Zig zag coding in multimedia
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ISDN lines have data rates which are multiples of 64kbit/s. It is designed in 1990 for transmission over ISDN lines primarily for video conferences and video telephony. Filters study using MATLAB.H.261 is a video codec which belongs to the H.26x family of video coding standards in the domain of the ITU-T Video Coding Experts Group (VCEG). Application to music compression (masking effects). Applicatin to compression of images, DPCM compression (applied to DC coefficient of 2D DCT), quadtree compression. Filterbanks: 2D Discrete Cosine Transform. Mark S DrewĬonversion among interlaced 4:2:0 and 4:2:2 (field dependent processing). Conversion among QCIF, CIF and 4CIF formats. Examples for interpolation/decimation applied to images and video. Sample rate converters (SRC): synchronous asynchronous with stored coefficients (polyphase, two branch polyphase with linear refinement) and computed coefficients (Farrow, modified Farrow). Examples for 1:2, 1:3, 2:1 and 3:1 up/downsamplers. Interpolation by zero insertion and filtering.įiltering and decimation. Filter design: sampled cardinal sinus as lowpass prototype. Quadrature mirror filters.Įxamples: moving averages and comb filters with zero / unit coefficients. Frequency response, phase and group delay. Symmetric coefficients (linear phase) and symmetric frequency response (half-band).
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3 Filters, Up/Down/Re-sampling Frequency domain processing. Examples of noisy, blurred, blocketized images.Įnhancement filters: lowpass filters, median filters. Quality, objective assessment (PSNR, peak signal to noise ratio). Frequency modulation of audio stereo - dual channel audio. Quadrature amplitude modulation of color, luma/chroma separation. Spatial/temporal sampling, interlaced video. Format ratio: 4:3, 16:9 or wide-screen, Temporal sampling to get smooth motion (24 Hz), to display (50-60 Hz), to avoid large-area flicker (100-120 Hz). Spatial sampling of Red/Green/Blue, color spaces (YCbCr), under-sampling of luma/chroma (4:2:2 and 4:2:0 formats). Non uniform / non-linear quantization, gamma correction. Quantizers with uniform step with/without dead-band, dithering, delta-sigma and noise-shaping. Reconstruction by cardinal sinus, zero order hold, filters to reject armonics. 2 Sampling and Quantization Sampling theorem, filters to reject interferents and avoid aliasing. Examples for compression of video: JPEG, MPEG-2, H.264, SVC and for audio: MP3, vocoder. From analog to digital signal representation, compression issues, transmission issues.Įxamples for transmission: Multiple Description, Adaptive Playout.
Zig zag coding in multimedia no cd#
Gothic 2 night of the raven 27 no cd crack. MultiMedia Coding (UniMI) The course started in 2007. Fundamentals of Multimedia, Chapter 9 Entropy Coding. Coding Tables Tables YIQ or YUV Zag Zig 8 (8 f. 9.4 Bi-level Image Compression Standards.
Zig zag coding in multimedia code#
Code blocks after zig-zag coding are created. Digital Image Representation Image Compression.
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