General Course Information
This course replaces Digital Audio Signal Processing and Active Noice Control.
| Course code | VTA132 (7.5 credits) |
| Lecturer | Wolfgang Kropp, Jens Ahrens |
| Assistant | Thomas Deppisch (DSP exercise) |
| Lecture hall | Lecture room at TA |
| Grading | Home assignments and lab report |
| Course PM |
Noteboard
2022-08-09 by Jens Ahrens
Welcome to the course! We’ll start on Tues., Aug. 30 at 10.00 h in the TA lecture room.
Course Materials
Lecture
- DSP1: Quantization, AD/DA conversion (pdf, pdf)
- DSP2: LTI systems, nonlinear systems (pdf, pdf)
- DSP3: Digital Filters (pdf)
- DSP4: Measurement of LTI systems (pdf)
- DSP5: Perceptual audio coding (pdf)
- DSP6: Fractional delays (pdf)
- DSP7: Dynamic range control (pdf)
- DSP8: Numerical methods (pdf)
- ANC1: Lecture 1
- ANC2: Lecture 2
- ANC2: Lecture 3
- ANC2: Lecture 4
- ANC2: Lecture 5
- ANC2: Lecture 6
- ANC2: Lecture 7
- ANC2: Lecture 8
- ANC2: Lecture 9
- ANC2: Lecture 10
- ANC2: Lecture 11
- ANC2: Lecture 12
Exercise Lessons
- Introduction Slides
- E1: Matlab Live Script with general concepts
- E2: Matlab Live Script about the DFT and quantization
- E3: Matlab Live Script about FIR and IIR filtering
- E4: Matlab Live Script for measurement analysis
- E5: Matlab Live Script for dynamic processing
- E6: Matlab Live Script for the LMS filter
Assignments
- A1: Sampling, Quantization, Dithering
- A2: Filters, speech.wav
- A3: Measurements, system.zip
- A4: Dynamic Processing
- A5: LMS Filter, additional files
ANC Lab
Implementation of an ANC system in a ventilation duct. The work is strongly linked to the lectures. The laboratory work is mandatory and the final report of the work is a part of the examination. The work starts with an introduction (see course pm). This lecture is compulsory. There are no fixed times for the laboratory work given in the main schedule of the Masters Programme. More information is given during the course.
Matlab Examples ANC
- ANC LMS-Demo: LMS_DEMO
- ANC Files: Lab Files
- ANC Files: Lab PM part 1
- ANC Files: Lab PM part 2
- ANC Files: Lab PM part 3
- ANC Files: Lab PM part 4
- ANC Files: Lab PM part 5
Literature
DSP
- Introduction to Audio Processing (accessible with Chalmers IP)
- DSP Guide by S. W. Smith
- Mathematics of the Discrete Fourier Transform (DFT) With Audio Applications by J. O. Smith III
- All the other online books by J. O. Smith III
- Filters (with coefficient tables)
- All About Audio Equalization: Solutions and Frontiers
- H1 estimator
- Sweep measurements
- IEEE Magazine article on fractional delays by Laakso et al. (accessible with a Chalmers IP) (Matlab toolbox)
- Dynamic range control
ANC
- Nelson, P. A., Elliot, S. J., “Active Control of Sound”, Academic Press (1992). This is available at Chalmers Library as e-book. In addition, the lecture notes above are used.
- Reading Advice ANC