Abstract: Disclosed is a multiperspective backprojection system for autostereoscopically displaying three-dimensional representations. Said backprojection system comprises a backprojection screen (2) and an image generation unit (1) which is disposed behind the backprojection screen (2) and is provided with a projector (7a to 7p) for each perspective of the three-dimensional representations. The rear face (3) of the backprojection screen (2) is fitted with a first lenticular screen plate (8) while the front face (4) thereof is equipped with a second lenticular screen plate (9). The inventive backprojection screen (2) encompasses a third lenticular screen plate (10) between the first lenticular screen plate (8) and the second lenticular screen plate (9). The three lenticular screen plates (8, 9, 10) are provided with parallel cylindrical lenses.

Abstract: What is described is a position-adaptive autostereoscopic 3-D reproduction system for generating 3-D images or scenes, having a flat image screen (1) with colour subpixels (R, G, B) lying side by side, a raster screen (2), a coding unit (6, 9) and a processor unit (3) for generating perspective images. According to the invention, the coding unit (6, 9) is controllable and the raster screen (2) is dimensioned and arranged such that first and second mutually interlaced subpixel strips appear on the image screen (1) and from these, first and second image strips are generated, which appear to the two eyes of an observer to be disjoint for a defined viewing region in front of the image screen (1), whereby a constant sequence of colours of the subpixels is maintained in the first (second) subpixel strips.

Abstract: Disclosed is a multiperspective backprojection system for autostereoscopically displaying three-dimensional representations. Said backprojection system comprises a backprojection screen (2) and an image generation unit (1) which is disposed behind the backprojection screen (2) and is provided with a projector (7a to 7p) for each perspective of the three-dimensional representations. The rear face (3) of the backprojection screen (2) is fitted with a first lenticular screen plate (8) while the front face (4) thereof is equipped with a second lenticular screen plate (9). The inventive backprojection screen (2) encompasses a third lenticular screen plate (10) between the first lenticular screen plate (8) and the second lenticular screen plate (9). The three lenticular screen plates (8, 9, 10) are provided with parallel cylindrical lenses.

Abstract: What is described is a position-adaptive autostereoscopic 3-D reproduction system for generating 3-D images or scenes, having a flat image screen (1) with colour subpixels (R, G, B) lying side by side, a raster screen (2), a coding unit (6, 9) and a processor unit (3) for generating perspective images. According to the invention, the coding unit (6, 9) is controllable and the raster screen (2) is dimensioned and arranged such that first and second mutually interlaced subpixel strips appear on the image screen (1) and from these, first and second image strips are generated, which appear to the two eyes of an observer to be disjoint for a defined viewing region in front of the image screen (1), whereby a constant sequence of colours of the subpixels is maintained in the first (second) subpixel strips.

Abstract: Position-adaptive autostereoscopic monitor (PAM) has an image screen having a plurality of color sub-pixels of three-different colors, located horizontally one beside the other in a same given sequential order for defining image pixels, and a means such as lenticular prism grids and barrier stripe grids, being positioned in front of the image screen, wherein right and left image pixels are position-adaptively generated such that an area only being visible from a direction of a right eye of a viewer, an area only being visible from a left eye of a viewer, empty areas which are not visible at all from both eyes and interference areas which are at the same time visible from a direction of the right eye as well as from a direction of the left eye are obtained and that those neighbored ones of the sub-pixels are set dark which are located in the interference areas and the empty areas, and wherein the image pixels within each of the areas being visible from the directions of the right and left eye are chosen such t

Abstract: A high resolution 3D color display, particularly suited to natural three-dimensional representation in computer tomography, is diclosed. In a digital autostereoscopic display, over eighty related or desired perspective views of an object may be represented in 3D, written onto a digital display by lasers in a few minutes, and subsequently deleted. The displays are digitally stored in minute fields of a thin LC layer of a scatter screen and converted into high resolution color pictures by reverse irradiation view color and brightness masks. The individual perspectives may be viewed selectively by a lenticular screen plate. The same displays may also be stored in the same code on a film which, when used in place of the scatter screen, shows the display to a user. The display can therefore be used in modified form to produce display photos when graphic computers are used.

Abstract: Stereoscopic perspectives changing with the position of the observer's eyes create a natural depth-impression. An electronically controlled adaptive monitor is disclosed that imitates this feature without any additional devices such as glasses, so that items in front and behind the screen appear in a three-dimensional manner. Alternatively, the monitor can also be used as a high-resolution two-dimensional screen. This combined performance feature is achieved at a reasonable price by mounting a grid-shield with vertical cylinder lenses in front of the monitor. At the focal point of the cylinder lenses is an electronically controlled shadow-line grid-LCD, allowing the alternating passage of right and left pictures sequentially at 100 or 120 Hz. Depending on the position of the observer, the location of the shadow-lines is changed adaptively, while the respective right- and left-eye perspectives of the 3D-picture can be calculated in real-time simultaneously.

Abstract: To convert an input-word sequence into a digital line code of half the bit rate of the input-word sequence, particularly for digital color television signal transmission, an encoder is disclosed which has a difference branch in which the difference (D.sub.i) between every two successive input words (X.sub.i-1, X.sub.i) is converted into a difference code word (D.sub.i) by adaptive PCM quantization, and a sum branch in which the sum (S.sub.i) of the same successive input words (X.sub.i-1, X.sub.i) is converted into a difference code word (S.sub.i +P.sub.i) in a hybrid DPCM encoder. These two words are combined into a line code word (C.sub.i) by an adder (9). The quantizing characteristic of the adaptive PCM quantizer (1) is selected as a function of the prediction error present within the hybrid DPCM encoder (2). The decoder at the receiver of the novel communication system splits up the received line code word (C.sub.i) into the difference code word (D.sub.i) and the sum code word (S.sub.i +P.sub.

Abstract: When television signals are transmitted digitally over PCM networks, it is sometimes necessary to reduce the bit rate of video signals, such as chrominance signals, on the transmission path from the rate given by the sampling frequency without significantly impairing the picture quality. To accomplish this, the transmitting portion of the novel transmission system includes a transmit filter (FIG. 2) which, at every other sample value in the horizontal and vertical directions of the picture, transmits a numerical value (C) which has the same number of bits as the sample values and depends on this sample value and the sample values of surrounding picture elements, and the receiving portion includes a receive filter (FIG. 3) in which the values of the picture elements to be inserted between the transmitted picture-element values are calculated from the values received for the surrounding picture elements.