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| Number | Title | Issue Date |
| 5508747 | Frame format conversion device for converting image signal frame through frame interpolation A device for converting image signal frame format including a motion compensator for restoring image signals by carrying out motion compensations employing motion information, variable length decoding, inverse multiplex conversion, displaced frame differe... | 04/16/1996 |
| 5495292 | Inter-frame wavelet transform coder for color video compression A video coding scheme based on wavelet representation performs motion compensation in the wavelet domain rather than spatial domain. This inter-frame wavelet transform coding scheme preferably uses a variable-size multi-resolution motion compensation (MRM... | 02/27/1996 |
| 5491685 | System and method of digital compression and decompression using scaled quantization of variable-sized packets A system and method of compressing and decompressing a digital signal using scaled quantization of variable-sized packets of difference samples. Difference samples are generated and subdivided into packets. Packet boundaries may be moved to maximize resol... | 02/13/1996 |
| 5485279 | Methods and systems for encoding and decoding picture signals and related picture-signal records Reproducing an input image of reduced resolution with respect to the vertical and horizontal directions in high picture quality by processing a coded bit stream of normal resolution. A difference signal (mismatching error signal) representing the differen... | 01/16/1996 |
| 5471247 | Electronic picture reproduction device In a method of reproducing a television picture composed of picture points represented by digital signals, the picture points are grouped into blocks which are separated by block edges. The blocks are one of at least two types of blocks, picture point val... | 11/28/1995 |
| 5469228 | Memory address and display control apparatus for high definition television A memory address and display control apparatus for an high definition television comprising a memory address controller for controlling memory read/write addresses in response to a motion vector and a control signal, the memory address controller having a... | 11/21/1995 |
| 5467110 | Population attribute compression An image population having a large number of attributes is processed to form a display population with a predetermined smaller number of attributes that represent the larger number of attributes. In a particular application, the color values in an image a... | 11/14/1995 |
| 5457481 | Memory system for use in a moving image decoding processor employing motion compensation technique A memory apparatus for use in a receiver for decoding video signals comprises a first memory for storing an image frame; a second memory for storing current pixel data temporally and providing the same to said first memory; an address generator for genera... | 10/10/1995 |
| 5434622 | Image signal encoding apparatus using adaptive frame/field format compression Compression of blocks of digital data is optimized by optimally selecting between frame and field format compression on a block-by-block basis. Specifically, a set of pixel data presented in a field format is compressed to provide a field compressed image... | 07/18/1995 |
| 5432555 | Image signal encoding apparatus using adaptive 1D/2D DCT compression technique An improved image signal encoding apparatus for processing a digitized image signal for transmission thereof in a compressed form, comprising a horizontal one-dimensional compression path for compressing the digitized image signal utilizing a horizontal c... | 07/11/1995 |
| 5422675 | Adaptive modulation/demodulation signal processing Method and apparatus for channel noise reduction. This method uses adaptive modulation/demodulation for noise reduction. The modulation factor does not require a large amount of data to be represented. Representation is based upon a frequency-domain funct... | 06/06/1995 |
| 5422676 | System for coding an image representative signal A hybrid Discrete Cosine Transform (DCT) coder processes blocks of (e.g., 8×8) pixels from interlaced or progressive scanned image signals. Processing of image lines by the coder is modified in the presence of image motion to avoid switching between 8×8... | 06/06/1995 |
| 5402185 | Television system for transmitting digitized television pictures from a transmitter to a receiver where different transform coding techniques are selected on the determination of motion A motion detector, particularly for use in a television system for transmitting television pictures in a digital form, is adapted to partition each picture into pixel blocks, to subject each pixel block to a modified intraframe transform for determining a... | 03/28/1995 |
| 5400075 | Adaptive variable length encoder/decoder A variable length encoding/decoding system for use with a layered signal format, and for adaptively providing VLC changes without additional signal overhead, includes a plurality of VLC encoding tables, respective ones of the tables being preprogrammed wi... | 03/21/1995 |
| 5394189 | Motion picture coder and system for controlling the same A motion picture coder for coding plural macro blocks of motion picture data based on a standardizing system is disclosed. The coder comprises first and second pipe-lined processors executing different coding processes respectively, both of which are sepa... | 02/28/1995 |
| 5387937 | Motion compensation for color video signals A motion compensation technique for color video signals involves deriving at least one principal component from the video signals by means of a hotelling transform circuit and a matrix, and applying motion compensation to an interpolator (or to a compress... | 02/07/1995 |
| 5386241 | Signal transformation system and method for providing picture-in-picture in high definition television receivers The present invention relates to a novel method and system for providing high definition television receivers with a picture-in-picture (PIP) feature through the use of a reduced number of transform coefficients. The system comprises first decoding unit f... | 01/31/1995 |
| 5357282 | Video decoder with parallel implementation An image decoder for discrete cosine transform and motion compensation which separately performs a process for inverse quantization and inverse discrete cosine transform in the unit of 8×8 block and a process for motion compensation in the unit of 16×16... | 10/18/1994 |
| 5355168 | High precision motion compensation apparatus A motion compensation apparatus for receiving information on motion vectors and for performing a motion compensation of dynamic image signals with a precision equal to or finer than one pixel. The information on motion vectors has been estimated from a re... | 10/11/1994 |
| 5351095 | Method and device for estimating and hierarchically coding the motion of sequences of images A method for estimating motion which calculates a priori for a current image a first field of motion for blocks of a first level resulting from a partition of the image into blocks of a so-called maximum size, on the basis of a symmetric estimation algori... | 09/27/1994 |
| 5282030 | Endoscopic image processor and endoscopic image processing method A group of vectors are set to transform each signal of an endoscopic image resolved into a plurality of color signals into a plurality of new color signals based on statistical characteristics of the image. Also, the color signals of the endoscopic image ... | 01/25/1994 |
| 5214504 | Moving video image estimation system A moving video image estimation system wherein based on an original video image of time n and time n+1, the centroid, the principal axix of inertia, the moment about the principal axis of inertia and the moment about the axis perpendicular to the principa... | 05/25/1993 |
| 5150209 | Hierarchical entropy coded lattice threshold quantization encoding method and apparatus for image and video compression A method and apparatus for encoding interframe error data in an image transmission system, and in particular in a motion compensated image transmission system for transmitting a sequence of image frames from a transmitter to a receiver, employ hierarchica... | 09/22/1992 |
| 5128754 | Apparatus and method for encoding and decoding video A method and an apparatus are disclosed for encoding and decoding video to achieve bandwidth compression. In one embodiment, frames of a video signal are divided into a multiplicity of tiles. The picture content of each tile is separated into a plurality ... | 07/07/1992 |
| 5006929 | Method for encoding and transmitting video signals as overall motion vectors and local motion vectors A redundancy reduction algorithm, such as hybrid DCT, is applied to a video signal and is subsequently encoded by pixel blocks, and motion vectors are generated for each image block. At least one global motion vector is then generated for the entire image... | 04/09/1991 |
| 5001561 | Embedded coding system for video signals A video processing system is disclosed that separates and separately encodes and decodes the low and high spatial frequency coefficients of images for transmission or storage. Each block of an image is transformed into the frequency domain. High frequency... | 03/19/1991 |
| 4982282 | Image signal compression encoding apparatus and image signal expansion reproducing apparatus A compression encoder uses an arbitrary normalization coefficient and a preset table to achieve a compression of image signal with a desired compression rate. Since the normalization coefficient and the table data are sent to an image signal decoding and ... | 01/01/1991 |
| 4924309 | Method and circuit arrangement for improving the resolution of the coefficients of digital signals, particularly digital TV signals A method and apparatus for the improvement of the resolution of digital signals. In digital TV signals which are transformed into a frequency domain, irregularities in the pattern of the reproduced video signals occur because of rounding off errors, when ... | 05/08/1990 |
| 4903128 | Method and device for the reduction of noise generated by a digital image encoder/decoder operating by blocks Disclosed is a method for the reduction of the noise generated during the encoding/decoding of digitized images operating by blocks. To reduce the faults visible in the restored image, the method consists in filtering the image by using a filtering window... | 02/20/1990 |
| 4849812 | Television system in which digitized picture signals subjected to a transform coding are transmitted from an encoding station to a decoding station Television system in which digitalized picture signals subjected to a transform coding are transmitted from an encoding station to a decoding station. In a television system a digital picture signal is subjected to a transform coding for the purpose of bi... | 07/18/1989 |
| 4829376 | Method for data reduction of digital video signals by vector quantization of coefficients acquired by orthonormal transformation with a symmetrical nearly, cyclical hadamard matrix A method for data reduction of digital video signals by vector quantization of coefficients acquired by orthonormal transformation with a symmetrical, nearly cyclical Hadamard matrix, employs formation of a mean value coefficient and a plurality of struct... | 05/09/1989 |
| 4807053 | Method and apparatus for recording and/or reproducing video information in/for a record carrier, and record carrier obtained by means of the method In a method of recording video information in a record carrier, each picture of N×M picture elements being divided into subpictures of n×m picture elements, the video information of each subpicture is encoded in accordance with a transform coding and re... | 02/21/1989 |
| 4807033 | Method for correcting television signals Method of correcting television signals transmitted in blocks, including detecting defective blocks with an error detection circuit and calculating substitute information for a block determined to be defective from an environment of the defective block or... | 02/21/1989 |
| 4797742 | Divisional image transmission system and method In an image transmitting system such that an image frame is divided into plural blocks and video signals are transformed block by block in accordance with an orthogonal transform method before coding and transmission of the transform coefficients, transfo... | 01/10/1989 |
| 4772946 | Method for data reduction of digital picture signals by vector quantization of coefficients acquired by orthonormal transformation by means of a symmetrical, nearly cyclical Hadamard matrix A method and apparatus for data reduction of digital picture signals by vector quantizing of coefficient acquired by orthonormal transformation using a symmetrically, nearly cyclical Hadamard matrix, includes means for deriving a mean value coefficient an... | 09/20/1988 |
| 4613894 | Method and device for detection of moving points in a television image for digital television systems providing bit-rate compression, with conditional-replenishment The method consists in computing a luminance and/or chrominance gradient indicator (Ig) at each point of the image, in computing a threshold value (S(Xo)) as a function of each gradient obtained, in measuring the inter-image luminanc... | 09/23/1986 |
| 4303912 | Digitally controlled composite color video display system This disclosure relates to a color video system that is adapted to receive digital codes representing values of different colors that are to be displayed to create an image on a standard video monitor. The system employs a video synthesizer which includes... | 12/01/1981 |
| 4189748 | Video bandwidth reduction system using a two-dimensional transformation, and an adaptive filter with error correction A reduction in bandwidth of two-dimensional video data is obtained by the two-dimensional transformation of the video data by means of one of a class of fast transformations followed by the elimination of certain non-significant transform coefficients pri... | 02/19/1980 |
