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Digital Audio and Speech Processing

COURSE: Digital Audio and Speech Processing

Code: ФЕИТ05004

ECTS points: 6 ECTS

Number of classes per week: 3+0+0+3

Lecturer: Assoc. prof. Zoran Ivanovski

Subject of the course content:

A system for transmition and storage of digital audio signals; sampling rate conversion (synchronous and asynchronous) and interpolation methods; oversampling, sigma/delta modulation; dither; noise shaping. Fundamentals of audio compression: characteristics of audio and speech signals; audio analysis – spectral analysis, cepstrum, zero-crossing, Linear Predictive Coding, Partial Correlation Coefficients (PARCOR), Line Spectral Pairs (LSP); lossy and lossless coding; psychoacoustic models; filter banks. Speech analysis and coding: speech waveform; time domain coding – Pulse Code Modulation (PCM); adaptive quantization; predictive  quantization; Adaptive Predictive Coding (APC); Adaptive Differential Pulse Code Modulation (ADPCM); frequency domain coding – Sub-Band Coding (SBC); Adaptive Transform Coding (ATC); APC with adaptive bit allocation; hybrid coding techniques; Code-excited linear prediction (CELP). Audio and speech synthesis: Waveform synthesis; analysis by synthesis; articulatory synthesis; rule-based synthesis; text-to-speech synthesis TTS. Speech and speaker recognition: basic principles; spectral criteria, spectral-domain method (SDM); dynamic time worping (DTW); Hidden Markov Models (HMM); Neural Network (NN) models. Audio effects and music synthesis: equalizers; time variant filters; delay lines; modulators; spatialization; time and frequency segment processing.

Literature:

  1. Udo Zolzer, “Digital Audio Signal Processing”, John Wiley & Sons Ltd., 2nd ed., 2008.
  2. Sadaoki Furui, ”Digital speech processing, synthesis and recognition”, Marcel Dekker Inc., 2nd ed., 2001.
  3. Mark Kahrs, Karlheinz Brandenburg ed., “Applications of Digital Signal Processing to Audio and Acoustics”, Kluwer Academic Publishers, 2002.
  4. Udo Zolzer, “DAFX - Digital Audio Effects”, John Wiley & Sons Ltd., 2002.