Patents Assigned to SUN PATENT TRUST
  • Image decoding method
    Patent number: 11647220
    Abstract: An image decoding method includes: dividing a current block into sub-blocks; deriving, for each sub-block, one or more prediction information candidates; obtaining an index; and decoding the current block using the prediction information candidate selected by the index.
    Type: Grant
    Filed: July 20, 2022
    Date of Patent: May 9, 2023
    Assignee: SUN PATENT TRUST
    Inventors: Toshiyasu Sugio, Takahiro Nishi, Youji Shibahara, Kyoko Tanikawa, Hisao Sasai, Toru Matsunobu, Kengo Terada
  • Picture coding method, picture coding apparatus, picture decoding method, and picture decoding apparatus
    Patent number: 11647208
    Abstract: A picture coding method includes: performing a first derivation process for deriving a first merging candidate which includes a candidate set of a prediction direction, a motion vector, and a reference picture index for use in coding of a current block; performing a second derivation process for deriving a second merging candidate; selecting a merging candidate to be used in the coding of the current block from among the first and second merging candidates; and attaching an index for identifying the selected merging candidate to the bitstream; wherein the first derivation process is performed so that a total number of the first merging candidates does not exceed a predetermined number, and the second derivation process is performed when the total number of the first merging candidates is less than a predetermined maximum number of merging candidates.
    Type: Grant
    Filed: December 1, 2021
    Date of Patent: May 9, 2023
    Assignee: SUN PATENT TRUST
    Inventors: Toshiyasu Sugio, Takahiro Nishi, Youji Shibahara, Kyoko Tanikawa, Hisao Sasai, Toru Matsunobu, Kengo Terada
  • Video coding method, video decoding method, video coding apparatus and video decoding apparatus
    Patent number: 11647218
    Abstract: A moving picture coding method includes: making a determination as to whether or not to code all blocks in a current picture in the skip mode; setting, based on a result of the determination, a first flag indicating whether or not a temporally neighboring block is to be referenced, a value of a parameter for determining a total number of merging candidates, and a second flag for each block included in the current picture, the second flag indicating whether or not the block is to be coded in the skip mode; calculating, as a merging candidate, a neighboring block usable for merging; and coding an index which indicates a merging candidate to be used for coding of the current block and attaching the coded index to a bitstream.
    Type: Grant
    Filed: January 19, 2021
    Date of Patent: May 9, 2023
    Assignee: SUN PATENT TRUST
    Inventors: Toshiyasu Sugio, Takahiro Nishi, Youji Shibahara, Kyoko Tanikawa, Hisao Sasai, Toru Matsunobu, Kengo Terada
  • Mobile station and reception method
    Patent number: 11646842
    Abstract: Provided is a radio communication device which can separate propagation paths of antenna ports and improve a channel estimation accuracy even when using virtual antennas. The device includes: a mapping unit which maps a data signal after modulation to a virtual antenna and a virtual antenna; a phase inversion unit which inverts the phase of S0 transmitted from an antenna port in synchronization with a phase inversion unit between the odd-number slot and the even-number slot; the phase inversion unit which inverts the phase of R0 transmitted from the antenna port; a phase inversion unit which inverts the phase of S1 transmitted from an antenna port in synchronization with a phase inversion unit; and the phase inversion unit which inverts the phase of R1 transmitted from an antenna port.
    Type: Grant
    Filed: March 5, 2021
    Date of Patent: May 9, 2023
    Assignee: Sun Patent Trust
    Inventors: Seigo Nakao, Masayuki Hoshino, Atsushi Sumasu, Katsuhiko Hiramatsu
  • Image coding method, image decoding method, image coding apparatus, receiving apparatus, and transmitting apparatus
    Patent number: 11647211
    Abstract: An image coding method of hierarchically coding a plurality of pictures to generate a bitstream, includes: coding each of the plurality of pictures, which belongs to any one of a plurality of hierarchical layers, with reference to a picture belonging to a hierarchical layer which is same as or lower than a hierarchical layer to which the picture belongs, and without reference to a picture belonging to a hierarchical layer which is higher than the hierarchical layer to which the picture belongs; and generating the bitstream by coding the coded pictures and time information indicating decoding times of the coded pictures. The time information indicates that the decoding times are set at equal intervals for low-layer pictures which are the plurality of pictures other than highest-layer pictures belonging to a highest layer among the plurality of hierarchical layers.
    Type: Grant
    Filed: April 15, 2016
    Date of Patent: May 9, 2023
    Assignee: SUN PATENT TRUST
    Inventors: Kengo Terada, Takahiro Nishi, Hisao Sasai
  • IMAGE CODING METHOD, IMAGE CODING APPARATUS, IMAGE DECODING METHOD, IMAGE DECODING APPARATUS, AND IMAGE CODING AND DECODING APPARATUS
    Publication number: 20230128151
    Abstract: A method for transmitting a bitstream via a network is provided. The bitstream is for coding a current block and is generated by: deriving a first candidate from a first motion vector that has been used to code a first block; coding a first index identifying a reference picture to be used for coding the current block; deriving a second candidate having a second motion vector that includes a non-zero value, which is assigned to the reference picture; and coding a second index identifying a selected candidate to be used for coding the current block. The second motion vector is not derived by coding a block adjacent to the current block, and the non-zero value is assigned by offset values which include an OffsetX and an OffsetY and which are located in a picture header.
    Type: Application
    Filed: December 21, 2022
    Publication date: April 27, 2023
    Applicant: Sun Patent Trust
    Inventors: Toshiyasu SUGIO, Takahiro NISHI, Youji SHIBAHARA, Kyoko TANIKAWA, Hisao SASAI, Toru MATSUNOBU
  • CODING METHOD AND APPARATUS WITH CANDIDATE MOTION VECTORS
    Publication number: 20230130122
    Abstract: A transmitting method for transmitting a bitstream to a terminal is provided. The bit stream is generated by coding a current block of a picture and has an index for identifying a motion vector candidate from a motion vector candidate list. The motion vector candidate list is generated and includes motion vector candidates and a value for each motion vector candidate. A second candidate is arranged before a first candidate in the motion vector candidate list. The first candidate is sorted before the second candidate in the motion vector candidate list based on the values of the first and second candidates. The value of the first candidate is higher than the value of the second candidate. For each motion vector candidate, the value is based on a number of times the motion vector candidate is selected as a motion vector predictor for neighboring blocks.
    Type: Application
    Filed: December 22, 2022
    Publication date: April 27, 2023
    Applicant: Sun Patent Trust
    Inventors: Toshiyasu SUGIO, Takahiro NISHI, Youji SHIBAHARA, Kyoko TANIKAWA, Hisao SASAI, Toru MATSUNOBU
  • Communication apparatus and retransmission control method
    Patent number: 11637660
    Abstract: Provided is a terminal device that is capable of improving the characteristics of a response signal having poor transmission characteristics when ARQ is utilized in communication using an uplink unit band and a plurality of downlink unit bands associated with the uplink unit band. At the time of channel selection, a control unit selects a resource used in sending a response signal from among specific PUCCH resources notified in advance from a base station and PUCCH resources mapped to a CCE, and controls the transmission of the response signal. A response signal generating unit supports implicit signaling with respect to any given response signal, and at the same time as supporting LTE fallback from 2CC, uses a mapping method that, between bits, smooths the number of PUCCH resources that can determine ACK/NACK simply by determining the PUCCH resource regarding which the response signal had notified.
    Type: Grant
    Filed: January 27, 2021
    Date of Patent: April 25, 2023
    Assignee: Sun Patent Trust
    Inventors: Toru Oizumi, Seigo Nakao
  • Transmission device, transmission method, reception device, reception method, integrated circuit, and program
    Patent number: 11632192
    Abstract: A transmission device that performs multiple-input multiple-output (MIMO) transmission of transmit data using a plurality of fundamental bands. The transmission device includes an error correction coding unit, a mapping unit, and a MIMO coding unit. The error correction coding unit, for each data block of predefined length, performs error correction coding and thereby generates an error correction coded frame. The mapping unit maps each predefined number of bits in the error correction coded frame to a corresponding symbol and thereby generates an error correction coded block. The MIMO coding unit performs MIMO coding with respect to the error correction coded block. Components of data included in the error correction coded block are allocated to at least two of the fundamental bands and transmitted.
    Type: Grant
    Filed: June 21, 2021
    Date of Patent: April 18, 2023
    Assignee: SUN PATENT TRUST
    Inventors: Mikihiro Ouchi, Noritaka Iguchi, Tomohiro Kimura
  • Image coding method, image decoding method, image coding apparatus, image decoding apparatus, and image coding and decoding apparatus
    Patent number: 11632572
    Abstract: A dependency indication is signaled within the beginning of a packet, that is, within the adjacent of a slice header to be parsed or a parameter set. This is achieved, for example, by including the dependency indication at the beginning of the slice header, preferably after a syntax element identifying the parameter set and before the slice address, by including the dependency indication before the slice address, by providing the dependency indication to a NALU header using a separate message, or by using a special NALU type for NALUs carrying dependent slices.
    Type: Grant
    Filed: February 24, 2020
    Date of Patent: April 18, 2023
    Assignee: SUN PATENT TRUST
    Inventors: Semih Esenlik, Matthias Narroschke, Thomas Wedi
  • Base station apparatus, terminal apparatus, transmitting method, and receiving method
    Patent number: 11632213
    Abstract: Disclosed is a base station apparatus which allows an idle mode UE, in a small cell using S-NCT, to recognize the small cell and to receive a DCI. The base station apparatus is configured to use a carrier configuration which has no region for mapping a PDCCH and in which an EPDCCH is mapped in a data region. The base station apparatus includes: master information generating section 101 configured to generate allocation information indicating a resource which forms a search space in the EPDCCH and being scrambled with a cell ID of the base station apparatus; and transmitting section 107 configured to transmit the allocation information, a detection signal indicating the cell ID, and a control signal assigned in the search space.
    Type: Grant
    Filed: November 23, 2021
    Date of Patent: April 18, 2023
    Assignee: Sun Patent Trust
    Inventors: Lilei Wang, Ayako Horiuchi, Hidetoshi Suzuki
  • VIDEO ENCODING METHOD, VIDEO ENCODING APPARATUS, VIDEO DECODING METHOD, VIDEO DECODING APPARATUS, AND VIDEO ENCODING/DECODING APPARATUS
    Publication number: 20230105128
    Abstract: Various embodiments for transmitting a bitstream via a network are provided. The bitstream includes an index identifying a motion vector from a candidate list. The candidate list is generated by: adding, when a motion vector used for coding a first block spatially adjacent to the current block is useable for coding the current block, one or more first candidates to the candidate list; adding a second candidate to the candidate list, with the second candidate being derived based on a motion vector used for coding a second block within a first collocated picture; and adding a third candidate to the candidate list until a number of the plurality of candidates in the candidate list reaches a maximum number, with the third candidate being derived based on a motion vector used for coding a third block within a second collocated picture.
    Type: Application
    Filed: December 8, 2022
    Publication date: April 6, 2023
    Applicant: Sun Patent Trust
    Inventors: Toshiyasu SUGIO, Takahiro NISHI, Youji SHIBAHARA, Kyoko TANIKAWA, Hisao SASAI, Toru MATSUNOBU
  • OFDM transmitter device having a symbol generator for generating non-zero control symbols, and OFDM transmission method including generating non-zero control symbols
    Patent number: 11621879
    Abstract: An OFDM transmitter and an OFDM receiver respectively transmit and receive N (N?2, N is an integer) control symbols. For each control symbol, a guard interval time-domain signal is, for example, identical to a signal obtained by frequency-shifting at least a portion of a useful symbol time-domain signal by an amount different from any other symbol, or to a signal obtained by frequency-shifting one or both of a portion and a span of a useful symbol interval time-domain signal different from any other symbol by a predetermined amount.
    Type: Grant
    Filed: February 10, 2022
    Date of Patent: April 4, 2023
    Assignee: SUN PATENT TRUST
    Inventors: Yoshinobu Matsumura, Tomohiro Kimura, Mikihiro Ouchi
  • Transmission device, transmission method, receiving device and receiving method
    Patent number: 11621763
    Abstract: Provided is control information related to polarizations of antennas for MISO communication. The control signal generator generates polarization information indicating whether antennas used for transmission by MISO have only a first polarization or have a second polarization as well as the first polarization. With this structure, the present invention allows for the use of combinations of SISO, MISO and MIMO, taking the polarization of antennas. Furthermore, the present invention enables the receiver to reduce the power consumption.
    Type: Grant
    Filed: March 15, 2021
    Date of Patent: April 4, 2023
    Assignee: SUN PATENT TRUST
    Inventors: Mikihiro Ouchi, Yutaka Murakami, Tomohiro Kimura
  • Image coding method, image decoding method, image coding apparatus, and image decoding apparatus
    Patent number: 11622128
    Abstract: An image coding method includes: deriving a candidate for a motion vector of a current block from a co-located motion vector; adding the candidate to a list; selecting the motion vector of the current block from the list; and coding the current block, wherein the deriving includes: deriving the candidate by a first derivation scheme in the case of determining that each of a current reference picture and a co-located reference picture is a long-term reference picture; and deriving the candidate by a second derivation scheme in the case of determining that each of the current reference picture and the co-located reference picture is a short-term reference picture.
    Type: Grant
    Filed: July 30, 2021
    Date of Patent: April 4, 2023
    Assignee: SUN PATENT TRUST
    Inventors: Viktor Wahadaniah, Chong Soon Lim, Sue Mon Thet Naing, Hai Wei Sun, Takahiro Nishi, Hisao Sasai, Youji Shibahara, Kyoko Tanikawa, Toshiyasu Sugio, Kengo Terada, Toru Matsunobu
  • Terminal apparatus and method for transmitting a reference signal
    Patent number: 11616535
    Abstract: Provided are a radio communication terminal apparatus and a radio transmission method by which intersymbol interference of DM-RS of a CoMP terminal and a Non-CoMP terminal can be reduced. A CoMP set setting unit (102) sets the cell IDs of all cells in the CoMP set in a cell selection unit (104), and a serving cell setting unit (103) sets the cell ID of the serving cell in the cell selection unit (104). The cell selection unit (104) selects the cell ID having a number closest to the cell ID of the serving cell from the cells in the CoMP set. A sequence information calculation unit (106) derives a sequence group number from the selected cell ID, and the sequence information calculation unit (106) calculates a sequence number from the derived sequence group number and a transmission bandwidth of the DM-RS.
    Type: Grant
    Filed: November 21, 2019
    Date of Patent: March 28, 2023
    Assignee: SUN PATENT TRUST
    Inventors: Takashi Iwai, Akihiko Nishio, Yoshihiko Ogawa, Seigo Nakao, Masayuki Hoshino
  • Mapping of control information to control channel elements
    Patent number: 11611956
    Abstract: The invention relates to a new structure of a control channel region within a sub-frame of a 3GPP-based based communication system using OFDM in the downlink. This new structure of a control channel region is inter alia particularly suitable for conveying physical downlink control channel information from a donor eNodeB to a relay node. The control channel region is divided in CCEs that have equal size irrespective of the presence of further cell-specific and/or UE-specific reference signals within the control channel region. This is achieved by dividing the control channel region in plural sub-CCEs that are combined to CCEs all having equal size (in terms of resource elements that can be used for the signaling of control information). The control channel region is divided in the frequency domain and/or time domain in a FDM respectively TDM fashion in order to obtain the sub-CCEs.
    Type: Grant
    Filed: January 5, 2021
    Date of Patent: March 21, 2023
    Assignee: SUN PATENT TRUST
    Inventors: Sujuan Feng, Alexander Golitschek Edler Von Elbwart, Christian Wengerter
  • Terminal, base station, transmission method, and reception method
    Patent number: 11606785
    Abstract: A terminal includes: a receiver, which, in operation, receives downlink control information and downlink data; circuitry, which, in operation, determines, based on the downlink control information and an offset, a physical uplink control channel (PUCCH) resource used for transmission of a response signal for the downlink data; and a transmitter, which, in operation, transmits the response signal using the determined PUCCH resource. A first offset is used as the offset when the terminal is configured in a coverage enhancement mode, in which the response signal is allowed to be transmitted repeatedly for one of plural repetition levels in a plurality of subframes, where the first offset is configured for each of the plural repetition levels. The first offset is different from a second offset, which is used when the terminal is not configured in the coverage enhancement mode.
    Type: Grant
    Filed: November 23, 2021
    Date of Patent: March 14, 2023
    Assignee: Sun Patent Trust
    Inventors: Tetsuya Yamamoto, Chi Gao, Hidetoshi Suzuki, Seigo Nakao
  • Efficient discard mechanism in small cell deployment
    Patent number: 11601373
    Abstract: The invention relates to a method for efficiently discarding data packets destined to a mobile station connected to both a master base station and a secondary base station. The master base station configures a secondary discard function in a lower layer of the secondary base station, based on the master discard function in the higher layer of the master base station. The master base station forwards the data packet from the higher layer to the lower of the secondary base station. The secondary discard function of the lower layer at the secondary base station discards the received data packet upon expiry of the secondary timer started by the lower layer upon reception of the data packet from the higher layer at the master base station.
    Type: Grant
    Filed: May 21, 2021
    Date of Patent: March 7, 2023
    Assignee: Sun Patent Trust
    Inventors: Prateek Basu Mallick, Joachim Loehr
  • Moving picture coding apparatus, moving picture decoding apparatus, and stream data
    Patent number: RE49510
    Abstract: A signal separation unit (101) separates an input picture made up of component pictures of RGB, each of which has an equal number of pixels as the input picture, into three component pictures, and outputs the three component pictures. Each of coding units (102 to 104) codes one of the component pictures into an intra-picture prediction coded picture or an inter-picture prediction coded picture, and outputs a bit stream corresponding to the component picture. A bit stream multiplexing unit (105) multiplexes three bit streams outputted from the three coding units into one bit stream, and outputs the bit stream. Each of the coding units (102), (103) and (104) determines a prediction method for the component picture at the time of coding.
    Type: Grant
    Filed: November 22, 2017
    Date of Patent: April 25, 2023
    Assignee: SUN PATENT TRUST
    Inventors: Satoshi Kondo, Tadamasa Toma, Hiroshi Saito, Thomas Wedi, Steffen Wittmann