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7251372 |
Method and system for compressing digitized fingerprint images by a uniform degree of compression
A method and a system are described for achieving a desired value for the magnitude of compression when compressing the information contained in a digitized fingerprint images. A lossy compression...
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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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7242814 |
Signal encoding method and apparatus and decoding method and apparatus
A method of and an apparatus for encoding and decoding using transformation bases of a yet higher efficiency. In a method for encoding an object signal in compliance with a transformation rule, a...
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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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7239748 |
System and method for segmenting an electronic image
A system and method of identifying foreground segments in a JPEG image. The method includes the steps of: selecting a block in the JPEG image; extracting a set of DCT coefficients from the block,...
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7236634 |
Image encoding of moving pictures
In an encoding method of moving pictures which generates a predictive picture for a current picture based on a reference picture and a motion vector, a macroblock is divided into subblocks. In each...
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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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7233703 |
Computation-reduced IDCT method for video coding
Reduced complexity inverse discrete cosine transform (IDCT) masks and a method for reducing the number of IDCT calculations in video decoding are provided. The method comprises: accepting an n×m...
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7231095 |
Spread spectrum signal demodulation method and apparatus
The present invention relates to a spread spectrum signal demodulating method whereby spread-code synchronous acquisition and carrier synchronous acquisition are performed using FFT at high speed,...
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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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7224841 |
Method and apparatus for accelerating variable length coding (VLC) decoding in the process of inverse discrete cosine transformation (IDCT)
In some embodiments of the present invention, frequently occurring inverse linear transform results are calculated and stored in look-up-tables. In real time, incoming blocks of linear transform...
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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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7221774 |
Local phase filter to assist correlation
A local phase filter ( 315 ) for pre-processing data ( 310 ) including a watermark ( 320 ) is disclosed. The data ( 310 ) is pre-processed before detecting the watermark by correlation of the data...
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7218789 |
Method for lossless encoding of image data by approximating linear transforms and preserving selected properties for image processing
A method for generating a first plurality of output data values and the matrix factors used to generate an approximation to an image processing transform is disclosed. The first plurality of output...
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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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7206458 |
Method of compressing digital images acquired in CFA format
A method of compressing digital images acquired in CFA format that utilizes optimized quantization matrices. The method, basing itself on the statistical characterization of the error introduced...
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7206430 |
Data processing apparatus and method of processing data
A watermarking system comprises an encoding data processor operable to generate at least one marked version of an original item of material by introducing one of a predetermined set of code words...
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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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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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7197163 |
Watermark embedding method based on DCT subband image characters
A watermark embedding method based on DCT subband image characters is disclosed. An original image is converted into a frequency image using a discrete cosine transformation. The watermark...
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7194139 |
Image compression
A method of image compression, comprising: providing image-data encoding light; transforming said light from an image space to a transform space utilizing an optical component; and converting said...
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7190840 |
Transform coefficient compression using multiple scans
A transform coefficient block of a frequency domain representation of a digital image is processed by performing scans on at least three different regions of the block.
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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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7174047 |
Single-instruction multiple-data (SIMD)-based algorithms for processing video data
In a video encoder/decoder, a method processes a discrete cosine transform (DCT) block of coefficients. The method receives a DCT block of coefficients, and linearizes the DCT block of coefficients...
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7170932 |
Video transcoder with spatial resolution reduction and drift compensation
A method and system reduces the spatial resolution of a compressed bitstream of a sequence of frames of a video signal by first decoding the frames, and storing the decoded frames in a first frame...
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7162093 |
Slice-layer in video codec
A video encoder/decoder utilizes a bistream syntax that provides an independently decodable, partial picture unit, which may be in the form of a unit containing one or more contiguous rows of...
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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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7151842 |
Watermark embedding and extracting method and embedding hardware structure used in image compression system
A watermark and extracting method and a watermark hardware structure used in an image compression system. A series of data is generated by random variables, such that duplication is avoided....
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7149363 |
Image processing method, apparatus therefor and storing medium
The present invention permits to determine an image characteristic amount for efficiently searching an image without affecting a bad influence upon searching accuracy. First image characteristic...
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7149324 |
Electronic watermark insertion device, detection device, and method
The use of the undefined low-order four bits of an 8-bit watermark is defined and, when contents are reproduced, a predetermined operation is performed according to the information stored in the...
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7149360 |
Method for using a JPEG engine to assist in efficiently constructing MPEG I-frames
A camera or other imaging device or other system configures its JPEG engine to produce a JPEG image that is in compliance with the JPEG specification but specially constructed. The configuration is...
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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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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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7142235 |
Opportunistic improvement of digital camera image quality
Opportunistic image quality improvement in a digital camera. In a digital camera having a picture memory of fixed size for storing a predetermined number of pictures, raw image data is compressed...
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7139443 |
Signal processing method for producing interpolated signal values in a sampled signal
A method for producing interpolated signal values between sampled signal values in a sampled image signal produced by a checkerboard sampling pattern is accomplished by extracting a block of...
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7139436 |
Orthogonal transform method and apparatus
In a four-by-four orthogonal transform mode, an input data buffer enters a first half of entered eight pieces of pixel data, i.e., “x0A”, “x1A”, “x2A”, and “x3A”, into each of the...
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7136535 |
Content recognizer via probabilistic mirror distribution
An implementation of a technology, described herein, for facilitating the recognition of content of digital goods. At least one implementation, described herein, derives a probabilistic mirror...
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7130472 |
Image distribution apparatus, communication terminal apparatus, and control method thereof
An image distribution apparatus divides image data of a single frame into a plurality of blocks, orthogonally transforms the blocks and calculates transformation coefficients, quantizes the...
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7127119 |
Image processing apparatus and method, program, and storage medium
An apparatus has a one-dimensional DCT transformer for applying the one-dimensional orthogonal transforms to n inputs and outputting n coefficients, a transposition converter for transposing n×n...
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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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7116831 |
Chrominance motion vector rounding
Various techniques and tools for chrominance motion vector rounding are described. For example, during motion compensation, a video encoder or decoder converts luminance motion vectors into...
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7114073 |
Digital contents generating apparatus and digital contents reproducing apparatus
A digital contents generating apparatus connected with a communication network comprises an electronic watermark-data embedding unit for embedding electronic watermark data in digital contents, an...
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7102551 |
Variable length decoding device
A variable length decoding device for decoding variable length coding data and run length coding data according to the present invention comprises a variable length decoding unit 3 for serially...
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7099517 |
Codebook search methods
A method of compressing an image frame composed of an array of pixels in the form of digital signals comprises a two stage codebook search. In the first stage the pixelated image frame and the...
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7095870 |
Electronic watermark embedding apparatus and method and a format conversion device having a watermark embedding function
In an electronic watermark embedding technique, even when image data compression such as MPEG2 compression is conducted for image data of an image including a watermark while keeping deterioration...
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7092576 |
Bitplane coding for macroblock field/frame coding type information
In one aspect, for a first interlaced video frame in a video sequence, a decoder decodes a bitplane signaled at frame layer for the first interlaced video frame. The bitplane represents field/frame...
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7082450 |
Implementation of a transform and of a subsequent quantization
The invention relates to an approximation of a DCT and a quantization which are to be applied subsequently to digital data for compression of this digital data. In order to improve the transform,...
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7079697 |
Image compression with transform coefficient analysis
A method of image/video compression with intra-coding blocks analyzed for sum of absolute magnitudes of AC coefficients of DCT of block to determine whether to approximate the block with 0 AC...
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7079698 |
Image coding and decoding apparatus, method of image coding and decoding, and recording medium for recording program for image coding and decoding
In an image decoding apparatus that generates a decoded image from a code sequence. The decoding apparatus has a bus, a computer and a memory, wherein the computer and the memory are connected to...
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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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