Patent application number | Description | Published |
20150152982 | THICK-WALLED HIGH-STRENGTH SOUR-RESISTANT LINE PIPE AND METHOD FOR PRODUCING SAME - A line pipe and a production method therefor are provided. The microstructure in the pipe thickness direction contains 90% or more bainite in a region that extends from a position 2 mm from an inner surface to a position 2 mm from an outer surface. In a hardness distribution in the pipe thickness direction, the hardness in a region other than a center segregation area is 220 Hv10 or less and the hardness in the center segregation area is 250 Hv0.05 or less. The major axes of pores, inclusions, and inclusion clusters that are present in a portion that extends from a position 1 mm from the inner surface to a 3/16 position of the tube thickness and in a portion that extends from a position 1 mm from the outer surface to a 13/16 position of the tube thickness in the tube thickness direction are 1.5 mm or less. A continuous casting slab having the above-described composition is hot-rolled under particular conditions and then subjected to accelerated cooling. | 06-04-2015 |
20150176727 | THICK, HIGH-STRENGTH, SOUR-RESISTANT LINE PIPE AND METHOD FOR PRODUCING SAME - A line pipe having a wall thickness of 20 mm or more and a tensile strength of 560 MPa or more and a production method therefor are provided. The base metal portion contains particular amounts of C, Si, Mn, P, S, Al, Nb, Ca, N, and O, one or more component selected from Cu, Ni, Cr, Mo, V, and Ti as optional components, and the balance being Fe and unavoidable impurities. The microstructure in the pipe thickness direction contains 90% or more bainite and 1% or less of MA in a region that extends from a position 2 mm from an inner surface to a position 2 mm from an outer surface. In a hardness distribution in the pipe thickness direction, the hardness in a region other than a center segregation area is 220 Hv10 or less and the hardness in the center segregation area is 250 Hv10 or less. The major axes of pores, inclusions, and inclusion clusters that are present in a portion that extends from, a position 1 mm from the inner surface to a 3/16 position of the tube thickness and in a portion that extends from a position 1 mm from the outer surface to a 13/16 position of the tube thickness in the tube thickness direction are 1.5 mm or less. | 06-25-2015 |
Patent application number | Description | Published |
20120285576 | WELDED STEEL PIPE FOR LINEPIPE WITH HIGH COMPRESSIVE STRENGTH AND MANUFACTURING METHOD THEREOF - Provided are a steel pipe for a linepipe with high compressive strength and a heavy wall thickness, and a method of manufacturing the same. Lowering of yield stress caused by a Bauschinger effect can be suppressed by optimizing the metal microstructure of a steel plate without requiring particular forming conditions in forming the steel pipe, and without requiring heat treatment after pipe making. A steel pipe has the composition which contains by mass % 0.03 to 0.10% C, 0.30% or less Si, 1.00 to 2.00% Mn, 0.015% or less P, 0.003% or less S, 0.080% or less Al, 0.005 to 0.035% Nb, 0.005 to 0.020% Ti, and Fe and unavoidable impurities as a balance. The steel pipe has metal microstructure where a fraction of bainite is 60% or more, a fraction of rolled ferrite is 5% or less, and a fraction of M-A constituent (MA) is 3% or less. | 11-15-2012 |
20120305122 | WELDED STEEL PIPE FOR LINEPIPE HAVING HIGH COMPRESSIVE STRENGTH AND HIGH FRACTURE TOUGHNESS AND MANUFACTURING METHOD THEREOF - Provided are a steel pipe for a linepipe having a heavy wall thickness and excellent fracture toughness in a base material, and methods of producing the same. A welded heat affected zone is achieved by suppressing lowering of yield stress caused by a Bauschinger effect by optimizing the metal microstructure of a steel plate. A steel pipe has a composition which contains by mass % 0.03 to 0.08% C, 0.10% or less Si, 1.00 to 2.00% Mn, 0.010% or less P, 0.0030% or less S, 0.06% or less Al, 0.005 to 0.020% Nb, 0.005 to 0.025% Ti, 0.0010 to 0.0060% N, and Fe and unavoidable impurities as a balance. Ti(%)/N(%) is a value which falls within a range of 2 to 4, and a Ceq value is 0.30 or more. | 12-06-2012 |
20130000793 | WELDED STEEL PIPE FOR LINEPIPE HAVING HIGH COMPRESSIVE STRENGTH AND EXCELLENT SOUR GAS RESISTANCE AND MANUFACTURING METHOD THEREOF - Provided is a steel pipe for a linepipe having high compressive strength, a heavy wall thickness and sour gas resistance. The steel pipe has the composition which contains by mass % 0.02 to 0.06% C, 0.01 to 0.5% Si, 0.8 to 1.6% Mn, 0.012% or less P, 0.0015% or less S, 0.01 to 0.08% Al, 0.005 to 0.050% Nb, 0.005 to 0.025% Ti, 0.0005 to 0.0035% Ca, 0.0020 to 0.0060% N, and Fe and unavoidable impurities as a balance. The steel pipe has metal microstructure where a fraction of bainite is 80% or more, a fraction of M-A constituent is 2% or less and an average grain size of bainite is 5 μm or less. | 01-03-2013 |
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 |
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 |
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 |
20150264388 | 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. | 09-17-2015 |
20150319445 | 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. | 11-05-2015 |
20160050428 | 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. | 02-18-2016 |
Patent application number | Description | Published |
20090316791 | VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding apparatus comprises a frame memory/predictive image generator having a first predictive mode for generating a predictive image signal by selecting a combination from among a plurality combinations of a reference image number and a plurality of predictive parameters, and a second predictive mode for generating a predictive image signal according to a predictive parameter computed based on reference image numbers of reference images and an image-to-image distance, and a variable-length encoder to select one of the first and second prediction modes by the number of reference images, and encode orthogonal transformation coefficient information concerning a predictive error signal of a predictive image signal with respect to input video signal, mode information indicating an encoding mode, motion vector information and combination of selected reference image number with predictive parameter index information indicating combination of selected reference image information. | 12-24-2009 |
20090323805 | VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding apparatus comprises a frame memory/predictive image generator having a first predictive mode for generating a predictive image signal by selecting a combination from among a plurality combinations of a reference image number and a plurality of predictive parameters, and a second predictive mode for generating a predictive image signal according to a predictive parameter computed based on reference image numbers of reference images and an image-to-image distance, and a variable-length encoder to select one of the first and second prediction modes by the number of reference images, and encode orthogonal transformation coefficient information concerning a predictive error signal of a predictive image signal with respect to input video signal, mode information indicating an encoding mode, motion vector information and combination of selected reference image number with predictive parameter index information indicating combination of selected reference image information. | 12-31-2009 |
20090323816 | VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding apparatus comprises a frame memory/predictive image generator having a first predictive mode for generating a predictive image signal by selecting a combination from among a plurality combinations of a reference image number and a plurality of predictive parameters, and a second predictive mode for generating a predictive image signal according to a predictive parameter computed based on reference image numbers of reference images and an image-to-image distance, and a variable-length encoder to select one of the first and second prediction modes by the number of reference images, and encode orthogonal transformation coefficient information concerning a predictive error signal of a predictive image signal with respect to input video signal, mode information indicating an encoding mode, motion vector information and combination of selected reference image number with predictive parameter index information indicating combination of selected reference image information. | 12-31-2009 |
20090323817 | VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding apparatus comprises a frame memory/predictive image generator having a first predictive mode for generating a predictive image signal by selecting a combination from among a plurality combinations of a reference image number and a plurality of predictive parameters, and a second predictive mode for generating a predictive image signal according to a predictive parameter computed based on reference image numbers of reference images and an image-to-image distance, and a variable-length encoder to select one of the first and second prediction modes by the number of reference images, and encode orthogonal transformation coefficient information concerning a predictive error signal of a predictive image signal with respect to input video signal, mode information indicating an encoding mode, motion vector information and combination of selected reference image number with predictive parameter index information indicating combination of selected reference image information. | 12-31-2009 |
Patent application number | Description | Published |
20150117525 | APPARATUS AND METHOD FOR ENCODING IMAGE - According to an embodiment, an encoding apparatus includes a processor and a memory. The memory stores processor-executable instructions that, when executed by the processor, cause the processor to: divide an image included in an image group into a plurality of regions; calculate a priority for each of the regions on the basis of levels of importance of the regions; determine an order of processing for the regions on the basis of the corresponding priority; and encode the regions according to the determined order of processing. | 04-30-2015 |
20150131748 | ENCODING DEVICE AND ENCODING METHOD - According to an embodiment, an encoding device includes a processor and a memory. The processor applies a filter to first and second images included in moving image (video) data. The processor encodes the first and second images to which the filter has been applied and generates encoded data. The processor generates, on the basis of an encoding completion target time of the first image included in the moving image data, a target value of an encoding time spent for encoding the second image to be encoded after the first image. The processor controls the applying of the filter for the second image depending on the target value of the encoding time. | 05-14-2015 |
20160065993 | VIDEO COMPRESSION APPARATUS AND VIDEO PLAYBACK APPARATUS - According to an embodiment, a video compression apparatus includes a first compressor, a second compressor, a partitioner and a communicator. The first compressor compresses a first video to generate a first bitstream. The second compressor sets regions in a second video and compresses the regions so as to enable each region to be independently decoded, to generate a second bitstream. The partitioner partitions the second bitstream according to the set regions to obtain a partitioned second bitstream. The communicator receives region information indicating a specific region that corresponds to one or more regions and selects and transmits a bitstream corresponding to the specific region from the partitioned second bitstream. | 03-03-2016 |
20160080455 | DELIVERY DEVICE, REPRODUCTION DEVICE, AND DELIVERY SYSTEM - A reproduction system according to an embodiment includes a communicator which communicates information including an encoded data and a processor. The processor is configured to select the encoded data to be delivered, send a request an external delivery device to deliver a third encoded data until a starting time of following segment included in a second encoded data via the communicator when the second encoded data is selected to be delivered following to a first encoded data, and decode the encoded data received by the communicator. The second encoded data and the third encoded data are generated by encoding a first content. | 03-17-2016 |
20160088294 | ENCODING DEVICE, DECODING DEVICE, STREAMING SYSTEM, AND STREAMING METHOD - According to an embodiment, an encoding device includes an encoder. The encoder is configured to generate a video stream. The video stream includes at least a first image group including a plurality of images encoded at a first bit rate and a second image group including a plurality of images. The first image group includes an intra-coded image. The plurality of images of the second image group are associated with the intra-coded image serving as a reference image to decode an inter-coded image, and are encoded at a second bit rate different from the first bit rate and having reproduction timing in synchronization with the plurality of images of the first image group. | 03-24-2016 |
20160100216 | REPRODUCTION DEVICE, ENCODING DEVICE, AND REPRODUCTION METHOD - According to an embodiment, a reproduction device includes an acquirer, a decoder, and a synthesizer. The acquirer is configured to acquire transmission information including first and second coded data. The first and second coded data are generated by encoding first and second image data, respectively. At least one of the first and the second image data is lossy encoded. The first and second image data being generated by performing conversion processes different from each other on original image data. The decoder is configured to decode the first and second coded data to generate first and second decoded data. The synthesizer is configured to synthesize the first and the second decoded data with adjusting pixel positions of the first and the second decoded data so that the pixel positions of the first and the second decoded data are identical to each other to generate reproduction image data. | 04-07-2016 |
20160127728 | VIDEO COMPRESSION APPARATUS, VIDEO PLAYBACK APPARATUS AND VIDEO DELIVERY SYSTEM - According to an embodiment, a video compression apparatus includes a controller. The controller controls, based on a first random access point included in the first bitstream, a second random access point included in a second bitstream corresponding to compressed data of the second video. The second bitstream is formed from a plurality of picture groups. Each of the plurality of picture groups includes at least one picture subgroup. The controller selects, from the second bitstream, an earliest picture subgroup on or after the first random access point in display order and sets an earliest picture of the selected picture subgroup in coding order as the second random access point. | 05-05-2016 |
20160142715 | IMAGE ENCODING APPARATUS, IMAGE DECODING APPARATUS AND IMAGE TRANSMISSION METHOD - According to an embodiment, an image encoding apparatus includes a background control information generator, a background image generator, and an image encoder. The background control information generator generates background control information based on an input image. The background control information is used for generating a first background image from at least one first image. The background image generator generates the first background image, based on the background control information and at least one first image. The image encoder encodes the input image using the first background image to generate encoded data. | 05-19-2016 |
Patent application number | Description | Published |
20100112186 | SEASONING COMPOSITIONS, SALT-LIKE TASTE ENHANCER AND METHOD FOR ENHANCING SALT-LIKE TASTE OF FOOD AND DRINK - The present invention relates to a method for enhancing salty taste-like taste of food and drink, as well as providing a seasoning composition and a salty taste-like taste enhancer to be provided to the method. The present invention provides a seasoning composition including a 5′-ribonucleotide and a branched-chain amino acid; the seasoning composition and the salty taste-like taste enhancer containing 0.45 to 81 parts by weight of the branched-chain amino acid relative to 100 parts by weight of the 5′-ribonucleotide; and a method for enhancing salty taste-like taste of food and drink containing 2 to 90 parts by weight of the 5′-ribonucleotide and 0.05 to 9 parts by weight of the branched-chain amino acid. | 05-06-2010 |
20120128862 | METHOD FOR SUPPRESSING THE ACRID TASTE AND/OR METALLIC TASTE DERIVED FROM POTASSIUM CHLORIDE - There are provided a method by which the acrid taste and/or metallic taste of potassium chloride which is added to food compositions for the purpose of manufacturing low- or reduced-salt products is suppressed in a safe and economical manner without compromising the palatability of the food compositions, as well as an agent for use in this method to suppress the acrid taste and/or metallic taste derived from potassium chloride. The agent contains a yeast-derived peptide containing composition as the active ingredient. The invention is also useful for salt reduction and for the treatment of diseases or conditions that are associated with excessive salt intake, as well as diseases or conditions that can be improved by reducing salt intake. | 05-24-2012 |
20120201944 | AGENTS FOR IMPROVING THE TASTE AND FLAVOR OF CHOCOLATE - An agent for improving the eating quality of chocolate products is disclosed; it comprises as an active ingredient a yeast extract comprising (a) free glutamic acid in an amount of at least 10 wt % (preferably at least 15%) as calculated for sodium glutamate, (b) disodium 5′-inosinate and disodium 5′-guanylate in a total amount of at least 1 wt % (preferably at least 1.5 wt %), and (c) 2-furanmethanol and/or 5-methyl-2-furanmethanol. | 08-09-2012 |
20130243934 | AROMA COMPONENTS FOR IMPROVING EGG FLAVOR, AND EGG FLAVOR ENHANCERS - The present invention provides agent for enhancing egg aroma comprising at least one component(s) as an ingredient selected from the group consisting of: (a) 3-(methylthio)1-propanol, (b) benzaldehyde, (c) 4-heptanol, (d) trimethylpyrazine, (e) methylpyrazine, or (f) 2,5-dimethylpyrazine. The agent of the present invention is used for enhancing egg aroma, especially an egg flavor, of an egg product. The examples of preferred egg products to which the present invention is applied include, but not limited to, a boiled egg itself, various food products using a boiled egg (for example, tartar sauce, prepared bread filling, and so on), various food products containing an egg as a component (for example, mayonnaise, dressing, pasta sauce, Japanese omelette, steamed egg custard, steamed egg hotchpotch, omelette, quiche, rolled omelette, noodles, fried rice, custard cream, pudding, cake, sponge cake, ice cream, egg (custard) tart, bread, crape, and so on). | 09-19-2013 |
Patent application number | Description | Published |
20110176955 | HEAT-RESISTANT MAGNESIUM ALLOY - A heat-resistant magnesium alloy according to the present invention has Mg as the major component, includes Al, Ca and Mg, and has a metallic structure that comprises Mg crystalline grains and grain-boundary crystallized substances being crystallized out in a grain boundary between the Mg crystalline particles. The grain-boundary crystallized substances comprise a mixed crystal phase of a Laves-phase compound with a type-“C14” crystalline structure, and another Laves-phase compound with a type-“C36” crystalline structure. Moreover, a relative angle between a normal vector to the hexagonal-system basal plane of the Mg crystalline grains and another normal vector to the hexagonal-system basal plane of the grain-boundary crystallized substances is from 88 deg. to 92 deg. at an interface between the Mg crystalline grains and the grain-boundary crystallized substances at least. The present magnesium alloy exhibits high mechanical characteristics in high-temperature atmospheres, because it has the metallic structure in which a basal-plane slip is much less likely to occur than ever before, and because the basal-plane slip is less likely to occur even at high temperatures. | 07-21-2011 |
20110192507 | IRON ALLOY, IRON-ALLOY MEMBER, AND PROCESS FOR MANUFACTURING THE SAME - An iron alloy according to the present invention comprises: Al in an amount of from 3 to 5.5%; Mn in an amount from 0.2 to 6%; and the balance being iron (Fe), and inevitable impurities and/or a modifying element; when the entirety is taken as 100%. Since a high damping factor is obtainable at a low-strain amplitude, this iron alloy demonstrates a stable damping property even in a high-temperature region. Moreover, since the alloying elements are Al and Mn alone, and since their contents are less, the iron alloy according to the present invention is low in cost. | 08-11-2011 |
20110220251 | MAGNESIUM ALLOY AND MAGNESIUM-ALLOY CAST PRODUCT - A magnesium alloy according to the present invention comprises: Al in an amount of from 2 to 6%; Ca in an amount making a compositional ratio (i.e., Ca/Al) being from 0.5 to 1.5; Mn in an amount of from 0.1 to 0.7%; strontium (Sr) in an amount of from 1 to 6%; and the balance being magnesium (Mg), and inevitable impurities and/or a modifying element; when the entirety is taken as 100% by mass. By means of this setting, Mg alloys, which are also good in terms of high-temperature characteristics, such as creep resistance and heat conductivity, in addition to ordinary-temperature characteristics, are obtained. | 09-15-2011 |
Patent application number | Description | Published |
20080257516 | PRESSURE VESSEL, COMPRESSOR AND PROCESS FOR CASTING CYLINDER BLOCK - A pressure vessel of the present invention is such that at least part thereof comprises a metallic composite material | 10-23-2008 |
20080261067 | Metallic Composite Material - A metallic composite material according to the present invention is a metallic composite material, which comprises: a composited portion having a sintered body | 10-23-2008 |
20090136377 | Process for producing aluminum composite material - The present invention is such that it is an assignment to be solved to provide a process for producing aluminum composite material in which an iron sintered body of much higher adhesion is cast-in inserted with aluminum. | 05-28-2009 |
20090305917 | Sliding Material and Sliding Member Using the Sliding Material - To provide a sliding material whose superficial sliding characteristics can be modified in compliance with the requirements of sliding component parts without ever changing the surface roughness of sliding material very much by means of shot blasting treatment, and to provide a sliding member using the sliding material. | 12-10-2009 |
20100116378 | HEAT-RESISTANT MAGNESIUM ALLOY - A heat-resistant magnesium alloy according to the present invention includes Mg, a major component; a first alloying element “M | 05-13-2010 |
20100119405 | MAGNESIUM ALLOY FOR CASTING AND MAGNESIUM-ALLOY CAST PRODUCT - A magnesium alloy for casting according to the present invention is characterized in that, when the entirety is taken as 100% by mass, it includes copper (Cu) in an amount of from 1% by mass or more to 5% by mass or less, calcium (Ca) in an amount of from 0.1% by mass or more to 5% by mass or less, silver (Ag) in an amount of from 0.1% by mass or more to 5% by mass or less, and the balance comprising magnesium (Mg) and inevitable impurities. | 05-13-2010 |
20100209285 | MAGNESIUM ALLOY FOR CASTING AND MAGNESIUM-ALLOY CAST PRODUCT - A magnesium alloy for casting according to the present invention is characterized in that, when the entirety is taken as 100% by mass, it includes copper (Cu) in an amount of from 1% by mass or more to 5% by mass or less, calcium (Ca) in an amount of from 0.1% by mass or more to 5% by mass or less, tin (Sn) in an amount of from 0.1 or more to 3 or less by mass ratio with respect to the Ca (Sn/Ca); and the balance comprising magnesium (Mg) and inevitable impurities. | 08-19-2010 |
Patent application number | Description | Published |
20150036825 | COMMUNICATION APPARATUS, COMPUTER PROGRAM PRODUCT, AND COMMUNICATION SYSTEM - According to an embodiment, a communication apparatus includes a cryptographic key storage, a transmitter, a receiver, and a sharing controller. The cryptographic key storage stores therein one or more cryptographic keys shared with an external device. The transmitter transmits specifying information that specifies at least one of the cryptographic keys to the external device. The receiver receives determination information that indicates a result of determination, which is made by the external device based on the specifying information, on whether the shared cryptographic key is consistent between the apparatus and the external device. When receiving the determination information indicating that the shared cryptographic key is inconsistent between the apparatus and the external device, the sharing controller deletes the cryptographic key specified by the specifying information from the cryptographic key storage. | 02-05-2015 |
20150193306 | QUANTUM COMMUNICATION DEVICE, QUANTUM COMMUNICATION METHOD, AND COMPUTER PROGRAM PRODUCT - According to an embodiment, a quantum communication device includes a sift processor, an estimator, a determination unit, and a corrector. The sift processor is configured to acquire sift processing data by referring to a cryptographic key bit string in a predetermined bit string with a reference basis randomly selected from a plurality of bases via a quantum communication channel. The estimator is configured to acquire an estimated error rate of the sift processing data. The determination unit is configured to determine order of the sift processing data in which an error is to be corrected based on the estimated error rate and difference data between a processing speed of error correcting processing and a processing speed of privacy amplification processing. The corrector is configured to acquire one piece of the sift processing data in the order determined by the determination unit, and generate error correcting processing data. | 07-09-2015 |
20150195087 | QUANTUM COMMUNICATION DEVICE, QUANTUM COMMUNICATION METHOD, AND COMPUTER PROGRAM PRODUCT - According to an embodiment, a quantum communication device includes a receiver, a sift processor, an estimator, first and second storages, a determination unit, an error corrector, a measurement unit, and a privacy amplifier. The sift processor acquires sift processing data by referring to a cryptographic key bit string in a predetermined bit string with a reference basis randomly selected from a plurality of bases. The estimator acquires an estimated error rate by estimating an error rate of the sift processing data from an error rate of part of the sift processing data. When a sift processing data volume stored in the first storage is not smaller than a first threshold, the determination unit determines order of the sift processing data to be corrected based on an estimated error rate, an error rate range that a check matrix can correct, and estimated correction time, and the check matrix used for correction. | 07-09-2015 |
20150215122 | QUANTUM KEY DISTRIBUTION DEVICE, QUANTUM KEY DISTRIBUTION SYSTEM, AND QUANTUM KEY DISTRIBUTION METHOD - According to an embodiment, a quantum key distribution (QKD) device includes a sharing unit, a correcting unit, a deciding unit, a calculator, and a privacy amplifier. The sharing unit is configured to generate a shared bit string through quantum key distribution with each other QKD device connected via quantum communication channels. The correcting unit is configured to generate a corrected bit string through an error correction process on the shared bit string. The deciding unit is configured to calculate an error rate in the corresponding quantum communication channel with respect to each other QKD device, and decide on a combined error rate from error rates calculated. The calculator is configured to calculate, based on the combined error rate, a length of an encryption key to be shared. The privacy amplifier is configured to generate the encryption key having the calculated length of the encryption key from the corrected bit string. | 07-30-2015 |
20150236852 | QUANTUM KEY DISTRIBUTION DEVICE, QUANTUM KEY DISTRIBUTION SYSTEM, AND QUANTUM KEY DISTRIBUTION METHOD - According to an embodiment, a quantum key distribution device includes a key sharing unit, a correcting unit, a compressor, and a controller. The key sharing unit is configured to generate a shared bit string by using quantum key distribution performed with another quantum key distribution device via a quantum communication channel. The correcting unit is configured to generate a corrected bit string through an error correction process with respect to the shared bit string. The compressor is configured to generate an encryption key through a key compression process with respect to the corrected bit string. The controller is configured to perform a restraining operation in which the total number of bits of encryption keys generated per unit time by the compressor is smaller than the total number of bits of the encryption keys generated per unit time by the compressor in the case of not performing the restraining operation. | 08-20-2015 |
20150270959 | COMMUNICATION DEVICE, COMMUNICATION SYSTEM, AND COMMUNICATION METHOD - According to an embodiment, a communication device is connected to another communication device through an optical communication path to generate an identical cryptographic key shared among the communication devices. The communication device includes a key sharing unit, a key distilling unit, a measuring unit, and a varying unit. The key sharing unit is configured to generate a shared bit string through quantum key distribution with the another communication device. The key distilling unit is configured to generate the cryptographic key from the shared bit string by a key distillation process. The measuring unit is configured to measure an error rate occurring in a photon string transmitted and received via a photon communication channel. The varying unit is configured to vary, based on the error rate, a communication function by applying a limitation on the optical data communication of an optical data communication channel or by releasing the limitation. | 09-24-2015 |
20150270963 | COMMUNICATION DEVICE, COMMUNICATION METHOD, AND COMPUTER PROGRAM PRODUCT - According to an embodiment, a communication device includes a first manager, and a second manager, a first communication unit, a determination unit, a controller, and a second communication unit. The first manager shares a first cryptographic key with a first external device connected via a link. The second manager shares a second cryptographic key to be provided to an application, with the first external device and with a second external device connected via links. The first communication unit transmits the second cryptographic key to the first external device. The determination unit determines whether a device with which the second cryptographic key is to be shared is the first external device. If it is affirmative, the controller controls the second manager to share, as the second cryptographic key, a cryptographic key obtained by converting the first cryptographic key. The second communication unit provides the application with the second cryptographic key. | 09-24-2015 |
20150271147 | COMMUNICATION SYSTEM, COMMUNICATION APPARATUS, COMMUNICATION METHOD, AND COMPUTER PROGRAM PRODUCT - According to an embodiment, a communication system includes a plurality of communication apparatuses. Each of the communication apparatuses includes a key generator and a synchronization processor. The key generator generates shared keys shared with another communication apparatus. The synchronization processor synchronizes at least one of order of using the generated shared keys and roles played when the generated shared keys are used, with another communication apparatus based on a rule determined in advance. | 09-24-2015 |
20160142203 | QUANTUM KEY DISTRIBUTION DEVICE, QUANTUM KEY DISTRIBUTION SYSTEM, AND QUANTUM KEY DISTRIBUTION METHOD - According to an embodiment, a quantum key distribution device includes first and second operation units. The first operation unit is configured to perform a first operation as a key distillation operation. The first operation unit includes a hardware circuit for performing a part of the first operation. The key distillation operation includes a sifting operation for a photon bit string generated through quantum key distribution with another quantum key distribution device via a quantum communication channel. The second operation unit is configured to perform a second operation as a key distillation operation other than the first operation. The second operation unit includes a circuit for a part of the second operation. The first operation unit stores intermediate data generated by the first operation. The second operation unit generates, by the second operation, a cryptographic key being the same as for the another quantum key distribution device from the intermediate data. | 05-19-2016 |
Patent application number | Description | Published |
20090064281 | AUTHENTICATION DEVICE AND NETWORK AUTHENTICATION SYSTEM, METHOD FOR AUTHENTICATING TERMINAL DEVICE AND PROGRAM STORAGE MEDIUM - When an authentication identifier is contained in a first message required for receiving authentication with respect to IEEE 802.1X from a terminal device, the authentication is assumed to be successful and then a data link is established with the terminal device, and a filtering unit is set so as to pass a first packet which should be passed for receiving authentication with respect to a higher layer protocol from among packets sent from the terminal device through the data link and to block a second packet different from the first packet. If a second message required for receiving authentication with respect to the higher layer protocol from the terminal device is received through the filtering unit, the authentication with respect to the higher layer protocol is performed. When the authentication is successful, the filtering unit is set so as to pass the second packet. | 03-05-2009 |
20090300197 | Internet Protocol Communication System, Server Unit, Terminal Device, and Authentication Method - According to one embodiment, there is provided an Internet Protocol communication system provided with terminal devices configured to mutually communicate with one another via an IP network and a server unit which performs digest authentication in response to authentication requests transmitted from the terminal device. The server unit comprises an authentication processing module which transmits challenge values to terminal devices of authentication request sources, and verifies response values returned to the challenge values, and a determination module which determines results of the digest authentication on the basis of the results of the verification. At least one of the terminal devices comprises an authentication client module which generates the response values by using a defined algorithm in accordance with user passwords input by users, and with device passwords stored in advance, and returns the response values to the server unit. | 12-03-2009 |
20120242461 | COMMUNICATION APPARATUS - According to an embodiment, a communication apparatus controls controllable nodes. The apparatus includes an acquisition unit and a generation unit. The acquisition unit acquires at least one of a first evaluation value indicating an occurrence frequency of a control request to a target controllable node and a second evaluation value indicating an occurrence frequency of communication error at the target controllable node. The generation unit generates identification information to be assigned to control the target controllable node in a manner such that a bit length of the identification information becomes shorter as at least one of the first evaluation value and the second evaluation value increases. | 09-27-2012 |
20130083668 | COMMUNICATION DEVICE, COMMUNICATION METHOD, AND COMPUTER READABLE MEDIUM - In one embodiment, there is provided a communication device including: a storage configured to store transmission packets and expected reply results; a controller configured to transmit the transmission packets to a network and to detect reply results corresponding to the transmission packets from the network; and a determination module configured to determine whether or not each of the reply results matches a corresponding one of the expected reply results. When the determination module determines that a reply result corresponding to one of the transmission packets matches a corresponding expected reply result, the controller continues to transmit another one of the transmission packets to the network and to detect a reply result corresponding to said another one of the transmission packets. When the determination module determines that the reply result does not match the corresponding expected reply result, the controller stops transmitting the remaining transmission packets to the network. | 04-04-2013 |
20140089663 | COMMUNICATION METHOD, APPLICATION DEVICE, PROGRAM, AND COMMUNICATION SYSTEM - According to one embodiment, a communication method including acquiring an application key from a key-sharing network, determining a key use of the application key, and performing encryption communication by using the application key according to the determined key use. | 03-27-2014 |
20140095957 | DATA SHARING METHOD, TRANSMITTER, RECEIVER AND DATA SHARING SYSTEM - According to one embodiment, a transmitter includes a signal dividing unit, a syndrome sending unit, a syndrome receiving unit and a decoding unit. The signal dividing unit divides an original signal into a first signal and a second signal based on a common dividing policy. The syndrome sending unit sends the first syndrome message calculated based on the first signal through a clear channel. The syndrome receiving unit receives a second syndrome message through the clear channel. The decoding unit decodes the second signal by using the second syndrome message to restore a fourth signal, the fourth signal being corresponding to the second signal received by a receiver through a noisy channel. | 04-03-2014 |
20140143537 | COMMUNICATION APPARATUS AND COMMUNICATION METHOD - In general, according to one embodiment, a communication apparatus includes an obtaining unit, generation unit, and communication unit. The obtaining unit obtains a master key from a first communication apparatus. The generation unit generates an individual key using the master key. The communication unit communicates with a second communication apparatus using the individual key. | 05-22-2014 |
20140143867 | COMMUNICATION DEVICE, COMMUNICATION SYSTEM, AND COMPUTER PROGRAM PRODUCT - According to an embodiment, a communication device is connected to a plurality of external devices which share key information with each other. The communication device includes a detector and an instructing unit. The detector is configured to, from among the external devices, detect an external device that has been subject to attack. The instructing unit is configured to issue an instruction to stop using key information which is shared with the detected external device. | 05-22-2014 |
20140181522 | COMMUNICATION NODE, KEY SYNCHRONIZATION METHOD, AND KEY SYNCHRONIZATION SYSTEM - In general, according to one embodiment, a communication node includes a key synchronization controller and an application communicator. The key synchronization controller controls synchronization of an application key on the basis of a node-based signaling process and a session-based signaling process, where the former process is for starting or ending exchanging of an application key between a correspondent node and the communication node and the latter process is for synchronizing a rule for assignment of the application key to a session with the correspondent node, the session shared with the correspondent node. The application communicator provides the application key in accordance with the rule, the key for use by an application having the session. | 06-26-2014 |
20140208116 | COMMUNICATION APPARATUS, COMMUNICATION SYSTEM, AND COMPUTER PROGRAM PRODUCT - According to an embodiment, a communication apparatus includes a sharing processing unit, an extension unit, and a communication unit. The sharing processing unit shares a first cryptographic key with an external apparatus connected via a link, and further generates a second cryptographic key and shares the second cryptographic key with the external apparatus through secret communication using the first cryptographic key. The extension unit generates an extended key by extending a length of the second cryptographic key. The communication unit transmits the extended key to a first application which communicates with a second application to which the external apparatus provides the second cryptographic key. | 07-24-2014 |
20140289520 | COMMUNICATION DEVICE, COMMUNICATION SYSTEM, COMMUNICATION METHOD, AND COMPUTER PROGRAM PRODUCT - According to an embodiment, a communication device is connected to a first network and a second network. The communication device includes a generating unit and a converting unit. The generating unit is configured to generate a first set of route information that is route information of the first network. The converting unit is configured to convert the first set of route information, and generate a second set of route information that is route information of the second network. | 09-25-2014 |
20140365774 | COMMUNICATION DEVICE, COMMUNICATION METHOD, AND COMMUNICATION SYSTEM - According to an embodiment, a communication device includes a storage unit and a determiner. The storage unit is configured to store therein a degree of priority and a first requested volume for each of one or more applications that use an encryption key. The first requested volume indicates a volume of the encryption key requested by the each of applications. The determiner is configured to determine a volume of the encryption key to be assigned to each application in such a way that a first total value that is a total of the volume of the encryption key to be assigned to the application is equal to or smaller than a second total value that is a total value of a volume of the encryption key assignable and that the encryption key of the first requested volume is preferentially assigned to the application whose degree of priority is higher. | 12-11-2014 |
20140365786 | COMMUNICATION DEVICE, COMMUNICATION METHOD, COMPUTER PROGRAM PRODUCT, AND COMMUNICATION SYSTEM - According to an embodiment, a communication device includes an acquirer and a determiner. The acquirer is configured to acquire a first history value for each of one or more applications that use an encryption key. The first history value indicates a history value of a volume of the encryption key used by the each of one or more applications. The determiner is configured to determine a volume of the encryption key to be assigned to the corresponding application, according to the first history value. | 12-11-2014 |
20150036824 | TRANSMITTER, RECEIVER, QUANTUM KEY DISTRIBUTION (QKD) SYSTEM AND QUANTUM KEY DISTRIBUTION METHOD - According to an embodiment, a transmitter transmits first transmission key data and second transmission key data as quantum information. The transmitter includes a first privacy amplifier and a second privacy amplifier. The first privacy amplifier generates first secure key data by performing privacy amplification to remove information that has possibly been acquired by an eavesdropper of the first transmission key data on the first transmission key data. The second privacy amplifier generates second secure key data by performing the privacy amplification to remove information that has possibly been acquired by the eavesdropper of the second reception key data on the decoded key data. | 02-05-2015 |
Patent application number | Description | Published |
20120076139 | NODE, SWITCH, AND SYSTEM - According to one embodiment, a node is capable of conforming to one of a plurality of Ethernet standards and includes: an Ethernet controller unit that performs auto-negotiation with a switch to exchange information concerning an interface speed, to determine an interface speed to be used based on the information concerning the interface speed, and to receive information including a setting Ethernet standard set as an Ethernet standard to be used; a storage unit that stores a node's available Ethernet standard which is an Ethernet standard to which the node can conform; and a controller that performs setting such that the node operates using a coincident standard between the Ethernet standard stored in the storage unit and setting Ethernet standard and connects a link to the switch. | 03-29-2012 |
20120079297 | COMMUNICATION DEVICE, START NODE, SYSTEM, METHOD AND COMPUET PROGRAM PRODUCT - According to one embodiment, a communication device includes a start-up signal reception unit that receives a start-up signal that a start node transmits for starting up a node to be started; a first interface connected to Ethernet; a second interface connected to Ethernet; a power reception unit that receives PoE power through the first interface; a PoE controller that receives the start-up signal and PoE power and gives a transmission instruction of a start-up power signal which is a PoE power signal having a signal pattern corresponding to the start-up signal; and a power transmission unit that receives the transmission instruction from the PoE controller and transmits the start-up power signal through the second interface. | 03-29-2012 |
20130250826 | COMMUNICATIONS TERMINAL AND COMPUTER READABLE MEDIUM - An activation instructing portion to instruct an activation instruction to a communications module and a core module, when a receiver portion receives a activation signal, wherein upon reception of an activation instruction while in a halt mode, the core module switches from the halt mode to an operational mode, upon reception of the activation instruction while in a halt mode, the communications module switches from the halt mode to an operational mode, and sends a reception completion signal after switching to the operational mode, and a period of time needed for the communications module to switch to the operational mode after receiving the activation signal is shorter than that of the core module. | 09-26-2013 |
Patent application number | Description | Published |
20080284633 | A/D converter circuit and A/D conversion method - An A/D converter circuit uses first and second ring delay lines. The first and second ring delay lines are supplied with input signals, which increase/decrease oppositely from each other with respect to change directions. In each ring delay line, a first counter counts the number of times of circulation of a pulse signal circulating therein to find a digital data, and a last digital data is subtracted from a present digital data. By adding the resulting first and second digital data of the first and second ring delay lines, a digital data of the input voltage of linear characteristics is provided. | 11-20-2008 |
20080309542 | A/D converter circuit and A/D conversion method - An A/D converter circuit has a first ring delay line and a second ring delay line configured to vary respective characteristics in the same manner relative to a change in the ambient temperature. A reference voltage, which is free from a change in temperature, is fed as a power supply voltage to the second ring delay line. Digital data produced by the first ring delay line is temperature-compensated by digital data produced by the second ring delay line. | 12-18-2008 |
20090096524 | Differential amplification circuit and manufacturing method thereof - A differential amplification circuit and a method corrects an offset voltage derived from a variance in resistances. With first and second input terminals brought to the same potential and set to a potential different from a reference potential, the resistance value of resistors is adjusted so that an output potential and the reference potential will be substantially equal to each other. | 04-16-2009 |
20120075137 | A/D CONVERTER CIRCUIT - An A/D converter circuit includes first to fourth pulse circulation circuits and first and second counters and configured to provide high conversion accuracy irrespective of a temperature change. The first pulse circulation circuit operates with a difference voltage of a specified voltage and an analog input voltage. The first counter outputs a difference of the number of pulse circulation in the first and the second pulse circulation circuits. The third pulse circulation circuit operates with a difference voltage of the specified voltage and a set voltage. The fourth pulse circulation circuit operates with the set voltage. The second counter outputs a difference of the number of pulse circulation in the third and the fourth pulse circulation circuits. When an output value of the second counter reaches a specified value, an output value of the first counter at that time is outputted as A/D conversion data. | 03-29-2012 |
20150358027 | SENSOR SIGNAL PROCESSING APPARATUS AND SENSOR APPARATUS - In a sensor signal processing apparatus, a control unit executes at least one of a temperature measurement process and a calculation process in parallel with a signal conversion process. In the temperature measurement process, the control unit causes a second A/D converter to execute the A/D conversion of a temperature signal. In the calculation process, the control unit calculates an offset and a conversion gain of a first A/D converter base on an A/D conversion value output from the second A/D converter and pre-prepared temperature characteristic data of a physical quantity sensor. In the signal conversion process, the control unit sets the calculated offset and the calculated conversion gain to the first A/D converter, and causes the first A/D converter to execute the A/D conversion of the sensor signal. | 12-10-2015 |