Keshab K. Parhi教授课件.pdfVIP

VLSI Digital Signal Processing Systems Keshab K. Parhi VLSI Digital Signal Processing Systems • Textbook: – K.K. Parhi, VLSI Digital Signal Processing Systems: Design and Implementation, John Wiley, 1999 • Buy Textbook: – http://www.bn .com – – http://www.bestbookbuys .com Chap. 2 2 Chapter 1. Introduction to DSP Systems • Introduction (Read Sec. 1.1, 1.3) • Non-Terminating Programs Require Real-Time Operations • Applications dictate different speed constraints (e.g., voice, audio, cable modem, settop box, Gigabit ethernet, 3-D Graphics) • Need to design Families of Architectures for specified algorithm complexity and speed constraints • Representations of DSP Algorithms (Sec. 1.4) Chap. 2 3 Typical DSP Programs • Usually highly real-time, design hardware and/or software to meet the application speed constraint samples in DSP System out • Non-terminating – Example: for n 1 to y ( n ) a x ( n ) b x ( n 1) c x ( n 2 ) end nT 3T 2T T 0 Algorithms out .… signals Chap. 2 4 Area-Speed-Power Tradeoffs • 3-Dimensional Optimization (Area, Speed, Power) • Achieve Required Speed, Area-Power Tradeoffs • Power Consumption P C V2 f • Latency reduction Techniques = Increase in speed or power reduction through lower supply voltage operation • Since the capacitance of the multiplier is usually dominant, reduction of the number of multiplications is important (this is possible through strength reduc