Abstract: Method and apparatus for a multi-application, laser-array-based image system utilizes three linear laser arrays. Each linear array generates multiple (N>1) parallel output beamlets at one of the three primary colors (red, green, blue). The corresponding 1 to N output beamlets of the three linear arrays, each individually modulated in luminance according to a specific encoding scheme representing the video image to be produced on the viewing screen, are combined spatially to form a single white light linear array source. Through a projection/scanner optical system, the N output beamlets of the white light source are simultaneously directed to, and swept horizontally across a distant viewing screen, resulting in a swath of N lines of a graphic video image. By producing M contiguous swaths vertically down the viewing screen, a full image of M.times.N lines is produced.

Abstract: Filtering apparatus responsive to a sequence of samples of an input signal that is digitally-sampled at a given frequency, wherein the input signal defines information having at least one dimension. The apparatus includes first resampler for resampling the input-signal to derive a first signal at a first frequency which is substantially equal to the reciprocal 1/C of a given factor C times the given frequency, and second resampler for resampling the first signal to derive a second signal at a second frequency which is substantially equal to the given factor C times the first frequency. The given factor C is an improper fraction having a least-common-denominator larger than one. This filtering apparatus is particularly suitable for variably spatially low-pass, high-pass, band-pass or hierarchical-pyramid filtering two-dimensional image information in each of its two-dimensions by amounts which are independent of one another.

Abstract: A digital resampler comprises a combination of first means and second means. The first means, which includes interpolation filter means, is responsive to the digital-signal sample values of an input sample stream for producing a first derived sample stream of digital-signal sample values in which the given sampling period P of the input stream is multiplied directly by a factor equal to M'/CL, where C is a given positive integer and M' is smaller than CL, either 2.sup.n (M'/CL) or 2.sup.-n (M'/CL) is equal to M/L and the absolute value of n is at least equal to zero, so that the sampling period of the first derived sample stream is (M'/CL)P. The second means, which includes octave prefiltering and sample means, is responsive to the first derived sample stream of digital-signal sample values for producing as an output a second derived sample stream of digital-signal sample values in which the first derived sampling period (M'/CL)P of the first derived sample stream is multiplied by a factor equal to either 2.

Abstract: An image signal processing system DPCM encodes the signal, then Huffman and run length encodes the signal to produce variable length code words, which are then tightly packed without gaps for efficient transmission without loss of any data. The tightly packing apparatus has a barrel shifter with its shift modulus controlled by an accumulator receiving code word length information. An OR gate is connected to the shifter, while a register is connected to the gate. Apparatus for processing a tightly packed and decorrelated digital signal has a barrel shifter and accumulator for unpacking, a Huffman and run length decoder, and an inverse DCPM decoder.

Abstract: By staggering the phases of the decimations of the subbands in a quadrature mirror filter bank odd-tap kernels may be usefully employed.

Abstract: A display processor using first and second chrominance map memories for storing values of first and second color-difference signals, each normalized respective to luminance signal. An image memory supplies, at pixel scan rate, data used to provide read-addresses to said first and second chrominance map memories and data used to describe the luminance signal. The first and second chrominance map memory read-outs are each multiplied by the luminance signal of appropriate spatial bandwidth to generate descriptions of the first and second color-difference signals i non-normalized form. These first and second color-difference signals and a full-spatial-bandwidth luminance signal are supplied to color matrixing circuitry. The color matrixing circuitry responds to these signals to provide red, green and blue drive signals to display apparatus. The display apparatus may comprise video amplifiers for the drive signals and a color kinescope, by way of example.

Abstract: The amount of hardware required to implement a Burt Pyramid or an FSD (filter-subtract-decimate) pyramid analyzer (or synthesizer) stage of a sampled temporal signal representing an n-dimensional information component or (such as a video signal) is substantially reduced by employing a time-synchronized multiplexed analyzer stage to derive (or a time-synchronized multiplexed synthesizer stage that is responsive to) a single serial stream of samples of a predetermined plural number of sub-spectra that are arranged in a predetermined temporal order format with respect to one another in accordance with each of a given set of time synchronized, repetitively generated, serially applied control signals.

Abstract: The number of bits per digital sample that is required to be stored in each of one or more delay means of an input-weighted multitap digital filter is reduced with respect to that required by the prior art. The savings in storage hardware becomes more and more significant as the number of samples stored in each delay means becomes larger and larger. A plurality of filter delay means, each storing as many as 800 samples, are used in vertical filters of image processors operating in real time on horizontally scanned two-dimensional images, such as television images.

Abstract: Pipe-line architecture is employed for analyzing in delayed real time the frequency spectrum of an information component (having one or more dimensions) of a given temporal signal having a highest frequency of interest of no greater than f.sub.0, and/or for synthesizing in delayed real time such a temporal signal from the analyzed frequency spectrum thereof. Such pipe-line architecture is particularly suitable for image-processing the two-dimensional spatial frequencies of television images defined by a temporal video signal.

Abstract: Reduction of storage capacity required by one dimensional digital filter/decimator and/or expander/interpolation filter for spatially filtering that given dimension of a scanned two-dimensional image, represented by a temporal video signal, which is orthogonal to raster scan lines. Such filter devices are particularly suitable for use in Burt Pyramid image processing systems.