Module Description

Module: Digital Audio Signal Processing


Digital Audio Signal ProcessingLecture3Winter Semester
Digital Audio Signal ProcessingRecitation Section (large)1Winter Semester

Module Responsibility:

Prof. Udo Zölzer

Admission Requirements:


Recommended Previous Knowledge:

Signals and Systems

Educational Objectives:

Professional Competence

Theoretical Knowledge

Die Studierenden können die grundlegenden Verfahren und Methoden der digitalen Audiosignalverarbeitung erklären. Sie können die wesentlichen physikalischen Effekte bei der Sprach- und Audiosignalverarbeitung erläutern und in Kategorien einordnen. Sie können einen Überblick der numerischen Methoden und messtechnischen Charakterisierung von Algorithmen zur Audiosignalverarbeitung geben. Sie können die erarbeiteten Algorithmen auf weitere Anwendungen im Bereich der Informationstechnik und Informatik abstrahieren.


The students will be able to apply methods and techniques from audio signal processing in the fields of mobile and internet communication. They can rely on elementary algorithms of audio signal processing in form of Matlab code and interactive JAVA applets. They can study parameter modifications and evaluate the influence on human perception and technical applications in a variety of applications beyond audio signal processing. Students can perform measurements in time and frequency domain in order to give objective and subjective quality measures with respect to the methods and applications.

Personal Competence

Social Competence

The students can work in small groups to study special tasks and problems and will be enforced to present their results with adequate methods during the exercise.


The students will be able to retrieve information out of the relevant literature in the field and putt hem into the context of the lecture. They can relate their gathered knowledge and relate them to other lectures (signals and systems, digital communication systems, image and video processing, and pattern recognition). They will be prepared to understand and communicate problems and effects in the field audio signal processing.

ECTS-Credit Points Module:



Written exam

Workload in Hours:

Independent Study Time: 124, Study Time in Lecture: 56

Course: Digital Audio Signal Processing


Udo Zölzer




Winter Semester


  • Introduction (Studio Technology,  Digital Transmission Systems, Storage Media, Audio Components at Home)

  • Quantization (Signal Quantization, Dither, Noise Shaping, Number Representation)

  • AD/DA Conversion (Methods, AD Converters, DA Converters, Audio Processing Systems, Digital Signal Processors, Digital Audio Interfaces, Single-Processor Systems, Multiprocessor Systems)

  • Equalizers (Recursive Audio Filters, Nonrecursive Audio Filters, Multi-Complementary Filter Bank)

  • Room Simulation (Early Reflections, Subsequent Reverberation, Approximation of Room Impulse Responses)

  • Dynamic Range Control (Static Curve, Dynamic Behavior, Implementation, Realization Aspects)

  • Sampling Rate Conversion (Synchronous Conversion, Asynchronous Conversion, Interpolation Methods)

  • Data Compression (Lossless Data Compression, Lossy Data Compression, Psychoacoustics, ISO-MPEG1 Audio Coding)


- U. Zölzer, Digitale Audiosignalverarbeitung, 3. Aufl., B.G. Teubner, 2005.

- U. Zölzer, Digitale Audio Signal Processing, 2nd Edition, J. Wiley & Sons, 2005.

- U. Zölzer (Ed), Digital Audio Effects, 2nd Edition, J. Wiley & Sons, 2011.