Patents by Inventor Paul James Silcock
Paul James Silcock 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).
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Mode-dependent coefficient scanning and directional transforms for different colour sampling formats
Patent number: 11770519Abstract: A method of coding 4:2:2 or 4:4:4 video data comprises predicting luminance and/or chrominance samples of an image from other respective reference samples derived from the same image according to a prediction mode associated with a sample to be predicted, the prediction mode being selected for each of a plurality of blocks of samples, from a set of two or more candidate prediction modes; detecting differences between the samples and the respective predicted samples; selecting a frequency-separation transform from two or more candidate frequency separation transforms according to the prediction mode associated with a current block of samples using a mapping between transform and prediction mode, the mapping between different, as between chrominance and luminance samples, for at least the 4:4:4 format; and encoding the detected differences by frequency-separating the differences, using the selected frequency-separation transform.Type: GrantFiled: January 20, 2022Date of Patent: September 26, 2023Assignee: SONY GROUP CORPORATIONInventors: James Alexander Gamei, Nicholas Ian Saunders, Karl James Sharman, Paul James Silcock -
MODE-DEPENDENT COEFFICIENT SCANNING AND DIRECTIONAL TRANSFORMS FOR DIFFERENT COLOUR SAMPLING FORMATS
Publication number: 20220150468Abstract: A method of coding 4:2:2 or 4:4:4 video data comprises predicting luminance and/or chrominance samples of an image from other respective reference samples derived from the same image according to a prediction mode associated with a sample to be predicted, the prediction mode being selected for each of a plurality of blocks of samples, from a set of two or more candidate prediction modes; detecting differences between the samples and the respective predicted samples; selecting a frequency-separation transform from two or more candidate frequency separation transforms according to the prediction mode associated with a current block of samples using a mapping between transform and prediction mode, the mapping between different, as between chrominance and luminance samples, for at least the 4:4:4 format; and encoding the detected differences by frequency-separating the differences, using the selected frequency-separation transform.Type: ApplicationFiled: January 20, 2022Publication date: May 12, 2022Applicant: SONY GROUP CORPORATIONInventors: James Alexander GAMEI, Nicholas Ian SAUNDERS, Karl James SHARMAN, Paul James SILCOCK -
Mode-dependent coefficient scanning and directional transforms for different colour sampling formats
Patent number: 11252402Abstract: A method of coding 4:2:2 or 4:4:4 video data comprises predicting luminance and/or chrominance samples of an image from other respective reference samples derived from the same image according to a prediction mode associated with a sample to be predicted, the prediction mode being selected for each of a plurality of blocks of samples, from a set of two or more candidate prediction modes; detecting differences between the samples and the respective predicted samples; selecting a frequency-separation transform from two or more candidate frequency separation transforms according to the prediction mode associated with a current block of samples using a mapping between transform and prediction mode, the mapping between different, as between chrominance and luminance samples, for at least the 4:4:4 format; and encoding the detected differences by frequency-separating the differences, using the selected frequency-separation transform.Type: GrantFiled: February 11, 2019Date of Patent: February 15, 2022Assignee: SONY CORPORATIONInventors: James Alexander Gamei, Nicholas Ian Saunders, Karl James Sharman, Paul James Silcock -
Patent number: 11109019Abstract: A video coding or decoding method using inter-image prediction to encode input video data in which each chrominance component has 1/Mth of the horizontal resolution and 1/Nth of the vertical resolution of the luminance component, where M and N are integers equal to 1 or more, including storing one or more images preceding a current image, interpolating a higher resolution version of prediction units of the stored images so that the luminance component has a horizontal resolution P times that of the corresponding portion of the stored image and a vertical resolution Q times that of the corresponding portion of the stored image, detecting inter-image motion between a current image and the one or more interpolated stored images so as to generate motion vectors between a prediction unit of the current image and areas of the one or more preceding images, and generating a motion compensated prediction.Type: GrantFiled: December 2, 2019Date of Patent: August 31, 2021Assignee: Sony CorporationInventors: James Alexander Gamei, Nicholas Ian Saunders, Karl James Sharman, Paul James Silcock
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Patent number: 10841572Abstract: A video coding or decoding method in which luminance and chrominance samples are predicted from other respective reference samples according to a prediction direction associated with a current sample to be predicted, the chrominance samples having a lower horizontal and/or vertical sampling rate than the luminance samples so that the ratio of luminance horizontal resolution to chrominance horizontal resolution is different than the ratio of luminance vertical resolution to chrominance vertical resolution, so that a block of luminance samples has a different aspect ratio to a corresponding block of chrominance samples, the method including: detecting a first prediction direction defined in relation to a first grid of a first aspect ratio in respect of a set of current samples to be predicted; and applying a direction mapping to the prediction direction to generate a second prediction direction defined in relation to a second grid of a different aspect ratio.Type: GrantFiled: December 23, 2019Date of Patent: November 17, 2020Assignee: SONY CORPORATIONInventors: James Alexander Gamei, Nicholas Ian Saunders, Karl James Sharman, Paul James Silcock
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Patent number: 10827169Abstract: A method of video coding in respect of a 4:2:2 chroma subsampling format includes dividing image data into transform units. In a case of a non-square transform unit, the method includes splitting the non-square transform unit into square blocks prior to applying a spatial frequency transform. The method further includes applying a spatial frequency transform to the square blocks to generate corresponding sets of spatial frequency coefficients.Type: GrantFiled: April 26, 2013Date of Patent: November 3, 2020Assignee: Sony CorporationInventors: James Alexander Gamei, Nicholas Ian Saunders, Karl James Sharman, Paul James Silcock
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Publication number: 20200213584Abstract: A video coding or decoding method in which luminance and chrominance samples are predicted from other respective reference samples according to a prediction direction associated with a current sample to be predicted, the chrominance samples having a lower horizontal and/or vertical sampling rate than the luminance samples so that the ratio of luminance horizontal resolution to chrominance horizontal resolution is different than the ratio of luminance vertical resolution to chrominance vertical resolution, so that a block of luminance samples has a different aspect ratio to a corresponding block of chrominance samples, the method including: detecting a first prediction direction defined in relation to a first grid of a first aspect ratio in respect of a set of current samples to be predicted; and applying a direction mapping to the prediction direction to generate a second prediction direction defined in relation to a second grid of a different aspect ratio.Type: ApplicationFiled: December 23, 2019Publication date: July 2, 2020Applicant: Sony CorporationInventors: James Alexander Gamei, Nicholas Ian Saunders, Karl James Sharman, Paul James Silcock
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Publication number: 20200177874Abstract: A video coding or decoding method using inter-image prediction to encode input video data in which each chrominance component has 1/Mth of the horizontal resolution and 1/Nth of the vertical resolution of the luminance component, where M and N are integers equal to 1 or more, including storing one or more images preceding a current image, interpolating a higher resolution version of prediction units of the stored images so that the luminance component has a horizontal resolution P times that of the corresponding portion of the stored image and a vertical resolution Q times that of the corresponding portion of the stored image, detecting inter-image motion between a current image and the one or more interpolated stored images so as to generate motion vectors between a prediction unit of the current image and areas of the one or more preceding images, and generating a motion compensated prediction.Type: ApplicationFiled: December 2, 2019Publication date: June 4, 2020Applicant: Sony CorporationInventors: James Alexander GAMEI, Nicholas Ian SAUNDERS, Karl James SHARMAN, Paul James SILCOCK
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Patent number: 10674144Abstract: A video coding or decoding method in which luminance and chrominance samples in a 4:4:4 format or a 4:2:2 format are predicted from other respective samples according to a prediction direction associated with blocks of samples to be predicted; comprises detecting a prediction direction in respect of a current block to be predicted; generating a predicted block of chrominance samples according to other chrominance samples defined by the prediction direction; if the detected prediction direction is substantially vertical, filtering the left column of samples in the predicted block of chrominance samples, or if the detected prediction direction is substantially horizontal, filtering the top row of samples in the predicted block of chrominance samples; and encoding a difference between the filtered predicted chrominance block and the actual chrominance block or applying a decoded difference to the filtered predicted chrominance block so as to encode or decode the block respectively.Type: GrantFiled: September 16, 2019Date of Patent: June 2, 2020Assignee: SONY CORPORATIONInventors: James Alexander Gamei, Nicholas Ian Saunders, Karl James Sharman, Paul James Silcock
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Patent number: 10616572Abstract: A video encoding method for encoding both the 4:2:0 video and 4:4:4 video formats. The method includes generating blocks of quantized spatial frequency data by quantizing coefficients and generating a matrix of data. The method further includes determining quantization matrices for use with at least two block sizes. The method further includes determining a first quantization matrix for a 32×32 chroma block of samples with respect to a first modification of a first scaling list for quantization of a block of samples smaller than 32×32, and determining, for blocks of another block size different than the 32×32 chroma block of samples, a second quantization matrix by modifying a second scaling list according to a second modification. The second scaling list is different from the first scaling list, and the first scaling list is a reference scaling list for video in 4:2:0 video format.Type: GrantFiled: April 26, 2019Date of Patent: April 7, 2020Assignee: SONY CORPORATIONInventors: James Alexander Gamei, Nicholas Ian Saunders, Karl James Sharman, Paul James Silcock
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Publication number: 20200014916Abstract: A video coding or decoding method in which luminance and chrominance samples in a 4:4:4 format or a 4:2:2 format are predicted from other respective samples according to a prediction direction associated with blocks of samples to be predicted; comprises detecting a prediction direction in respect of a current block to be predicted; generating a predicted block of chrominance samples according to other chrominance samples defined by the prediction direction; if the detected prediction direction is substantially vertical, filtering the left column of samples in the predicted block of chrominance samples, or if the detected prediction direction is substantially horizontal, filtering the top row of samples in the predicted block of chrominance samples; and encoding a difference between the filtered predicted chrominance block and the actual chrominance block or applying a decoded difference to the filtered predicted chrominance block so as to encode or decode the block respectively.Type: ApplicationFiled: September 16, 2019Publication date: January 9, 2020Applicant: SONY CORPORATIONInventors: James Alexander GAMEI, Nicholas Ian Saunders, Karl James Sharman, Paul James Silcock
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Patent number: 10531083Abstract: A video coding or decoding method in which luminance and chrominance samples are predicted from other respective reference samples according to a prediction direction associated with a current sample to be predicted, the chrominance samples having a lower horizontal and/or vertical sampling rate than the luminance samples so that the ratio of luminance horizontal resolution to chrominance horizontal resolution is different than the ratio of luminance vertical resolution to chrominance vertical resolution, so that a block of luminance samples has a different aspect ratio to a corresponding block of chrominance samples, the method including: detecting a first prediction direction defined in relation to a first grid of a first aspect ratio in respect of a set of current samples to be predicted; and applying a direction mapping to the prediction direction to generate a second prediction direction defined in relation to a second grid of a different aspect ratio.Type: GrantFiled: November 1, 2017Date of Patent: January 7, 2020Assignee: Sony CorporationInventors: James Alexander Gamei, Nicholas Ian Saunders, Karl James Sharman, Paul James Silcock
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Patent number: 10499052Abstract: A video coding or decoding method using inter-image prediction to encode input video data in which each chrominance component has 1/Mth of the horizontal resolution and 1/Nth of the vertical resolution of the luminance component, where M and N are integers equal to 1 or more, including storing one or more images preceding a current image, interpolating a higher resolution version of prediction units of the stored images so that the luminance component has a horizontal resolution P times that of the corresponding portion of the stored image and a vertical resolution Q times that of the corresponding portion of the stored image, detecting inter-image motion between a current image and the one or more interpolated stored images so as to generate motion vectors between a prediction unit of the current image and areas of the one or more preceding images, and generating a motion compensated prediction.Type: GrantFiled: March 22, 2019Date of Patent: December 3, 2019Assignee: Sony CorporationInventors: James Alexander Gamei, Nicholas Ian Saunders, Karl James Sharman, Paul James Silcock
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Patent number: 10440358Abstract: A video coding or decoding method using inter-image prediction to encode input video data in which each chrominance component has 1/Mth of the horizontal resolution of the luminance component and 1/Nth of the vertical resolution of the luminance component, where M and N are integers equal to 1 or more, comprises: storing one or more images preceding a current image; interpolating a higher resolution version of prediction units of the stored images; detecting inter-image motion between a current image and the one or more interpolated stored images so as to generate motion vectors between a prediction unit of the current image and areas of the one or more preceding images; and generating a motion compensated prediction of the prediction unit of the current image with respect to an area of an interpolated stored image pointed to by a respective motion vector.Type: GrantFiled: January 18, 2018Date of Patent: October 8, 2019Assignee: Sony CorporationInventors: James Alexander Gamei, Nicholas Ian Saunders, Karl James Sharman, Paul James Silcock
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Patent number: 10419750Abstract: A video coding or decoding method in which luminance and chrominance samples in a 4:4:4 format or a 4:2:2 format are predicted from other respective samples according to a prediction direction associated with blocks of samples to be predicted; comprises detecting a prediction direction in respect of a current block to be predicted; generating a predicted block of chrominance samples according to other chrominance samples defined by the prediction direction; if the detected prediction direction is substantially vertical, filtering the left column of samples in the predicted block of chrominance samples, or if the detected prediction direction is substantially horizontal, filtering the top row of samples in the predicted block of chrominance samples; and encoding a difference between the filtered predicted chrominance block and the actual chrominance block or applying a decoded difference to the filtered predicted chrominance block so as to encode or decode the block respectively.Type: GrantFiled: June 26, 2017Date of Patent: September 17, 2019Assignee: Sony CorporationInventors: James Alexander Gamei, Nicholas Ian Saunders, Karl James Sharman, Paul James Silcock
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Publication number: 20190253702Abstract: A video encoding method for encoding both the 4:2:0 video and 4:4:4 video formats. The method includes generating blocks of quantized spatial frequency data by quantizing coefficients and generating a matrix of data. The method further includes determining quantization matrices for use with at least two block sizes. The method further includes determining a first quantization matrix for a 32×32 chroma block of samples with respect to a first modification of a first scaling list for quantization of a block of samples smaller than 32×32, and determining, for blocks of another block size different than the 32×32 chroma block of samples, a second quantization matrix by modifying a second scaling list according to a second modification. The second scaling list is different from the first scaling list, and the first scaling list is a reference scaling list for video in 4:2:0 video format.Type: ApplicationFiled: April 26, 2019Publication date: August 15, 2019Applicant: SONY CORPORATIONInventors: James Alexander GAMEI, Nicholas Ian SAUNDERS, Karl James SHARMAN, Paul James SILCOCK
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Publication number: 20190222833Abstract: A video coding or decoding method using inter-image prediction to encode input video data in which each chrominance component has 1/Mth of the horizontal resolution and 1/Nth of the vertical resolution of the luminance component, where M and N are integers equal to 1 or more, including storing one or more images preceding a current image, interpolating a higher resolution version of prediction units of the stored images so that the luminance component has a horizontal resolution P times that of the corresponding portion of the stored image and a vertical resolution Q times that of the corresponding portion of the stored image, detecting inter-image motion between a current image and the one or more interpolated stored images so as to generate motion vectors between a prediction unit of the current image and areas of the one or more preceding images, and generating a motion compensated prediction.Type: ApplicationFiled: March 22, 2019Publication date: July 18, 2019Applicant: Sony CorporationInventors: James Alexander GAMEI, Nicholas Ian Saunders, Karl James Sharman, Paul James Silcock
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MODE-DEPENDENT COEFFICIENT SCANNING AND DIRECTIONAL TRANSFORMS FOR DIFFERENT COLOUR SAMPLING FORMATS
Publication number: 20190191154Abstract: A method of coding 4:2:2 or 4:4:4 video data comprises predicting luminance and/or chrominance samples of an image from other respective reference samples derived from the same image according to a prediction mode associated with a sample to be predicted, the prediction mode being selected for each of a plurality of blocks of samples, from a set of two or more candidate prediction modes; detecting differences between the samples and the respective predicted samples; selecting a frequency-separation transform from two or more candidate frequency separation transforms according to the prediction mode associated with a current block of samples using a mapping between transform and prediction mode, the mapping between different, as between chrominance and luminance samples, for at least the 4:4:4: format; and encoding the detected differences by frequency-separating the differences, using the selected frequency-separation transform.Type: ApplicationFiled: February 11, 2019Publication date: June 20, 2019Applicant: SONY CORPORATIONInventors: James Alexander GAMEI, Nicholas Ian Saunders, Karl James Sharman, Paul James Silcock -
Patent number: 10291909Abstract: A video coding or decoding method operable to generate blocks of quantized spatial frequency data by quantizing the video data according to a selected quantization step size and a matrix of data modifying the quantization step size for use at different respective block positions within an ordered block of samples, the method being operable with respect to at least two different chrominance subsampling formats.Type: GrantFiled: March 29, 2018Date of Patent: May 14, 2019Assignee: Sony CorporationInventors: James Alexander Gamei, Nicholas Ian Saunders, Karl James Sharman, Paul James Silcock
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Patent number: 10244232Abstract: A video coding or decoding method using inter-image prediction to encode input video data in which each chrominance component has 1/Mth of the horizontal resolution of the luminance component and 1/Nth of the vertical resolution of the luminance component, where M and N are integers equal to 1 or more, comprises: storing one or more images preceding a current image; interpolating a higher resolution version of prediction units of the stored images so that the luminance component of an interpolated prediction unit has a horizontal resolution P times that of the corresponding portion of the stored image and a vertical resolution Q times that of the corresponding portion of the stored image, where P and Q are integers greater than 1; detecting inter-image motion between a current image and the one or more interpolated stored images so as to generate motion vectors between a prediction unit of the current image and areas of the one or more preceding images; and generating a motion compensated prediction of the prType: GrantFiled: June 5, 2017Date of Patent: March 26, 2019Assignee: Sony CorporationInventors: James Alexander Gamei, Nicholas Ian Saunders, Karl James Sharman, Paul James Silcock