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6650783 |
Image processing apparatus and method for processing images with different scalabilites
A single base layer is formed by reducing information of input image data with at least a plurality of scalable factors, and a plurality of enhancement layers having information associated with a...
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6650708 |
Video signal encoding apparatus
A video signal encoding apparatus for enlarging a video signal by subjecting it to a coding process. The apparatus, using m×n blocks (m, n: natural number) as the unit block for coding a motion...
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6647062 |
Method and apparatus for detecting motion and absence of motion between odd and even video fields
A method and apparatus are provided whereby the motion between two video fields of opposite parity may be measured so as to discriminate between the presence of motion and lack thereof. The level...
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6643325 |
Video signal processing
Video signal processing apparatus in which at least two input video signals are combined in proportions determined by a pixel key signal to generate an output video signal for compression, at least...
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6643409 |
Coded image recording medium
A recording medium has recorded thereon information related to coded data of an image sequence, which is a set of coded frame information of a plurality of frames of an image sequence. The coded...
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6633612 |
Method and apparatus for detecting motion between odd and even video fields
A method for measuring motion at a horizontal and vertical position between video fields of opposite parity comprising the steps of measuring the signal values of at least two vertically adjacent...
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6633611 |
Method and apparatus for region-based moving image encoding and decoding
In partitioning and encoding an image into multiple regions, the degree of freedom of the region shape has generally been low and setting regions based on image features was difficult. A moving...
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6631214 |
Image coder and image coding method
An image coding method includes the steps of synthesizing a prediction image by performing motion compensation, and multiplexing information related to a difference image between an input image and...
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6628713 |
Method and device for data encoding and method for data transmission
The present invention generates coded data having always high image quality irrespective of the change amount of a picture. When a difference between two adjacent frames in inputted picture data is...
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6628715 |
Method and apparatus for estimating optical flow
An apparatus for generating an image motion vector field which describes a motion of individual image components of a first image frame and corresponding image components of a second image frame in...
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6628714 |
Down converting MPEG encoded high definition sequences to lower resolution with reduced memory in decoder loop
An MPEG encoded interlaced high definition video stream is decoded and down converted to lower resolution by an MPEG decoder with a reduced amount of reference picture memory. Received frame and...
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6625214 |
Apparatus and method for fade detecting and information encoding
An fade detection device detects fade transitions in a image data signal used for image data compression provided with: an inter-frame difference calculation device calculates the absolute value of...
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6625216 |
Motion estimation using orthogonal transform-domain block matching
A block matching system matches a motion block in one video image frame to a matching block another video image frame. The system includes a plurality of Hadamard transform processors which...
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6621864 |
Motion vector based frame insertion process for increasing the frame rate of moving images
A video decoding and display system uses temporal post-processing to smooth motion in a displayed moving image. The temporal post-processing uses motion vectors each of which indicates visually...
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6621865 |
Method and system for encoding and decoding moving and still pictures
A multi-dimensionally layered encoding and decoding system having reduced the bandwidth requirements for a channel that carries an image stream encoded by the system. A source image stream is...
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6618441 |
Motion vector detection apparatus
An object of the present invention is to implement a motion vector detection apparatus capable of drastically shortening the processing time required for detection of a motion vector between...
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6618439 |
Fast motion-compensated video frame interpolator
A block-based motion-compensated frame interpolation method and apparatus using a block-based video coder operating in low bit rates. Smooth movement of objects between video frames can be obtained...
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6614846 |
Method and apparatus for transmitting, encoding and decoding video signal and recording/reproducing method of optical disc
The present invention includes a motion vector detector for detecting motion vectors using a first image signal of high resolution; a resolution reducer for creating a second image signal of low...
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6614847 |
Content-based video compression
A video compression method and system including object-oriented compression plus error correction using decoder feedback.
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6611560 |
Method and apparatus for performing motion estimation in the DCT domain
A motion vector between a current block and a reference block of a reference frame is determined by calculating the exact linear cross-correlation between the current block and the potential...
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6611559 |
Apparatus and method of detecting motion vectors by calculating a correlation degree between each candidate block
In order to realize a picture compression processing with a higher efficiency than ever in motion vector detection for motion picture compression coding, an improvement is provided to motion vector...
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6608866 |
Digital video processing
A digital video processing system and method for deriving an output compressed video signal from an input compressed video signal. The input compressed video signal represents successive input...
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6606419 |
Computer-readable medium having image decoding program stored thereon
A computer-readable medium having stored thereon an image decoding program which, when executed by a computer, performs the steps of extracting motion vector information and quantized DCT...
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6597737 |
Motion determining apparatus, method thereof, and picture information converting apparatus
A motion determining apparatus for detecting a motion of a partial picture of an input picture signal is disclosed, that comprises a first motion detecting portion for comparing a frame difference...
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6597738 |
Motion descriptor generating apparatus by using accumulated motion histogram and a method therefor
A motion descriptor generating apparatus using accumulated motion histogram and a method therefor. Accumulated motion histograms are generated and motion descriptors are generated by using the...
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6594312 |
Method and apparatus for motion estimation quantization dithering
A method and apparatus that reduce the complexity of motion estimation while providing better quality for a particular level of reduced resolution than previously available are described. The...
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6594314 |
Motion vector detection method and apparatus
In a motion vector detection method for detection the motion vector of a field picture conforming to the interlaced scanning system, a motion vector of a second field picture is detected in a...
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6594313 |
Increased video playback framerate in low bit-rate video applications
A method comprising selecting a number of blocks of a frame pair and synthesizing an interpolated frame based on those selected blocks of the frame pair. Additionally, the synthesis of the...
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6590934 |
Error concealment method
A method for concealing an error in a motion picture compression/restoration device is disclosed. In the present invention, a damaged macro block is restored by predicting an optimal motion vector...
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6590607 |
Method and apparatus for storing an uninterrupted digital video stream
A method and apparatus for storing an uninterrupted digital video stream using a motion-sensitive memory system involve monitoring the acceleration experienced by the memory system and adjusting...
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6590937 |
Efficient motion vector detection
A reference block is divided in the horizontal direction into small blocks, and is also divided in the vertical direction into small blocks. Feature values representing each of the small blocks...
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6584155 |
Method and system for estimating motion vector
The correlation between a coded block on the screen of the current image and a plurality of candidate blocks which exist in a search area on a reference screen temporally different from the current...
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6584212 |
Apparatus for motion estimation with control part implemented by state transition diagram
An apparatus for motion estimation with control part implemented by state transition diagram without adding delay circuits to processing elements, and capable of maintaining a regular data flow and...
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6580758 |
Method of coding images at very low data rate and coding/decoding device implementing this method
A method and apparatus for differential coding of blocks of images includes coding the difference between a current block of an image to be transmitted and one of four blocks of the reconstructed...
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6567557 |
Method for preventing dual-step half-pixel motion compensation accumulation errors in prediction-rich MPEG-2 sequences
A two-step motion prediction for MPEG-2 interpolation case-D will yield visual artifacts if not corrected. An improved MPEG-2 decoder includes a logic gate, multiplexer, and adder. When both the...
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6567469 |
Motion estimation algorithm suitable for H.261 videoconferencing applications
A method for identifying an optimum motion vector for a current block of pixels in a current picture in a process for performing motion estimation. The method is implemented by evaluating a...
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6567468 |
Motion detection circuit and a noise suppressing circuit including the same
In a motion detection circuit, a difference signal between the video and one-frame delayed video signals is generated. An Edge signal is generated from the video and delayed video signals. Motion...
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6563873 |
Video signal processing
In a video signal processing method, video signal parts are labeled (L) as non-matchable parts (N-M) if reliable motion or depth information (d 1 , d 2 ) cannot be obtained for such parts (N-M),...
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6560367 |
Image decoder and image decoding method
An image decoding method includes the steps of storing a reference image which is an image previously decoded based on a first prediction image synthesized by performing motion compensation,...
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6560286 |
Field frame motion design for digital video decoder
A method and apparatus for improved processing of digitized moving pictures. A motion vector for field frame processing is produced using fewer pixels from the source image and fewer coefficients...
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6560284 |
Video coder/decoder
Coding and decoding of video images includes the use of multiple reference pictures and determining motion vector and time delay information for the video images. Video images are quantized and...
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6549576 |
Motion vector detecting method and apparatus
A current image is supplied to a current image input circuit 10. Also, a reference image is inputted to a reference image input circuit 11. A search range setting circuit 12 sets a search...
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6549668 |
Detection of a 3:2 pulldown in a motion estimation phase and optimized video compression encoder
A method for compressing encoding data of a sequence of pictures is based on a motion estimation among the successive images to remove the temporal redundancy from the data. The method recognizes a...
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6549575 |
Efficient, flexible motion estimation architecture for real time MPEG2 compliant encoding
Temporal compression of a digital video data stream with hierarchically searching in at least one search unit for pixels in a reference picture to find a best match for the current macroblock. This...
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6539055 |
Scene change detector for video data
A viewer-intuitive index may be built from a stream of video data by detecting scene changes from the stream of video data, capturing reference markers associated with the video data for those...
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6532265 |
Method and system for video compression
A method of determining the motion vector of a block of a video frame with respect to a reference video frame. The video frame and reference video frame comprising pixels, wherein each pixel has a...
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6532264 |
Processing sequential video images to detect image motion among interlaced video fields or progressive video images
Video images are processed to detect image motion among sequential images (e.g., progressive non-interlaced images of a video signal and/or interlaced fields of a video signal), each image being...
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6526099 |
Transcoder
In a transcoder means are provided for implementing a simultaneous change in rate and in resolution. In a preferred embodiment means are also provided for transferring incoming motion vectors or...
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6526096 |
Video coding system for estimating a motion vector field by using a series of motion estimators of varying complexity
A motion estimation system for a video coder has an input for a video image to be coded, and includes a series of motion estimators of varying complexity for estimating a motion vector field...
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6519287 |
Method and apparatus for encoding and decoding video signals by using storage and retrieval of motion vectors
A system ( 10 ) which encodes and decodes video signals in accordance with a compression standard, such as H.263, efficiently stores and retrieves motion vectors associated with the signals. An...
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