CNSCC.160 – Focus on Speech Processing
Practical Session for Week 6
Audio Data and Quantization Effects using MATLAB
In previous practical sessions, you familiarised yourselves with the MATLAB environment.
You are now expected to know how to operate MATLAB and how to use basic commands of
MATLAB. This practical session focuses on audio signals instead of images and will help you
to learn some basic operations for speech and audio data, including how to read/write
audio files, play their audio content and plot figures.
Basic MATLAB Operations for Speech and Audio Data
In these notes, all commands that can be typed in MATLAB are typed in a plain font. You
can cut and paste commands from this document directly into the MATLAB command
window. Alternatively you can create your own MATLAB command file with:
edit exer1.m
You can then type or cut-and-paste in commands. Save your work and then run the contents
of the file at the MATLAB prompt:
exer1
For more information on any MATLAB commands, you can access the help pages either
from the main menu, or by typing “doc ” or “help