Patents by Inventor Hirofumi Aoki

Hirofumi Aoki has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20160057442
    Abstract: A video encoding device includes: pixel bit length increasing means for increasing a pixel bit length of an input image based on pixel bit length increase information; transform means for transforming output data of the pixel bit length increasing means; entropy encoding means for entropy-encoding output data of the transform means; non-compression encoding means for non-compression-encoding input data; multiplexed data selection means for selecting output data of the entropy encoding means or output data of the non-compression encoding means; and multiplexing means for multiplexing the pixel bit length increase information in a bitstream, wherein a pixel bit length of an image corresponding to the output data of the entropy encoding means and a pixel bit length of an image corresponding to the output data of the non-compression encoding means are different from each other.
    Type: Application
    Filed: November 3, 2015
    Publication date: February 25, 2016
    Applicant: NEC CORPORATION
    Inventors: Keiichi CHONO, Yuzo SENDA, Junji TAJIME, Hirofumi AOKI, Kenta SENZAKI
  • Publication number: 20160057443
    Abstract: A video encoding device includes: pixel bit length increasing means for increasing a pixel bit length of an input image based on pixel bit length increase information; transform means for transforming output data of the pixel bit length increasing means; entropy encoding means for entropy-encoding output data of the transform means; non-compression encoding means for non-compression-encoding input data; multiplexed data selection means for selecting output data of the entropy encoding means or output data of the non-compression encoding means; and multiplexing means for multiplexing the pixel bit length increase information in a bitstream, wherein a pixel bit length of an image corresponding to the output data of the entropy encoding means and a pixel bit length of an image corresponding to the output data of the non-compression encoding means are different from each other.
    Type: Application
    Filed: November 3, 2015
    Publication date: February 25, 2016
    Applicant: NEC CORPORATION
    Inventors: Keiichi CHONO, Yuzo SENDA, Junji TAJIME, Hirofumi AOKI, Kenta SENZAKI
  • Patent number: 9258560
    Abstract: In the present invention, reconstructed images for prediction are stored in uncompressed reference picture memory and compressed reference picture memory. A video decoder stores in uncompressed reference picture memory a reconstructed image of a frame to be decoded which has been generated on the basis of a prediction, and among reconstructed images which have been stored in the uncompressed reference picture memory, compresses a reconstructed image that will not be used for prediction of the frame to be decoded and stores the image in the compressed reference picture memory. Using the reconstructed images which are stored in the uncompressed reference picture memory and the compressed reference picture memory, the video bitstream is decoded into a video.
    Type: Grant
    Filed: June 21, 2011
    Date of Patent: February 9, 2016
    Assignee: NEC CORPORATION
    Inventors: Junji Tajime, Hirofumi Aoki, Keiichi Chono, Yuzo Senda, Kenta Senzaki
  • Publication number: 20160029025
    Abstract: A video decoding device for decoding video using inter prediction comprises decoding control unit setting partition type of CU to be decoded to a type other than N×N which indicates a size of PU obtained by dividing a CU to be decoded is a minimum size, when a prediction mode of the CU to be decoded is an inter prediction and a size of the CU to be decoded is equal to a minimum CU size.
    Type: Application
    Filed: October 7, 2015
    Publication date: January 28, 2016
    Applicant: NEC CORPORATION
    Inventors: Kenta SENZAKI, Yuzo SENDA, Keiichi CHONO, Hirofumi AOKI
  • Patent number: 9210427
    Abstract: A video encoding device includes: pixel bit length increasing means for increasing a pixel bit length of an input image based on pixel bit length increase information; transform means for transforming output data of the pixel bit length increasing means; entropy encoding means for entropy-encoding output data of the transform means; non-compression encoding means for non-compression-encoding input data; multiplexed data selection means for selecting output data of the entropy encoding means or output data of the non-compression encoding means; and multiplexing means for multiplexing the pixel bit length increase information in a bitstream, wherein a pixel bit length of an image corresponding to the output data of the entropy encoding means and a pixel bit length of an image corresponding to the output data of the non-compression encoding means are different from each other.
    Type: Grant
    Filed: July 8, 2011
    Date of Patent: December 8, 2015
    Assignee: NEC CORPORATION
    Inventors: Keiichi Chono, Yuzo Senda, Junji Tajime, Hirofumi Aoki, Kenta Senzaki
  • Publication number: 20150330717
    Abstract: The purpose of this invention is to provide a sheet-shaped heat pipe that makes it possible to reduce a pressure loss caused by a vapor flow or a pressure loss caused by a working fluid flow to improve the maximum amount of heat to be transported and reduce thermal resistance by increasing the cross-sectional area of a vapor flow passage or a fluid flow passage, which has been limited by the length of a container in a height direction. A heat pipe (20) is provided with a protruding portion (24) so that the height of the wick-occupied portion (23) serving as the fluid flow passage is larger than the height of the space portion (22) serving as the vapor flow passage.
    Type: Application
    Filed: July 23, 2015
    Publication date: November 19, 2015
    Applicant: FURUKAWA ELECTRIC CO., LTD.
    Inventors: Hirofumi AOKI, Masami IKEDA, Yoshikatsu INAGAKI
  • Publication number: 20150183441
    Abstract: To provide an operation start index value calculating unit for calculating index values of operation start times according to operation contents of a driver who drives a vehicle, and a driving characteristics estimating unit for determining ratios of probability densities to total value thereof in respective probability density functions in the calculated index values, based on the respective probability density functions of every state of the operation start times to the index values of the operation start times and on the index values of the operation start times calculated by the operation start index value calculating unit, and for estimating the driving characteristics of the driver by weighting the ratios to the total values of the respective probability densities.
    Type: Application
    Filed: June 5, 2012
    Publication date: July 2, 2015
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Hirofumi Aoki
  • Publication number: 20150181240
    Abstract: A video encoder 101 encodes image data of an input moving image based on prediction and generates a video bitstream of encoded pictures. A refresh controller 102 refreshes such that a partial area in the picture is assumed as a unit area to be refreshed and the unit area to be refreshed is moved on a picture-by-picture basis. A display-enabled area encoder 103 encodes a display-enabled area for each picture and generating a display-enabled area information bitstream in refreshing. A multiplexer 104 multiplexes the video bitstream and the display-enabled area information bitstream.
    Type: Application
    Filed: May 31, 2013
    Publication date: June 25, 2015
    Inventors: Hirofumi Aoki, Keiichi Chono, Masato Tsukada
  • Publication number: 20150181213
    Abstract: A video encoding device includes a transformer for transforming an image block, an entropy encoder (103) for entropy encoding transformed data of the image block transformed by the transformer, a PCM encoder (1070) for PCM encoding the image block, and a multiplexed data selector (109) for selecting output data of any one of the entropy encoder (103) and the PCM encoder (1070) for each image block. The PCM encoder (1070) embeds, at the beginning of PCM data, a subsequent_pcm_flag syntax indicating whether an image block of PCM data follows or not.
    Type: Application
    Filed: May 31, 2013
    Publication date: June 25, 2015
    Inventors: Keiichi Chono, Hirofumi Aoki
  • Patent number: 9064419
    Abstract: A driver condition determination device determines whether a driver of a host vehicle has degraded consciousness. A main component for distribution of an accelerating operation condition with respect to proximity when tailgating a preceding vehicle is analyzed (S16), all data is origin-shifted (S18), and the accelerating operation condition of the driver when the driver has consciousness is created as a normal traveling model (S20). The likelihood of the accelerating operation condition, a likelihood average, a likelihood variance, and a likelihood threshold value are calculated (S22 to S26), and it is determined whether the likelihood of a current driving operation is lower than the likelihood threshold value (S28). When the likelihood is lower than the likelihood threshold value, the driver is determined as being in degraded consciousness.
    Type: Grant
    Filed: April 23, 2012
    Date of Patent: June 23, 2015
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Hirofumi Aoki, Kiyoto Hanita
  • Publication number: 20150013943
    Abstract: A heat pipe suited for thinning, and achieving high heat transport performance is provided. A heat pipe 1 according to the invention includes working liquid, a container 2 into which the working liquid is sealed, and a mesh member 3 disposed in such a position as to come into contact with at least two inner surfaces of the container, the two surfaces facing to each other. The mesh member 3 is formed by a plurality of meshes 31 and 32 laminated on each other. The porosity in the portion where the respective meshes 31 and 32 contact each other is lower than the porosity in the portion where the meshes 31 and 32 contact the container 2.
    Type: Application
    Filed: October 2, 2014
    Publication date: January 15, 2015
    Applicant: Furukawa Electric Co., Ltd.
    Inventors: Yoshikatsu INAGAKI, Hiroshi Sakai, Hirofumi Aoki, Masanobu Sugimura
  • Publication number: 20140360701
    Abstract: A sheet-like heat pipe for a heat-generating element, which is intended to make an electronic device more compact, more lightweight, and thinner, while also reducing costs, is provided. A sheet-like heat pipe (10) of the present invention includes a container (17) in which the peripheries of the sheet-like members (11, 12) disposed facing each other are bonded to form a cavity inside, and a working liquid which is enclosed in a cavity (15) of the container (17). At least one of the sheet-like members (11, 12) disposed facing each other is formed with protruding pieces (12A, 12B) which project outwards from the bonded part with the other sheet-like member and have a spring structure which causes the container (17) to elastically abut a heat-generating element (5) of an electronic device.
    Type: Application
    Filed: August 25, 2014
    Publication date: December 11, 2014
    Applicant: FURUKAWA ELECTRIC CO., LTD.
    Inventors: Hirofumi AOKI, Masami IKEDA
  • Publication number: 20140307790
    Abstract: A video encoding device includes a down-sampler with sampling position shifter 107 configured to down-sample a luminance signal, and a predictor 101 configured to linearly predict a color difference signal from a down-sampled luminance signal. The down-sampler with sampling position shifter 107 shifts a sampling position of the down-sampled luminance signal in accordance with a scan to be processed. A video decoding device includes a down-sampler with sampling position shifter 205 configured to down-sample a luminance signal, and a predictor 203 configured to linearly predict a color difference signal from a down-sampled luminance signal. The down-sampler with sampling position shifter 205 shifts a sampling position in the down-sampled luminance signal in accordance with a scan to be processed.
    Type: Application
    Filed: October 25, 2012
    Publication date: October 16, 2014
    Applicant: NEC Corporation
    Inventors: Keiichi Chono, Hirofumi Aoki
  • Publication number: 20140307779
    Abstract: A video encoding device includes: a transformer for transforming an image block; an entropy encoder for entropy-encoding transformed data of the image block transformed by the transformer; a PCM encoder for PCM-encoding an image block; a multiplexed data selector for selecting output data of the entropy encoder or output data of the PCM encoder, for each block of an externally set block size; and a multiplexer for embedding a PCM header into a bitstream, in a block of the externally set block size, wherein the number of successive PCM-encoded blocks is embedded into the PCM header, and PCM data for the number of successive PCM-encoded blocks is multiplexed into the bitstream.
    Type: Application
    Filed: October 25, 2012
    Publication date: October 16, 2014
    Inventors: Keiichi Chono, Hirofumi Aoki, Yuzo Senda
  • Publication number: 20140286398
    Abstract: An image quantization parameter encoder includes: a prediction unit 11 for generating a predicted quantization parameter from a past reconstructed quantization parameter; a computing unit 12 for generating a delta quantization parameter from a quantization parameter and the predicted quantization parameter; and a quantization parameter encoding unit 13 for binary arithmetic encoding a first bin indicating whether or not the delta quantization parameter is significant, one or more other bins indicating an absolute value of the delta quantization parameter and made non-redundant, and a bin indicating whether the delta quantization parameter is positive or negative, in the case where the delta quantization parameter is significant.
    Type: Application
    Filed: June 14, 2012
    Publication date: September 25, 2014
    Inventors: Keiichi Chono, Hirofumi Aoki
  • Patent number: 8725403
    Abstract: A perceived relative distance that shows a relative distance between a host vehicle and a perception object perceived by a driver of the host vehicle is calculated on the basis of an actual relative distance therebetween. A perceived relative velocity that shows a relative velocity between the host vehicle and the perception object perceived by the driver is calculated on the basis of an actual relative velocity therebetween. A perceived relative ratio that is a ratio between the perceived relative distance and the perceived relative velocity is calculated. If the perceived relative ratio exceeds a threshold value, a vehicle control is performed.
    Type: Grant
    Filed: May 26, 2010
    Date of Patent: May 13, 2014
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Hirofumi Aoki, Hiroshi Yasuda
  • Publication number: 20140105282
    Abstract: A video quantization parameter encoder includes: a prediction unit 11 for generating a predicted quantization parameter from a past reconstructed quantization parameter; a computing unit 12 for generating a delta quantization parameter from a quantization parameter and the predicted quantization parameter; and quantization parameter encoding means 13 for binary arithmetic encoding a first bin indicating whether or not the delta quantization parameter is significant, a second bin indicating whether the delta quantization parameter is positive or negative, and other bins indicating an absolute value of the delta quantization parameter, in the case where the delta quantization parameter is significant.
    Type: Application
    Filed: June 27, 2012
    Publication date: April 17, 2014
    Inventors: Keiichi Chono, Hirofumi Aoki, Yuzo Senda
  • Publication number: 20140091916
    Abstract: A driver condition determination device determines whether a driver of a host vehicle has degraded consciousness. A main component for distribution of an accelerating operation condition with respect to proximity when tailgating a preceding vehicle is analyzed (S16), all data is origin-shifted (S18), and the accelerating operation condition of the driver when the driver has consciousness is created as a normal traveling model (S20). The likelihood of the accelerating operation condition, a likelihood average, a likelihood variance, and a likelihood threshold value are calculated (S22 to S26), and it is determined whether the likelihood of a current driving operation is lower than the likelihood threshold value (S28). When the likelihood is lower than the likelihood threshold value, the driver is determined as being in degraded consciousness.
    Type: Application
    Filed: April 23, 2012
    Publication date: April 3, 2014
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Hirofumi Aoki, Kiyoto Hanita
  • Publication number: 20140056349
    Abstract: A video encoding device includes: a quantization step size encoding unit 11 for encoding a quantization step size for controlling quantization granularity; and a quantization step size downsampling unit 12 for downsampling one or more encoded quantization step sizes to generate a quantization step size representative value. The quantization step size encoding unit 11 predicts the quantization step size using the quantization step size representative value.
    Type: Application
    Filed: June 8, 2012
    Publication date: February 27, 2014
    Applicant: NEC Corporation
    Inventors: Hirofumi Aoki, Keiichi Chono, Yuzo Senda
  • Publication number: 20130336397
    Abstract: A video encoding device for encoding video using inter prediction includes encoding control means 11 for controlling an inter-PU partition type of a CU to be encoded, based on a minimum inter-PU size (PA) and a CU size (PB) of the CU to be encoded. A video decoding device includes decoding control means for controlling an inter-PU partition of a CU to be decoded, based on the minimum inter-PU size (PA) and the size (PB) of the CU to be decoded.
    Type: Application
    Filed: January 5, 2012
    Publication date: December 19, 2013
    Applicant: NEC CORPORATION
    Inventors: Kenta Senzaki, Yuzo Senda, Keiichi Chono, Hirofumi Aoki