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6510177 |
System and method for layered video coding enhancement
A system and a method for encoding, transmitting, decoding and storing a high-resolution video sequence using a low-resolution base layer and a higher-resolution enhancement layer. The base layer...
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6507618 |
Compressed video signal including independently coded regions
In a MPEG or other video system, regions of each frame may be independently coded for later, independent extraction directly from a compressed bit stream. An encoder/transcoder receives raw video,...
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6507617 |
Video coding
This invention relates to a system for compression of video sequences that is using motion compensated prediction. The key part of such system is motion vector field coding. The goal of motion...
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6501799 |
Dual-prime motion estimation engine
An apparatus performs motion estimation based on an average of previous field references in a flexible, yet high performance manner. The apparatus has a command memory for storing a motion...
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6501796 |
Method and device for video compression
The invention relates to a process for compressing digital data of a sequence of synthesis images describing a scene which is the subject of a script, comprising a processing step for modelling the...
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6501800 |
Variable bit-rate encoding device
A variable bit-rate encoding device is provided that can perform a variable bit-rate encoding process at high rate. The subtracter 103 calculates a predictive error between compressed frame data...
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6501794 |
System and related methods for analyzing compressed media content
A method comprising receiving media data in a compressed, digital domain, analyzing motion vectors associated with the received media content while in the compressed digital domain and identifying...
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6498815 |
Method and arrangement for video coding
A hybrid video encoder which carries out motion estimation and compensation ( 8 ) in the transform domain. In such an encoder, the calculation of a prediction block (Ŷ) from previously encoded...
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6498810 |
Method for motion vector coding of MPEG-4
A method for motion vector coding of an MPEG-4 includes determining motion vector candidates, and selecting a candidate having a minimum bit rate among motion vector candidates in an encoder. A...
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6496539 |
Method and apparatus for detecting motion
There is disclosed a method and apparatus for detecting motion by a video encoder. The method starts with dividing a target block whose motion is to be detected into blocks at different pixel...
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6496538 |
Method and apparatus for motion estimation for digital video encoding
A method for determining motion estimation in a set of video frames including the comparing of a first macroblock from a video frame in the set of video frames to a second macroblock in a reference...
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6493390 |
Motion compensation image encoding device
A motion detecting device for enhancement of the image quality at ultra-low bit rates is disclosed, which permits quantization of the prediction error with the highest possible degree of accuracy,...
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6489996 |
Moving-picture decoding method and apparatus calculating motion vectors to reduce distortion caused by error propagation
A moving picture coded by inter-frame coding, with motion compensation, is decoded by an apparatus that stores at least two previously decoded frames, together with information identifying any...
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6490322 |
Digital opaque projector for easy creation and capture of presentation material
A method for managing a frame of data includes capturing the frame of data from an image at a location. It is determined whether the image is a new image. The frame of data is displayed if the...
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6489995 |
Method and apparatus for motion vector concealment
An innovative method and apparatus for decoding an encoded image such as a video. In one embodiment a method for decoding an encoded block of an image, e.g.,a video frame, having an error in its...
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6483876 |
Methods and apparatus for reduction of prediction modes in motion estimation
In image encoding methods or systems, first and second motion vectors are determined for the two fields comprising a frame based on a field search. The first and second motion vectors then may be...
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6480544 |
Encoding apparatus and encoding method
In an encoding apparatus for processing a video signal with a signal processing circuit, producing coefficient data by an orthogonal transform of differential data obtained by motion compensation,...
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6480543 |
Detection of a change of scene in a motion estimator of a video encoder
The compression and coding of digital data pertaining to video sequences of pictures including motion estimation for removing temporal redundance are provided by recognizing the occurrence of a...
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6477279 |
Image encoding and decoding method and apparatus using edge synthesis and inverse wavelet transform
A digitized image is encoded by detecting edges in the image, encoding the position and sharpness of the detected edges, filtering the image by a low-pass filter to generate a low-frequency image,...
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6473460 |
Method and apparatus for calculating motion vectors
A motion estimation system for finding motion vectors between first and second images selects first and second overlapping blocks of pixels from the first image. The motion estimation system then...
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6473461 |
Half-pixel motion estimation in motion video signal encoding
A motion estimator/compensator determines whether to use half-pixel motion vector encoding by comparing the relative benefit of using half-pixel encoding, represented in terms of distortion between...
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6473462 |
Process for estimating a dominant motion between two frames
The process for estimating a dominant motion between two frames combines a phase correlation peak detection algorithm ( 1 ) and a multi-resolution robust regression algorithm ( 3 ) for improving...
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6473459 |
Scene change detector
A coding parameter extracting unit extracts predictive-coded mode information, motion vectors, and coded transformed coefficients from video-signal-demultiplexed information. An abrupt scene change...
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6470050 |
Image coding apparatus and its motion vector detection method
The present invention provides an image coding apparatus and its motion vector detection method, which can reduce a system cost also when the throughput of image data is increased. The image coding...
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6466696 |
Deriving polygonal boundaries from quadtree representation
A method of conversion of a quadtree representation of image data into a corresponding representation of edges of regions within the image is disclosed. In one configuration the method comprises...
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6466623 |
Method and apparatus for motion estimation for high performance transcoding
Methods and systems for generating motion vectors for re-encoding video signals are disclosed. The motion vector is determined by the sum of a base motion vector and a delta motion vector. In the...
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6462785 |
Motion display technique
When there is an inability to convey motion that is occurring in the frames of a video source by a full-frame-rate transmission, a surrogate effect, other than another form of motion, may be used...
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6462791 |
Constrained motion estimation and compensation for packet loss resiliency in standard based codec
The present invention discloses a method and apparatus for transmitting a plurality of images of at least over a packet network. A plurality of motion vectors based on at least one moving object is...
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6459452 |
System, method, and apparatus for decoding digital video sequences
A system, method, and apparatus are disclosed that support decoding of motion-compensation-encoded digital video sequences while having reduced storage requirements.
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6459734 |
Motion detection circuit and a noise suppression circuit including the same
An interframe difference signal is generated from the video signal and its one-frame delayed video signal. A filter removes a carrier color signal from the interframe difference signal to output...
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6456660 |
Device and method of detecting motion vectors
A motion vector detection device is provided that can suitably detect motion vectors by setting an optimum search range of vector values of a motion vector. The motion vector detection section 103...
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6456659 |
Motion estimator algorithm and system's architecture
A motion estimator operating on a recursive mode reduces the number of operations per pixels required by the particular coding process being implemented. The coding process includes the MPEG...
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6456661 |
Method of transcoding coded digital signals and corresponding transcoder
By inserting a downsampling filter between the decoding and re-encoding parts of a transcoder, a reduced resolution transcoding is performed. Before transferring the decoded motion vectors to the...
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RE37858 |
Motion compensation predicting encoding 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....
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6449311 |
Methods and apparatus for error concealment utilizing temporal domain motion vector estimation
A method and apparatus for concealing errors during decoding of a video bit stream utilize estimates, if possible, motion vectors in the temporal domain. If estimation in the temporal domain is not...
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6449312 |
Method of estimating motion in interlaced video
A method of estimating motion in interlaced video involves, firstly, a frame search ( 61 ), where a search is conducted for the frame structure using a sub-sampled block matching metric (e.g....
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6445741 |
Motion estimation
In a method of estimating motion vectors from subsampled video data (I), first vectors are estimated (ME, PM 2 ) between an image with a first sub-sampling phase and an earlier image sub-sampled...
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6445742 |
Method and apparatus for transmitting and recovering video signal
A method and an apparatus for transmitting and recovering a video signal are provided. The method for transmitting a video signal that has a hierarchical structure of a frame, groups of blocks...
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6442204 |
Video encoding method and system
In the Improved PB-frames mode, one of the options of the H.263+ Recommendation, a macroblock of a B-frame may be encoded according to a forward, a backward or a bidirectional prediction mode. The...
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6442202 |
Motion vector field error estimation
A technique is disclosed for estimating the measurement error in motion vectors used for example in a motion compensated video signal process. For each motion vector corresponding to a region of an...
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6442203 |
System and method for motion compensation and frame rate conversion
A system and method for de-interlacing, motion compensation and frame rate conversion of digitally encoded video signals. The invention utilizes multiple motion vectors per pixel of the final...
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6438170 |
Method and apparatus for motion estimation using block matching
Block matching is a robust and simple method of motion estimation for television pictures. One important parameter in block matching is the block size. Large blocks give more reliable motion...
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6430316 |
Motion vector compensation using overlapping weighted windows
A soft windowing technique involves the use of a window for vector assisted frame differing, the window being larger than a macroblock of the structure defined over the video picture. The edges of...
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6430223 |
Motion prediction apparatus and method
A motion prediction apparatus and method that is capable of preventing the redundancy of calculation occurring during a motion prediction. In the apparatus, a first motion estimator predicts a...
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6430224 |
Stereo video data coding apparatus
A corresponding MB 2 for the left sequence is determined from the parallax vector of a coding-object MB 1 of the frame Bi for the right sequence. The motion vector {circle around (2)} of the...
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6424676 |
Motion vector detecting method and device, and storage medium
An improved motion vector detecting method is provided that can ensure a wide search area while suppressing detection of erroneous motion vectors at the same time. Specifically, when detecting...
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6418168 |
Motion vector detection apparatus, method of the same, and image processing apparatus
A control circuit specifies a first search area by using a motion vector found in units of macroblocks between a plurality of frames located previous to first frame, specifies a second search area...
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6414994 |
Method and apparatus for generating smooth residuals in block motion compensated transform-based video coders
A method and apparatus for identifying a prediction block which generates smooth residuals in block motion compensated transform-based video coders. A base block from a first image, and a candidate...
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6414995 |
Motion vector detection system
The present invention relates to a motion vector detection method and system for detecting a motion vector for motion compensation in moving picture compression. The motion vector detection system...
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6411652 |
Motion estimation
A method of comparing a current block in a current frame to a plurality of background blocks in a preceding frame. Each block includes a matrix of data values arranged in a given number of columns....
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