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Introduction: Characteristics of audio and music signals; digitization of audio signal; bandwidth; precision, and signal-to-quantization noise ratio ; over-sampling A/D conversion; digital processing of audio signals; digital filtering; microphone and loudspeaker characteristics; sound propagation in different environments; human auditory perception; loudness and frequency masking; critical band. Audio coding:Fundamental of data compression: lossy and lossless compression, Huffman and arithmetic coding, model-based predictive coding, time- and frequency-domain approaches.Audio coding formats: WAV, AU, RA; coding formats for CD; Digital Audio Broadcast (DAB). Waveform coding: PCM, Delta Modulation, ADPCM, Dolby DTS. Pyschoacoustic coding: Transform coding, QMF and MDCT, MPEG I, II, IV Audio, Advanced audio coding and MP3. Lossless coding: Meridean Lossless Packing coding for DVD-Audio, Direct Stream Digital for Sony/Philips Super Audio CD. Music synthesisMusical acoustic; Time- and frequency-domain representation of sound; sinusoidal and harmonic signal; additive synthesis and non-linear synthesis; FM synthesis and Chebyshev techniques; physical modelling; wavetable synthesis; MIDI format; instrument and sequencing. Sound effects and audio production: Concert hall, studio and home listening room acoustics; absorption, reverberation time and Sabin calculations; room design for good acoustics; Sound effects: reverberation, depth perception, Sound localization/spatialization, Surround sound; Compression and expansion; Digital mixing; filtering; Dolby ProLogic; THX; Dynamic EQ; Common DSP techniques for audio processing. Multimedia applications: Internet audio broadcast; music jukebox. |
- editing-lecturer: Jeremiah Onunga