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5552832 |
Run-length encoding sequence for video signals
Regions of a video frame are classified into different classes of regions (e.g., inter encoded blocks, intra encoded blocks, and skip blocks). The classes of regions are then run-length encoded...
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5543843 |
Communication jack nose cleaning tool
In a method of compressing a motion picture signal divided into blocks of picture data and in which each of the blocks is selectively compressed by discrete cosine transform (DCT) coding or by...
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5539468 |
Coding device and decoding device adaptive to local characteristics of an image signal
An image signal is divided into pixel blocks, each of which is subjected to orthogonal transform to be converted to transform coefficients. The transform coefficients are divided by respective...
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5535288 |
System and method for cross correlation with application to video motion vector estimator
Method and apparatus for computing cross-correlations with application to image processing and video motion estimation, particularly in video compression applications, are described....
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5534931 |
Encoding method and apparatus of digital video signal
A block segmenting circuit block segments a digital video signal. A block encoding circuit encodes the block segmented data. A head H records the encoded data on a tape. A block segmenting circuit...
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5534928 |
Apparatus and method for decoding a plurality of encoded video signals
An apparatus for decoding a plurality of video signals each encoded by one of intra-coding (I), predictive-coding (P) and bidirectionally-predictive coding (B). Errors in the encoded video signals...
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5533140 |
System for transmitting and/or storing signals corresponding to textured pictures
Device for transmitting and/or storing signals presented thereto representing the textures of different areas of a video picture. The device includes a sampling stage for deriving a reference...
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5526047 |
Scheme camera employing compression recording
A CCD digital camera used for storing an image of an object has an imaging device for receiving an image of the object and for generating a digital signal corresponding to the image. A memory...
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5526052 |
Quantization adaptive to the human visual system
An adaptive quantizing apparatus and method in HDTV according to the invention is capable of modifying a quantization spacing for the individual blocks to be processed in accordance with the human...
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5512956 |
Adaptive spatial-temporal postprocessing for low bit-rate coded image sequences
A 3D nonlinear postprocessing system and method are utilized to reduce coding artifacts produced by block-based motion-compensated transform coding. In the system and method, a separable 3D...
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5510841 |
Encoding apparatus in which flat subblocks are identified in blocks of a motion signal prior to coding the blocks and complementary decoding apparatus
In a picture signal encoding and/or decoding apparatus, respective blocks composing of 8×8 pixels are segmented into four subblocks composing of 4×4 pixels. A flatness of picture data is judged...
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5510904 |
Video data compressor minimizing propagation of error
Video data is compressed according to a bit rate to be subdivided into data blocks each having a predetermined number of bits. The blocks are sent to a shuffling circuit to undergo a shuffling...
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5504530 |
Apparatus and method for coding and decoding image signals
A compression-coded high definition television signal is decoded and converted to a standard NTSC signal without loss of interlacing so that the resulting picture exhibits smooth motion. The...
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5495298 |
Apparatus for concealing detected erroneous data in a digital image signal
An apparatus for concealing error data of pixel data in a digital image signal. The apparatus includes a deframing circuit for detecting errors every predetermined unit to generate a first error...
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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...
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5486863 |
Method for determining whether to intra code a video block
Whether to encode a present video block of an incoming video frame, i.e. intra code, or whether to encode the difference between the present video block of the incoming frame and a best match video...
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5485212 |
Software video compression for teleconferencing
In a method and apparatus for producing a signal for transmission to a receiver, a video signal is converted to digital form and the data of sequential frames of the signal are arranged in a...
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5485533 |
Method and apparatus for encoding video signals in 3-D blocks without detecting image motion
A coding method and apparatus is for coding a digital video signal of interlaced type. Three-dimensional (horizontal, vertical and temporal directions) blocks are constructed for each of a...
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5485213 |
Method and apparatus for encoding and decoding image data
A designated field image is extracted instead of a frame image and only the effective block of the field image which was judged as a block having a change is also encoded. Block information and...
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5475501 |
Picture encoding and/or decoding method and apparatus
A picture encoding and/or decoding system adaptively changes encoding manner in discrete cosine transformation or predictive coding for improving a picture quality of transmission picture. A...
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5475434 |
Blocking effect attenuation apparatus for high definition television receiver
A blocking effect attenuation apparatus for a high definition television receiver, includes a variable length decoder for receiving encoded video data and extracting therefrom a quantization level,...
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5473376 |
Method and apparatus for adaptive entropy encoding/decoding of quantized transform coefficients in a video compression system
The present invention is a method (100) and apparatus (300) for adaptive entropy encoding/decoding of a plurality of quantised transform coefficients in a video/image compression system. For...
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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...
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5471248 |
System for tile coding of moving images
A video image frame consisting of a two-dimensional array of picture elements (pixels) is decomposed into a set of rectangular image portions (tiles). Within each tile, variance between pixel...
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5469216 |
Apparatus and method for processing a digital video signal to produce interpolated data
Apparatus and method for processing a digital video signal having an inner block of pixel data that represents an image spatially located within an outer block of pixel data. A class code of the...
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5463701 |
System and method for pattern-matching with error control for image and video compression
Disclosed is a system and a method for compressing digitized color video data by generating codes into a pattern of tables for regions in frames of the video data exhibiting certain patterns. An...
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5459518 |
Segmenting image signals for encoding using quantization analysis
A cell of an image is segmented into two or more subcells. According to one embodiment, the nullity of each of the subcells is classified and the cell is encoded in accordance with the nullity of...
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5455629 |
Apparatus for concealing errors in a digital video processing system
A digital video signal processing system includes apparatus for concealing errors which might occur in reproduced images due to image data lost during signal transmission. The system includes...
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5453787 |
Variable spatial frequency chrominance encoding in software motion video compression
An image-compression/decompression system employs a variable spatial-frequency encoder to encode the chrominance information contained within a video image. The system divides the video image into...
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5453789 |
Moving-image signal encoding apparatus
A moving-image signal encoding apparatus is provided in which information to be lost is suppressed to a minimum extent when a cell is lost in a transmission line. A cell assembler divides a...
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5448297 |
Method and system for encoding images using skip blocks
A region of an image having a plurality of corresponding image values is encoded to generate a temporary encoded region. The temporary encoded region is then decoded to generate a decoded region....
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5448298 |
Image information transmitting system
In an image information transmitting system of this invention, an image information signal constituted by a plurality of data constituting one frame is input. A plurality of pixel data blocks each...
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5444800 |
Side-match and overlap-match vector quantizers for images
There is disclosed a method and apparatus for data coding for image transmission or storage in which vector quantization enables good image quality at reduced transmission or storage bit rates by...
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5440346 |
Mode selection for method and system for encoding images
A similarity measure is generated as a function of a plurality of values corresponding to a region of an image. An encoding mode is then selected in accordance with the similarity measure and the...
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5440344 |
Video encoder using adjacent pixel difference for quantizer control
When a digital video signal is compressed, the amount of resulting data is predicted and the quantization level is controlled so as to obtain a constant bit rate. The prediction is made by...
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5436666 |
Limited-domain motion estimation/compensation for video encoding/decoding
Methods and apparatuses for encoding video images using motion estimation and decoding encoded video images using motion compensation, where the motion estimation and/or the motion compensation is...
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5432556 |
Coding apparatus
A coding apparatus reduces a digital image signal. The coding apparatus includes a block formatting circuit for dividing the digital image signal into blocks of a plurality of picture elements, an...
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5428395 |
Encoding and decoding method and apparatus thereof using a variable picture partitioning technique
An encoding and decoding system in which video data is partitioned into blocks, each of which has a predetermined dimension, and the partitioned block is encoded and decoded. To suppress blocking...
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5422963 |
Block transform coder for arbitrarily shaped image segments
A Transform Coder Unit (TCU) to transform an arbitrarily shaped image into optimal transform coefficients (OTC) for data transmission. The TCU comprises a forward transform which transforms the...
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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...
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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...
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5414527 |
Image encoding apparatus sensitive to tone variations
An encoding system which prevents deterioration of a picture quality and provides a high encoding efficiency even when the size of a block is increased to enhance an encoding efficiency. An input...
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5410350 |
Motion picture encoding and/or decoding system
A motion picture coding and decoding system is provided, which permits high picture quality to be obtained with less information amount than that in case of a system having the sole function of DCT...
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5398067 |
Picture data processing apparatus
A picture data processing apparatus, which is suitably applied, for instance, to a television conference system in which picture data are transmitted in the form of codes prevents, deterioration of...
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5396567 |
Process for adaptive quantization for the purpose of data reduction in the transmission of digital images
A process for adaptive quantization with quantization errors which have little disturbing visual effects, using a digital block-related process for data reduction in digital images or image...
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5392072 |
Hybrid video compression system and method capable of software-only decompression in selected multimedia systems
Hybrid compression processes for digital color video data that enables software only playback of the compressed digital video in low-end computers, wherein intraframe and interframe compression...
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5387938 |
Adaptive interframe/intraframe block coding method and apparatus
In an image coding method, a picture is divided into blocks composed of adjacent plural pixels, and a reference picture is used to predict the picture to be coded. A block including an image region...
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5384849 |
Apparatus and method for encoding/decoding data including the suppression of blocking artifacts
A method and apparatus for removing blocking artifacts in an encoder/decoder system. The encoder includes a delay device for delaying original input frame data, a decoder for decoding the...
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5374958 |
Image compression based on pattern fineness and edge presence
Alternating current coefficients in a block of orthogonal transform coefficients representing a digital image are quantized with a quantization step size selected with regard to whether the block...
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5347308 |
Adaptive coding method for interlaced scan digital video sequences
An efficient coding system for interlaced scan video sequences. An input picture is partitioned into smaller blocks of pixel data where the two fields in each blocks are rexamined for correlation....
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