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6415060 Lossless transform coding system having compatibility with lossy coding  
A reversible eight-element DCT providing values near to transform values of the original DCT. In a 4×4 matrix, coefficients (X 1 , X 7 , X 3 , X 5 ) are separated into (X 1 , X 7 ) and (X 3 , X 5...
6393060 Video coding and decoding method and its apparatus  
An apparatus and method for video coding is disclosed wherein one frame is divided into a plurality of blocks. The present invention divides an input frame into a plurality of blocks and...
6393156 Enhanced transform compatibility for standardized data compression  
In an apparatus and method for image/video enhancement, pre-processing and post-processing techniques are employed to effectively modify the transforms used in a fixed, standardized data...
6388588 Encoding device and encoding method for changing code amount of compressed image data  
Compressed image data from a code memory is separated into quantization step values, code table information and variable-length codes. The variable-length codes are each decoded into a run length,...
6389169 Intelligent systems and methods for processing image data based upon anticipated regions of visual interest  
Systems and methods for performing intelligent image processing. Image processing systems and methods in accordance with the present invention may select algorithms for processing collections of...
6389171 Method and apparatus for a digital video cassette (DVC) decode system  
A system for decoding variable length coded DVC data and methods of operating the same result in a variable length decoder engine that receives video frames having a plurality of digital...
6377709 Process for coding with region information  
The process for the compression of digital data from a video image which carries out a partitioning ( 4 ) of the image into image blocks, a Discrete Cosine Transformation ( 9 ) of these blocks so...
6360016 Imagine predictive decoding apparatus  
There is disclosed image predictive coding apparatus and method, image predictive decoding apparatus and method, and recording medium which stores therein the image predictive coding method or the...
6356663 Processing image signals using spatial decomposition  
Image signals are encoded following a spatial decomposition pattern that is based on a selected location within the image. The resulting sequence of sets of encoded image signals may be transmitted...
6353685 Method and apparatus for image compression  
An image compression apparatus for compressing image data provided to an input terminal and providing compressed data to an output terminal includes a 4×4 weighted digital cosine transformer (DCT)...
6351568 Image transform and significance bit-plane compression and decompression  
A method of representing a digital image to provide a coded representation is disclosed. The digital image is divided into a number of blocks of pixels and each block is transformed to derive a...
6334001 Iterative smoothing technique for pre-processing mixed raster content planes to improve the quality of a decompressed image and increase document compression ratios  
A method and apparatus for compressing a mixed raster content image that represents a color or gray scale a document is disclosed. The pixel map is decomposed into a three-plane representation--a...
6295320 Inverse discrete cosine transforming system for digital television receiver  
An inverse discrete cosine transforming (IDCT) system for a digital television receiver performing a variable length decoding and an inverse quantization of an applied bit stream and an IDCT with...
6292589 Method for choosing rate control parameters in motion-compensated transform-based picture coding scheme using non-parametric technique  
A method of assigning quantization values for use during the compression of images is disclosed. The method includes constructing a non-parametric model during a training phase based on...
6275616 Method and apparatus for converting a high definition image to a relatively lower definition image using wavelet transforms  
A method and an apparatus for converting a high definition image to a relatively lower definition image is provided. Image data encoded with a discrete cosine transform (DCT) is decoded using an...
6259818 Contour approximation apparatus for representing a contour of an object  
A contour approximation apparatus for representing a contour image of an object comprises a polygonal approximation section for determining a number of vertices on the contour image and fitting the...
6259820 Progressive JPEG decoding  
This invention enables progressively higher resolution images of a JPEG compressed image to be produced in a cost effective manner during the JPEG decompression process. The operation count is very...
6252994 Adaptive quantization compatible with the JPEG baseline sequential mode  
Pixel blocks of an input image are type classified based on an analysis of pixel values for each respective pixel block. A discrete cosine transform (DCT) is performed on the pixel values of each...
6249609 Apparatus and method for processing images  
An image processing apparatus makes it possible to cut off a desired image with a high extraction rate irrespective of whether or not an inputted image has compression hysteresis. With the image...
6236762 System and method for unified DCT and wavelet data coding  
A unified system and method for encoding an array of data. If the data array is comprised of DCT data, then coefficients from corresponding positions in the data array are mapped into a common...
6236749 Image recognition method  
The method provides object recognition procedure and a neural network by using the discrete-cosine transform (DCT) (4) and histogram adaptive quantization (5). The method employs the DCT transform...
6233359 File size bounded JPEG transcoder (FSBJT)  
A technique that reduces the size of an existing JPEG file or set of DCT coefficients to satisfy a certain bit budget by setting to zero coefficients whose magnitude is below a certain threshold...
6222944 Down-sampling MPEG image decoder  
A method and apparatus for decoding, e.g., an MPEG-like video information stream comprising quantized discrete cosine transform (DCT) coefficients representing relatively high resolution image...
6215909 Method and system for improved digital video data processing using 4-point discrete cosine transforms  
Methods and systems for data compression and decompression are disclosed. Specifically, the method for data compression of the present invention receives four inputs representing pixel information...
6208754 Image compression and expansion device using pixel offset  
The image compression and expansion device handles red (R), green (G) and blue (B) image data, which are offset horizontally to each other by one-third of one pixel, for example. The R, G and B...
6208745 Method and apparatus for imbedding a watermark into a bitstream representation of a digital image sequence  
A method and apparatus that inserts watermark information directly into an encoded video bitstream. The method identifies specific blocks or macroblocks in an encoded video bitstieam and inserts...
6198849 Process for producing and evaluating a video data stream for video transmission  
A method for generating a stream of image data which is to be transmitted via a data channel, in particular a mobile radio channel. In this method, the images are divided into a quantity of...
6192075 Single-pass variable bit-rate control for digital video coding  
Integrated circuit provides single-pass, real-time digital image encoding by digital signal processor for variable bit rate (VBR) control to improve decoded output quality. Possible peak bit rate...
6181831 Spatial frequency-domain video signal processing  
A method of generating an output array of image spatial frequency coefficients from input arrays of image spatial frequency coefficients overlapped by the required array, the spatial frequency...
6173080 Prediction method for discrete cosine transform coefficient  
A discrete cosine transform (DCT) coefficient prediction method and a DCT coefficient encoding method are provided. For the prediction of AC coefficients, location information of the nonzero AC...
6167092 Method and device for variable complexity decoding of motion-compensated block-based compressed digital video  
A method and device compute the inverse discrete cosine transform (IDCT) in a block based motion compensated digital video decoder, such that the computational complexity is dependent on syntax...
6160919 Method for data compression  
The widely used JPEG standard algorithm for two-dimensional image compression may be adapted for compression of arrays of any dimension and data type, specifically for arrays of seismic data....
6160920 Cosine transforming and quantizing device, method of reducing multiplication operations in a video compressing apparatus  
In order to reduce the number of multiplication operations in a video compressing apparatus, a predetermined original quantizer matrix is compensated with a set of scaling coefficients derived from...
6157742 Method for expanding data  
In a data expanding method, compressed data including a plurality of blocks is first subjected to entropy decoding, block by block, in a horizontal direction. At a last block on each line, the...
6141455 Image encoding apparatus employing analog processing system  
An image sensing element for providing a series of voltage signals corresponding to a two-dimensional image, a two-dimensional analog DCT (discrete cosine transform) circuit for performing a...
6141457 Method and apparatus for processing a high definition image to provide a relatively lower definition image using both discrete cosine transforms and wavelet transforms  
A method and an apparatus for processing a high definition image using both an inverse discrete cosine transform (IDCT) and an inverse discrete wavelet transform (IDWT) to provide a relatively...
6141452 Apparatus for compressing and restoring image data using wavelet transform  
An apparatus for transforming image data using a Wavelet transform, including an image compressing apparatus having a Wavelet transforming unit for compressing digitized image data and an image...
6141456 Methods and apparatus for combining downsampling and inverse discrete cosine transform operations  
Methods and apparatus for combining linear image post-processing operations with an inverse discrete cosine transform (IDCT) operation are described. In accordance with various embodiments of the...
6125212 Explicit DST-based filter operating in the DCT domain  
An explicit DST-based filter that comprises a trigonometric transform module, first and second transform coefficient processors (TCPs), an inverse trigonometric transform module and first and...
6122400 Compression encoder bit allocation utilizing colormetric-adaptive weighting as in flesh-tone weighting  
A method and concomitant apparatus that adaptively utilizes at least chrominance information to control bit allocation in an MPEG-like compression encoder. The invention controls bit allocation of...
6115501 Grid moving method for minimizing image information of an object  
An improved grid moving method of an object image and an apparatus using the same which are capable of reducing the amount of information with respect to the image of an object by moving the grid...
6115500 Method and device for compressing image data  
Zigzag scanning is one of the key techniques in image data compression. An efficient method and device is needed in some dedicated cases. In the present invention, a fixed delay is performed...
6111989 1/4 size real time decoding of digital video  
A system and method to decode encoded video images in such a manner as to maintain high quality images while reducing the computation time needed to decode the images. The system takes into account...
6111987 Picture data compression coding device and method thereof  
A device for coding picture data by compression, and a method thereof. By preprocessing, the device calculates a picture activity of one frame of picture data. A quantizing table circuit selects a...
6108448 System and method for extracting spatially reduced image sequences in a motion compensated compressed format  
Given compressed video which supports the coding of interlaced frames through DCT and motion compensation, different construction methods are applied based on select DCT domain coefficients and/or...
6104838 1/16 size real time decoding of digital video  
A system and method to decode encoded video images in such a manner as to maintain high quality images while reducing the computation time needed to decode the images. The system takes into account...
6097846 Image processing device with inverse quantization and two dimensional inverse discrete cosine transformation  
Quantized DCT coefficients Rvu are inputted to a pre-processing unit, in which pre-processed DCT coefficients are obtained by multiplying a quantization/multiplying-term table and the quantized DCT...
6097838 Color correction of a compressed image  
The present invention is a method for the color correction of digital images that have been compressed. In a preferred embodiment, aspects of the color correction are carried out on the compressed...
6078690 Image data conversion device and method having function of inserting delimiter code into position in image data where a predetermined amount of data is reached  
An image data conversion device includes a variable-length code decoder which decodes compressed image data which has been compressed through processes of orthogonal transform, quantization, and...
6075906 System and method for the scaling of image streams that use motion vectors  
A system and method for scaling image streams that use motion vectors is disclosed. The system combines an error term with a predicted term in order to produce a display value. The system operates...
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