...
The H.264/AVC is the newest digital video compression standard developed by the Joint Video Team (JVT). This standard includes new algorithms as the Fractional Motion Estimation that enhances the coding efficiency and compression rate of video sequences implicating a higher computational complexity. The H.264/AVC is most commonly used for High Definition Video (HDTV) real-time broadcasting for Digital...
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