Dizajn sustava s mikrokontrolerom za generiranje i obradu audiosignala

master's thesis

• Title (english): Design microcontroller system for generating, acquiring and processing sound
• Author: Karlo Uchytil
• Mentor: Antonio Petošić (mentor)
• Committee member: Antonio Petošić (predsjednik povjerenstva)
• Committee member: Kristian Jambrošić (član povjerenstva)
• Committee member: Marko Horvat (član povjerenstva)
• Granter: University of Zagreb; Faculty of Electrical Engineering and Computing; Zagreb
• Defense date and country: 2017-02-24, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Electrical Engineering

Abstract

Mikrokontroler je sastavni dio ugradbenih računalnih sustava koji se dizajniraju za specifičnu namjenu pa tako i za digitalnu obradu signala u audio primjene. U ovom radu opisuje se rad s mikrokontrolerom MSP432 iz ARM Cortex-M4 serije koja podržava DSP naredbe. U audio sustavima s mikrokontrolerom potrebni su akustički senzori (mikrofon, zvučnik) radi razmjene signala s okolinom. Kod obrade zvučnog signala potrebno ga je najprije očitati i pohraniti u digitalni zapis putem postupka analogno digitalne pretvorbe. Za prikaz spektra signala, tj. prebacivanje iz vremenske domene u frekvencijsku radi kvalitetnije analize često se koristi FFT, algoritam za brzo računanje Fourierove transformacije. Za generiranje zvuka potrebno je poznavati principe digitalno analogne pretvorbe.

Abstract (english)

A microcontroller is an integral part of embedded systems that can be designed for a specific purpose as well as for digital signal processing in audio applications. This paper describes the work with microcontroller MSP432 of ARM Cortex-M4 series that supports DSP instructions. Audio systems with microcontroller require acoustic sensors (microphone, speaker) to exchange signals with the environment. When processing the audio signal it is necessary to convert it to a digital format using an analog to digital converter (ADC). FFT, an algorithm for fast computation of Fourier transform is often used to convert a signal from time domain to frequency domain (and display its spectrum) for purpose of better analysis. Sound generation requires knowledge of digital to analog conversion (DAC) techniques.

• Keywords: mikrokontroler; audio primjene; A/D i D/A pretvorba; FFT
• Keywords (english): microcontroller; audio applications; ADC; DAC; FFT
• Language: croatian
• URN:NBN: urn:nbn:hr:168:681266
• Study programme: Title: Electrical Engineering and Information Technology; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra inženjer/inženjerka elektrotehnike i informacijske tehnologije (magistar/magistra inženjer/inženjerka elektrotehnike i informacijske tehnologije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Closed access
• Created on: 2019-03-14 01:45:18