Czasopismo | ELEKTRONIKA - KONSTRUKCJE, TECHNOLOGIE, ZASTOSOWANIA | Rocznik 2011 - zeszyt 11

Time constraints analysis of data-driven multimedia algorithms in Networks on Chip

nr katalogowy: 64069

Modern multimedia algorithms are usually data-dominated and require an immense amount of computation [14, 15]. However, these algorithms can be divided into stages that are implementable in separate units of computation (cores). Thanks to this property, they can use parallel and distributed computing working in a manner similar to pipeline and transfer their streams in the form of relatively large, but usually fixed amount of data. In these applications, it is usually required to maintain the established quality of service and satisfy the constraints in real-time [15]. Multi-Processor System on Chips (MPSoCs) are often considered as the best tailored hardware for these applications [10]. In each of the MPSoC processing units one processing step can be computed, but it is still a problem to connect these units together. The simplest point to point (P2P) connections require too much space, and the bus-based connections linking a large number of cores result in many conflicts and, consequently, in spite of various arbitration techniques, decrease the overall system performance [11]. In addition, both P2P and bus-projects do not scale well with the growing number of independent intellectual property (IP) cores required by contemporary hardware to deal with a number of different algorithms in a single system [2]. To overcome these obstacles, a Network-on-Chip (NoC) design paradigm for implementing distributed computing systems has been introduced [4]. The growing popularity of this approach can be attributed to fewer conflicts in a chip with many cores in comparison with the traditional approaches. It is reported that the NoC architecture offers high throughput and reliable communication, but requires additional mechanisms to overcome the problems typical for packet switching communication, such as packet deadlock or starvation. Due to the difference with the traditional computer networks, popular techniques for dealing with these [...]

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