Patent application number | Description | Published |
20090310677 | IMAGE ENCODING AND DECODING METHOD AND APPARATUS - An image encoding apparatus includes a first selector selecting a prediction-order to sub-blocks obtained by further dividing pixel-blocks obtained by dividing a frame of an input-image-signal from predetermined prediction-orders, a second selector selecting, from prediction-modes regulating a manner of referring to an encoded-pixel when a first-prediction-signal of each-sub-block is generated with reference to the encoded-pixel, the number of prediction-modes used in prediction of the first-prediction-signal, a third selector selecting prediction-modes the number of which is the selected number from prediction-modes to use the prediction-modes in prediction of the first-prediction-signal, a generator generating the first-prediction-signal in the selected prediction order by using the selected prediction-modes the number of which is the selected number to generate a second-prediction-signal corresponding to the pixelblock, and an encoder encoding a prediction-residual-error-signal expressing a difference between an image-signal of the pixel-block and the second-prediction-signal to generate encoded data obtained by the prediction-encoding. | 12-17-2009 |
20100086028 | VIDEO ENCODING AND DECODING METHOD AND APPARATUS - A video encoding apparatus includes a predictor to perform prediction for an input image signal to generate a prediction image signal, a subtractor to calculate a difference between the input image signal and the prediction image signal to generate a prediction residual signal, a transformer to transform the prediction residual signal to generate a transform coefficient, a modulating unit to perform modulation on a quantization matrix to obtain a modulated quantization matrix, a quantizer to quantize the transform coefficient using the modulated quantization matrix to generate a quantized transform coefficient, and an encoder to encode the quantized transform coefficient and a modulation index to generate encoded data. | 04-08-2010 |
20100118943 | METHOD AND APPARATUS FOR ENCODING AND DECODING IMAGE - An image encoding apparatus includes a multidirectional predicting unit configured to predict a plurality of pixel blocks by using an encoded pixel as a reference pixel according to a plurality of prediction modes having different prediction directions to generate a plurality of first prediction signals corresponding to the pixel blocks obtained by dividing a frame of an input image signal a setting unit configured to set a weighting factor depending on the prediction directions of the plurality of prediction modes and a spatial distance between a prediction pixel in the pixel block and the reference pixel, a weighted average unit configured to calculate a weighted average of the plurality of first prediction signals according to the weighting factor to generate one second prediction signal corresponding to the pixel blocks, and an encoding unit configured to encode a prediction residual error signal representing a difference between an image signal of the pixel block and at least the second prediction signal to generate encoded data. | 05-13-2010 |
20100118945 | METHOD AND APPARATUS FOR VIDEO ENCODING AND DECODING - An video encoding apparatus includes a dividing unit | 05-13-2010 |
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 |
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 |
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 |
20130107955 | MOVING-PICTURE ENCODING APPARATUS AND MOVING-PICTURE DECODING APPARATUS | 05-02-2013 |
20130128972 | IMAGE ENCODING APPARATUS AND IMAGE DECODING APPARATUS - According to one embodiment, an image encoding apparatus includes a setting unit configured to set a combination of a vertical transform matrix and a horizontal transform matrix corresponding to the target image. The combination includes any of a plurality of transform matrices including a first transform matrix and a second transform matrix which increases a coefficient density compared to the first transform matrix if a one-dimensional orthogonal transformation in a direction orthogonal to a line of a group of reference pixels on at least one line is performed on the prediction error in the intra-prediction mode in which the group of reference pixels is referenced to generate an intra-prediction image. | 05-23-2013 |
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 |
20140105295 | MOVING IMAGE ENCODING METHOD AND APPARATUS, AND MOVING IMAGE DECODING METHOD AND APPARATUS - According to one embodiment, there is provided a moving image encoding method for performing an inter prediction. The method includes acquiring first predicted motion information and second predicted motion information from an encoded region including blocks including motion information and generating, if a first condition is satisfied, a predicted image of a target block using one of (1) the first predicted motion information and third predicted motion information, the third predicted motion information being acquired from the encoded region and being different from the first predicted motion information and the second predicted motion information, and (2) one of the first predicted motion information and the second predicted motion information. | 04-17-2014 |
20140169460 | IMAGE ENCODING APPARATUS AND IMAGE DECODING APPARATUS - According to one embodiment, an image encoding apparatus includes a setting unit configured to set a combination of a vertical transform matrix and a horizontal transform matrix corresponding to the target image. The combination includes any of a plurality of transform matrices including a first transform matrix and a second transform matrix which increases a coefficient density compared to the first transform matrix if a one-dimensional orthogonal transformation in a direction orthogonal to a line of a group of reference pixels on at least one line is performed on the prediction error in the intra-prediction mode in which the group of reference pixels is referenced to generate an intra-prediction image. | 06-19-2014 |
20140169461 | IMAGE ENCODING APPARATUS AND IMAGE DECODING APPARATUS - According to one embodiment, an image encoding apparatus includes a setting unit configured to set a combination of a vertical transform matrix and a horizontal transform matrix corresponding to the target image. The combination includes any of a plurality of transform matrices including a first transform matrix and a second transform matrix which increases a coefficient density compared to the first transform matrix if a one-dimensional orthogonal transformation in a direction orthogonal to a line of a group of reference pixels on at least one line is performed on the prediction error in the intra-prediction mode in which the group of reference pixels is referenced to generate an intra-prediction image. | 06-19-2014 |
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 |
20140185666 | APPARATUS AND METHOD FOR MOVING IMAGE ENCODING AND APPARATUS AND METHOD FOR MOVING IMAGE DECODING - According to certain embodiment, there is provided a moving image encoding apparatus in which a first encoding unit performs a first encoding process on an input image to generate first encoded data and to perform a first decoding process on the first encoded data to generate a first decoded image, a difference calculating unit generates a difference image between the input image and the first decoded image, a first pixel range converting unit converts pixel values of the difference image to be within a first specific range to generate a first converted image, a second encoding unit performs a second encoding process on the first converted image to generate second encoded data, the second encoding process being different from the first encoding process and the first specific range is a range including a range of pixel values that can be encoded by the second encoding unit. | 07-03-2014 |
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 |
20140205018 | IMAGE PROCESSING APPARATUS, IMAGE ENCODING APPARATUS, AND IMAGE PROCESSING METHOD - According to an embodiment, an image processing apparatus includes a first decoding unit, a selection unit and a generation unit. The first decoding unit generates a first decoded image by decoding first encoded data. The selection unit selects one of the first decoded image and the second decoded image for each display timing. The generation unit generates a display image to be displayed at a display timing for which the first decoded image is selected, based on the first decoded image. The second decoded image has a higher resolution than that of the first decoded image. The first decoded image and the second decoded image are different in either a frame rate or a display timing phase. | 07-24-2014 |
20140247890 | ENCODING DEVICE, ENCODING METHOD, DECODING DEVICE, AND DECODING METHOD - According to an embodiment, an encoding device includes a first encoder, a filter processor, a difference image generating unit, and a second encoder. The first encoder encodes an input image by a first encoding process to obtain first encoded data. The filter processor filters a first decoded image included in the first encoded data by cutting off a specific frequency band of frequency components to obtain a base image. The difference image generating unit generates a difference image between the input image and the base image. The second encoder encodes the difference image by a second encoding process to obtain second encoded data. | 09-04-2014 |