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Node mobility, signal fading and interference introduce dynamics in wireless channels. In 802.11 wireless networks, there are several transmission rates that can be adaptively selected by the MAC-layer rate control mechanisms to cater for various channel conditions. Accurately estimating the current channel conditions and successfully selecting the appropriate rates at the right time is critical to...
Network-on-Chip (NoC) has been widely accepted as one of the most promising on-chip communication architectures for many-core Systems-on-Chip (SoC). With billions of transistors integrated on a single chip, inter-component communication becomes more and more complicated and power hungry. By leveraging the existing technologies of computer networks, NoC enables the on-chip communication to be simpler...
In recent years, 3D related applications, including 3D movie and 3DTV, are getting more and more attentions. In order to make the real-time 3D applications feasible, efficient multiview video coding (MVC) scheme is desired. However, the system throughput requirement on a high definition (HD) MVC encoder is at least two times higher than the current highest throughput H.264/AVC encoder design. In order...
The 802.11 standards specify several transmission rates that can be used at the MAC layer protocol to adapt the transmission rate to channel conditions. Such dynamic adaptations can improve per-hop performance in Wireless Networks and therefore can have impact on the Quality of Service provided for communicating applications. In this paper we present a comprehensive evaluation of the performance of...
Fractional motion estimation (FME) is widely used in video compression standards. In H.264/AVC, the precision of motion vector is down to quarter pixels to improve the coding efficiency. However, FME occupies over 45% of the computation complexity in an H.264 encoder and this high complexity limits the processing capability. In this paper, a single-iteration full search FME is proposed. By the algorithm...
The proposed MVC encoder chip is characterized as follows: 1) View-parallel MB-interleaved (VPMBI) scheduling with 8-stage MB pipelining is introduced to overcome the first 2 challenges. With this technique, the processing capability is 212 Mpixels/s, at least 3.4times better than the previous works. In addition, view scalability is achieved and supports real-time processing from single-view 4096times2160p...
External memory bandwidth is an important issue in system-on-chip (SoC) systems. Especially in high definition (HD) video coding, the bandwidth requirement of off-chip memory is critical in video processing. In recent researches, embedded compression shows high potential on off-chip memory bandwidth reduction. Works about embedded compression have been done for low power applications. However, there...
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