Patent application number | Description | Published |
20100074518 | METHOD AND APPARATUS FOR ENCODING IMAGE - A value of a selection parameter is sequentially set from among a plurality of parameters included in a modeling equation to derive a quantization matrix. A value of each of the parameters is sequentially derived based on a code amount and an encoding distortion obtained from an encoding using a quantization matrix generated from an updated parameter set. | 03-25-2010 |
20110090966 | VIDEO PREDICTIVE CODING DEVICE AND VIDEO PREDICTIVE DECODING DEVICE - According to one embodiment, a video coding device includes: a bi-directional predictor that generates a predicted image of an image to be coded by using a reference image, which includes a decoded image of a bi-directionally predictive coded image, and motion vector information; and a coder that codes a prediction error between the image to be coded and the predicted image. The bi-directional predictor generates the predicted image while switching a plurality of arithmetic methods that use different rounding methods. | 04-21-2011 |
20140010446 | IMAGE CODING METHOD, IMAGE DECODING METHOD, IMAGE CODING APPARATUS, AND IMAGE DECODING APPARATUS - According to an embodiment, an image coding method is for coding an image including a luminance component and color difference components. The method includes acquiring a reference image; and generating a predicted image by interpolating the luminance component and the color difference components in the reference image according to a motion vector. If a size of a block, which is designated as a unit of the interpolation, is equal to or smaller than a predetermined first threshold value, the generating includes inhibiting a bi-directional prediction, and performing only a uni-directional prediction to generate the predicted image according to the motion vector. | 01-09-2014 |
20140056357 | ENCODING DEVICE, DECODING DEVICE, ENCODING METHOD, AND DECODING METHOD - According to an embodiment, an encoding device includes: an index setting unit sets an index that represents information of a reference image and a weighting factor; an index reconfiguring unit predicts a reference value of the weighting factor, wherein the reference value indicates a factor to be set if a difference of pixel value between a reference image and a target image to be encoded is less than or equal to a specific value; and an entropy encoding unit encodes a difference value between the weighting factor and the reference value. | 02-27-2014 |
20140072237 | ENCODING DEVICE, DECODING DEVICE, ENCODING METHOD, AND DECODING METHOD - According to an embodiment, an encoding device includes an index setting unit and an encoding unit. The index setting unit generates a common index in which reference indices of one or more reference images included in a first index and a second index are sorted in a combination so as not to include a same reference image in accordance with a predetermined scanning order. The first index representing a combination of the one or more reference images referred to by a first reference image. The second index representing a combination of the one or more reference images referred to by a second reference image. The encoding unit encodes the common index. | 03-13-2014 |
20140079125 | ENCODING DEVICE, DECODING DEVICE, ENCODING METHOD, AND DECODING METHOD - According to an embodiment, an encoding device includes a deriving unit and an encoding unit. The deriving unit is configured to derive a first reference value based on fixed point precision representing roughness of a weighting factor that is used for multiplying a reference image. The encoding unit is configured to encode a first difference value that is a difference value between the weighting factor and the first reference value and the fixed point precision. The weighting factor is included in a first range of predetermined bit precision having the first reference value at approximate center. The first difference value is in the predetermined range. | 03-20-2014 |
20140085537 | DECODING DEVICE AND ENCODING DEVICE - According to an embodiment, a decoding device includes an acquiring unit configured to acquire first format information, encoded data, and first filter information, the first format information indicating a resolution of a color-difference component of the encoded data; a decoding unit configured to decode the encoded data to obtain a decoded image; and a converting unit configured to convert a color-difference format of the decoded image represented by a first color-difference format by using a filter identified by the filter information. | 03-27-2014 |
20140118544 | IMAGE SYNCHRONIZATION DEVICE AND SYSTEM - According to an embodiment, an image synchronization device includes an image capturing unit, a searching unit, and an output unit. The image capturing unit is configured to capture a first image while a mobile object on which the image capturing unit is mounted is running on a route. The searching unit is configured to acquire time-series second images captured by the image capturing unit while the mobile object was previously running on the route, obtain similarity between the first image and each of the second images, and search for a specific second image with the similarity satisfying criteria for select. The output unit is configured to output a synchronized image based on the first image and the specific second image. | 05-01-2014 |
20140218610 | DECODING DEVICE AND ENCODING DEVICE - According to an embodiment, a decoding device includes an acquiring unit configured to acquire first format information, encoded data, and first filter information, the first format information indicating a resolution of a color-difference component of the encoded data; a decoding unit configured to decode the encoded data to obtain a decoded image; and a converting unit configured to convert a color-difference format of the decoded image represented by a first color-difference format by using a filter identified by the filter information. | 08-07-2014 |
Patent application number | Description | Published |
20100135389 | METHOD AND APPARATUS FOR IMAGE ENCODING AND IMAGE DECODING - An image encoding apparatus includes a transform/quantization unit configured to perform transform and quantization with respect to a prediction error signal indicative of a difference value between a predicted image signal and an input image signal in order to generate a quantized transform coefficient, a encoding unit configured to perform entropy encoding with respect to the quantized transform coefficient in order to generate encoded data, a derivation unit configured to derive prediction complexity indicative of a degree of complication of the prediction processing, a determination unit configured to determine filtering strength for a locally decoded image signal to become low as the prediction complexity increases, a filter unit configured to perform deblocking filter processing with respect to the locally decoded image signal in accordance with the filtering strength, and a storage unit configured to store the locally decoded image signal after the deblocking filter processing. | 06-03-2010 |
20100303149 | VIDEO ENCODING/DECODING APPARATUS - An image processor to produce a local decoded image corresponding to an input image, a region partitioning module to classify the local decoded image into a plurality of regions using a given parameter, a filter designing module to design a filter coefficient for every classified region, a filter processor to filter the local decoded image according to a corresponding filter coefficient for every classified region, a frame memory to store a filtered image, a predictor to produce a prediction image using a stored image, and an encoder to output a parameter used for classification of the region and information of a filter coefficient every classified region as encoded data are provided. | 12-02-2010 |
20100322303 | VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method wherein an encoded image is used as a reference image for prediction of an image to be encoded next, includes generating a restored image by applying a filter to a local decoded image of an encoded image, setting filter coefficient information of the filter, encoding the filter coefficient information, encoding specific information indicating the local decoded image used as a reference image or the restored image, and storing either the local decoded image or the restored image as the reference image in a memory based on the specific information. | 12-23-2010 |
20100329335 | VIDEO ENCODING AND DECODING APPARATUS - According to one embodiment, a video encoding apparatus includes a setting module to set a filter coefficient for use in filtering in a video decoding apparatus, and to set a rounding offset for controlling rounding of operation in the filtering, and an encoder to output the filter coefficient and information of the rounding offset as encoded data. | 12-30-2010 |
20110026595 | VIDEO ENCODING/DECODING APPARATUS - According to one embodiment, an image encoding apparatus performs encoding according to coefficient information whose probability distribution differs due to a prediction method. The image encoding apparatus includes a plurality of probability estimators provided for a plurality of prediction directions of intra-picture prediction and configured to estimate occurrence probabilities of coefficient information respectively, a switch to select a probability estimator according to information of a prediction direction used for intra-picture prediction, and a variable length encoder to encode coefficient information according to occurrence probability of coefficient information provided from a probability estimator selected by the switch. | 02-03-2011 |
20110069752 | MOVING IMAGE ENCODING/DECODING METHOD AND APPARATUS WITH FILTERING FUNCTION CONSIDERING EDGES - According to one embodiment, a moving image encoding method is disclosed. The method can generate a prediction error image based on a difference between an input moving image and a predicted image. The method can execute transform and quantization on the prediction error image to generate quantized transformation coefficients. The method can generate edge information which indicates an attribute of an edge in a local decoded image corresponding to an encoded image. The method can generate, based on the edge information, control information associated with application of a filter to a decoded image at a decoding side. The method can set filter coefficients for the filter based on the control information. In addition, the method can encode the quantized transformation coefficients and filter coefficient information indicating the filter coefficients to output encoded data. | 03-24-2011 |
20110075732 | APPARATUS AND METHOD FOR ENCODING AND DECODING MOVING IMAGES - According to an embodiment, a moving image encoding method includes generating a predicted image of an original image based on a reference image, performing transform and quantization on a prediction error between the original image and the predicted image to obtain a quantized transform coefficient, performing inverse quantization and inverse transform on the quantized transform coefficient to obtain a decoded prediction error, adding the predicted image and the decoded prediction error to generate a local decoded image, setting filter data containing time-space filter coefficients for reconstructing the original image based on the local decoded image and the reference image, performing a time-space filtering process on the local decoded image in accordance with the filter data to generate a reconstructed image, storing the reconstructed image as the reference image, and encoding the filter data and the quantized transform coefficient. | 03-31-2011 |
20110150080 | MOVING-PICTURE ENCODING/DECODING METHOD AND APPARATUS - In one embodiment, a moving-picture decoding apparatus is disclosed. A decoding unit decodes input coded data to generate a quantized transform coefficient and filter information. An inverse-transform/inverse-quantization unit executes inverse-quantization and inverse-transform on the quantized transform coefficient to generate a prediction error picture. A decoded-picture generation unit generates a decoded picture using the prediction error picture and a predicted picture. A luminance filter processing unit applies a luminance filter to the luminance signal of the decoded picture based on luminance filter information to generate the luminance signal of a restored picture. A chrominance filter processing unit applies a chrominance filter to the chrominance signal of the decoded picture based on chrominance filter information to generate the chrominance signal of the restored picture. | 06-23-2011 |
20110228844 | MOVING PICTURE ENCODING METHOD AND MOVING PICTURE DECODING METHOD - According to one embodiment, a moving picture encoding method includes deriving a target filter to be used for a decoded image of a target image to be encoded. The method includes setting a correspondence relationship between target filter coefficient in the target filter and reference filter coefficient in a reference filter in accordance with tap length of the target filter and tap length of the reference filter. The method includes deriving coefficient difference between the target filter coefficient and the reference filter coefficient in accordance with the correspondence relationship. The method includes encoding target filter information including the tap length of the target filter and the coefficient difference. | 09-22-2011 |
20120128073 | VIDEO ENCODING APPARATUS AND A VIDEO DECODING APPARATUS - According to one embodiment, a video encoding apparatus is a video encoding apparatus for subjecting a video image to motion compensated prediction coding, includes an acquisition module to acquire available blocks of blocks having motion vectors from encoded blocks adjacent to a to-be-encoded block and number of the available blocks, an acquisition/selection module to select one selection block from the encoded available blocks, a selection information encoder to encode selection information specifying the selection block using a code table corresponding to the number of available blocks, and an image encoder to subject the to-be-encoded block to motion compensated prediction coding using a motion vector of the selection block. | 05-24-2012 |
20130022109 | VIDEO ENCODING METHOD, DECODING METHOD, AND APPARATUS - According to one embodiment, a method can generate an interpolation image signal including the integer-pixel and interpolation pixel values, based on, if the interpolation pixel is not located at the integer-pixel position and in a row of an integer-pixel, and the interpolation pixel is located at a first pixel position displaced from the integer-pixel in horizontal and vertical directions by a half pixel, applying a first filter, and if the interpolation pixel is located at a second pixel position displaced from the integer-pixel in the directions by a quarter pixel, applying a second filter, and if the interpolation pixel is not located at the first and second pixel positions, applying the second and first filters. | 01-24-2013 |
20130028328 | IMAGE ENCODING METHOD AND IMAGE DECODING METHOD - According to one embodiment, an image encoding method includes selecting a motion reference block from an already-encoded pixel block. The method includes selecting an available block including different motion information from the motion reference block, and selecting a selection block from the available block. The method includes generating a predicted image of the encoding target block using motion information of the selection block. The method includes encoding a prediction error between the predicted image and an original image. The method includes encoding selection information identifying the selection block by referring to a code table decided according to a number of the available block. | 01-31-2013 |
20130034166 | IMAGE ENCODING METHOD AND IMAGE DECODING METHOD - According to one embodiment, an image encoding method includes selecting a motion reference block from an encoded pixel block to which an inter prediction is applied. The method includes selecting one or more available blocks from the motion reference block. The method includes selecting a selection block from the available blocks. The method includes generating a predicted image of the encoding target block using motion information of the selection block. The method includes encoding a prediction error between the predicted image and an original image. The method includes encoding selection information specifying the selection block by referring to a code table decided according to a number of the available blocks. | 02-07-2013 |
20130094581 | MOVING-PICTURE ENCODING APPARATUS AND MOVING-PICTURE DECODING APPARATUS - According to one embodiment, an encoding apparatus includes a prediction unit, a classifying unit, a first transformer, a second transformer, an order controller, and an entropy coder. The prediction unit obtains a predictive residual signal to be encoded, by using a mode selected from intra-prediction modes. The first transformer obtains first transformation coefficients by subjecting the signal to an orthogonal transformation by use of a first transformation basis if the selected mode is classified into a mode having a prediction direction. The first transformation basis is preset so that a coefficient density after the orthogonal transformation is higher than a coefficient density. | 04-18-2013 |
20130107944 | MOVING IMAGE ENCODING METHOD AND DECODING METHOD | 05-02-2013 |
20130107955 | MOVING-PICTURE ENCODING APPARATUS AND MOVING-PICTURE DECODING APPARATUS | 05-02-2013 |
20130182763 | VIDEO ENCODING APPARATUS, DECODING APPARATUS AND VIDEO ENCODING METHOD - According to one embodiment, a video encoding apparatus includes a controller, a loop filter processor, a interpolation filter, a generator, a transform unit, a quantizer, an encoder. The interpolation filter processor directly calculates, if motion compensation prediction of quarter pixel precision is performed, a sub-pixel value of a sub-pixel displaced from an integer-pixel by a quarter pixel in a horizontal direction or a vertical direction based on integer-pixel values of a reproduction image signal, and to generate a reference image including a integer-pixel and a sub-pixel. | 07-18-2013 |
20140010309 | IMAGE ENCODING METHOD AND IMAGE DECODING METHOD - According to one embodiment, disclosed is a method of dividing an input image signal into pixel blocks, and performing inter-prediction on the divided pixel blocks. This method includes selecting predicted motion information from a motion information buffer storing motion information in an encoded region, and predicting motion information of an encoding target block by using the predicted motion information. The method further includes acquiring representative motion information from a plurality of items of motion information in an encoded region in accordance with first information indicating a method of selecting the predicted motion information, thereby obtaining only the representative motion information. | 01-09-2014 |
20140169462 | MOVING-PICTURE ENCODING APPARATUS AND MOVING-PICTURE DECODING APPARATUS - According to one embodiment, an encoding apparatus includes a prediction unit, a classifying unit, a first transformer, a second transformer, an order controller, and an entropy coder. The prediction unit obtains a predictive residual signal to be encoded, by using a mode selected from intra-prediction modes. The first transformer obtains first transformation coefficients by subjecting the signal to an orthogonal transformation by use of a first transformation basis if the selected mode is classified into a mode having a prediction direction. The first transformation basis is preset so that a coefficient density after the orthogonal transformation is higher than a coefficient density. | 06-19-2014 |
20140169463 | MOVING-PICTURE ENCODING APPARATUS AND MOVING-PICTURE DECODING APPARATUS - According to one embodiment, an encoding apparatus includes a prediction unit, a classifying unit, a first transformer, a second transformer, an order controller, and an entropy coder. The prediction unit obtains a predictive residual signal to be encoded, by using a mode selected from intra-prediction modes. The first transformer obtains first transformation coefficients by subjecting the signal to an orthogonal transformation by use of a first transformation basis if the selected mode is classified into a mode having a prediction direction. The first transformation basis is preset so that a coefficient density after the orthogonal transformation is higher than a coefficient density. | 06-19-2014 |
20140169464 | MOVING-PICTURE ENCODING APPARATUS AND MOVING-PICTURE DECODING APPARATUS - According to one embodiment, an encoding apparatus includes a prediction unit, a classifying unit, a first transformer, a second transformer, an order controller, and an entropy coder. The prediction unit obtains a predictive residual signal to be encoded, by using a mode selected from intra-prediction modes. The first transformer obtains first transformation coefficients by subjecting the signal to an orthogonal transformation by use of a first transformation basis if the selected mode is classified into a mode having a prediction direction. The first transformation basis is preset so that a coefficient density after the orthogonal transformation is higher than a coefficient density. | 06-19-2014 |
20140177723 | IMAGE ENCODING METHOD AND IMAGE DECODING METHOD - According to one embodiment, an image encoding method includes selecting a motion reference block from an already-encoded pixel block. The method includes selecting an available block including different motion information from the motion reference block, and selecting a selection block from the available block. The method includes generating a predicted image of the encoding target block using motion information of the selection block. The method includes encoding a prediction error between the predicted image and an original image. The method includes encoding selection information identifying the selection block by referring to a code table decided according to a number of the available block. | 06-26-2014 |
20140177724 | IMAGE ENCODING METHOD AND IMAGE DECODING METHOD - According to one embodiment, an image encoding method includes selecting a motion reference block from an already-encoded pixel block. The method includes selecting an available block including different motion information from the motion reference block, and selecting a selection block from the available block. The method includes generating a predicted image of the encoding target block using motion information of the selection block. The method includes encoding a prediction error between the predicted image and an original image. The method includes encoding selection information identifying the selection block by referring to a code table decided according to a number of the available block. | 06-26-2014 |
20140177725 | IMAGE ENCODING METHOD AND IMAGE DECODING METHOD - According to one embodiment, an image encoding method includes selecting a motion reference block from an already-encoded pixel block. The method includes selecting an available block including different motion information from the motion reference block, and selecting a selection block from the available block. The method includes generating a predicted image of the encoding target block using motion information of the selection block. The method includes encoding a prediction error between the predicted image and an original image. The method includes encoding selection information identifying the selection block by referring to a code table decided according to a number of the available block. | 06-26-2014 |
20140177727 | VIDEO ENCODING APPARATUS AND VIDEO DECODING APPARATUS - A video encoding apparatus is a video encoding apparatus for subjecting a video image to motion compensated prediction coding, comprising an acquisition module to acquire available blocks of blocks having motion vectors from encoded blocks adjacent to a to-be-encoded block and number of the available blocks, an acquisition/selection module to select one selection block from the encoded available blocks, a selection information encoder to encode selection information specifying the selection block using a code table corresponding to the number of available blocks, and an image encoder to subject the to-be-encoded block to motion compensated prediction coding using a motion vector of the selection block. | 06-26-2014 |
20140185683 | VIDEO ENCODING APPARATUS AND A VIDEO DECODING APPARATUS - A video encoding apparatus is a video encoding apparatus for subjecting a video image to motion compensated prediction coding, comprising an acquisition module to acquire available blocks of blocks having motion vectors from encoded blocks adjacent to a to-be-encoded block and number of the available blocks, an acquisition/selection module to select one selection block from the encoded available blocks, a selection information encoder to encode selection information specifying the selection block using a code table corresponding to the number of available blocks, and an image encoder to subject the to-be-encoded block to motion compensated prediction coding using a motion vector of the selection block. | 07-03-2014 |
20140185684 | VIDEO ENCODING APPARATUS AND VIDEO DECODING APPARATUS - A video encoding apparatus is a video encoding apparatus for subjecting a video image to motion compensated prediction coding, comprising an acquisition module to acquire available blocks of blocks having motion vectors from encoded blocks adjacent to a to-be-encoded block and number of the available blocks, an acquisition/selection module to select one selection block from the encoded available blocks, a selection information encoder to encode selection information specifying the selection block using a code table corresponding to the number of available blocks, and an image encoder to subject the to-be-encoded block to motion compensated prediction coding using a motion vector of the selection block. | 07-03-2014 |
20140185685 | VIDEO ENCODING APPARATUS AND A VIDEO DECODING APPARATUS - A video encoding apparatus is a video encoding apparatus for subjecting a video image to motion compensated prediction coding, comprising an acquisition module to acquire available blocks of blocks having motion vectors from encoded blocks adjacent to a to-be-encoded block and number of the available blocks, an acquisition/selection module to select one selection block from the encoded available blocks, a selection information encoder to encode selection information specifying the selection block using a code table corresponding to the number of available blocks, and an image encoder to subject the to-be-encoded block to motion compensated prediction coding using a motion vector of the selection block. | 07-03-2014 |
20140192888 | VIDEO ENCODING APPARATUS AND VIDEO DECODING APPARATUS - A video encoding apparatus is a video encoding apparatus for subjecting a video image to motion compensated prediction coding, comprising an acquisition module to acquire available blocks of blocks having motion vectors from encoded blocks adjacent to a to-be-encoded block and number of the available blocks, an acquisition/selection module to select one selection block from the encoded available blocks, a selection information encoder to encode selection information specifying the selection block using a code table corresponding to the number of available blocks, and an image encoder to subject the to-be-encoded block to motion compensated prediction coding using a motion vector of the selection block. | 07-10-2014 |
20140369618 | ENCODING DEVICE AND MONITORING SYSTEM - According to an embodiment, an encoding device includes an area setting unit, a parameter controller, and an encoder. The area setting unit is configured to, in an image captured by an imager mounted on a vehicle while the vehicle is moving along a predetermined route, set a boundary in the image at a predetermined distance from the imager, a first area being an area inside of the boundary, and a second area being an area outside of the boundary. The parameter controller is configured to control an encoding parameter to assign a larger code amount to the first area than to the second area. The encoder is configured to encode the image in accordance with the encoding parameter. | 12-18-2014 |