Patents by Inventor Choong Seng Boon

Choong Seng Boon 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).

  • Patent number: 10484700
    Abstract: A predictive coding system performs predictive encoding by determination of an optimum prediction mode from prediction methods for a pixel signal of a target block. A predicted signal is generated according to the determined mode, and a residual signal is determined. The residual signal and the optimum prediction mode are encoded to generate a compressed signal, which is decoded. The decoded signal is stored as a reconstructed picture sample. During encoding, a candidate prediction mode list is generated that contains elements of optimum prediction modes of previously-reproduced blocks neighboring the target block. A flag indicating whether the list contains an element corresponding to the optimum prediction mode is encoded, and an index to the corresponding element is encoded if the corresponding element is included in the list. The optimum prediction mode can be encoded based on identifying the elements in the list, unless no corresponding element appears on the list.
    Type: Grant
    Filed: September 26, 2018
    Date of Patent: November 19, 2019
    Assignee: NTT DOCOMO, INC.
    Inventors: Choong Seng Boon, Junya Takiue, Thiow Keng Tan
  • Patent number: 10484681
    Abstract: The image predictive encoding device 10 comprises an intra frame predictive signal generation method determination section 15 which determines, for adjacent areas comprising regenerated pixel signals and adjacent to the target area, a predictive method which is derived on the basis of data corresponding to the adjacent areas as an R mode predictive method or an L mode predictive method, an intra frame predictive signal generation section 16 which generates an intra frame predictive signal on the basis of the R mode predictive method thus determined, and a subtractor 18, a transform section 19, a quantization section 20, and an entropy encoding section 25 which encode a residual signal of a pixel signal of the target area on the basis of the generated intra frame predictive signal.
    Type: Grant
    Filed: November 12, 2018
    Date of Patent: November 19, 2019
    Assignee: NTT DOCOMO, INC.
    Inventors: Choong Seng Boon, Thiow Keng Tan
  • Patent number: 10484699
    Abstract: A predictive coding system performs predictive encoding by determination of an optimum prediction mode from prediction methods for a pixel signal of a target block. A predicted signal is generated according to the determined mode, and a residual signal is determined. The residual signal and the optimum prediction mode are encoded to generate a compressed signal, which is decoded. The decoded signal is stored as a reconstructed picture sample. During encoding, a candidate prediction mode list is generated that contains elements of optimum prediction modes of previously-reproduced blocks neighboring the target block. A flag indicating whether the list contains an element corresponding to the optimum prediction mode is encoded, and an index to the corresponding element is encoded if the corresponding element is included in the list. The optimum prediction mode can be encoded based on identifying the elements in the list, unless no corresponding element appears on the list.
    Type: Grant
    Filed: July 31, 2018
    Date of Patent: November 19, 2019
    Assignee: NTT DOCOMO, INC.
    Inventors: Choong Seng Boon, Junya Takiue, Thiow Keng Tan
  • Patent number: 10484705
    Abstract: A predicted signal generation unit provided in a video predictive encoding device estimates a zero-th motion vector for derivation of a zero-th predicted signal, selects a zero-th motion vector predictor similar to the zero-th motion vector, and generates zero-th side information containing a zero-th motion vector predictor index to identify the motion vector predictor and a motion vector difference determined from the zero-th motion vector and the zero-th motion vector predictor. The video predictive encoding device selects a motion vector for generation of a first predicted signal having a high correlation with a target region, generates first side information containing a first motion vector predictor index to identify the motion vector as a first motion vector predictor, sets the first motion vector predictor to a first motion vector, and combines the zero-th and first predicted signals to generate a predicted signal of the target region.
    Type: Grant
    Filed: September 14, 2018
    Date of Patent: November 19, 2019
    Assignee: NTT DOCOMO, INC.
    Inventors: Yoshinori Suzuki, Choong Seng Boon
  • Patent number: 10477228
    Abstract: A video predictive encoding device can include an input device to implement input of pictures constituting a video sequence; an encoder to encode the pictures by intra-prediction or inter-prediction and to encode output order information of each picture and information about a picture type of each picture to generate compressed picture data. The compressed picture data includes a picture to serve as a random access point. The video predictive coding device can also include a reconstruction unit to decode the compressed picture data to reconstruct pictures; a picture storage unit to store one or more of the reconstructed pictures as reference pictures to be used for encoding of a subsequent picture; and a controller to determine the picture type and control the picture storage unit based on the determined picture type. The controller can label each picture as one of following three types: CRA picture, type-1 picture and type-2 picture.
    Type: Grant
    Filed: August 20, 2018
    Date of Patent: November 12, 2019
    Assignee: NTT DOCOMO, INC.
    Inventors: Choong Seng Boon, Junya Takiue, Akira Fujibayashi, Thiow Keng Tan
  • Patent number: 10477242
    Abstract: A decoding device includes a decoder that decodes information of a direction of intra-picture prediction of a target block and compression data of a residual signal, a prediction signal generator that generates an intra-picture prediction signal using the information of the direction and an previously reconstructed reference sample of an adjacent block, a residual signal restorator that restores a reconstructed residual signal of the target block, and a block storage that restores and stores a pixel signal of the target block. The prediction signal generator derives reference samples from a previously reconstructed block neighbouring the target block stored, selects two or more key reference samples, performs an interpolation process between the key reference samples for generating interpolated reference samples, and generates the intra-picture prediction signal by extrapolating the interpolated reference samples based on the direction of the intra-picture prediction.
    Type: Grant
    Filed: October 4, 2018
    Date of Patent: November 12, 2019
    Assignee: NTT DOCOMO, INC.
    Inventors: Yoshinori Suzuki, Choong Seng Boon, Thiow Keng Tan
  • Patent number: 10477241
    Abstract: A decoding device includes a decoder that decodes information of a direction of intra-picture prediction of a target block and compression data of a residual signal, a prediction signal generator that generates an intra-picture prediction signal using the information of the direction and an previously reconstructed reference sample of an adjacent block, a residual signal restorator that restores a reconstructed residual signal of the target block, and a block storage that restores and stores a pixel signal of the target block. The prediction signal generator derives reference samples from a previously reconstructed block neighbouring the target block stored, selects two or more key reference samples, performs an interpolation process between the key reference samples for generating interpolated reference samples, and generates the intra-picture prediction signal by extrapolating the interpolated reference samples based on the direction of the intra-picture prediction.
    Type: Grant
    Filed: October 4, 2018
    Date of Patent: November 12, 2019
    Assignee: NTT DOCOMO, INC.
    Inventors: Yoshinori Suzuki, Choong Seng Boon, Thiow Keng Tan
  • Publication number: 20190342571
    Abstract: In image predictive encoding according to an embodiment, one or more motion information sets are derived from plural pieces of motion information stored in a computer readable storage medium. Each of the one or more information sets includes two pieces of motion information between which any one of constituent elements differ in value. A predicted signal of a target region in a picture is generated by motion compensation, using two pieces of motion information in a motion information set selected from the one or more motion information sets. The two pieces of motion information in the selected motion information set are stored in the computer readable storage medium, and are used for generation of a predicted signal of another region.
    Type: Application
    Filed: July 8, 2019
    Publication date: November 7, 2019
    Inventors: Yoshinori SUZUKI, Choong Seng BOON, Thiow Keng TAN
  • Publication number: 20190335194
    Abstract: In image predictive encoding according to an embodiment, one or more motion information sets are derived from plural pieces of motion information stored in a computer readable storage medium. Each of the one or more information sets includes two pieces of motion information between which any one of constituent elements differ in value. A predicted signal of a target region in a picture is generated by motion compensation, using two pieces of motion information in a motion information set selected from the one or more motion information sets. The two pieces of motion information in the selected motion information set are stored in the computer readable storage medium, and are used for generation of a predicted signal of another region.
    Type: Application
    Filed: July 8, 2019
    Publication date: October 31, 2019
    Inventors: Yoshinori SUZUKI, Choong Seng BOON, Thiow Keng TAN
  • Publication number: 20190335193
    Abstract: In image predictive encoding according to an embodiment, one or more motion information sets are derived from plural pieces of motion information stored in a computer readable storage medium. Each of the one or more information sets includes two pieces of motion information between which any one of constituent elements differ in value. A predicted signal of a target region in a picture is generated by motion compensation, using two pieces of motion information in a motion information set selected from the one or more motion information sets. The two pieces of motion information in the selected motion information set are stored in the computer readable storage medium, and are used for generation of a predicted signal of another region.
    Type: Application
    Filed: July 8, 2019
    Publication date: October 31, 2019
    Inventors: Yoshinori SUZUKI, Choong Seng BOON, Thiow Keng TAN
  • Publication number: 20190335195
    Abstract: In image predictive encoding according to an embodiment, one or more motion information sets are derived from plural pieces of motion information stored in a computer readable storage medium. Each of the one or more information sets includes two pieces of motion information between which any one of constituent elements differ in value. A predicted signal of a target region in a picture is generated by motion compensation, using two pieces of motion information in a motion information set selected from the one or more motion information sets. The two pieces of motion information in the selected motion information set are stored in the computer readable storage medium, and are used for generation of a predicted signal of another region.
    Type: Application
    Filed: July 8, 2019
    Publication date: October 31, 2019
    Inventors: Yoshinori SUZUKI, Choong Seng BOON, Thiow Keng TAN
  • Publication number: 20190327488
    Abstract: A moving image encoding/decoding system may include a video predictive encoding device, which may include: an encoding device which encodes each of a plurality of input pictures to generate compressed picture data including a random access picture, and encodes data about display order information of each picture; a restoration device which decodes the compressed picture data to restore a reproduced picture; a picture storage device which stores the reproduced picture as a reference picture; and a memory management device which controls the picture storage device. Following completion of an encoding process of generating the random access picture, the memory management device refreshes the picture storage device by setting every reference picture in the picture storage device, except for the random access picture, as unnecessary immediately before or immediately after encoding a picture with display order information larger than the display order information of the random access picture.
    Type: Application
    Filed: June 28, 2019
    Publication date: October 24, 2019
    Applicant: NTT DOCOMO, INC.
    Inventors: Choong Seng Boon, Yoshinori Suzuki, Akira Fujibayashi, Thiow Keng Tan
  • Patent number: 10440383
    Abstract: In image predictive encoding according to an embodiment, one or more motion information sets are derived from plural pieces of motion information stored in a computer readable storage medium. Each of the one or more information sets includes two pieces of motion information between which any one of constituent elements differ in value. A predicted signal of a target region in a picture is generated by motion compensation, using two pieces of motion information in a motion information set selected from the one or more motion information sets. The two pieces of motion information in the selected motion information set are stored in the computer readable storage medium, and are used for generation of a predicted signal of another region.
    Type: Grant
    Filed: January 18, 2017
    Date of Patent: October 8, 2019
    Assignee: NTT DOCOMO, INC.
    Inventors: Yoshinori Suzuki, Choong Seng Boon, Thiow Keng Tan
  • Patent number: 10397597
    Abstract: A predictive coding system performs predictive encoding by determination of an optimum prediction mode from prediction methods for a pixel signal of a target block. A predicted signal is generated according to the determined mode, and a residual signal is determined. The residual signal and the optimum prediction mode are encoded to generate a compressed signal, which is decoded. The decoded signal is stored as a reconstructed picture sample. During encoding, a candidate prediction mode list is generated that contains elements of optimum prediction modes of previously-reproduced blocks neighboring the target block. A flag indicating whether the list contains an element corresponding to the optimum prediction mode is encoded, and an index to the corresponding element is encoded if the corresponding element is included in the list. The optimum prediction mode can be encoded based on identifying the elements in the list, unless no corresponding element appears on the list.
    Type: Grant
    Filed: January 13, 2017
    Date of Patent: August 27, 2019
    Assignee: NTT DOCOMO, INC.
    Inventors: Choong Seng Boon, Junya Takiue, Thiow Keng Tan
  • Patent number: 10390042
    Abstract: A moving image encoding/decoding system may include a video predictive encoding device, which may include: an encoding device which encodes each of a plurality of input pictures to generate compressed picture data including a random access picture, and encodes data about display order information of each picture; a restoration device which decodes the compressed picture data to restore a reproduced picture; a picture storage device which stores the reproduced picture as a reference picture; and a memory management device which controls the picture storage device. Following completion of an encoding process of generating the random access picture, the memory management device refreshes the picture storage device by setting every reference picture in the picture storage device, except for the random access picture, as unnecessary immediately before or immediately after encoding a picture with display order information larger than the display order information of the random access picture.
    Type: Grant
    Filed: December 7, 2018
    Date of Patent: August 20, 2019
    Assignee: NTT DOCOMO, INC.
    Inventors: Choong Seng Boon, Yoshinori Suzuki, Akira Fujibayashi, Thiow Keng Tan
  • Patent number: 10382783
    Abstract: A decoding device includes a decoder that decodes information of a direction of intra-picture prediction of a target block and compression data of a residual signal, a prediction signal generator that generates an intra-picture prediction signal using the information of the direction and an previously reconstructed reference sample of an adjacent block, a residual signal restorator that restores a reconstructed residual signal of the target block, and a block storage that restores and stores a pixel signal of the target block. The prediction signal generator derives reference samples from a previously reconstructed block neighbouring the target block stored, selects two or more key reference samples, performs an interpolation process between the key reference samples for generating interpolated reference samples, and generates the intra-picture prediction signal by extrapolating the interpolated reference samples based on the direction of the intra-picture prediction.
    Type: Grant
    Filed: October 4, 2018
    Date of Patent: August 13, 2019
    Assignee: NTT DOCOMO, INC.
    Inventors: Yoshinori Suzuki, Choong Seng Boon, Thiow Keng Tan
  • Publication number: 20190238885
    Abstract: A moving image encoding/decoding system may include a video predictive encoding device, which may include: an encoding device which encodes each of a plurality of input pictures to generate compressed picture data including a random access picture, and encodes data about display order information of each picture; a restoration device which decodes the compressed picture data to restore a reproduced picture; a picture storage device which stores the reproduced picture as a reference picture; and a memory management device which controls the picture storage device. Following completion of an encoding process of generating the random access picture, the memory management device refreshes the picture storage device by setting every reference picture in the picture storage device, except for the random access picture, as unnecessary immediately before or immediately after encoding a picture with display order information larger than the display order information of the random access picture.
    Type: Application
    Filed: April 5, 2019
    Publication date: August 1, 2019
    Applicant: NTT DOCOMO, INC.
    Inventors: Choong Seng Boon, Yoshinori Suzuki, Akira Fujibayashi, Thiow Keng Tan
  • Publication number: 20190215526
    Abstract: A video predictive encoding device includes an input module to receive pictures forming a video sequence, and an encoding module to encode the pictures by either intra prediction or inter prediction to generate compressed picture data, and to packetize the compressed image data along with packet header information. The packet header information includes a picture type. The encoding module determines the picture type so as to uniquely indicate whether encoded picture data is used for reference in decoding of another picture.
    Type: Application
    Filed: March 13, 2019
    Publication date: July 11, 2019
    Inventors: JUNYA TAKIUE, Choong Seng Boon, Thiow Keng Tan
  • Publication number: 20190215525
    Abstract: A video predictive encoding device includes an input module to receive pictures forming a video sequence, and an encoding module to encode the pictures by either intra prediction or inter prediction to generate compressed picture data, and to packetize the compressed image data along with packet header information. The packet header information includes a picture type. The encoding module determines the picture type so as to uniquely indicate whether encoded picture data is used for reference in decoding of another picture.
    Type: Application
    Filed: March 13, 2019
    Publication date: July 11, 2019
    Inventors: Junya Takiue, Choong Seng Boon, Thiow Keng Tan
  • Publication number: 20190215527
    Abstract: A video predictive encoding device includes an input module to receive pictures forming a video sequence, and an encoding module to encode the pictures by either intra prediction or inter prediction to generate compressed picture data, and to packetize the compressed image data along with packet header information. The packet header information includes a picture type. The encoding module determines the picture type so as to uniquely indicate whether encoded picture data is used for reference in decoding of another picture.
    Type: Application
    Filed: March 13, 2019
    Publication date: July 11, 2019
    Inventors: Junya Takiue, Choong Seng Boon, Thiow Keng Tan