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7379500 |
Low-complexity 2-power transform for image/video compression
To encode image and video data using a transform having low computational complexity and high compression efficiency, all elements of the matrix can be expressed with power-of-2 elements, with a...
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7376280 |
Video encoding and decoding
A method for encoding video with a two-dimensional (2D) transform separable to two one-dimensional (1D) transforms. The method receives an array of values for a sub-section of an image, performs a...
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7372906 |
Compression circuitry for generating an encoded bitstream from a plurality of video frames
Data is discrete cosine transformed and streamed to a processor where quantized and inverse quantized blocks are generated. A second streaming data connection streams the inverse quantized blocks...
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7369706 |
Image-data processing device, image-data processing method, image-data distributing device and image-data transmitting system
An image processing device for processing an original image divided into a plurality of blocks that are made up of a plurality of picture elements from encoded image-data which is obtained by...
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7369613 |
Process for the format conversion of MPEG bitstreams, a system and computer program product therefor
A process for format conversion of DCT macroblocks in an MPEG video bitstream that are divided into blocks, each of which includes a plurality of microblocks. In each DCT block, the significant...
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7366240 |
Decoder and method of decoding using pseudo two pass decoding and one pass encoding
A method of processing video frame data includes the steps of: receiving a video frame; partially decoding the video frame; fully decoding the video frame to produce macroblocks; determining video...
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7356191 |
Image encoding apparatus and method, program and recording medium
In an image encoder is provided, including a to-be-encoded object prediction unit which counts quantization coefficients which are newly made significant, for example, when each bit plane is...
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7356082 |
Video/audio signal processing method and video-audio signal processing apparatus
A metadata extraction unit has a feature point selection and motion estimation unit 62 for extracting at least one feature point representing characteristics of the video/audio signals in a...
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7352811 |
Data encoding apparatus and method
A data encoding apparatus operable to encode a plurality of data blocks produces encoded data in accordance with at least one of a selectable target data quantity or a selectable target data...
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7302107 |
JPEG encoding for document images using pixel classification
The invention provides a system and method for JPEG encoding an image that includes variable quantization for each block, depending upon the classification of each block, which is dependent on the...
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7295609 |
Method and apparatus for coding image information, method and apparatus for decoding image information, method and apparatus for coding and decoding image information, and system of coding and transmitting image information
An image information coding apparatus codes an input image signal in a manner optimized on the basis of the visual characteristics. In quantization, an input image signal is divided into blocks, an...
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7292730 |
Two-dimensional inverse discrete cosine transforming
Implementing a two-dimensional inverse discrete cosine transform function includes executing two one-dimensional inverse discrete cosine transforming functions. Each of the one-dimensional...
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7286713 |
Method for detecting and classifying block edge from DCT-compressed image
The present invention provides a method for detecting and classifying block edges from DCT-compressed images, and more particularly, a fast method for classifying the edge direction of each block...
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7280698 |
Method and apparatus for displaying noticeable image and system for remotely monitoring image
Coded, or compressed data of moving pictures is received through a transmission path. The picture type of the compressed data is detected from the received compressed data of moving pictures. If...
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7280595 |
Post-inverse-quantization AC prediction with a unified variable-length-decoding and inverse-quantization stage
A motion-picture-experts group (MPEG) decoder performs AC prediction to decode first-column or first-row coefficients that are coded as differences from corresponding coefficients in a prior block...
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7277586 |
Images combination processing system, images combination processing method, and images combination processing program
An images combination processing system has a CCD or an imaging element including CCDs for picking up an image, compression processing portions for applying JPEG compression, etc. to image data in...
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7272263 |
Image decoding with a simplified process
A decoding unit ( 12 ) decodes an image according to JPEG 2000. A simplifying unit ( 30 ) comprises an automatic transformer ( 32 ) which compares an elapsed time to a time limit at each stage of...
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7250878 |
Decoding device with multi-buffers and decoding method thereof
A decoding device includes a variable-length decoding circuit, a first buffer, a second buffer and a DC/AC prediction circuit is disclosed. The variable length decoding circuit decodes a first...
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7248632 |
Video data storage and transmission system and method
A video data storage and transmission system for security surveillance using a combination of data compression techniques which enable the system to operate effectively in limited bandwidth...
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7245662 |
DCT-based scalable video compression
A method of encoding an input video signal for communication over a computer network, the method comprising the steps of: i) dividing each frame into a two-dimensional array of macroblocks; ii)...
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7242713 |
2-D transforms for image and video coding
A set of one and two-dimensional transforms is constructed subject to certain range limited constraints to provide a computationally efficient transform implementation, such as for use in image and...
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7236529 |
Methods and systems for video transcoding in DCT domain with low complexity
Methods and systems for transcoding a video sequence in a discrete cosine transform (DCT) domain, wherein a transcoder receives a video bit-stream including frames and each of the frames including...
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7236528 |
System and method for processing time-based media
System and method for processing time-based media such as sequences of images, audio sequences, and the like on a computing device such as a personal computer. A method may comprise receiving a...
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7233623 |
Method and scalable architecture for parallel calculation of the DCT of blocks of pixels of different sizes and compression through fractal coding
A method of calculating the discrete cosine transform (DCT) of blocks of pixels of a picture includes the steps of defining first subdivision blocks called range blocks, having a fractional and...
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7227898 |
Digital signal conversion method and digital signal conversion device
An inputted digital signal of a first format (DV video signal) is restored to a variable-length code by having its framing cancelled by a de-framing section 11 , then decoded by a variable-length...
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7224734 |
Video data encoding apparatus and method for removing a continuous repeat field from the video data
A pattern analyzing portion analyzes a pattern of a detected repeat field and determines whether or not the pattern of the repeat field is continuous. An inverse pull-down controlling portion...
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7221709 |
Information processing apparatus and method, and program storage medium
An inputted digital signal of a first format (DV video signal) is restored to a variable-length code by having its framing cancelled by a de-framing section 11 , then decoded by a variable-length...
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7215707 |
Optimal scanning method for transform coefficients in coding/decoding of image and video
An optimal scanning method for coding/decoding an image signal is provided. In a method of coding an image signal through a discrete cosine transform, at least one is selected among a plurality of...
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7203236 |
Moving picture reproducing device and method of reproducing a moving picture
A moving picture reproducing device includes a compressed data buffer, a display size obtaining unit, a resolution selecting unit, four kinds of resolution decoding units, and a frame data buffer....
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7203235 |
Architecture and method for fine granularity scalable video coding
A robust fine granularity scalability video encoding includes a base layer encoder and an enhancement layer encoder in which motion compensated difference images are generated by comparing an...
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7197077 |
Multilevel data compression using a single compression engine
A single compression engine determines a plurality of discrete cosine transform (DCT) coefficients based on a discrete cosine transform of a plurality of blocks of data. The single compression...
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7190724 |
Method and apparatus for transform domain video processing
A method for reducing the memory requirements for decoding a bit stream is provided. The method initiates with receiving a video bit stream. Then, a frame of the bit stream is decoded into a...
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7180946 |
Circuit for filtering video data in the frequency domain
The present invention relates to a filter circuit for a set of original data (X 0 –X 7 ) able to implement in series the steps of discrete transformation (DCT 2 ), correction (ZER) of odd...
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7161984 |
Video reproduction apparatus with fast post-processing and method thereof
Provided are a video reproduction apparatus and method capable of effectively post-processing a video signal using a motion vector, a post-processed video signal and a difference video signal. The...
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7151856 |
Picture coding apparatus and picture coding method
A frame group target bits number calculating unit ( 31 ) reads the total number of bits on frame group basis allocatable to residual frames from a storing unit ( 36 ), updates subtracting the...
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7145953 |
Filtering method and apparatus for removing blocking artifacts and/or ringing noise
Provided are a filtering method and apparatus for removing blocking artifacts and/or ringing noise. The filtering apparatus includes (a) performing one-dimensional discrete cosine transform (1D...
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7145952 |
Dynamic selection of field/frame-based MPEG video encoding
A discrete cosine transform (DCT) level enhancement to Motion Picture Experts Group (MPEG) video encoding is described that results in a more concise bitstream than MPEG encoding without the...
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7145946 |
MPEG video drift reduction
A drift reduction method and apparatus. Drift reduction is effected in an MPEG video transcoder by decoding dropped out pixels to form a drift reference frame. The quantization indices in the...
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7142598 |
Adaptive DCT/IDCT apparatus based on energy and method for controlling the same
Adaptive DCT/IDCT apparatus based on energy and method for controlling the same. The adaptive DCT/IDCT apparatus relates to a coding unit of a MPEG4/H.263 video coder, and performs an image...
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7139315 |
Apparatus and process for decoding motion pictures
A motion picture decoding apparatus according to the invention includes: a coefficient reducing circuit for removing orthogonal transform coefficients for high horizontal frequencies from a certain...
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7123656 |
Systems and methods for video compression
The present invention is directed to systems and methods for video compression. In one embodiment, a method of encoding a matrix of transform coefficients is performed. The method includes...
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7123654 |
Method and apparatus to encode a moving image with fixed computational complexity
An apparatus and method thereof to encode a moving image include a discrete cosine transform (DCT) unit performing a DCT process on input video data, a quantizer, and a motion estimation (ME) unit...
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7092446 |
Compression-encoded data decoding apparatus
A decoding apparatus comprises a variable length decoder that decodes zero-run length and nonzero coefficient, an inverse quantizer that inverse-quantizes the nonzero coefficient, a zero-run...
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7092445 |
Video coder providing implicit coefficient prediction and scan adaptation for image coding and intra coding of video
A predictive video coder performs gradient prediction based on previous blocks of image data. For a new block of image data, the prediction determines a horizontal gradient and a vertical gradient...
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7079689 |
Image processing apparatus and its method, and program
An initial similarity candidate calculator calculates a similarity between first and second images, which are expressed by quantized DCT coefficients, on the basis of at least first and second...
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7078872 |
System and method for conditioning a signal
A method of conditioning a signal being communicated between a system to be controlled and a controller may include monitoring an actual output signal and conditioning the actual output signal. The...
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7076113 |
Apparatus and method for adaptive spatial segmentation-based noise reducing for encoded image signal
An efficient and non-iterative post processing method and system is proposed for mosquito noise reduction in DCT block-based decoded images. The post-processing is based on a simple classification...
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7075993 |
Correction system and method for enhancing digital video
A system and methodology assesses whether an error correction should be applied to detected blocks based on determined correction application criteria, and, if warranted according to the...
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7065491 |
Inverse-modified discrete cosine transform and overlap-add method and hardware structure for MPEG layer3 audio signal decoding
An inverse-modified discrete cosine transform and overlap-add method, and hardware structure for MPEG Layer3 audio signal decoding. In order to have the MPEG Layer3 audio signal decoder have more...
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7065139 |
Video encoding method and video encoder for improving performance
Video encoding methods and video encoders that provide improved performance while reducing power consumption. In one aspect, a video encoding method comprises the steps of outputting a parameter...
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