The goal of this article is to provide technical insights that will help developers of high performance DSP applications decide when and where to use PPC and DSP chips. This article concludes that the PPC typically outperforms DSP chips for real-time applications today, and industry professionals expect it to do so for the near future. However, data I/O management to and from the PPC is the critical parameter to manage, not numbers of adds and multiplies, as is typically the case for DSP chips. This parameter forces developers to change their design strategy from the Mega Floating-point Operations Per Second (MFLOPS) measure they have used with DSP chips to memory management measures like memory bandwidth and data block processing sizes. This article includes examples that illustrate these issues.
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