Copyright © Antonio D'Angelo, Univ. of Udine
Multimedia LecturesSummary |
Week |
Date |
Topic |
Slides |
1 |
2 Marzo |
What is Multimedia; General Definition; HyperText and HyperMedia; Multimedia Applications; Multimedia System; Multimedia Components and Data |
|
2 |
9 Marzo |
Waveforms; Amplitude, Frequency and Phase; Decibel Scales; Signal to Noise ratio; Signal Flow Graphs; Digital Signal Filtering; Finite Impulse Response |
|
3 |
16 Marzo |
Frequency components of an image; Frequency Domain; Fourier Theory; 1D and 2D Fourier Transforms; Magnitude and Phase Spectrums; Time-Frequency Representation; Ideal Low-Pass Filter |
|
4 |
23 Marzo |
Low Pass Filters: ideal, Butterworth; Filtering Noisy Images; 2D Filtering; Examples; High Pass and Band-Pass Filters; Convolution; Fourier Transform and Convolution |
|
5 |
30 Marzo |
Discrete v Continuous Media; Static and Continuous Media; Analog and Digital Signals; Analog/Digital Converter; Text and Static Data; Graphics; Images; Audio and Video; Digitising Sound; Digital Sampling; Nyquist’s Sampling Theorem |
|
6 |
6 Aprile |
Implications of Sample Rate and Bit Size; Sampling Theory; Implications of Nyquist Common Digital Audio Formats; MIDI as a Compression Tool; Definition of MIDI; Components of a MIDI System; Basic MIDI Concepts; Hardware Aspects of MIDI; MIDI Messages; MIDI Channels; MPEG 4 Structured Audio; MPEG4 MIDI Semantics and Control; HTML 5 and MIDI |
|
7 |
13 Aprile |
Graphic/Image File Formats; BitMap Images; Gray Scale Images; Dithering; 24-bit and 8-bit Color; Graphic Formats: GIF, JPEG, TIFF, PNG, EPS; RGB Colour Space; Colour Model |
|
|
|
Trasformata di Fourier; Definizione diTrasformata di Fourier; Segnale di Durata Limitata; Spettro; Enfatizzazione |
|
8 |
20 Aprile |
CMY Color Model; Color Video Signals; Chrominance, Luma and Luminance; Gamma Correction, Color Vision; Light Photoreceptors and Cone Sensitivity; Color Properties; NTSC Video Color; Chroma Subsampling; Aliasing and Images and Videos; Temporal Aliasing |
|
|
Campionamento e Modelli del Colore |
9 |
27 Aprile |
Need for Compression; Basics of Information Theory; Shannon and Kolmogorov; Lossless and Loss Compression; Lossless Compression Algorithms: Repetitive Sequence Suppression, Run Length Encoding, Pattern Substitution, Entropy Encoding; Shannon-Fano Algorithm; Huffman Coding; Arithmetic Coding |
|
|
|
Codifica Huffman e Visione Oculare |
|
10 |
11 Maggio |
Simple Arithmetic Coding Example; Decoding; Binary Arithmetic Coding; Code generation; Arithmetic Coding; Lempel-Ziv-Welch Algorithm: Compression and Decompression; Source Coding Techniques: Transform and Differential Coding; Frequency Domain; Vector Quantization; K-Means |
|
|
|
Tecniche di Compressione e Tasso di Campionamento |
|
11 |
18 Maggio |
Moving into the Frequency Domain; The Discrete Cosine Transform: Relationship between DCT and FFT; 1D DCT; DCT Example; 2D DCT; Performing DCT Computations; Compression with DCT; Separability; 2D DCT on an Image Block; 2D DCT Basis Functions |
|
|
Compressione dei dati Multimediali e Codifica Aritmetica |
12 |
25 Maggio |
Basic JPEG Compression Pipeline; Major Coding Algorithms; Quantisation; Zig-zag Scan; Differential Pulse Code Modulation and Run Length Encode; Huffman Coding; Artefacts and Gibb's Phenomenon |
|
|
Compressione JPEG/MPEG |