By Professor Jens-Rainer Ohm (auth.)

ISBN-10: 3642187501

ISBN-13: 9783642187506

ISBN-10: 3642622771

ISBN-13: 9783642622779

Excellent textbook of multimedia sign processing additionally facing the optimization of multimedia verbal exchange structures. It covers the theoretical heritage of 1- and multidimensional sign processing, statistical research and modeling, coding and data concept in addition to estimation and type idea. various sensible examples are given for algorithms and layout of multimedia sign compression and transmission platforms, for structures acting content material research and indexing of multimedia indications. ideas in the back of multimedia coding and indexing criteria, e.g. MPEG-1/-2/-4/-7 are defined intimately, together with the latest advancements just like the new complex Video Coding average and Motion-Compensated Interframe Wavelet Coding. a variety of figures and examples illustrate the thoughts. because the publication is predicated on a graduate-level collage direction, such a lot chapters are supplemented by means of workouts. The e-book is additionally a self-contained advent either for researchers and builders of multimedia verbal exchange structures in industries.

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**Additional resources for Multimedia Communication Technology: Representation, Transmission and Identification of Multimedia Signals**

**Sample text**

C) What is the ratio of the horizontal sampling distance R in Fig. 12c, as compared to the rectangular sampling case with R=8 ? d) Compute the determinant of the sampling matrix D he:n normalized by 8=1. Compare the value against the results from parts b) and c). e) The CCD chip ofa digital camera has an active area of 10 mm x 7,5 mm. 000,000. Compute the approximate vertical sampling distances 8 for the cases of rectangular sampling (R=S) and hexagonal sampling . 3 A two-dimensional cosine of horizontal frequency OJ,=OJs/3 is sampled by a quincunx grid (see Figs.

Interpretation of a two-dimensional sinusoid : Linear phase shift depending on vertical position results in vertical wavelength and frequency 26 2 Signals and Sampling If the dependency on the vertical position is linear, ¢J(s) = OJ2s . Then, for any s = k~ (k an arbitrary integer number), ¢J(s) =21rk . e. vertical periodicity. Thus, the 2dimensional sinusoid can be interpreted as a l-dimensional sinusoid having a linear phase shift depending on the second dimension. This is illustrated in Fig.

18. 5 In a variant of interlaced video sampling, the fields shall not be established by rectangular grids, but by quincunx grids (see Fig. 18). 48 a) b) c) 2 Signals and Sampling Determine a sampling matrix D. Compute the related frequency sampling matrix F. Which is the shape of the base band in the 3D frequency domain? 6 A 2D signal shall be sampled by the grid shown in Fig. 19, where the black and white dots establish two rectangular sub-grids of equal sampling distances. The black grid is shifted horizontally and vertically by R' and S' relative to the white grid.

### Multimedia Communication Technology: Representation, Transmission and Identification of Multimedia Signals by Professor Jens-Rainer Ohm (auth.)

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