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| Number | Title | Issue Date |
| 5546129 | Method for encoding a video signal using feature point based motion estimation A method for adaptively selecting feature points according to motions of objects between the current frame and the previous frame, comprising the steps of: subtracting a pixel value of the previous frame from a pixel value of the current frame to thereby ... | 08/13/1996 |
| 5544263 | Motion vector calculation circuit, with flatness-judgement circuitry, that selects a generated motion vector for output in accordance with a flatness judgement result A circuit calculates motion vectors for use in compressing a motion picture signal. The motion picture signal is divided into portions, each portion representing a picture. The portions include a current portion representing a current picture. The current... | 08/06/1996 |
| 5541660 | Systolic realization of motion compensated interpolation filter A motion compensated interpolation filter calculates an interpolated frame between two input frames of video signals having moving objects therein. The interpolation filter includes two 2-dimensional filter which are identical in structure. Each of the 2-... | 07/30/1996 |
| 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. Two-dimensional Fourier transform convolution techniques form a basis fo... | 07/09/1996 |
| 5521642 | Decoding system for compact high definition television receivers A simplified decoding system for providing a reduced image frame to a high definition television receiver with a small size screen through the use of d.c. transform coefficients. The decoding system selectively decodes and inverse quantizes d.c. transform... | 05/28/1996 |
| 5512952 | Picture signal encoding and/or decoding apparatus Apparatus for compressing a motion picture signal divided into blocks, in which circuits perform the following operations: subtracting the blocks of the motion picture signal from corresponding prediction blocks of a prediction picture to provide predicti... | 04/30/1996 |
| 5512962 | Motion vector detecting apparatus for moving picture A motion vector detection apparatus for a moving picture which can detect a motion vector of a half pel accuracy at a high speed by pipeline processing. The motion vector detection apparatus comprises a buffer memory for storing pel data of a search area ... | 04/30/1996 |
| 5510839 | Image encoding and transmitting system An image encoding and transmitting system is an image transmission system for transmitting digital data such as TV telephones. The system for dividing input frame data into a plurality of blocks before transmitting them comprises on its sending side an in... | 04/23/1996 |
| 5510856 | Apparatus for determining motion vectors An apparatus for determining motion vector for pixels of a current frame which includes a number of processing blocks comprises a motion estimator for providing motion vectors for the pixels in the current frame, a median filter for providing filtered mot... | 04/23/1996 |
| 5508744 | Video signal compression with removal of non-correlated motion vectors A video signal compressor includes apparatus for generating motion vectors for respective blocks of video data. Motion vectors, other than those which provide direction to co-located blocks in other frames, are determined to be candidates for conversion t... | 04/16/1996 |
| 5508745 | Apparatus for controlling a quantization level to be modified by a motion vector A motion vector calculating device receives horizontal and vertical components of a motion vector and calculates the magnitude of the motion vector. A motion estimating device then compares the magnitude of the motion vector with stored reference values. ... | 04/16/1996 |
| 5506622 | Block matching type motion vector determination using correlation between error signals An improved method for determining optimum motion vectors of video signals employs a similarity measurement between a search block in a current frame and each of a plurality of candidate blocks included in a corresponding search region in a previous frame... | 04/09/1996 |
| 5504529 | Video signal coding apparatus and decoding apparatus A video signal is coded by intraframe coding. The coded video signal is then decoded by intraframe/field decoding. A decoded local video signal is generated which corresponds to a specific region in one frame of a video signal coded one frame prior to the... | 04/02/1996 |
| 5502493 | Variable length data decoder for use with MPEG encoded video data The present invention is embodied in a decoder for a video signal encoded according to the standard proposed by the Moving Pictures Expert Group (MPEG) of the International Standards Organization (ISO). This decoder employs four sets of processors, each s... | 03/26/1996 |
| 5502483 | Video camera apparatus The present invention relates to a video camera apparatus which can automatically correct an image vibration, such as a handling or the like electronically. A control circuit changes an interpolation coefficient of an interpolation processing circ... | 03/26/1996 |
| 5502510 | Method for temporal filtering of video signals using a motion adaptive spatial filter A motion adaptive spatial filtering method is employed as a prefilter in an image coding apparatus, which processes the temporal band-limitation of a video signal without temporal aliasing by using a spatial filter having a band-limitation characteristic ... | 03/26/1996 |
| 5491523 | Image motion vector detecting method and motion vector coding method In a motion vector detection method for detecting motion vectors for respective blocks divided from an image frame, a motion vector is detected for a block of a luminance signal forming the image frame together with at least one chrominance signal, a refe... | 02/13/1996 |
| 5488482 | High-efficiency encoder and video information recording/reproducing apparatus In a high-efficiency encoder which performs motion-compensation prediction, an intra-field is set every n fields. The presence of a scene change is detected. When a scene change occurs, a reference picture of motion-compensation prediction is switched, or... | 01/30/1996 |
| 5485210 | Digital advanced television systems Television images are decoded by forming a predicted current image frame, receiving and decoding a quantized subband-represented residual frame, and reconstructing a current frame by combining the decoded residual frame and a fraction of the predicted cur... | 01/16/1996 |
| 5485224 | Motion compensated video signal processing by interpolation of correlation surfaces and apparatus for doing the same Motion compensated video signal processing apparatus, in which motion vectors are generated to represent image motion between a pair of input images of an input video signal, comprises means for comparing search blocks within one of the pair of input imag... | 01/16/1996 |
| 5485211 | Multiple encoder output buffer apparatus for differential coding of video information Feedback is introduced between a video CODEC and the intended communications channel such that the characteristics of the channel are used to drive multiple video output buffers. These multiple output buffers share an original temporal video reference, bu... | 01/16/1996 |
| 5481553 | Methods and apparatus for preventing rounding errors when transform coefficients representing a motion picture signal are inversely transformed Mismatch errors occur in the local decoder of a MPEG-standard compressor for a motion picture signal, and in an MPEG-standard expander for a compressed motion picture signal. This is because of the lack of a standard for rounding results of *0.5 (* is an ... | 01/02/1996 |
| 5479211 | Image-signal decoding apparatus An image-signal decoding apparatus decodes moving-picture data compressed by orthogonal transform, quantization, and variable-length coding for each block. A variable-length code decoding circuit decodes the compressed moving-picture data and outputs the ... | 12/26/1995 |
| 5473379 | Method and apparatus for improving motion compensation in digital video coding A novel method and apparatus for use in digital video compression provides improved block-based motion compensation using the global motion of a video frame. A video frame comprising a plurality of blocks may be compressed for transmission using block mot... | 12/05/1995 |
| 5469517 | Motion compensation circuit A motion compensation circuit comprises finite impulse response (FIR) filters divided into N groups according to N subbands of input video signal samples. One of the FIR filters of each group receives a delayed version of the subband of the group, and the... | 11/21/1995 |
| 5469226 | Video signal processing to derive motion vectors representing motion between successive fields or frames A method of processing a digital video signal to derive motion vectors representing motion between successive fields or frames of the video signal comprises compares the contents of blocks of pixels in a first field or frame of the video signal with the c... | 11/21/1995 |
| 5467135 | Apparatus and method for moving picture coding A method of coding image data with coefficients between fields by increasing the coefficients prior to coding comprising the steps of: (1) detecting a motion vector in a reference field to a sample field to check whether the reference field is zoomed in o... | 11/14/1995 |
| 5457496 | Digital image communication apparatus Encoding and decoding systems for a digital image communication apparatus suppresses any reduction in the encoding efficiency due to leaky prediction. A range correcting unit (3) corrects the range of data of a preceding frame stored in a memory (1) accor... | 10/10/1995 |
| 5457780 | System for producing a video-instruction set utilizing a real-time frame differential bit map and microblock subimages The present invention pertains to integrated circuit system based on novel architecture of Video-Instruction-Sec-Computing (VISC). The integrated circuit comprises a plurality of functional units to independently execute the tasks of remote communication,... | 10/10/1995 |
| 5457481 | Memory system for use in a moving image decoding processor employing motion compensation technique A memory apparatus for use in a receiver for decoding video signals comprises a first memory for storing an image frame; a second memory for storing current pixel data temporally and providing the same to said first memory; an address generator for genera... | 10/10/1995 |
| 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 circuitry for detecting transmitted video data, generating erro... | 10/03/1995 |
| 5453801 | Method and apparatus for detecting motion vectors in a frame decimating video encoder An improved motion estimating method serves to determine a set of target motion vectors between a current and its previous selected frames, wherein N number of frames are skipped between the current and the previous selected frames, the N being a positive... | 09/26/1995 |
| 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 bitstream into cells of bits and adds to the cells positional inf... | 09/26/1995 |
| 5452377 | Moving vector detecting device A motion vector detecting apparatus using the minimum residual difference between corresponding picture elements from two consecutive frames and an interpolation circuit to develop a moving vector with half-picture-element pitch accuracy. A residual diffe... | 09/19/1995 |
| 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 limited to subimages of the video images as defined by bou... | 07/25/1995 |
| 5436664 | Method for masking transmission errors of MPEG compressed pictures A method masks errors in a transmission system of a picture sequence including a first series of pictures that are autonomously coded by pixel blocks (intra coding). Each picture of the first series is followed by several pictures of a second series of pi... | 07/25/1995 |
| 5430479 | Moving vector extractor A moving vector extractor for detecting a shaking of an image through a video camera in order to improve accuracy of the detection. Even when the image is dark or of low density gradient as a whole, a density gradient value around representative point is ... | 07/04/1995 |
| 5428396 | Variable length coding/decoding method for motion vectors In connection with compression-coding of video signals on the basis of inter-frame correlation, a single reference table is used for variable length encoding of inter-frame motion vectors established on the basis of various motion vector value ranges and ... | 06/27/1995 |
| 5428693 | Motion compensation predicting coding method and apparatus A motion compensation predicting coding apparatus includes a motion detector for comparing pixel data in an image signal with pixel data of the previous image signal to generate a motion vector. The motion vector is indicative of the displacement differen... | 06/27/1995 |
| 5421023 | Motion vector calculation method using sequential minimum distortion calculations at different densities The present invention improves a digital signal processor, more particularly, calculation methods for motion compensation in reduceing a required amount of calculations when an amount of distortion between a last frame block and a current frame block; in ... | 05/30/1995 |
