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7346217 |
Digital image enhancement using successive zoom images
A method and Electro-Optical (EO) system for processing imagery comprising selecting a first frame of data as a template frame; capturing a second frame of data using the EO system, for a plurality...
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6879631 |
Selective compression network in an MPEG compatible decoder
An MPEG decoder in a high definition television receiver decodes and decompresses MPEG coded data to produce decompressed image pixel blocks, and includes a motion compensation network coupled to a...
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6513162 |
Dynamic video communication evaluation equipment
In a dynamic video communication evaluation equipment for analyzing codes by multiple methods for evaluating a dynamic video image, an analysis including estimation is performed to fix a...
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6400765 |
Method and apparatus for decoding compressed video
A method and apparatus for video decoding of compressed video data begins by generating a plurality of coefficients based on run level data of two-dimensional frequency components corresponding to...
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6266447 |
Coding apparatus
A coding apparatus includes a large block forming unit for forming a large block of sample values of an input signal, a small block forming unit for dividing the large block into a plurality of...
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RE37091 |
Motion compensated prediction interframe coding system
A motion compensated prediction interframe coding system which first measures characteristics regarding the fineness of a pattern or texture of a picture, which is represented by an input...
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6122321 |
Methods and apparatus for reducing the complexity of inverse quantization operations
Methods and apparatus for implementing video decoders at a lower cost than known video decoders are described. The methods include data reduction techniques, simplified inverse quantization...
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5894518 |
Picture information transmission system and picture coding and decoding apparatus for use with it
A picture information transmission system enciphers and transmits picture information after interframe coding so that a receiving apparatus which does not have a cipher decoding device can decode...
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5867219 |
Image processing device using high frequency component suppression
An image processing device which receives digital image data compressed in a form of frequency components and applies signal processing to the digital image data is disclosed. The image processing...
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5818530 |
MPEG compatible decoder including a dual stage data reduction network
A television receiver with an MPEG decoder is configurable for full high definition decoding and display, or reduced cost lower definition display. The MPEG decoder (10-33) uses a controllable...
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5751357 |
Method and arrangement for coding and decoding a video data stream for all picture elements of the video data stream
A run length coding (RLC) is implemented in a coder/decoder unit (CD) in a forward path (VP) and a run length decoding (RLD) is implemented at the beginning of reconstruction in a reconstruction...
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5732157 |
Image processing apparatus and method using lossless encoding of a difference between image blocks
This invention has as its object to provide an image coding method which can efficiently encode image data by fully utilizing a two-dimensional correlation of an image. A block matching means...
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5619267 |
Video decoder including a control unit
A video decoder including a control unit (CC), a picture memory (P) and a loop filter (F) for blockwise decoding of coded video pictures (q). The blockwise decoding generally leads to artefacts in...
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5600375 |
Rendering an inter verses intra video encoding decision based upon a vertical gradient measure of target video frames
A video system renders an intra versus inter encoding decision for a digitally sampled target video frame of an image scene by subdividing the target video frame into cells. Each target cell...
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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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5537147 |
Apparatus and method for intraframe and interframe coding a digital video signal
A coding apparatus and method for intraframe and interframe coding a digital video signal to produce intraframe coded data and interframe coded data, respectively. The intraframe and interframe...
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5534927 |
Method of performing high efficiency coding of image signal and system therefor
A system for performing high efficiency coding of an image signal includes a differential signal generating section, a processing section, a supply section, a coefficient train outputting section,...
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5483287 |
Method for forming transport cells for conveying compressed video data
A digital compressed video signal transmission system includes a transport processor for segmenting compressed MPEG video data into transport cells for transmission. A plurality of data fields in...
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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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5436663 |
Device for encoding digital signals representing television pictures
Device for encoding interlaced-field picture signals, comprising a first variable-length encoding channel (10) and an associated first prediction channel (20), as well as a second variable-length...
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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...
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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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5402146 |
System and method for video compression with artifact dispersion control
Systems and methods that enable digital video compression techniques to manage and control artifact presence in each compressed frame of the video clip. Wherein specific embodiments are applicable...
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RE34824 |
Video coder
A coder assembles bursts of blocks of image data (e.g. transform coded coefficients) and associated overhead data into a sequence of data which are then transmitted. Both the transform coded...
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5251028 |
Apparatus for reducing quantization artifacts in an interframe hybrid coding system with motion compensation
Apparatus for reducing halos at moving edges adjacent flat areas in successive images produced by a system using differential pulse code modulation with motion compensation in which the output of a...
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5245427 |
Motion image data compression coding apparatus and image data compression coding method
A motion image data compression coding apparatus and an image data compression coding method capable of smoothing compressed data among frames are disclosed. A data amount of compressed data is...
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5144431 |
Television signal transmission system with temporal processing
A hybrid television signal of less transmission power (or better signal to noise performance) is made up by removing low frequency analog components from the video signal, digitizing them and...
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5103306 |
Digital image compression employing a resolution gradient
Video image compression apparatus and method provides full color, wide field of view, real time imagery having high central resolution. Compression ratios of 1600:1 are achieved thus reducing a...
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5091782 |
Apparatus and method for adaptively compressing successive blocks of digital video
The compression of successive blocks of digital data is optimized by selecting between different compression algorithms or different data formats on a block-by-block basis. In one application,...
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5005076 |
DCT video signal compression device with intrafield/interfield switching and adjustable high frequency filter
The digital signal is decomposed in intrafield blocks each comprising a set number of adjacent image elements, and each intrafield block, or an intrafield block or an interframe block derived...
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5001559 |
Transform coding using coefficient prediction techniques
A system and method for improving the quality of decoded images, without any cost to compression efficiency, in both progressive still frame and motion video applications wherein the images are...
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4953020 |
Television transmission system with differential encoding of transform coefficients
In a television transmission system for digital picture signals each picture is divided into sub-pictures of N×N picture elements for the purpose of limiting the bit rate. Each sub-picture is...
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4941042 |
Television transmission system including a hybrid encoding circuit
In a television transmission system each picture is subjected to a number of picture transforms for limiting the bit rate. In each picture transform the picture is partitioned into sub-pictures of...
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4887156 |
Method and system for transform coding of video signals
A coding system in accordance with the present invention includes a control signal generating circuit for generating a control signal indicative of a quantity of band limitation by calculating a...
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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...
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4837617 |
Method and means for coding and decoding picture information
A method and apparatus for coding and decoding picture information is described. According to prior art two modes, are utilized for transmitting picture information, respectively. According to the...
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4833535 |
Image transmission apparatus
An input image signal is divided into blocks each of 8 x 8 pixels, is subjected to cosine transform and is then converted to a signal of a spatial frequency region. After the cosine transform, the...
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4807029 |
Method of reconstructing image from compression-processed image signals
In a method of reconstructing an image from compression-processed image signals, the image is reconstructed from transformed image signals obtained by carrying out irreversible compression encoding...
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4734767 |
Encoder capable of faithfully and adaptively encoding a moving image
In an encoder responsive to a sequence of coefficient blocks each of which is composed of a plurality of orthogonal transform coefficients subjected to predictive encoding and orthogonal transform,...
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4707738 |
Adaptive process for the coding and decoding of a sequence of pictures by transformation and devices for performing this process
This process uses a bidirectional transformation by blocks for images representing highly animated scenes and also uses a differential coding of the transformation coefficients when the pictures...
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4704628 |
Combined intraframe and interframe transform coding system
An apparatus and method for signal processing employing intraframe and interframe variable prediction transform coding. Images are represented by sequential frames of two-dimensional arrays of...
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4675750 |
Video compression system
Video compression is achieved by taking the Hadamard transform of video data, comparing Hadamard coefficients from consecutive lines, encoding the changed coefficient values via an entropy coding...
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4672441 |
Method and apparatus for picture data reduction for digital video signals
Method and apparatus for the reduction of picture data for digital video signals comprising a processing of the signals by means of block by block transformation method so that a transformed and...
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4665436 |
Narrow bandwidth signal transmission
A method and apparatus for compressing digital data for transmission and reception in a narrow bandwidth, the method comprising preliminarily smoothing raw data according to a spatial convolution...
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4580162 |
Adaptive picture image compression system
An image compression system wherein the image is arranged in a block 1 of elements which are Hadamard transformed 2 and then quantized 3 into sequences. The DC component is prediction 4 into a DC...
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4541012 |
Video bandwidth reduction system employing interframe block differencing and transform domain coding
Video type information signals are compressed for transmission and reproduction by comparing corresponding blocks of time domain information signals from successive fields, converting a block of...
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4270025 |
Sampled speech compression system
A sampled speech compression and expansion system, for two-dimensional prssing of speech or other type of audio signal, comprises transmit/encode apparatus and receive/decode apparatus. The...
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4245248 |
Motion estimation and encoding of video signals in the transform domain
Video signals are encoded (FIG. 5) using motion compensated prediction which operates on a transform domain representation of the signal. The displacement estimate used for compensation is...
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4196448 |
TV bandwidth reduction system using a hybrid discrete cosine DPCM
An image-compression system, wherein the image consists of a planar array of data points having various brightness levels, comprises a transmitter and a receiver. The transmitter comprises an...
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3984626 |
Picture signal coder
In PCM and DPCM systems, a Hadamard orthogonal transformation of picture element signals is known to offer a means for reducing the bit rate for transmission of the signals. The first Hadamard...
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