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7349579 |
Image processing device, image processing method, and image reading method
The present invention provides an image processing device, an image processing method, and an image reading method, by which encoded data can be easily generated from sub-sampled image data,...
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7302107 |
JPEG encoding for document images using pixel classification
The invention provides a system and method for JPEG encoding an image that includes variable quantization for each block, depending upon the classification of each block, which is dependent on the...
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7203375 |
Quantization error compensation apparatus and method thereof
A quantization error compensation includes a dividing unit to divide an input current image signal into a first high-frequency signal and a low-frequency signal; a changing unit to replace bits of...
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7151856 |
Picture coding apparatus and picture coding method
A frame group target bits number calculating unit ( 31 ) reads the total number of bits on frame group basis allocatable to residual frames from a storing unit ( 36 ), updates subtracting the...
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7042949 |
Robust data transmission using broadcast digital television signals
A DTV signal includes frames, and the frames include data segments. Data segments are replaced by codewords which represent digital data. The DTV signals are broadcast and received by receivers....
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7020194 |
Apparatus and method for vector descriptor representation and multimedia data retrieval
The present invention relates to an apparatus and a method for vector descriptor representation and multimedia data retrieval, which can quantize a plurality of feature values described by a vector...
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7003039 |
Dictionary generation method for video and image compression
This invention relates to the creation of dictionary functions for the encoding of video signals using matching pursuit compression techniques. After an initial set of reference dictionary images...
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6968092 |
System and method for reduced codebook vector quantization
The present invention extends the generalized Lloyd algorithm (GLA) for vector quantizer (VQ) codebook improvement and codebook design to a new linearly-constrained generalized Lloyd algorithm...
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6968010 |
Method for efficient low power motion estimation of a video frame sequence
A method for efficient low power motion estimation of a digital video image is provided in which processing requirements are reduced based upon the content being processed. The method performs...
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6947944 |
Database managing apparatus and database record retrieving apparatus
A database managing apparatus, which can immediately obtain desired data from a database. A database managing apparatus includes a CPU, an input/output device, a main memory and an external memory....
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6944227 |
Method and apparatus for motion vector field encoding
A method and apparatus for representing motion in a sequence of digitized images derives a dense motion vector field and vector quantizes the motion vector field.
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6925119 |
Process and system for the compression of digital video signals, a system and a computer program product therefor
A process for encoding digital video signals organized in frames comprises the operations of dividing the frames into blocks starting from macroblocks subjected to motion-compensation and applying...
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6898326 |
Image processing apparatus and method
A transformation unit 102 transforms an entered image to multi-resolution space. A quantizer 105 performs vector quantization on a local pattern of an image of a multi-resolution...
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6859558 |
Method for eliminating blocking effect in compressed video signal
The present invention relates to a method for eliminating a blocking effect in a compressed video signal signal. The method of the invention includes: the encoding step of eliminating a blocking...
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6853683 |
Regularized dequantizer for DCT-based transform coding
A new dequantization scheme for DCT-based transform coding, such as JPEG, MPEG and H.26x, is disclosed. The new approach drastically reduces blocking artifacts without smoothing the decoded image....
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6834081 |
Coding apparatus and method for orientation interpolator node
An encoding apparatus and method for an orientation interpolator node are provided. The encoding apparatus for an orientation interpolator node, which provides information on the rotation of an...
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6829302 |
Pixel calculating device
A pixel calculating device that performs vertical filtering on pixel data in order to reduce frame data in a vertical direction. The pixel calculating device includes a decoding unit 401 for...
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6807312 |
Robust codebooks for vector quantization
A method for data compression. An encoder receives data vectors from an original data set. The encoder uses a vector quantization codebook to encode the data vectors into encoded vectors. The...
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6754282 |
DC-free run length constrained line coding with channel gain
A dc-free coding scheme that also provides channel gain employs a code that is based on an alphabet of two and comprises a list of N-dimensional vectors, where N is even, with a maximum run of two...
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6728413 |
Lattice vector quantization in image compression and decompression
The invention proposes a method of determining an index of a code vector (VC k ) belonging to a predetermined lattice, characterised in that it includes the steps of: determining (E 47 ) a leader...
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6728319 |
Decoding method and apparatus
A decoder in a communication system using channel optimized vector quantization and including an encoder stores active encoder centroids c i corresponding to active indices i, an active index...
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6701021 |
System and method for encoding/decoding multidimensional data using successive approximation multi-stage vector quantization
The present method relates to a method for encoding image data using vector quantization. According to the invention, a small first codebook is determined. Each image vector of the image data is...
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6671416 |
Method for transmitting data using an embedded bit stream produced in a hierarchical table-lookup vector quantizer
A transmission method for video image data using an embedded bit stream in a hierarchical table-lookup vector quantizer comprises the steps encoding an image using hierarchical vector quantization...
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6628718 |
Color solid-state image-pickup camera system
A color solid-state image-pickup camera system is provided with a color solid-state image-pickup unit for acquiring image information by picking up an image of a subject, a vector quantization...
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6625323 |
Method for compressing and decompressing digital having text
A method for compressing a digital image having both saturated text and/or line art and pictorial imagery, the method comprises the steps of: receiving the digital image as blocks of pixels;...
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6584232 |
Image encoding apparatus, image encoding method, and recording medium in which image encoding program is recorded
The block reducing unit 201 reads one block out of each block group. The pixel reducing unit 202 reads pixels on one-out-of-four basis. The block reading unit 203 sequentially reads out...
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6546146 |
System for interactive visualization and analysis of imaging spectrometry datasets over a wide-area network
The present invention relates to a method of viewing and processing hyper-spectral image data compressed using a VQ algorithm. According to the invention the data is compressed using a codebook of...
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6546049 |
Parameterized quantization matrix adaptation for video encoding
In video compression processing, such as MPEG-2 compression processing, the quantization (Q) matrix used to quantize discrete cosine transform (DCT) coefficients is updated from frame to frame...
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6539122 |
Adaptive wavelet coding of hyperspectral imagery
A hyperspectral image encoder ( 10 ) for compressing hyperspectral imagery includes a differential pulse code modulation (DPCM) loop ( 26 ) to perform data decorrelation in the spectral domain and...
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6535555 |
Quantizing method and device for video compression
The invention concerns a method comprising a step which consists in a quantizing step relative to a pixel or group of pixels in accordance with a desired rate. The invention is characterized in...
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6529553 |
HVQ compression for image boundaries
In a system where two types of data are to be compressed using hierarchical vector quantization (HVQ), it would be typical for there to be two compression tables, one optimized for each type of...
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6516297 |
Multiple description lattice vector quantization
Data is transmitted using multiple description vector quantization by first quantizing the source vector at a lattice vector quantizer. After quantization, a labeling function is applied to the...
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6501797 |
System and method for improved fine granular scalable video using base layer coding information
There is disclosed an apparatus for controlling the transmission of enhancement layer video data for use in a video encoder containing a base layer encoder and an enhancement layer encoder. The...
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6470052 |
HVQ compression combined with orthogonal rotation
Using hierarchical vector quantization (HVQ) to accomplish rotation in addition to compression and decompression. During the compression step the image is divided into segments and each segment is...
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6404820 |
Method for storage and reconstruction of the extended hamming code for an 8-dimensional lattice quantizer
A method of lattice-quantizing an eight-long data point to minimize storage requirements by acquiring the data point, multiplying each coordinate of the data point by {square root over (2)} to form...
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6360020 |
Method and arrangement for vector quantization and for inverse vector quantization of a digitized image
In a vector quantization of a digitized image, image regions (QB) to be quantized are selected smaller than, for example, image blocks (BB) of an image (B). In the reconstruction, image points...
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6320907 |
Adaptive tree-search vector quantization in MPEG2 decoder
The memory requirement of MPEG decoders and SQTV/IQTV systems may be reduced by recompressing the MPEG decoded data stream before storing pixels in an external RAM. An efficient compression method...
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6314393 |
Parallel/pipeline VLSI architecture for a low-delay CELP coder/decoder
An integrated circuit for processing a speech signal in accordance with a CELP standard includes a plurality of processing elements coupled to a data bus in parallel. Each processing element...
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6301303 |
Method and apparatus for predictively coding shape information of video signal
A method and an apparatus for predictively coding shape information of a video signal. An error between the current shape information and the previous shape information is obtained through the...
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6266817 |
Decoder for a software-implemented end-to-end scalable video delivery system
A decoder is used in an end-to-end scalable video delivery system operable over heterogeneous networks. The decoder may software-based and computationally low complexity, or may be implemented...
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6266375 |
Method and apparatus for selecting a quantization table for encoding a digital image
A method and apparatus for selecting a quantization table containing quantization coefficients for encoding image data. A set of quantization tables is examined to determine a quantization table...
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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...
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6222885 |
Video codec semiconductor chip
A semiconductor chip integrating various functional blocks of a video codec for use in a system for real time record and playback of motion video through a computer interface such as a...
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6188729 |
Method and apparatus for effecting seamless data rate changes in a video compression system
A video compression system comprises a control computer 52; a plurality of encoders 54, 56, 58; a plurality of encoder buffers 60, 62, 64; a multiplexor 66; a data channel 70; a demultiplexor 80; a...
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6151416 |
Method and apparatus for adaptive class tap selection according to multiple classification
A method, apparatus, and article of manufacture for restoring a deteriorated signal to an undeteriorated signal. A deteriorated signal consists of a plurality of deteriorated and undeteriorated...
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6151414 |
Method for signal encoding and feature extraction
A new encoder is provided which operates on a database of n-dimensional signal vectors where such signal vectors are restricted to being non-negative. In the establishment of a codebook for this...
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6141458 |
Method and apparatus for increasing the speed of a full code book search in a quartizer encoder
A novel vector quantization encoding system comprises a conventional vector formatter and a novel gross quantizer. The vector formatter generates vectors to be searched in a full code book of...
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6115725 |
Semiconductor arithmetic apparatus
The real time compression of moving images employing vector quantization is realized using simple hardware and with an optimal compression ratio with respect to the communication line capacity...
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6108381 |
Tree search vector quantization for compressing digital video data to be stored in buffers and MPEG decoder and SQTV processor with reduced memory requisites
A method for reducing the RAM requirement for temporarily storing a stream of data blocks in a coding/decoding system of information transferable by blocks, includes the steps of: compressing and...
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6072910 |
Method and apparatus for coding image information, and method of creating code book
A coding apparatus divides digital image information into pixel blocks each having a size of m×n pixels, and subjects the image information to vector quantization in block units. The pixel blocks...
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