Ivan Saraiva Silva

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This work presents a memory hierarchy model for a full search motion estimation core. The motion estimation is the most complex module in a video encoder requiring intensive computation and high memory bandwidth, mainly when the focus is high definition videos. The proposed memory hierarchy model is based on a data reuse scheme considering the full search(More)
The increase of stream-based applications complexity has demanded hardware more flexible and able to reaching higher performance. Reconfigurable architectures have been showed significant progresses in exploiting the parallelism of these applications. This paper presents RoSA, a coarse-grained reconfigurable architecture that combines compilation techniques(More)
Cache coherency and cache consistency in NoC-based heterogeneous platforms are still open problems. Current works addressing platform design avoid this issue either by proposing cacheless implementations or using snoopy protocols over buses. This paper addresses the cache coherence problem in a NoC-based MPSoC platform, focusing the communication(More)
This paper analyzes the utilization of a network on chip (NoC) as the communication sub-system of a reconfigurable/parallel architecture. A router was designed and implemented in SystemC to analyze the NoC. With this routers the NoCX4 was created and simulated using coarse-grained reconfigurable microprocessor as processing nodes. To perform the simulation(More)
This paper presents the design and implementation of a multiplierless JPEG compressor for gray scale images. The modules of this architecture were fully pipelined and targeted to FPGA device implementation. The designed architectures are detailed in this paper and they were described in VHDL, simulated and physically mapped to Altera Flex10KE FPGAs. The(More)
This paper presents new techniques for architecture and performance driven compilation of SW programs into RW (reconfigurable HW). These new techniques effectively improve on the complex resource sharing approaches typical of high-level synthesis algorithms, which are efficient for layout flexible ASICs but are clearly not adequate for reconfigurable(More)