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7466867 Method and apparatus for image compression and decompression  
An image compression method for compressing groups of pixel data, including the following steps: MSB portions and LSB portions of the pixel data are compressed separately. Further, the LSB portions...
7388996 Method for filtering digital images, and a filtering device  
The invention relates to a method for reducing visual artefacts in a digital image, which is coded by blocks (B 1 , B 2 , B 3 , B 4 ) and then decoded. In the method filtering is performed to...
7362363 Sensor device with sensor elements and read-out unit which reads partial measurements  
In a sensor arrangement, a number of sensor elements make measurements and a read-out unit reads measurements from the sensor elements. Images should be recorded in such a way that easily...
7107212 Bitstream data reduction coding by applying prediction  
A data processing apparatus for data processing an audio signal includes an input terminal ( 1 ) for receiving the audio signal, a 1-bit A/D converter ( 4 ) for A/D converting the audio signal to...
7079695 Digital image coding system having self-adjusting selection criteria for selecting a transform function  
In a digital signal processing system, a method for selecting a transform function to apply to an input signal based on characteristics of the signal, and for self-adjusting criteria which are used...
6912584 Media coding for loss recovery with remotely predicted data units  
An improved loss recovery method for coding streaming media classifies each data unit in the media stream as an independent data unit (I unit), a remotely predicted unit (R unit) or a predicted...
6907071 Selective prediction for intra-coding video data block  
In a method of video data compression a video frame in a sequence of frames is divided into a number of macroblocks, a particular macroblock being adjacent to a number of previously coded...
6898328 Method and apparatus for adaptive pixel estimation under high error rate conditions  
A method and apparatus for adaptive pixel estimation under high error rate conditions are disclosed. Classes are created, feasible classes are determined, and an optimal filter is applied to...
6831950 Encoding of two correlated sequences of data  
A first sequence [SQ 1 ] of data blocks [DB 1 -*] and a second sequence [SQ 2 ] of data blocks [DB 2 -*] are encoded. The second sequence [SQ 2 ] of data blocks [DB 2 -*] is correlated with the...
6765599 Image signal transmission apparatus  
An image-transmitting-side device comprises: a one-phase to two-phase converter circuit for separating parallel image data, which are to be transmitted, into even and odd data; a first...
6625215 Methods and apparatus for context-based inter/intra coding mode selection  
A technique is provided for use in a video processing system for selecting between an inter-frame coding mode and an intra-frame coding mode when processing a current portion of a video sequence....
6618446 Apparatus and method of data reconstruction  
Original data is reconstructed from an MPEG (Moving Picture Experts Group) bitstream including at least one elementary layer bitstream. The elementary layer bitstream is made of an upper layer...
6560287 Source coder and its coding method  
A source coder for video, compression Of H.261 and H.263 is disclosed, including a subtracter, a coding circuit, a predicting circuit, a picture memory with motion compensated variable delay and a...
6414717 Picture converting apparatus, picture converting method, learning apparatus, learning method, and record medium  
A picture reducing circuit 1 reduces a supplied original picture. An upper hierarchical level picture memory 2 stores an input upper hierarchical level picture. A predictive tap obtaining...
6335988 Method and apparatus for separating/generating background and motion object planes  
A transmitter which allows to reproduce a high quality and smooth dynamic image on the receiving side even with a transmission medium having a low transmission rate is provided. Background plane...
6320906 Motion vector detecting circuit  
In an animation encoding process, a motion vector which can minimize an AC component included in a discrete cosine transform result is detected. For this purpose, a block X (i, j) to be processed...
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...
6157676 Digital video signal inter-block interpolative predictive encoding/decoding apparatus and method providing high efficiency of encoding  
An image encoding apparatus for application to images expressed as respective frames of a digital video signal, whereby an image is converted into an array of blocks with specific blocks...
6148032 Methods and apparatus for reducing the cost of video decoders  
Methods and apparatus for implementing video decoders at a reduced cost are described. The methods include data reduction techniques, simplified inverse quantization techniques, and dynamically...
6043846 Prediction apparatus and method for improving coding efficiency in scalable video coding  
A prediction method, merged method, has been introduced in the enhancement layer of a multiple layer video coding. This merged method was designed to efficiently handle the prediction of the non...
5973745 Video signal encoding method, video signal encoding apparatus, video signal transmitting method, and recording medium  
In a video signal encoding method and apparatus, a video signal transmitting method, and the recording medium, hierarchical encoding of image data implies problems in that a compressing efficiency...
5970174 Method and apparatus for data compression and gray value estimation  
A method and apparatus for compression of data. The invention provides for the application of a plurality of compression schemes to the data such that improved compression ratios are achieved. A...
5966183 Signal converter and signal conversion method  
The present invention relates to a signal converter and a signal conversion method in which an interpolated image is formed on the basis of suitable classification according to features of an input...
5953064 Image signal encoding system capable of correctly encoding an editing image signal before and after switching time points of selection of input dynamic image signals  
An image signal encoding system which is capable of correctly encoding an editing image signal before and after switching points of a first input dynamic image signal and a second input dynamic...
5887061 Compression coding device with scrambling function and expansion reproducing device with descrambling function  
In a compression coding device having a scrambling function, a variable length coder outputs coded image data. When the image data are to be written to a memory included in a multiplexer, a...
5870148 Method and apparatus for adaptively enabling and disabling PB frames in an H.263 video coder  
A method and apparatus for adaptively enabling a PB frames mode for video data processing. If the PB frames mode is enabled for a given pair of video pictures, and if the motion compensated...
5870147 Predictive video signal coding and decoding with suppression of low frequencies  
In a predictive coding apparatus, an interframe/interfield predictive signal is generated in which low frequency components are depressed. A predictive error signal is generated on the basis of an...
5812219 System and method for transmitting picture or sound signals  
Due to a reduction of block artefacts in the reconstructed signal, lapped signal transforms are more suitable than non-lapped transforms for compressing picture and sound signals. Nevertheless, the...
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...
5724098 Interframe coding method and apparatus utilizing a filter controller and an adaptive filter  
An interframe coding system which eliminates higher frequency components contained in an image signal effectively and adaptively with an adaptive filter provided in a coding loop. The adaptive...
5719628 Video signal coding method and apparatus  
An efficient coding system for interlaced video sequences with forced refreshing capabilities. An input picture of is divided into two fields, a first and a second field. Certain lines or portions...
5706055 Motion compensated predictive picture production apparatus  
The invention provides a motion compensation predicted picture production apparatus which can produce a motion compensated predictive picture which includes minimized prediction errors. The motion...
5696849 Cascaded anti-aliasing filter control for sampled images  
A cascaded anti-aliasing filter control circuit for sampled images has a plurality of video effects modules coupled in a chain,. each module performing a particular transform of a cascaded video...
5696698 Device for addressing a cache memory of a compressing motion picture circuit  
A device for addressing a cache memory of a motion picture compression circuit, executing series of comparisons to estimate the motion of a current window of pixels of a current picture with...
5696791 Apparatus and method for decoding a sequence of digitally encoded data  
A method and apparatus of decoding a sequence of digitally encoded data. A sequence of digitally encoded data is received. If the digitally encoded data has a value indicative of a single...
5694179 Apparatus for estimating a half-pel motion in a video compression method  
An apparatus for estimating a half-pel motion comprising: a memory for storing motion-compensation errors in integer-pel positions; an address generator for generating an address of the integer-pel...
5659635 Image processing apparatus for compressing and decompressing image data  
An image processing apparatus for compressing and decompressing image data. The apparatus includes: a composition circuit for composing composed data, having a predetermined bit width, from the...
5543848 Method and apparatus for filtering and coding images based on characteristics of an input image signal  
An interframe coding system which eliminates higher frequency components contained in an image signal effectively and adaptively with an adaptive filter provided in a coding loop. The adaptive...
5506624 Rotating sample of video images  
A computer-implemented method of transmitting images from a transmitter to a receiver (e.g. in a teleconferencing application). A receiver maintains an image in a local storage (e.g. that from a...
5475432 Hibrid video signal encoder having a block rearrangement capability for better compressibility  
A hybrid coder, for performing interframe video encoding which combines the advantages of both the interfield and the interframe codings for low bit-rate video transmission; the pel elements of a...
5475446 Picture signal motion detector employing partial decimation of pixel blocks  
A reference picture signal is stored defining a plurality of image pixels of a reference picture. The input picture signal is divided into a plurality of input block signals each defining a...
5467134 Method and system for compressing video data  
A method for compressing video movie data to a specified target size using intraframe and interframe compression schemes. In intraframe compression, a frame of the movie is compressed by comparing...
5440721 Method and apparatus for controlling signal timing of cascaded signal processing units  
Each of the signal processing units of a digital signal processing system is provided with a programmable timing delay unit having identical programming interface to control the signal timing of...
RE34965 Inter-frame predictive encoding system with encoded and transmitted prediction error  
In an inter-frame predictive encoding system, reference frames are set. The reference frames are separated at equal intervals. The reference frames are selected from successively inputted frames of...
5416857 Apparatus and method for compressing data while retaining image integrity  
Apparatus and method for compressing sequentially related data while fully preserving the informational content of the data. In a preferred form, digital format video image data individualized by...
5396292 Encoding apparatus for motion video signals  
A subtracter (20) supplies a prediction error signal (21), derived from a prediction signal (101) and an input motion video signal (1). A quantizer (30) quantizes the prediction error signal to...
5396437 Motion detection method and its apparatus  
A motion detecting method and its apparatus are provided in which during a block matching procedure for detecting movement, error data in displacement between reference two-dimensional blocks and...
5377014 Apparatus and method for displaying recorded compressed digital high definition video information  
An apparatus provides digital data representative of a compressed high definition video image signal in a manner such that a conventional video tape recorder (VTR) employing current electrical and...
5363205 Image compressing method compressing an image into a compressed image and error coefficients  
An image compression method which successively diminishes in size the image to form a compressed image. The compression is done by dividing an image into partial areas with equal size, calculating...
5311307 Image processing method  
An image processing method in which an image signal of frames of pixel data is divided to provide a plurality of blocks and the step of dividing the image signal into blocks is comprised of the...
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