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5347309 |
Image coding method and apparatus
An inter-field motion vector of an interlaced scanned inputted image is detected, and, using the detected inter-field motion vector, movements between fields are compensated to constitute a frame....
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5347311 |
Method and apparatus for unevenly encoding error images
A method and apparatus for partially encoding an image. The image is divided into a plurality of blocks and one block is selected for processing. A boundary lying along the selected block that is...
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5341442 |
Method and apparatus for compression data by generating base image data from luminance and chrominance components and detail image data from luminance component
A method and apparatus for compressing YUV color image data representing an image. The method includes the steps of generating base image data containing low frequency image information where the...
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5337086 |
Image signal coding and decoding apparatus with multiple-process motion compensation
Image signal coding and decoding apparatus adapted to reduce the redundancy between motion vectors in divided blocks of an image to realize enhanced data compression. The coding apparatus comprises...
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5337088 |
Method of correcting an image signal decoded in block units
In signal processing method, bandwidth compression codes an image signal by blocks of plural proximal pixels, and outputs the decoded signal after decoding by the same block units. When a level...
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5337049 |
Efficient coding signal processor
An efficient coding signal processor for encoding information signals input in a sequence of block units in a manner of unifying an amount of information at a unit of N frames (N≥1) which...
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5307177 |
High-efficiency coding apparatus for compressing a digital video signal while controlling the coding bit rate of the compressed digital data so as to keep it constant
Digital video signals are divided in blocks, maximum and minimum values of each block are extracted, and a frequency distribution of one frame period of a dynamic range in each block is detected....
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5301018 |
Method and apparatus for shuffling image data into statistically averaged data groups and for deshuffling the data
In a data compression process such as employed to compress video or other data, it is preferable not to compress the image data representative of the video image in a sequential format, or to take...
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5298990 |
Video signal block forming method
When dividing a video signal composed of horizontal H pixels and vertical V pixels into blocks of (m×n) pixels composed of horizontal m pixels and vertical n pixels, when the number of horizontal...
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5289274 |
Electronic image stabilization apparatus
A video signal processing apparatus includes circuitry which generates a motion vector which represents the amount and direction of motion which occurs between consecutive frames of a video signal...
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5283646 |
Quantizer control method and apparatus
A method and apparatus for enabling a real time video encoding system to accurately deliver the desired number of bits per frame, while coding the image only once, updates the quantization step...
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5282031 |
Fixed bit rate compression encoding method
A fixed bit rate compression encoding method for dividing a two-dimensional video signal into DCT blocks and encoding the transform coefficients of each DCT block at a certain compression rate. The...
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5282030 |
Endoscopic image processor and endoscopic image processing method
A group of vectors are set to transform each signal of an endoscopic image resolved into a plurality of color signals into a plurality of new color signals based on statistical characteristics of...
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5272529 |
Adaptive hierarchical subband vector quantization encoder
A method system for data reduction of digital video signals based on vector quantization of vectors formed from coefficients of a discrete cosine transform of pixel blocks. The coefficients are...
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5262854 |
Lower resolution HDTV receivers
A receiver for receiving block coded HDTV compressed digital video signals decimates the data in each block to produce NTSC resolution images but with a significant savings in receiver hardware.
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5253055 |
Efficient frequency scalable video encoding with coefficient selection
An improved technique for efficient frequency scaling wherein the number of coefficients to be included in each sub-block is selectable, and a code indicating the number of coefficients within each...
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5249053 |
Filmless digital camera with selective image compression
In a filmless digital camera, each image is individually evaluated and the compression applied in such manner as to retain maximum quality while fitting the data into the pre-assigned memory. For...
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5245428 |
Television system for transmitting picture signals in a digital format
To be able to transmit television pictures in a digital format on a medium having a limited bandwidth, the picture are subjected to a coding operation and thereby converted into a series of...
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5241381 |
Video signal compression using 2-d ADRC of successive non-stationary frames and stationary frame dropping
An apparatus for highly efficient encoding of a digital image signal comprising frames of pixels converts the digital image signal into a blocked signal, sub-samples the blocked signal to reduce...
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5237397 |
Color video data processing
A method for determining if uncompressed color video data was previously compressed and decompressed. Each block of color video data is examined to determine if the block was previously compressed...
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5220421 |
Multichannel encoding method
In a multichannel encoding method for encoding digitized pictures, in particular digitized stereoscopic television pictures, the digitized pictures are processed in different channels comprising at...
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5206723 |
Motion estimator
A motion vector for motion-compensated prediction in an inter-frame differential video coder is derived by comparing each block in a row of a current frame with the corresponding region, and...
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5204740 |
Image signal decoding apparatus
An image signal decoding apparatus for decoding a transmitted image information signal into an original image signal: wherein a one frame image signal constructed of a plurality of image signals is...
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5196931 |
Highly efficient coding apparatus producing encoded high resolution signals reproducible by a VTR intended for use with standard resolution signals
A highly efficient coding apparatus encodes high resolution digital video data so it can be decoded as either high resolution format or standard resolution format video data. The high resolution...
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5196933 |
Encoding and transmission method with at least two levels of quality of digital pictures belonging to a sequence of pictures, and corresponding devices
An encoding and transmission method with at least two levels of quality of digital pictures, each digital picture being formed by at least one matrix of encoded picture elements, wherein each of...
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5193003 |
Apparatus for decoding digital video data with small memory requirement
A decoding apparatus for receiving data transmitted from transmission equipment which performs subsampling so that a sampling phase is inverted between n frames (n is an integer), converts data...
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5175631 |
Apparatus for recording and reproducing a digital video signal in the form of order-rearranged and coded data
A video signal digital recording and reproducing apparatus includes: a rearranging section for rearranging a sequence of signals on a rectangular unit by rectangular unit basis formed by sectioning...
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5164819 |
Method and system for coding and compressing color video signals
A data compression system for reducing the bit rate for transmission of a color television signal to a value that telephone lines and hard wired systems can accommodate employs a two-color plus...
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5159448 |
Highly efficient coding apparatus
A highly efficient coding apparatus is made for developing a prediction value from a value which is ahead in time, correlation. The apparatus comprises, first to M-th prediction circuits supplied...
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5144424 |
Apparatus for video data quantization control
Apparatus for quantizing compressed viedo data arranged in macroblocks calculates a quantizing parameter independently for each macroblock. The apparatus determines the relative coding complexity...
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5122877 |
Method of transmitting a digital video signal and a receiver for use in the method
For the transmission of a digital video signal via a transmission medium (11) consecutive pictures of N×M picture elements are subsivided into sub-pictures, a sub-picture being asembled from n×m...
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5099325 |
Process and circuit for block matching in two-dimensional picture signals
For processing data signals representative of pixels, each of the pictures s scanned, column per column in successive horizontal bands each having a height equal to an entire fraction of the height...
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5070402 |
Encoding image information transmission apparatus
An image information transmission apparatus of this invention encodes and transmits image information. An image information signal of one frame consisting of a plurality of pixel data is divided...
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5068726 |
Coding apparatus that temporally interpolates block data and selects transmission mode
A highly efficient coding apparatus comprises a, circuit (2) for block-segmenting picture element data in areas belonging to each of continuous n (n≥2) frames of digital picture signals,...
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5067015 |
Method of processing video image data for use in the storage or transmission of moving digital images
A method of processing video image data for use in the storage or transmission of moving digital video images, includes decomposition of each frame image into an equivalent set of sub-images...
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5049990 |
Highly efficient coding apparatus
In a highly efficient coding apparatus, for coding digital video data in a block format and allowing video data compression for transmission using a data transmitter having a predetermined...
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5047854 |
Image information transmission system transmitting maximum and minimum value data
An image information transmission system that transmits image information, one frame of which is constituted by a plurality of image data. The plurality of pixel data corresponding to the one-frame...
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5040060 |
Image information transmission system with compression based on still-image redundancy
An image information transmission system for transmitting multi-pixel frames of image information, upon transmission, the data corresponding to a frame are divided into blocks each containing a...
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5036391 |
Synchronization method for the transmission, of an asynchronous channel, or a series of pictures encoded by means of a variable length code, and device for the implementation of this method
The synchronization method, consists in transmitting, in addition to the data: inter-block separators, for separating the data corresponding to separate blocks, each inter-block separator...
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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...
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5028996 |
Picture coding method
Motion vectors are determined in each frame of the input image data, and optimum motion vectors characterizing the motion are extracted from the determined motion vectors, a three-dimensional block...
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5023716 |
Image information signal transmitting system
An image information signal transmitting system of this invention is a system which divides an image information signal for one picture constituted by a set of picture element data into blocks each...
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5023715 |
Method of and apparatus for transmitting image information
An image information transmission method divides a frame of image data into a plurality of blocks each having a unit block constituted by a predetermined number of picture element (pixel) data. A...
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5019903 |
Spatial interpolation between lines of a supersampled digital video signal in accordance with a gradient vector selected for maximum matching of blocks of samples which are offset in opposite directions
In apparatus for spatially interpolating between lines of a digital video signal, to produce interpolated lines, a supersampler horizontally interpolates between samples of the signal to produce a...
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5006929 |
Method for encoding and transmitting video signals as overall motion vectors and local motion vectors
A redundancy reduction algorithm, such as hybrid DCT, is applied to a video signal and is subsequently encoded by pixel blocks, and motion vectors are generated for each image block. At least one...
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4947249 |
Apparatus in which subsampling and block coding are both employed for coding digital video data
An apparatus for coding digital video data represented by respective picture element data determines at least one elementary picture element for each block and predicts values of respective picture...
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4933763 |
Method of and arrangement for coding digital video signals and corresponding decoding arrangement
Method of coding images converted into digital video signals in accordance with a format having three-dimensional blocks of the signals, wherein the method includes the following preliminary steps:...
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4931954 |
Image storage system and method of storing images such that they are displayed with gradually increasing resolution
A series of data access is performed wherein a representative pixel of each divided region obtained by dividing an original image frame into a plurality of regions is sequentially accessed while...
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4922341 |
Method for scene-model-assisted reduction of image data for digital television signals
A method for scene-model-assisted reduction of image data for digital television signals, whereby a picture signal supplied at time t is to be coded, whereby a predecessor frame from a scene...
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4920426 |
Image coding system coding digital image signals by forming a histogram of a coefficient signal sequence to estimate an amount of information
In an image coding system having a plurality of coding characteristics, such as quantization characteristics, information of a digital image signal sequence is monitored in each of a number of...
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