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Class 382/251 - Quantization


Subclass of Class 382 - Image analysis
Definition: Subject matter in which a broad range of input image values
No. of patents: 915
Last issue date: 05/14/2013


1                      
NumberTitleIssue Date
8442337Encoding adjustments for animation content
Techniques and tools are described for encoding animation video. In some embodiments, a video encoder designates animation video for encoding as animation content, which typically involves changing one or more encoder settings or rules to improve encoding performanc...
05/14/2013
8442338Visually optimized quantization
Visually optimized quantization is described herein. Specifically, the visually optimized quantization is for arbitrary block-based transforms such as Mode-Dependent Directional Transform (MDDT). The compression method involves the process of taking a discrete cosin...
05/14/2013
8437565Encoding methods and apparatus including buffer rate control
Methods and apparatus for performing image encoding and rate control as part of the image encoding process, e.g., a JPEG-2000 compliant image encoding process, are described. As part of the image encoding processes, rate control operations are performed based on rat...
05/07/2013
8433151Image coding apparatus, image coding method and computer readable medium storing program
An image coding apparatus includes: a transformation unit that transforms spatial domain image data having plural pixels, by a pixel block including plural pixels as a unit, into plural coefficient groups each including plural frequency domain coefficients; a groupi...
04/30/2013
8428380Apparatus and method of embedded quantization for the improved SNR scalbility
Provided are a method and apparatus for enhancing coding efficiency by performing encoding and decoding by optimally calculating quantization intervals and reconstruction values through a distribution of DCT coefficients of each frame, when DCT coefficients of each ...
04/23/2013
8428381Image compression method with variable quantization parameter
An image compression method s used for processing a plurality of pixels of an image. The image compression method includes the steps of receiving N successive pixels; obtaining N pixel differences and N map differences corresponding to the N pixels according to valu...
04/23/2013
8422810Method of redundant picture coding using polyphase downsampling and the codec using the method
Provided are a method for redundant slice coding by polyphase down-sampling (PD) and a codec using the method. An encoder for redundant slice coding by PD includes a PD coding unit rearranging a residual block that is a difference between a current block and a predi...
04/16/2013
8401322Image recording device, image recording method and program
There is provided an image recording device, including: a highly-gradating unit for highly-gradating an input image having a first gradation depth, thereby generating a high gradation image having a second gradation depth higher than the first gradation depth; an im...
03/19/2013
8379997Image signal processing device
An image signal processing device 1 comprises an encoding part 10, a delay part 20, a difference calculation part 30, a decoding part 40, a quantization error determination part 50 and a corrected image data output part 6...
02/19/2013
8374451Image processing device and image processing method for reducing the circuit scale
The present invention enables a circuit configuration to be simplified. An image encoding device (100) receives an input image (91) that is line-scanned in units of MBs as scan blocks, each constituted by a plurality of 4×4 blocks, while being scanned...
02/12/2013
8369639Image processing apparatus, computer readable medium storing program, method and computer data signal for partitioning and converting an image
An image processing apparatus includes a partitions setting unit that sets up image partitions into which an input image is separated; a tone number setting unit that sets the number of tones for each of the image partitions set up by the partitions setting unit, ba...
02/05/2013
8363969Systems and methods for image coding and processing
Embodiments of the present invention include systems and methods for processing and coding image data. In one embodiment, image data is coded using a first image coding process. If a bit rate constraint is satisfied, the image data is output. If the bit rate constra...
01/29/2013
8340449Three-dimensional wavelet based video fingerprinting
A method and system generates and compares fingerprints for videos in a video library. The video fingerprints provide a compact representation of the spatial and sequential characteristics of the video that can be used to quickly and efficiently identify video conte...
12/25/2012
8331709Fixed buffer real-time image compression technique
Performing real-time compression on an image for target buffer fullness includes dividing the image into N macro-blocks, performing a discrete cosine transformation (DCT) on each of the N macro-blocks, defining a Quantization Parameter Scalar (Q) for each of the N m...
12/11/2012
8326068Method and apparatus for modeling quantization matrices for image/video encoding
A method for encoding an image is disclosed. The method generally includes the steps, of (A) generating a quantization matrix as a function of at least four parameters, (B) optimizing the parameters to maximize a quality metric for encoding the image and (C) encodin...
12/04/2012
8315471Image processor
An image processor includes a frequency transform unit performing frequency transform independently on a luminance signal and plural chrominance signals and outputting an item of frequency data of the luminance signal and plural items of frequency data of the chromi...
11/20/2012
8295626Method and system for adaptive quantization layer reduction in image processing applications
A method and a system for adaptively (dynamically) reducing quantization layer reduction for removing quantization artifacts in quantized video signals is provided. Adaptively reducing quantization layer reduction involves detecting if a selected pixel in a quantize...
10/23/2012
8270744Image processing apparatus and image processing method
The present invention enables a reduction in circuit scale. In an image coding apparatus (100), as for DCT coefficients as simple coded data obtained by coding an input image (91) by simple processing, the input image (91) is coded by at ...
09/18/2012
8270745Image processing device and image processing method
The present invention can realize an image processing device and an image processing method that enable a simplified circuit configuration. An image encoding device (200) encodes an input image (91) in an ordinary process that is the same as main encod...
09/18/2012
8254710Compression method, extension method and image processing apparatus
In a compression method of quantizing and compressing image data of an image, the method comprises the steps of: determining a method of quantization for each pixel; quantizing the image data in pixel unit according to the determined quantization method; storing the...
08/28/2012
8238680Image compression method with variable quantization parameters and variable coding parameters
An image compression method is used for processing a plurality of pixels of an image. The image compression method includes the steps of receiving N pixels; analyzing the N pixels and generating a content type corresponding to the N pixels; obtaining a quantization ...
08/07/2012
8200035Method and apparatus for correcting quantized coefficients in decoder
Provided are a method and apparatus for correcting quantized coefficients. In the method, statistical values of coefficients and quantized coefficients are extracted from a received video data stream, coefficient correction values for each pixel position in blocks a...
06/12/2012
8194991Out-of-order coding
A block encoder is operable to encode a target region of an image. The encoder encodes blocks from a target region of an image. The encoded blocks are stored in a scan order of the image. The encoded blocks are reordered into a scan order for the target region, and ...
06/05/2012
8189936Image processing apparatus and computer readable medium storing program to encode data blocks based on feature indices
An image processing apparatus includes a criteria setter that sets selection criteria for selecting quantization intensities on the basis of feature indices of an inputted image; an intensity selector that selects, on the basis of the selection criteria set by the c...
05/29/2012
8170359Encoding device and encoding method
An encoding device 100 includes a quantization parameter generating circuit 111 that generates a provisional quantization parameter, a quantizing circuit 121 that generates quantized data by quantizing a signal to be quantized on the basis of th...
05/01/2012
8160377Image compression apparatus
A symbol generation part serially inputs a data string of quantization data. If quantization data of non-zero coefficient is inputted, respective information on an absolute value, a zero run and a sign of the non-zero coefficient are stored in registers. When quanti...
04/17/2012
8150187Baseband signal quantizer estimation
A method of deblocking an input signal is disclosed. The method generally includes the steps of (A) calculating a plurality of transform coefficients corresponding to each of a plurality of blocks in the input signal at baseband, (B) calculating a plurality of quant...
04/03/2012
8150186Amount-of-compressed data control method and image data compressing apparatus
An amount-of-compressed-data control method applicable to image data compression processing for compressing an amount of data is disclosed. The method includes the steps of: performing quantization by: dividing one digital image into multiple blocks each having n×n...
04/03/2012
8139882Method for locally adjusting a quantization step and coding device implementing said method
The invention relates to a method of locally adjusting a quantization step for each region of an image in a sequence of n images. The method comprises the following steps; calculating, for each image of the sequence, a first difference of bits saved on the potential...
03/20/2012
8139881Method for locally adjusting a quantization step and coding device implementing said method
The invention relates to a method of locally adjusting a quantization step for each region of an image with respect to a setpoint quantization step. The method comprises the steps of: assigning, to said region of interest, a first ...
03/20/2012
8107755Information processing apparatus and method
An information processing apparatus for encoding image data includes: a rearranging unit for rearranging coefficient data divided for each frequency band in order of executing synthesis processing for synthesizing the coefficient data of multiple sub-bands divided i...
01/31/2012
8090209Image coding device, digital still camera, digital camcorder, imaging device, and image coding method
Coding processing performed by an image coding device (100) includes: processing (S133) of performing coding by leaving surplus bit(s), when the digit number B of binary data of the difference value between (a) a value of a to-be-coded pixel and (b) a ...
01/03/2012
8086057Dynamic quantizer structures for efficient compression
A method and system are introduced that provide dynamic quantizer structures which are configurable during run time. A quantizer configuration and data are stored in a binary format. The dynamic quantizer data is represented as a bitstream, and the bitstream in turn...
12/27/2011
7986849System and method for accurate parallel quantization with two multiplication operations
A method, system and computer program product that involves receiving and initializing a digital image. Quantization is preformed on the digital image using at least two multiplication operations. Finally, a compressed version of the digital image is presented for v...
07/26/2011
7848586System, medium, and method encoding and/or decoding image data
A system, medium, and method encoding and/or decoding image data. The image data encoding may include a transformer transforming pixel values of an image in the time domain to pixel values in the frequency domain, a quantization coefficient determiner determining a ...
12/07/2010
7844124Method of estimating a quantization parameter
A method of estimating a quantization parameter is provided. The method is applied to a de-blocking filter. The de-blocking filter de-blocks a decoded block-based image according to the quantization parameter, and the block-based image is coded and decoded in units ...
11/30/2010
7813575Enhancing compression while transcoding JPEG images
Further compression of data allowing economical storage of data for extended periods of time in high-speed access memory is performed in reduced time by performing further compression during transcoding in the transform domain and without restoring image data to its...
10/12/2010
7805014Image-encoding controlling apparatus for using a table reflecting statistical frequency of quantization parameter selection and method thereof
An image-encoding method and apparatus is provided for using a table statistically reflecting a selection frequency of a quantization parameter. The method includes the steps of preparing a table representing a relationship among a target bit quantity, a quantizatio...
09/28/2010
7801383Embedded scalar quantizers with arbitrary dead-zone ratios
Embedded scalar quantizers for compression are described, along with tools for corresponding decompression. For example, a codec uses an embedded dead zone plus uniform threshold quantizer with repeated division of steps by specific factors. Non-dead-zone steps at a...
09/21/2010
7751638Adaptive quantizer
A quantizer can be used to adjust the number of bits representing each sample value in a signal. Then, each received sample is allocated to one of a number of bins, with each bin corresponding to one of the possible quantizer output values. The quantizer can be used...
07/06/2010
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