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By John G. Webster (Editor)

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Thus, in addition to exploiting the spatial redundancy in individual video frames (as in still images), it is important for a good video-coding algorithm to exploit the much more significant temporal redundancy across frames. In state-of-the-art video coders, this is done by what is termed motion-compensated prediction. The basic idea is simple. , when these represent 1/30 intervals), with high likelihood one can predict the next frame based on the previous or the future frame. Aiding in this prediction, it is necessary to model the motion of areas of the picture.

Also for a review of another class of image detectors called CMOS detectors under investigation at many laboratories, see Refs. 34 and 35. Storage Density Limits Fourier Transform Recording. Fourier transform recording is a simple method of minimizing the spatial extent of a 2D data pattern. The most common geometry employs an f-f-f-f configuration as shown in Fig. 11. Consider a square spatial light modulator SLM with N SLM × N SLM pixels of pitch p × p placed at the front focal plane of the Fourier transform lens with F-number F.

5, Eλ = 2ev, N SLM = 512, OS = 4, and p = 2. Several observations can be drawn from Fig. 17: (1) As we start at a low value of νread /PR , the first term related to media noise in the numerator of Eq. (46) is much larger than the second term, which is tied with the CCD noise, and η is essentially independent of 20 HOLOGRAPHIC STORAGE Fig. 18. 1, R = S = 35◦ . n = 10 − 3 , λ = 500 nm, νread /PR . Then the CCD noise starts to become competitive with the media noise leading to higher values of η as νread /PR increases.

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