Introduction Advantage of DSP Better signal quality repeatable

Introduction Advantage of DSP: - Better signal quality & repeatable performance - Flexible Easily modified (Software Base) - Handle more complex processing that impossible with analog circuitry Disadvantage of DSP: - Limited to signal with relatively LOW BANDWITH - Flexible Easily modified (Software Base) - Handle more complex processing that impos sible with analog circuitry

Introduction Application of DSP Signal Analysis / Feature Extraction - Extract useful information from a given signal (Speaker and Speech recognation, location and identifi cation of target, etc) Signal Filtering / Shaping Technique - Improve the quality of a given signal (Removal of noise and interference, spliting signal into simpler component, time domain and frequency domain averaging, etc) Speech Processing - CD, Speech recognition & synthesis, compression, etc

Introduction Application of DSP Image Processing - Image enhancement, Image compression, Feature ectraction, etc Communication - Radio Modulator Demodulator (MODEM) - Echo cancellation -etc

What Is DSP? Analog Computer a bit loud Digital Computer DSP DAC ADC 1010 1001 OUTPUT

A Typical DSP System MEMORY DSP Chip l Memory l Converters (Optional) l ADC l Analog to Digital l Digital to Analog DSP DAC PORTS l Communication Ports l Serial l Parallel

Digital Computers von Neuman Machine A STORED PROGRAM AND DATA D INPUT/ OUTPUT ARITHMETIC LOGIC UNIT A = ADDRESS D = DATA Harvard Architecture A A ARITHMETIC LOGIC UNIT STORED PROGRAM D INPUT/ OUTPUT STORED DATA D

DSP Development ADD A, B 11100010010100001001 HIGH-LEVEL LANGUAGE ASSEMBLER EMULATOR CODE TEST S/W DESIGN N DSP OK? Y Tools of the Trade PRODUCT

Programmability l One Hardware = Many Tasks SOFTWARE 1 SOFTWARE 2 . . LOW-PASS FILTER SAME HARDWARE SOFTWARE N l . . MUSIC SYNTHESIZER MOTOR CONTROL Upgradability and Flexibility l Develop New Code Upgrade l Analog Solder New Component

Analog Advantages 1. Low cost and simplicity in some applications 1. Attenuators/amplifiers 2. Simple filters 2. Wide bandwidth (GHz) 3. Low signal levels 4. Infinite effective sampling rate 1. Infinite resolution in frequency 2. No aliasing/reconstruction issues 5. Infinite resolution in amplitude 1. No quantitation noise

Digital Signal Processing (DSP) Advantages l Repeatability – Low sensitivity to component tolerances – Low sensitivity to temperature changes – Low sensitivity to aging effects – Nearly identical performance from unit to unit – Matched circuits cost less l High noise immunity l In many applications DSP offers higher performance and lower cost – CD players versus phonographic turntable