Bitrate

The bitrate (or bit rate) of a signal is the number of bits required to store, or transmit, 1 s of that signal. A bit is a binary number: either 0 or 1. Let’s calculate the bitrate of a digital waveform. First you should revise the concepts of sampling and quantisation from this module of the […]

Module 3 – Digital Speech Signals

What are spectrograms really? An introduction to Digital Signal Processing and the Discrete Fourier Transform

Wayland (Phonetics) – Chapter 5 – Phonemic and Morphophonemic Analysis

An introduction to the concept of phonemes, allophones and some common phonological alternations.

Wayland (Phonetics) – Chapter 8 – Acoustic Properties of Vowels and Consonants

An overview of the properties of vowels and consonants

Handbook of phonetic sciences – Ch 20 – Intro to Signal Processing for Speech (Sections 6-7)

Written for a non-technical audience, this gently introduces some key concepts in speech signal processing. Read sections 6-7.

Handbook of phonetic sciences – Ch 20 – Intro to Signal Processing for Speech (Sections 1-5)

Written for a non-technical audience, this gently introduces some key concepts in speech signal processing. Read sections 1-5 (up to and including ‘Fourier Analysis’).

Readings

Wayland (Phonetics) – Chapter 7 – Digital Signal Processing

An intuitive introduction to acoustics digital signal processing

Wayland (Phonetics) – Chapter 6 – Basic Acoustics

A concise introduction to acoustics: sounds, resonance, and the source-filter theory

Lab

This is a SIGNALS tutorial in which you will work with speech signals. These labs follow on directly from those in Module 3 (Digital Speech Signals). You can find info on how to download and get started with Jupyter Notebooks in the Module 3 lab tab. You can find a github repository for the signals […]

Videos

Total video to watch in this section: 62 minutes.  The first four videos (Time domain, sound source, periodic signal, pitch) overlap with the Module 2 videos but were made by Simon King from a more engineering perspective.  You may find them useful for consolidation.   The core of this module starts with Digital Signals.

Module 3 – Digital Speech Signals

What are spectrograms really? An introduction to Digital Signal Processing and the Discrete Fourier Transform