13_CM0340_Summary

13_CM0340_Summary - greyscale, true-colour Compression:...

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573 JJ II J I Back Close Summary What we have learned in this module? Different multimedia data and their representations Audio Image/Graphics Video Colour model and perception Different colour models (benefits and applications): RGB, CMYK, YUV, YIQ, L*a*b*. .. Chroma subsampling (why and how)
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574 JJ II J I Back Close Fundamental Tools Nyquist theorem Fourier Transform and Discrete Cosine Transform: Frequency Analysis Information theory and basic compression techniques: Run-length encoding Entropy encoding (Shannn-Fano, Huffman, arithmetic) LZW Predictive/Differential encoding Frequency Domain Compression Vector Quantisation
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575 JJ II J I Back Close Audio Processing: Digital Audio Effects [CM0268] Synthesis: Additive, Subtractive, FM, Wavetable, Sample-based, Granular, Physical Compression: Traits of human hearing system MPEG Audio, Dolby AC Representation: MIDI, MPEG-4 Structured Audio
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576 JJ II J I Back Close Image Representations: monochrome (dithering), index (LUT),
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Unformatted text preview: greyscale, true-colour Compression: What to exploit? JPEG: true colour GIF: index 577 JJ II J I Back Close Video Compression: What to exploit? Motion Compensation based Prediction (H.261) Bidirectional (B) frames (MPEG-1/2) Object-based coding, synthetic objects (MPEG-4) Various technical improvements: exible macroblock partition, subpixel motion estimation, multiple references etc. (MPEG-4 AVC) 578 JJ II J I Back Close Beyond the Material Problem-solving skills, e.g. the development of various methods for video compression Identify the challenge: what is the real problem? Learn the nature: what to exploit? Understand the practice: e.g. encoder / decoder balance Push forward: how can we do better? Last but not least, curiosity and enthusiasm!...
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This note was uploaded on 01/26/2012 for the course CM 0340 taught by Professor Davidmarshall during the Fall '09 term at Cardiff University.

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13_CM0340_Summary - greyscale, true-colour Compression:...

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