|
Match
|
Document |
Document Title |
|
|
5303058 |
Data processing apparatus for compressing and reconstructing image data
An image data processing apparatus for fast coding and reconstructing continuous-tone image data, parallelly processes DCT coefficients in pipelined quantization and dequantization. An image data...
|
|
|
5301032 |
Digital image compression and decompression method and apparatus using variable-length coding
Disclosed is a digital image compression and decompression method and apparatus for dividing a supplied digital image signal into blocks of predetermined size, performing variable-length coding of...
|
|
|
5299238 |
Signal decoding apparatus
A decoder for reproducing information from an encoded signal that has been frequency-domain transformed by a transform conversion circuit in response to audio signal samples grouped into...
|
|
|
5299025 |
Method of coding two-dimensional data by fast cosine transform and method of decoding compressed data by inverse fast cosine transform
A method of encoding two-dimensional original image data through fast cosine transformation FCT, the method including steps of inputting each block of N×N picture elements from the image data and...
|
|
|
5299019 |
Image signal band compressing system for digital video tape recorder
The image signal band compressing method employs a three-dimensional motion compensating technique, an intraframe and an interframe processes which are alternatively executed. The transfer rate of...
|
|
|
5299239 |
Signal encoding apparatus
A signal encoding apparatus for cutting out blocks of an input signal waveform at a predetermined time interval and converting the in-block signal by mutually independent conversion axes for...
|
|
|
5299240 |
Signal encoding and signal decoding apparatus
A system for encoding audio signals, transmitting or recording the encoded audio signals, and then decoding the transmitted audio signal includes a circuit for determining the block length of the...
|
|
|
5293434 |
Technique for use in a transform coder for imparting robustness to compressed image data through use of global block transformations
A technique for use in, illustratively, a transform coder for imparting robustness against burst (or similar) errors to data patterns, such as illustratively two-dimensional image data, that...
|
|
|
5293252 |
Method of compressing digital image data and device thereof
A method of compressing digital image data and a device thereof of coding digital image data within constant rate data not deteriorating a resolution of an image without regard to a complexity of...
|
|
|
5289289 |
Image data coding apparatus and coding method for dynamic-image data
The image data coding apparatus has an image pickup system for generating at least dynamic images. The apparatus further comprises a data processing section, two transforming sections, a quantizing...
|
|
|
5289548 |
Compression and reconstruction of radiological images
The present invention provides for a compression scheme tailored to the compression of large radiological images processed with image processing workstations. The compression scheme is a variation...
|
|
|
5276784 |
2-D discrete cosine transform circuit with reduced number of multipliers
An image data processing apparatus includes a <v> calculating block 7 for calculating a vector <v> from a vector <x> which has 64 elements in a real space and which has been...
|
|
|
5272528 |
Information recording apparatus
An information recording apparatus implements the orthogonal transformation for the input signal on a block-by-block basis, separates each variable-length coded word into a fixed part and separate...
|
|
|
5263100 |
Image coding method and apparatus
In an image coding system for coding a digital image signal sequence into a coded signal sequence and transmitting an amount of information of the coded signal at a fixed bit rate, an image coding...
|
|
|
5260808 |
Image processing apparatus
The invention is intended to improve image quality in a process of image coding. In an apparatus for quantizing conversion data resulted from converting image information into frequency regions and...
|
|
|
5241395 |
Adaptive transform coding using variable block size
An adaptive transform coding algorithm for a still image utilizes a quadtree based variable block size discrete cosine transform to achieve a better tradeoff between bit rate and image quality. The...
|
|
|
5223926 |
Compression of video signals
A digital video signal is compressed by spatial sub-band filtering to form data sets constituting respective sub-bands of the two-dimensional spatial frequency domain. The data sets for a field or...
|
|
|
5189526 |
Method and apparatus for performing image compression using discrete cosine transform
A method and apparatus for performing data compression is disclosed that does not require interpolation of pixel data in order to define image blocks. More specifically, the present invention...
|
|
|
5187755 |
Method of and apparatus for compressing image data
Image data (f ij ) depicting an image in a pixel block are converted by 2-D Discrete Cosine Transformation into transformation coefficients (F mn or F mn *). Only a part of the coefficients are...
|
|
|
5168375 |
Image reconstruction by use of discrete cosine and related transforms
A method for processing a field of image data samples to provide for one or more of the functions of decimation, interpolation, and sharpening is accomplished by use of an array transform processor...
|
|
|
5166987 |
Encoding apparatus with two stages of data compression
In a highly efficient encoding apparatus, image data are encoded by multiple encoding techniques so as to obtain highly compressed image data. For example, a block segmentation circuit segments...
|
|
|
5163103 |
Discrete cosine transforming apparatus
A discrete cosine transforming apparatus for exercising a 2 n +1 th order discrete cosine transform includes a plurality of basic arithmetic circuits A including circuits for temporarily storing...
|
|
|
5162923 |
Method and apparatus for encoding frequency components of image information
An image encoding method, and an apparatus therefor, enabling rapid comprehension of the outline of the entire image promptly, at the decoding of the encoded image information, and also an image...
|
|
|
5150432 |
Apparatus for encoding/decoding video signals to improve quality of a specific region
An image encoding apparatus comprises a region detecting circuit for detecting a specific region from input image signals and outputting the region specifying signal for discriminating the specific...
|
|
|
5150433 |
Histogram/variance mechanism for detecting presence of an edge within block of image data
An edge detection mechanism for an imagery signal compression and transmission system processes histogram and variance data to identify the presence of a uniform area with a block of transform...
|
|
|
5142380 |
Image data processing apparatus
An image data processing apparatus includes a converter for subjecting each block to a discrete cosine transform (DCT) to convert blocks into DCT coefficients, a first memory for temporarily...
|
|
|
5140417 |
Fast packet transmission system of video data
A transmission system for packaging and transmission digital video data divides the data into a first group of components which would cause image quality to be drastically damaged if discarded, and...
|
|
|
5126962 |
Discrete cosine transform processing system
A three dimensional (3D) discrete cosine transform (DCT) uses one dimensional DCT networks for transforming and inverse-transforming blocks of data, such as image data. The 3D DCT configuration...
|
|
|
5086488 |
Transform coding apparatus
This invention relates to a transform coding apparatus where linear transform is performed for input signal series such as image signals, and transform coefficients are quantized from lower...
|
|
|
5054103 |
Picture encoding system
A picture encoding system which performs a prediction of picture element values within a block having a plurality of picture elements into which an original picture is divided, a discrete sine...
|
|
|
5046121 |
Image data compression apparatus
An image data compression apparatus, in that a component characteristic value of an AC component in a block obtained by dividing digital tonal image data is compared with a predetermined threshold...
|
|
|
5014198 |
Image information compression apparatus
An image compression apparatus for compressing medical information such as X-ray image data divides the image data into blocks and extracts the region of interest from the image data, excluding the...
|
|
|
4922273 |
Compression method of halftone image data
A halftone image data compression method includes steps wherein digital halftone image data is divided into a plurality of blocks, orthogonal transformation is performed in units of blocks to...
|
|
|
4910609 |
Teleradiology system
A teleradiology system capable of scanning X-ray images and the like and transmitting the scanned images to various locations is disclosed. The images may be compressed for storage or transmission....
|
|
|
4860112 |
Teleradiology system having multiple compressor/expanders
A teleradiology system capable of scanning X-ray images and the like and transmitting the scanned images to various locations is disclosed. The images may be compressed for storage or transmission....
|
|
|
4754491 |
Cosine transform computing devices, and image coding devices and decoding devices comprising such computing devices
The invention provides cosine transform computing devices and image decoding devices and coding devices comprising such computing devices. One embodiment of a device for calculating monodimensional...
|
|
|
4754492 |
Method and system for adapting a digitized signal processing system for block processing with minimal blocking artifacts
A method and apparatus for processing n-dimensional digitized signals containing at least two adjacent blocks of digitized sample values. The digitized signal is transformed in accordance with a...
|
|
|
4394774 |
Digital video compression system and methods utilizing scene adaptive coding with rate buffer feedback
A digital video compression and expansion system and its methods for compressing and expanding digitalized video signals in real time at rates up to NTSC color broadcast rates are disclosed. The...
|
|
|
4293920 |
Two-dimensional transform processor
A processor capable of performing a two-dimensional transform on high speed serial sampled analog raster scanned data and outputing the results in a parallel fashion so as to provide for a data...
|
|
|
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...
|