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| Number | Title | Issue Date |
| 5204899 | Vector quantization method employing mirrored input vectors to search codebook A vector quantization me employs mirrored input vectors to increase the reproduction quality of transmitted vector quantized data. A codevector is selected from a vector quantization codebook for each possible orientation of an input vector. The codevecto... | 04/20/1993 |
| 5182642 | Apparatus and method for the compression and transmission of multiformat data Video data is compressed, at a first site, by a transform scaling data compressor (12), and carrier signals are modulated with audio and digital data by a delta modulation data modulator (14) and a delta-sigma modulation data modulator (16) respectively. ... | 01/26/1993 |
| 5179442 | Method and apparatus for digitally processing a high definition television augmentation signal A method and apparatus for digital encoding are described for compressing the augmentation channel signals (chrominance and luminance signals for panel information and high frequency luminance and line difference signal) so that this information can be tr... | 01/12/1993 |
| 5173773 | Moving picture signal progressive coding system A progressive coding system wherein a moving picture signal is separated into a low frequency component of a little luminance variation and a high frequency component of much luminance variation, and the components are respectively coded by motion compens... | 12/22/1992 |
| 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 |
| 5072295 | Adaptive quantization coder/decoder with limiter circuitry An adaptive quantization coder/decoder having a limiter in a quantization coding module so that a reconstruction value of a quantization level is not in excess of a predetermined allowable range, or providing a limiter in a local quantization decoding mod... | 12/10/1991 |
| 5063608 | Adaptive zonal coder The invention provides a method and apparatus for performing image data compression. Initially, a two-dimensional block of image data in a spatial domain is transformed by a transform coder, resulting in a two-dimensional array of activity coefficients in... | 11/05/1991 |
| 5045925 | Apparatus for achieving compression encoding on components of image signal An image signal compression encoding apparatus achieving a two-dimensional orthogonal transformation encoding includes encoders to encode dc and ac components. For the encoders, each time the luminance signal Y, the color difference signal R-Y, or the col... | 09/03/1991 |
| 5043808 | High definition television arrangement employing motion compensated prediction error signals A high definition television system that is characterized by low transmission bandwidth is achieved by in a manner removing much of the redundancies in the signal, efficiently encoding the remaining signals, and transmitting the encoded signal in a manner... | 08/27/1991 |
| 5032927 | Image signal recording apparatus capable of recording compressed image data together with audio data An image signal recording apparatus achieves an orthogonal transform and a compression coding on image data so as to record the resultant data in a recoding medium. There is disposed a selector to select a compression ratio for the compression coding of t... | 07/16/1991 |
| 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 |
| 4979038 | Variable threshold quantification process in encoding by transformation for the transmission of image signals The invention relates to a quantization process in an encoding by transformation for transmission on a low rate link of an image signal, said image signal being processed in the form of blocks, each containing a set of digital data, each block being trans... | 12/18/1990 |
| 4974078 | Digital compression method and system with improved coding efficiency In a method for creating a scan sequence for a single chip color camera an analysis of typical images, captured through a color filter array, is performed to determine an optimal scan sequence for the particular array and/or the typical images. The images... | 11/27/1990 |
| 4953018 | Television Transmission system using transmission of basic picture weighting factors In a television transmission system for digital picture signals each picture is partitioned into sub-pictures of N1 ×N2 pixels for limiting the bit rate. Each sub-picture is subjected to a forward picture transform for generating ba... | 08/28/1990 |
| 4939515 | Digital signal encoding and decoding apparatus Digital data is conveyed along with the analog signal by selectively quantizing the analog signal in response to the level of each of the digital bits to be sent. By determining which quantization function was used, a decoder may recover the embedded digi... | 07/03/1990 |
| 4931869 | Method and circuit arrangement for reducing the data rate of digitized images For reducing the data rate of digitized images, image data are first transformed block by block, subsequently coded and finally temporarily stored in a buffer memory before they are output. Each data block is assigned on the basis of its own image statist... | 06/05/1990 |
| 4924311 | Dual-mode teleconferencing system In a teleconferencing system, a video encoder at the transmit end of the system includes a frame memory for storing video samples of a frame of a motion-picture signal and reading video samples at frame intervals. For still-picture transmission, an encode... | 05/08/1990 |
| 4887157 | Method and apparatus for improving the resolution of digital signals A method and apparatus for the improvement of the resolution of digital signals. In digital TV signals which are transformed into a selected frequency range, irregularities in the pattern of the reproduced video signals occur because of rounding off error... | 12/12/1989 |
| 4862263 | Arrangement for optimized weighting of transmitted transformation coefficients in transforamtion coders for the purpose of minnimizing convolution distortions An arrangement for optimized weighting of transmitted transformation coefficients in transformation coders for the purpose of minimizing convolution distortions in the transformation coding of image signals for the purpose of a data reduction and/or for t... | 08/29/1989 |
| 4860097 | Transformation circuit A circuit for the transformation of digital video signals, which circuit includes components operative for effecting transformation of a digital video signal in the form of a matrix of signal elements in a sequence which processes the matrix signal elemen... | 08/22/1989 |
| 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 |
| 4827338 | Hybrid coding process by transformation for the transmission of picture signals Hybrid coding process by transformation for the transmission of images or pictures. The pictures are defined by a sequence of frames, each frame containing a set of matrix-organized blocks, each block containing a set of digital data organized in matrix f... | 05/02/1989 |
| 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 |
| 4758889 | Value correction method A method and circuitry for correcting discreet values transmitted in blocks. Circuitry performs at least one multiplication as of matrixes to obtain at least one product value having a plurality of digits, while limiting the number of digits. The correcti... | 07/19/1988 |
| 4751742 | Priority coding of transform coefficients Disclosed are methods and apparatus for prioritization of transform domain coefficient data representing sources such as, but not limited to, single images and images in motion, so as to produce a data rate not exceeding the capacity of the transmission c... | 06/14/1988 |
| 4633296 | Omission and subsequent estimation of zero sequency coefficients of transformed digitized images to facilitate data compression A method of transmission or storage of a television picture involves dividing it into a plurality of blocks, subjecting them individually to a two-dimensional unitary transformation, transmitting or storing the transform coefficients and reconstructing th... | 12/30/1986 |
| 4567518 | System for decoding and displaying encoded television pictures An error protection code which acts on subpictures for the transmission of television picture information. First the picture is subpicture-wise transformed (124) by means of transformation functions, for example, Hadamard functions. Of the coefficients th... | 01/28/1986 |
| 4555729 | System for transmitting television picture information using an error-protection code An error protection code which acts on subpictures together constituting a television picture for the transmission of data for reconstructing the television picture at the receiving end. First each subpicture transformed by, Hadamard functions. Of the coe... | 11/26/1985 |
| 4549212 | Image processing method using a collapsed Walsh-Hadamard transform An improved image processing method uses a modified Walsh-Hadamard transform to remove noise and preserve image structure in a sampled image. Image signals representative of the light value of elements of the image are grouped into signal arrays correspon... | 10/22/1985 |
| 4510578 | Signal encoder using orthogonal transform The invention provides an encoder for subjecting an input signal to the orthogonal transform for band compression and encoding. The encoder has a sample and hold circuit which samples the input signal at a sampling frequency three times that of the input ... | 04/09/1985 |
| 4463377 | Arrangement for storing or transmitting and for recovering picture signals In the conventional transformation coding of pictures the value ranges of the coefficients then produced are extended during the performance of the individual arithmetical steps. As a result thereof these coefficients have a great redundancy. According to... | 07/31/1984 |
| 4447886 | Triangle and pyramid signal transforms and apparatus Transform techniques for transforming numerical signal data into a transform domain and subsequent reconstruction, for purposes such as compression (bandwidth reduction) for communication or storage. The subject transforms involve several defined basis fu... | 05/08/1984 |
| 4442454 | Image processing method using a block overlap transformation procedure An image processing method is provided for reducing noise in a sampled image, particularly for reducing noise in an image divided into blocks of sampled image elements that are transformed by a linear procedure, such as the Walsh-Hadamard transform, and i... | 04/10/1984 |
| 4389673 | Hadamard transformer using charge transfer devices The Hadamard transformer comprises a charge transfer device having N rest electrodes preceded by N transfer electrodes, 2N reading electrodes, each rest electrode being positioned between a first reading electrode and a second reading electrode and 2N tra... | 06/21/1983 |
| 4293920 | Two-dimensional transform processor A processor capable of performing a two-dimensional transform on high speed serial sampled analog raster scanned data and outputing the results in a parallel fashion so as to provide for a data rate reduction. The processor utilizes a charge coupled devic... | 10/06/1981 |
| 4261043 | Coefficient extrapolator for the Haar, Walsh, and Hadamard domains In a data compression system utilizing the Haar, Walsh or Hadamard transformation, a machine which operates in the transform domain to obtain approximations to the higher order transform coefficients by means of extrapolation from lower order transform co... | 04/07/1981 |
| 4245330 | Elastic surface wave Hadamard transformer An elastic surface wave transformer comprises a receiver transducer and an emitter transducers on a substrate capable of transmitting elastic surface waves. The transformer comprises a single track and the emitter transducers are arranged behind one anoth... | 01/13/1981 |
| 4242734 | Image corner detector using Haar coefficients A machine for detecting image corners in two-dimensional images. The machine transforms two-dimensional images by means of the Haar transform into the two-dimensional Haar transform domain. Certain of the Haar transform coefficients, which are sensitive t... | 12/30/1980 |
| 4224678 | Method and apparatus for implementing a processor based on the rationalized Haar transform for the purpose of real time compression of video data A method and apparatus is described for implementing a real time video processing system based on the rationalized Haar transform. The system operates in real time to remove redundant information from video data for the purpose of compressing the video ba... | 09/23/1980 |
| 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 |
