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Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Inventor:
Jung; Hae-Mook
Address:
Seoul, KR
No. of patents:
36
Patents:












Patent Number Title Of Patent Date Issued
6061401 Method and apparatus for selectively encoding/decoding a video signal May 9, 2000
A method and apparatus processes a video signal by selectively encoding and decoding a plurality of blocks included in the video signal. The encoding apparatus selects a plurality of processing blocks from a motion compensated error signal and decides position data of the processing
6020925 Method and apparatus for encoding a video signal using pixel-by-pixel motion prediction February 1, 2000
An apparatus, for use in a motion-compensated video signal encoder, for determining a predicted current frame based on a current frame and a previous frame of a digital video signal, including: a unit for selecting a number of pixels from the pixels contained in the previous frame; a uni
5978030 Method and apparatus for encoding a video signal using feature point based motion estimation November 2, 1999
An apparatus for encoding a digital video signal to reduce a transmission rate of the digital video signal, which comprises a feature point based motion compensation circuit for selecting a set of feature points from the reconstructed reference frame to detect a set of motion vectors bet
5926231 Method and apparatus for detecting motion vectors based on hierarchical motion estimation July 20, 1999
Motion vectors are determined between a current frame and a preceding frame within a frame duration by employing a time-sharing multi-tier hierarchical motion estimation approach, wherein the candidate blocks being grouped into a multiple number of hierarchical search areas. The moti
5845012 Apparatus for encoding an image signal having a still object December 1, 1998
An apparatus, capable of improving the overall coding efficiency by encoding an image signal having a still object based on an improved object oriented coding technique, comprises a first detector for detecting a contour image signal placed at the boundary of the object within the image
5825423 Apparatus for detecting motion vectors using moving object patterns October 20, 1998
An apparatus for estimating motion vectors between a current frame and a reference frame of video signals employs a set of moving object patterns, each of the, moving object patterns representing a predetermined pattern of movement for at least one moving object and comprises; unit for s
5808685 Block matching motion estimation apparatus employing a weight function September 15, 1998
A blocking matching motion estimation apparatus estimates a displacement of a search block in a current frame with respect to each of candidate blocks in a previous frame to produce motion vectors and error signals representing the similarity between the search block and a candidate
5805226 Method and apparatus for encoding a video signal by using a block truncation coding method September 8, 1998
A method for encoding a block of video signal which includes a plurality of frames, each of the frames is divided into a multiplicity of nonoverlapping blocks and each of the blocks contains K.times.K pixels, K being a positive integer. The method determines two reconstruction values
5790207 Motion compensation method for use in an image encoding system August 4, 1998
A method capable of improving the image quality comprises the steps of (a) detecting a motion vector for each search block in the current frame by using a block matching algorithm, (b) dividing a search block into a central region positioned at the center of the search block and a bounda
5767909 Apparatus for encoding a digital video signal using an adaptive scanning technique June 16, 1998
An apparatus for encoding a digital video signal to provide a digitally coded video signal comprises a source coder for generating a set of quantized transform coefficients corresponding to each of the coding blocks, a scanning order determination block for adaptively determining a s
5754237 Method for determining motion vectors using a hierarchical motion estimation May 19, 1998
A method for determining motion vectors by employing a multi-tier hierarchical motion estimation comprises (a) motion-estimating each of the hierarchical search blocks of a processing block with respect to a corresponding hierarchical search region to thereby provide motion vectors a
5748761 Method for segmenting and estimating a moving object motion May 5, 1998
A method for use in an object-oriented analysis-synthesis coder, for segmenting an image of a current frame into moving objects and describing each motion of the moving objects with a set of motion parameters, which comprises the steps of: (a) comparing the current frame with a preceding
5748244 Adaptive runlength coding based on zero and non-zero subblocks May 5, 1998
A method, for use in a video signal encoding system, for processing a block of quantized transform coefficients first divides the block of quantized transform coefficients into a predetermined number of subblocks and detects one or more non-zero subblocks, each of the non-zero subblocks
5742342 Apparatus for encoding an image signal using vector quantization technique April 21, 1998
A digital video signal encoder includes a discrete cosine transform and quantization circuit for generating a set of quantized transform coefficients corresponding to each of the coding blocks. The set of quantized transform coefficients is divided into a first and a second subsets o
5734737 Method for segmenting and estimating a moving object motion using a hierarchy of motion models March 31, 1998
A method, for use in an object-oriented analysis-synthesis coder, for segmenting an image signal into moving objects contained in a current frame and describing each motion of the moving objects with a set of motion parameters using a multi-stage segmentation comprises the steps of:
5731851 Method for determining feature points based on hierarchical block searching technique March 24, 1998
A novel method for determining feature points comprises the steps of detecting edge points from the video frame; selecting, as a processing block, a block having a maximum number of edge points within said each search region; dividing the processing block into a number of candidate b
5717470 Method and apparatus for detecting optimum motion vectors based on a hierarchical motion estimat February 10, 1998
Motion vectors are determined between a current frame and a preceding frame within a frame duration by employing a multi-tier hierarchical motion estimation approach, wherein the candidate blocks are grouped into a multiple number of hierarchical search areas. Candidate blocks contained
5710838 Apparatus for encoding a video signal by using modified block truncation and contour coding meth January 20, 1998
An apparatus for encoding a input video signal having a plurality of video frames each of which may be divided into a multiplicity of non-overlapping blocks of K.times.K pixels by using a modified BTC method and a contour coding method, with the apparatus including a masking block for pr
5706366 Apparatus for encoding an image signal having a still object using an image warping technique January 6, 1998
An apparatus for encoding an image signal having a still object generates a first encoded image signal by encoding a contour signal detected at a first encoding channel, the contour signal providing boundary information for tracing an object boundary in a video frame. The video frame is
5701368 Apparatus for encoding an image signal having a still object December 23, 1997
An apparatus for encoding a digital video signal of an image based on a still object-oriented coding technique wherein the image signal is divided into a number of blocks of an identical size and pixels lying outside of the object being masked with a zero value comprises a subblock forma
5699122 Method and apparatus for encoding a video signal by using a modified block truncation coding met December 16, 1997
A video signal is encoded to provide a coded video signal, wherein a frame of the video signal is divided into a multiplicity of nonoverlapping blocks and each of the blocks contains K.times.L pixels, K and L being positive integers, by the steps of: dividing K.times.L pixels included in
5689306 Method and apparatus for encoding a video signal using pixel-by-pixel motion prediction November 18, 1997
An apparatus for determining a preducted current frame based on a current frame and a previous frames comprises: a unit for selecting a number of pixels from the pixels contained in the previous frame to detect a first set of motion vectors; a unit for producing a second set of motion ve
5654761 Image processing system using pixel-by-pixel motion estimation and frame decimation August 5, 1997
An image processing system for processing a video signal has an encoder and a corresponding decoder wherein the encoder includes a frame decimator; a current frame prediction block for estimating displacements between a previous and a current frames provided from the frame decimator, and
5640420 Variable length coder using two VLC tables June 17, 1997
A digital video signal encoder for coding a block of a digital video signal first converts the block of the digital video signal into a set of quantized transform coefficients having a low and a high frequency zones and scans the set of quantized transform coefficients to produce a first
5633685 Method and apparatus for encoding an image signal having an object by using an extension-interpo May 27, 1997
A processing block is processed by using an extension-interpolation ("E-I") method, wherein the processing block consisting of N.times.N pixels which are classified into object pixels and background pixels and the E-I method comprises the steps of: (A) selecting L rows of the processing
5619281 Method and apparatus for detecting motion vectors in a frame decimating video encoder April 8, 1997
An improved motion estimating method serves to determine a set of target motion vectors between a current frame and its previous selected frame, wherein N number of frames are skipped between the current frame and the previous selected frame, said N being a positive integer inclusive of
5614954 Motion compensation apparatus for use in an image encoding system March 25, 1997
An apparatus for improving image quality comprising a converter for converting the B frame into a converted frame having a second set of search blocks wherein both the B frame and the converted frame have an overlapping region; a first predictor for estimating a first displacement ve
5596370 Boundary matching motion estimation apparatus January 21, 1997
An apparatus for determining a motion vector representing a displacement between a current frame and a previous frame of video signals comprises an error detector for comparing the error functions calculated from block matching sections to each other and selecting M number error function
5583580 Method and apparatus for detecting motion vectors based on hierarchical motion estimation December 10, 1996
Motion vectors are determined between a current frame and a preceding frame within a frame duration by employing a time-sharing multi-tier hierarchical motion estimation approach, wherein the candidate blocks being grouped into a multiple number of hierarchical search areas. The moti
5579050 Apparatus for encoding a video signal using a search grid November 26, 1996
An apparatus used in a motion-compensated video signal encoder for determining a predicted current frame based on a current frame and a previous frame of a digital video signal using a predetermined number of search grids, each search grid being a set of search blocks formed in the c
5561475 Variable block matching motion estimation apparatus October 1, 1996
An apparatus for detecting motion vectors between a current frame and a previous frame of video signals based on a block matching motion estimation approach comprises a variable block formation section for defining a variable search block from the current frame, the variable search b
5539469 Apparatus for determining motion vectors through the use of an adaptive median filtering techniq July 23, 1996
An apparatus for determining motion vectors 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, an edge detector for detecting edge positions of an object in the current
5534930 Method for constructing a quantization pattern codebook July 9, 1996
A quantization pattern codebook is prepared by way of: merging each pair of pattern clusters into a merged pattern cluster until all combinable pairs of the pattern clusters are merged to derive a set of merged pattern clusters; calculating the rate of bit increment by subtracting the to
5510856 Apparatus for determining motion vectors April 23, 1996
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 motion vectors of the pixels, a majo
5502492 Motion vector detection apparatus March 26, 1996
An apparatus for determining motion vectors between a current frame and a previous frame of digital video signals apparatus comprises a subblock motion vector detector for detecting a subblock motion vector for each of the subblocks included in a panning block within the current frame; a
5247353 Motion detection system for high definition television receiver September 21, 1993
A motion area detector capable of simple detection of a moving picture-area in a HDTV receiver of a multiple subsampling transmission system is disclosed. The motion area detector includes a still-picture processor for reproducing a still picture from a picture signal applied into the










 
 
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