Digital Speech Transmission

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Lecturer: Prof. Dr.-Ing. Peter Jax

Contact: Christiane Antweiler, Maximilian Kentgens

Type: Master lecture

Credits: 4

Campus Lecture
Campus Exercise
Learning room L2P
(Registration via campusOffice)

Course language: English

The textbook "Digital Speech Transmission" is used as lecture notes. It can be lent in the university library or in the Institute.

All powerpoint slides of the lecture and the problems of the exercise will be sold during the first lecture as well as by Irina Ronkartz.

These scripts are also available for download at the L²P learning room


Will be announced.

The lecture "Digital Speech Transmission" goes back to the lecture "Digital Speech Processing I" (winter term 2017/2018).

The lectures "Digital Speech Transmission" is amongst others part of the master studies compulsory elective modules

  • Information and Communication Technology: IK.A
  • Micro- and Nanoelectronics: MN.C
  • Computer Engineering: TI.A
  • Biomedical Engineering: BMT.B

or can be chosen as elective modules.

We recomment the lecture "Audio Signal Enhancement", which takes place in the summer term, for further studies.


The lecture "Digital Speech Transmission" deals with the fundamentals of speech production, hearing, psycho-acoustic aspects and speech coding.

  • Spectral transformations
  • Stochastic signals and estimation
  • Linear prediction
  • Quantization
  • Speech coding: model-based predictive coding, vocoder, adaptive quantization, adaptive prediction in the time domain, adaptive coding in the frequency domain, subjective speech quality, standards, realization aspects
  • Error concealment and soft decision source decoding, reduction of annoying effects due to residual bit errors

The aim of this lecture is to teach on the one hand side the fundamental techniques and algorithms of digital speech processing. On the other hand side an overview of the state-of-the-art technology, actual applications and standards is presented. Exercises are offered for the course. Particular topics can be examined at the laboratories "Communications Engineering", "Real-Time Audio Processing", and "Matlab Advanced - Digital Signal Processing" in experiments which are coordinated with this lecture.

The lecture relies on the book: "Digital Speech Transmission", P. Vary, R. Martin, Wiley 2006.


The results of the evaluation of the last years are summarized below. Note: Since the lecture has been renamed in 2018, some evaluations are titled with the previous lecture name Digital Speech Processing I.

Winter term 2017/2018

Participants of the evaluation: 17
Global grade: 1,3
Conzept of the lecture: 1,3
Instruction and behaviour: 1,3

Participants of the evaluation: 14
Globalindikator: 1,4
Conzept of the exercise: 1,5
Instruction and behaviour: 1,3