Courses – Fakultet tehničkih nauka u Novom Sadu

Subject: Digital audio signal processing (17.EK422L)

Native organizations units: Department of Power, Electronic and Telecommunication Engineering

Type of studies	Title
Master Academic Studies	Engineering Animation (Godina: 1, Winter)
Master Academic Studies	Engineering Animation (Godina: 1, Winter)

General information:

Category	Scientific-professional
Scientific or art field	Telecommunications and Signal Processing
Interdisciplinary	No
ECTS	5

Educational goal:

The course objective is to deepen the knowledge of students of animations in engineering related to audio signals, especially about speech and music. In order to work with audio signal digital processing professionally, engineers should have good understanding of spoken and music signal characteristics, as well as the knowledge of their processing and transmission possibilities.

Educational outcome:

In the lectures students gain fundamental knowledge about both speech and music signals. Based on that, they are able to work on audio processing and analysis, as well as compression, coding and transmission of audio signals in a competent way. They will learn to make processing of music signals and apply audio effects. They also get basic knowledge necessary for working on speech technologies and audio forensics. They will be able to assess acoustic environment and measure the intelligibility of speech and music quality professionally. They gain practical experience with audio equipment, music instruments and software for digital audio signal processing.

Course content:

•Voice production, transmission, and perception. Modelling of speech production and perception. •Speech signal analysis in time and frequency domains. Digital analysis and coding of speech signal (PCM, LPC, CELP). •Coding and transmission of speech signal (G.711(64kbps), ADPCM(32), G.728(16), GSM(13), CELP(4), LPC(2.4)). •Speech quality evaluation and speech intelligibility measurements (objective measurements and subjective assessment of acoustical characteristics of voice). •Introduction to speech technologies: automatic speech recognition, speaker and emotion recognition, text-to-speech synthesis. •Introduction to audio forensics. Forensic speaker recognition. •Characteristics of music signals. Music instruments, placement of microphones for recording of orchestra. •Studio equipment and audio signal processing (multi-channel recording and surround systems (5.1, 7.1, 10.2,...), audio-visual controls, mixing, level regulation, filters, regulation of dynamics and reverberation, echo, panorama, monitoring and sound editing, sound analysis and synthesis). •Acoustical quality of both professional rooms and systems for sound recording and reproduction (objective measurements and subjective assessments of sound area features, optimal conditions for sound recording and reproduction). •Audio systems for recording of voice and music program and audio effects (selection and placement of microphones, sound for film and video). •Formats for recording, transmission and storing of audio information in multimedia environment on a computer (MIDI, MPEG, HD and 3D sound). •Standards for coding/compression and transmission of audio signals (Dolby, AAC, MPEG). •Audio signal broadcasting (FM stereo, RDS) and digital audio transmission (GSM, VoIP, DAB - digital radio).

Teaching methods:

Lectures are performed with PowerPoint presentations accompanied by numerous audio and video attachments and animations. The first part of the course (speech signals) is followed by exercises in the Laboratory of Acoustics and Speech Technologies, while the second part (music signals) is followed by exercises in a sound studio at FTS. Visits to Studio Berar and Radio Novi Sad are arranged, where students can learn more about audio engineering, music production, and digital audio signal processing. The exam prerequisites are a seminar work and 3 of 4 tests - the condition for entering the exam is 25 of 50 points. Seminar works are done individually, while the best from some topics are presented and bring additional points to the teams. The first part of the exam can be passed through the colloquium in the middle of the semester. Independent student work is supported through the web portal of the Chair of Communications and Signal Processing - www.telekom.ftn.uns.ac.rs.

Literature:

Authors	Title	Year	Publisher	Language
Slobodan Jovičić	Govorna komunikacija - fiziologija, psihoakustika i percepcija	1999	Nauka, Beograd	Serbian language
B. Gold and N. Morgan	Speech and Audio Signal Proc. - Proc. and Perception of Speech and Music	2000	JW&S	English
Vlado Delić	Audio-izdanje udžbenika i prezentacija u okviru CABUNS-a	2017	Univerzitet u Novom Sadu	Serbian language

Knowledge evaluation:

Course activity	Pre-examination	Obligations	Number of points
Term paper	Yes	Yes	20.00
Test	Yes	Yes	10.00
Written part of the exam - tasks and theory	No	Yes	50.00
Test	Yes	No	10.00
Coloquium exam	No	No	20.00
Test	Yes	Yes	10.00
Presentation	Yes	No	10.00
Test	Yes	Yes	10.00