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5812791 |
Multiple sequence MPEG decoder
An MPEG decoding system in a host system, including software instructions for decoding a first portion of MPEG encoded data, including instructions for extracting macroblock data from said MPEG...
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5812197 |
System using data correlation for predictive encoding of video image data subject to luminance gradients and motion
An MPEG based video signal compression system reduces picture degradation caused by sub-optimal selection of a prediction mode. A disclosed method produces a compressed video output signal from a...
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5808700 |
Motion video coding systems with motion vector detection
A motion vector detecting circuit and a motion video compressing system are disclosed. The detecting circuit detect a vector which direct from a spatial location of a current macroblock to a...
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5801775 |
Moving picture compression using cache memory for storing coding instructions
Processing of picture image compression coding is divided into a plurality of processing steps and programs for the respective steps are stored in a memory. Based on capacity of the memory, at...
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5801778 |
Video encoding with multi-stage projection motion estimation
A method and apparatus for performing multi-stage motion estimation on an input video sequence to be encoded. An original image in the video sequence, such as a CCIR601 image, is preprocessed to...
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5801777 |
Device and method for decoding digital video data
A device for decoding digital video data including a variable length decoder (VLD), an inverse discrete cosine transform (DCT) converting part, a movement compensating part, and a first storage...
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5801779 |
Rate control with panic mode
A rate control algorithm for an MPEG-2 compliant encoder is described. The rate control algorithm has embodiments useful for constant bit rate and variable bit rate encoding. In particular, the...
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5796434 |
System and method for performing motion estimation in the DCT domain with improved efficiency
A system and method for estimating motion vectors between frames of a video sequence which operates in the DCT domain with improved efficiency and reduced computational requirements. The motion...
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5793894 |
Image data editing apparatus and decoding apparatus
An image data editing apparatus edits image data coded based on inter-image prediction. Outputted are number data for specifying image data read from a recording medium and edition point data...
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5786858 |
Method of encoding image signal, apparatus for encoding image signal, method of decoding image signal, apparatus for decoding image signal, and image signal recording medium
An image signal encoding method and apparatus is provided. An input image signal is coded to produce coded picture signals. Specifically, the coded picture signals include a group-of-pictures...
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5786860 |
High speed block matching for bi-directional motion vector estimation
A high speed block matching algorithm for a bi-directional motion vector estimation, capable of improving the accuracy and the amount of computation in the bi-directional motion vector estimation...
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5786859 |
Video coding/decoding apparatus with preprocessing to form predictable coded video signal portion
A preprocessing device used in a video coding apparatus, comprising a motion compensation prediction estimating unit for detecting a change of an video from a current picture and a past picture to...
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5786856 |
Method for adaptive quantization by multiplication of luminance pixel blocks by a modified, frequency ordered hadamard matrix
A method for spatial compression of a digital video picture to obtain the quantizer step size so as to avoid over "lossy" reconstruction and loss of detail. The first step is dividing the picture...
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5784108 |
Apparatus for and method of reducing the memory bandwidth requirements of a systolic array
A novel apparatus for and method of reducing the memory bandwidth required to process data located in a window is disclosed. The data located in the window is processed against known template data...
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5781239 |
System and method for performing an optimized inverse discrete cosine transform with improved efficiency
An MPEG decoder system and method an MPEG decoder system and method for decoding frames of a video sequence. The MPEG decoder includes IDCT computation logic which computes the IDCT with improved...
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5777679 |
Video decoder including polyphase fir horizontal filter
A digital signal decoder system for receiving compressed encoded digitized video signals and transmitting decompressed decoded digital video signals with accurate expansion for various aspect...
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5778099 |
Picture block motion detecting apparatus
The invention selects a plurality of search ranges so that picture block motion detection can be controlled by feed forward sequence. A picture block motion detecting apparatus obtains an activity...
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5777678 |
Predictive sub-band video coding and decoding using motion compensation
A method and apparatus for sub-band encoding an input signal in which ringing may be diminished. When performing a number of wavelet transform operations by sub-band encoding, filtering the of...
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5774677 |
Dual interleaved block motion compensation
Input image data is stored in an interleaved format, in which data from two or more blocks are stored in an alternating fashion. Motion compensation is performed on the interleaved data by applying...
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5774206 |
Process for controlling an MPEG decoder
A process for decoding MPEG encoded image data stored in a system memory utilizing a configurable image decoding apparatus. The process comprises the steps of: (a) extracting macroblock information...
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5771316 |
Fade detection
A rate control algorithm for an MPEG-2 compliant encoder is described. The rate control algorithm has embodiments useful for constant bit rate and variable bit rate encoding. In particular, the...
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5768537 |
Scalable MPEG2 compliant video encoder
A scalable architecture MPEG2 compliant digital video encoder system having an I-frame only video encoder module with a Discrete Cosine Transform processor, a quantization unit, a variable length...
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5760835 |
Video coding device
The prediction error value calculated by a motion estimating portion is used for selecting the frame or field orthogonal transform coding mode. The frame prediction error value EFr and the field...
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5761398 |
Three stage hierarchal motion vector determination
A rate control algorithm for an MPEG-2 compliant encoder of the present invention has embodiments useful for constant bit rate and variable bit rate encoding. In particular, the invention relates...
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5757670 |
Frame reconstruction for video data compression
The frame reconstruction (FR) portion of an MPEG decompression circuit includes a horizontal interpolation element, a vertical interpolation element, and a selector (post processing) element. The...
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5754240 |
Method and apparatus for calculating the pixel values of a block from one or two prediction blocks
A method for calculating the pixel values of a sub-pixel accuracy motion compensated block of video pixels from one or two reference blocks, as is required in typical digital video compression and...
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5754236 |
Variable bit rate coding using the BFOS algorithm
A variable bit rate video (VBR) coding method includes the steps of (a) dividing an entire sequence of moving pictures into N blocks, (b) determining a quantizer scale group having M elements, each...
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5754235 |
Bit-rate conversion circuit for a compressed motion video bitstream
An input bitstream (a first bitstream) is divided into a main code having a changeable length and the remaining data. The main code is subjected to a bit-rate conversion and combined with the...
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5754238 |
Picture signal decoding method and apparatus thereof
In a picture signal decoding method, preceding of the display operation to the decoding operation can be prevented as to a bidirectional predictive picture. When the user specifies an arbitrary...
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5751360 |
Code amount controlling method for coded pictures
The invention provides a code amount controlling method wherein, when code amount control is performed in units of a GOP, data do not remain in a buffer even if data with which a moving picture...
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5751359 |
Method for quantizing compressed video signals
A method for encoding a 10-bit based picture using a circuitry or devices inherently designed for handing an 8-bit based picture. The 10-bit based input picture data is motion-compensated with 8...
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5748248 |
Real time motion vector processing of image data
Telescopic predictive coding of video frames reduces the number of pixels in a reference frame which are required to be processed. However, given that offsets for adjacent blocks may differ, it is...
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5745605 |
Device for estimation of movement
The disclosure concerns a device for estimation of movement by block matching in an image compression system based on blocks, characterized in that it comprises N lines×M columns of means of...
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5745183 |
Image motion estimation system which derives candidate block from interpolated motion vectors
A disclosed method and apparatus reduces the number of computations and simplifies the hardware required to provide compressed video output data. Video input data is converted into input pixel...
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5742347 |
Efficient support for interactive playout of videos
A system and method of transforming the standard compressed media stream used for distribution to a local form for a client station. A media stream is downloaded from an input source to a device in...
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5742344 |
Motion compensated video decoding method and system for decoding a coded video signal using spatial and temporal filtering
A video coding apparatus comprising a memory for storing a coded picture signal used as a reference picture signal, a vector detecting circuit for detecting, from plural field picture signals or...
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5742289 |
System and method of generating compressed video graphics images
In a hybrid system for synthesizing a compressed video bitstream from a dynamic 3-D model, the video bitstream represents an image sequence comprised of a plurality of image frames which are...
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5742343 |
Scalable encoding and decoding of high-resolution progressive video
High-resolution, progressive format video signals having high frame rates may be encoded by a base layer encoder and an enhancement layer encoder to provide two kinds of encoded video signals which...
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5739860 |
Method of and apparatus for decoding moving picture and outputting decoded moving picture in normal or frame-skipped reproducing operation mode
In a moving picture decoding apparatus, an output section is provided with a circuit for making a logic sum of control signals for renewing a picture data output, as a control signal for...
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5739862 |
Reverse playback of MPEG video
Reverse playback of MPEG video from a random access source takes advantage of the symmetry of B frames within an IB data stream. The IB data stream is processed by a parsing algorithm to identify...
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5739865 |
Image processing system with selective reproduction using thinning out or interpolation
An image processing system comprising an input circuit arranged to input an image signal of a first frame frequency, and a reproducing circuit arranged to reproduce the image signal inputted by the...
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5740278 |
Facsimile-based video compression method and system
A method and system for compressing and decompressing video image data in real time employs thresholding and facsimile-based encoding to eliminate the need for computationally intensive...
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5737022 |
Motion picture error concealment using simplified motion compensation
A motion picture image transmission apparatus constructing a motion picture image transmission system for coding and decoding a motion picture signal in the block unit includes an output section...
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5737023 |
Hierarchical motion estimation for interlaced video
A system and method for performing motion estimation. Interlaced frames are reduced in resolution using field based scaling, and a first search is performed on the reduced resolution frames. This...
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5734443 |
Method and device for performing source transitions in a video system which performs entropy encoding
A method and device for performing source transitions in a video system which performs entropy encoding such that a transition occurs only after the fields which define a frame picture have been...
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5731850 |
Hybrid hierarchial/full-search MPEG encoder motion estimation
An apparatus and method for determining inter-frame motion during compression of digital video data incorporates a computationally efficient hierarchical block-matching motion estimation technique...
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5731839 |
Bitstream for evaluating predictive video decoders and a method of generating same
A bitstream for testing a video decoder that produces visual distortions in the output video images from the decoder whenever the decoder produces an error in decoding the bitstream. Specifically,...
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5731835 |
Dynamic coding rate control in a block-based video coding system
A dynamic rate controller for a block-based video coding system. The rate controller is responsive to a scene cut flag generated by a scene cut detector. Once a scene cut flag is detected, the rate...
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5732155 |
Compression coding device and expansion reproducing device for a picture signal
A device for coding picture data by compression has a button circuit and a controller. When a button included in the button circuit is pushed by hand to enter a still picture mode command, the...
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5729293 |
Method and device for transcoding a sequence of coded digital signals
A device for transcoding coded digital signals which are representative of a sequence of images, which device comprises a variable length decoding channel (12) followed by a variable length...
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