Patents by Inventor Chengjie Tu

Chengjie Tu 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: 20200221091
    Abstract: A digital media encoder/decoder uses a flexible quantization technique that provides the ability to vary quantization along various dimensions of the encoded digital media data, including spatial, frequency sub bands and color channels. The codec utilizes a signaling scheme to signal various permutations of flexible quantization combinations efficiently for primary usage scenarios. When a choice of quantizer is available, the codec efficiently encodes the current quantizer by defining a subset of quantizers and indexes the current quantizer from the set.
    Type: Application
    Filed: March 20, 2020
    Publication date: July 9, 2020
    Applicant: Microsoft Technology Licensing, LLC
    Inventors: Chengjie Tu, Sridhar Srinivasan
  • Patent number: 10602146
    Abstract: A digital media encoder/decoder uses a flexible quantization technique that provides the ability to vary quantization along various dimensions of the encoded digital media data, including spatial, frequency sub bands and color channels. The codec utilizes a signaling scheme to signal various permutations of flexible quantization combinations efficiently for primary usage scenarios. When a choice of quantizer is available, the codec efficiently encodes the current quantizer by defining a subset of quantizers and indexes the current quantizer from the set.
    Type: Grant
    Filed: May 7, 2018
    Date of Patent: March 24, 2020
    Assignee: Microsoft Technology Licensing, LLC
    Inventors: Chengjie Tu, Sridhar Srinivasan
  • Patent number: 10506244
    Abstract: Systems and methods for encoding and decoding video data are disclosed. The method can include signaling in syntax information a picture parameter set (PPS) indicating a first tile size partition. The method can also include storing a plurality of tile size partitions and associated PPS identifiers (PPSID) in a database. If a second tile size partition for a second frame of video data is the same as a tile size partition stored in the database, the method can include signaling the PPSID for the corresponding tile size partition. If the second tile size partition is not the same as a tile size partition stored in the database, the method can include signaling a new PPS with the second tile size partition. The system can provide an encoder and a decoder for processing the video data encoded by the method for encoding video data.
    Type: Grant
    Filed: July 8, 2015
    Date of Patent: December 10, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Xianglin Wang, Chengjie Tu, Wei-Jung Chien, In Suk Chong, Siping Tao, Marta Karczewicz
  • Publication number: 20190313099
    Abstract: Techniques and tools for encoding enhancement layer video with quantization that varies spatially and/or between color channels are presented, along with corresponding decoding techniques and tools. For example, an encoding tool determines whether quantization varies spatially over a picture, and the tool also determines whether quantization varies between color channels in the picture. The tool signals quantization parameters for macroblocks in the picture in an encoded bit stream. In some implementations, to signal the quantization parameters, the tool predicts the quantization parameters, and the quantization parameters are signaled with reference to the predicted quantization parameters. A decoding tool receives the encoded bit stream, predicts the quantization parameters, and uses the signaled information to determine the quantization parameters for the macroblocks of the enhancement layer video. The decoding tool performs inverse quantization that can vary spatially and/or between color channels.
    Type: Application
    Filed: April 15, 2019
    Publication date: October 10, 2019
    Applicant: Microsoft Technology Licensing, LLC
    Inventors: Shankar Regunathan, Shijun Sun, Chengjie Tu, Chih-Lung Lin
  • Patent number: 10382755
    Abstract: A device for encoding video data may be configured to encode video data according to a set of sample adaptive offset (SAO) types; perform a plurality of coding passes to test a subset of the SAO types for a first block of video data, wherein the subset is smaller than the set; select from the subset of SAO types an SAO type for the first block of video data; and generate for inclusion in an encoded bitstream, information for identifying the selected SAO type for the first block.
    Type: Grant
    Filed: January 22, 2018
    Date of Patent: August 13, 2019
    Assignee: Qualcomm Incorporated
    Inventors: In Suk Chong, Geert Van der Auwera, Chengjie Tu, Xianglin Wang, Marta Karczewicz
  • Patent number: 10382791
    Abstract: The disclosure provides a system and methods for encoding video data. The method can include storing a data structure in a memory, the data structure having a first plurality of data elements arranged corresponding to a second plurality of data elements of a first video data block, and defining a periphery, the data structure further including data related to all of a smallest prediction unit (PU) for the first video data block. The method can also include increasing a size of the data structure in the memory by adding a plurality of extended units along the periphery of the first plurality of data elements, each extended unit having data related to a smallest data element of the first video data block, the extended units being set to default values. The method can also comprise encoding the first video data block based on the data structure.
    Type: Grant
    Filed: May 28, 2015
    Date of Patent: August 13, 2019
    Assignee: Qualcomm Incorporated
    Inventors: Wei-Jung Chien, Chengjie Tu, Xianglin Wang, Muhammed Zeyd Coban
  • Patent number: 10306227
    Abstract: Techniques and tools for encoding enhancement layer video with quantization that varies spatially and/or between color channels are presented, along with corresponding decoding techniques and tools. For example, an encoding tool determines whether quantization varies spatially over a picture, and the tool also determines whether quantization varies between color channels in the picture. The tool signals quantization parameters for macroblocks in the picture in an encoded bit stream. In some implementations, to signal the quantization parameters, the tool predicts the quantization parameters, and the quantization parameters are signaled with reference to the predicted quantization parameters. A decoding tool receives the encoded bit stream, predicts the quantization parameters, and uses the signaled information to determine the quantization parameters for the macroblocks of the enhancement layer video. The decoding tool performs inverse quantization that can vary spatially and/or between color channels.
    Type: Grant
    Filed: December 27, 2016
    Date of Patent: May 28, 2019
    Assignee: Microsoft Technology Licensing, LLC
    Inventors: Shankar Regunathan, Shijun Sun, Chengjie Tu, Chih-Lung Lin
  • Patent number: 10250905
    Abstract: Techniques and tools for conversion operations between modules in a scalable video encoding tool or scalable video decoding tool are described. For example, given reconstructed base layer video in a low resolution format (e.g., 4:2:0 video with 8 bits per sample) an encoding tool and decoding tool adaptively filter the reconstructed base layer video and upsample its sample values to a higher sample depth (e.g., 10 bits per sample). The tools also adaptively scale chroma samples to a higher chroma sampling rate (e.g., 4:2:2). The adaptive filtering and chroma scaling help reduce energy in inter-layer residual video by making the reconstructed base layer video closer to input video, which typically makes compression of the inter-layer residual video more efficient. The encoding tool also remaps sample values of the inter-layer residual video to adjust dynamic range before encoding, and the decoding tool performs inverse remapping after decoding.
    Type: Grant
    Filed: January 12, 2017
    Date of Patent: April 2, 2019
    Assignee: Microsoft Technology Licensing, LLC
    Inventors: Shijun Sun, Shankar Regunathan, Chengjie Tu, Chih-Lung Lin
  • Publication number: 20180359475
    Abstract: A digital media encoder/decoder uses a flexible quantization technique that provides the ability to vary quantization along various dimensions of the encoded digital media data, including spatial, frequency sub bands and color channels. The codec utilizes a signaling scheme to signal various permutations of flexible quantization combinations efficiently for primary usage scenarios. When a choice of quantizer is available, the codec efficiently encodes the current quantizer by defining a subset of quantizers and indexes the current quantizer from the set.
    Type: Application
    Filed: May 7, 2018
    Publication date: December 13, 2018
    Applicant: Microsoft Technology Licensing, LLC
    Inventors: Chengjie Tu, Sridhar Srinivasan
  • Patent number: 10085027
    Abstract: A video encoding device comprises a memory configured and at least one processor configured to: determine whether a metric meets a condition based on statistics, wherein the statistics are associated with a first video encoding mode checking order and a second video encoding mode checking order, responsive to determining that the metric meets the condition, select a first encoding mode checking order to encode the first block of video data responsive to determining that the condition is not met, select a second encoding mode checking order different from the first encoding mode checking order to encode the first block of video data, update the statistics based on the selected first or second encoding mode checking order, and encode a second block of video data, based on the updated statistics, and using the first or second mode checking order.
    Type: Grant
    Filed: June 11, 2015
    Date of Patent: September 25, 2018
    Assignee: QUALCOMM Incorporated
    Inventors: Chengjie Tu, Wei-Jung Chien, Xianglin Wang, Jaehong Chon, In Suk Chong, Marta Karczewicz, Woo-Shik Kim, Xin Zhao
  • Patent number: 10075711
    Abstract: A system, a method and computer-readable media for encoding image data into a compressed bitstream. A mode selection component is configured to select a mode of operation for use in encoding image data. A spatial mode encoder is utilized when the mode selection component selects a spatial mode of operation. The spatial mode encoder is configured to encode the image data into packets by organizing the image data in accordance with a spatial partitioning. A frequency mode encoder is utilized when the mode selection component selects a frequency mode of operation. The frequency mode encoder is configured to encode the image data into packets by organizing the image data in accordance with a frequency ordering.
    Type: Grant
    Filed: July 18, 2016
    Date of Patent: September 11, 2018
    Assignee: Microsoft Technology Licensing, LLC
    Inventors: Chengjie Tu, Sridhar Srinivasan
  • Publication number: 20180146194
    Abstract: A device for encoding video data may be configured to encode video data according to a set of sample adaptive offset (SAO) types; perform a plurality of coding passes to test a subset of the SAO types for a first block of video data, wherein the subset is smaller than the set; select from the subset of SAO types an SAO type for the first block of video data; and generate for inclusion in an encoded bitstream, information for identifying the selected SAO type for the first block.
    Type: Application
    Filed: January 22, 2018
    Publication date: May 24, 2018
    Inventors: In Suk Chong, Geert Van der Auwera, Chengjie Tu, Xianglin Wang, Marta Karczewicz
  • Patent number: 9967561
    Abstract: A digital media encoder/decoder uses a flexible quantization technique that provides the ability to vary quantization along various dimensions of the encoded digital media data, including spatial, frequency sub bands and color channels. The codec utilizes a signaling scheme to signal various permutations of flexible quantization combinations efficiently for primary usage scenarios. When a choice of quantizer is available, the codec efficiently encodes the current quantizer by defining a subset of quantizers and indexes the current quantizer from the set.
    Type: Grant
    Filed: April 28, 2014
    Date of Patent: May 8, 2018
    Assignee: Microsoft Technology Licensing, LLC
    Inventors: Chengjie Tu, Sridhar Srinivasan
  • Patent number: 9883187
    Abstract: A video encoding device comprises a memory configured to store video data and at least one processor configured to: select one of a full rate-distortion (RD) checking scheme or a fast RD checking scheme, determine an RD cost associated with encoding a block of the video data based on the selected full RD checking scheme or fast RD checking scheme, determine a partitioning scheme for the block based on the determined RD cost, and encode the block using the determined partitioning scheme based on the determined RD cost.
    Type: Grant
    Filed: June 11, 2015
    Date of Patent: January 30, 2018
    Assignee: QUALCOMM Incorporated
    Inventors: Chengjie Tu, Wei-Jung Chien, Xianglin Wang, Jaehong Chon, In Suk Chong, Marta Karczewicz, Woo-Shik Kim, Xin Zhao
  • Patent number: 9877024
    Abstract: A device for encoding video data may be configured to encode video data according to a set of sample adaptive offset (SAO) types; perform a plurality of coding passes to test a subset of the SAO types for a first block of video data, wherein the subset is smaller than the set; select from the subset of SAO types an SAO type for the first block of video data; and generate for inclusion in an encoded bitstream, information for identifying the selected SAO type for the first block.
    Type: Grant
    Filed: September 16, 2015
    Date of Patent: January 23, 2018
    Assignee: QUALCOMM Incorporated
    Inventors: In Suk Chong, Geert Van der Auwera, Chengjie Tu, Xianglin Wang, Marta Karczewicz
  • Publication number: 20170127085
    Abstract: Techniques and tools for conversion operations between modules in a scalable video encoding tool or scalable video decoding tool are described. For example, given reconstructed base layer video in a low resolution format (e.g., 4:2:0 video with 8 bits per sample) an encoding tool and decoding tool adaptively filter the reconstructed base layer video and upsample its sample values to a higher sample depth (e.g., 10 bits per sample). The tools also adaptively scale chroma samples to a higher chroma sampling rate (e.g., 4:2:2). The adaptive filtering and chroma scaling help reduce energy in inter-layer residual video by making the reconstructed base layer video closer to input video, which typically makes compression of the inter-layer residual video more efficient. The encoding tool also remaps sample values of the inter-layer residual video to adjust dynamic range before encoding, and the decoding tool performs inverse remapping after decoding.
    Type: Application
    Filed: January 12, 2017
    Publication date: May 4, 2017
    Applicant: Microsoft Technology Licensing, LLC
    Inventors: Shijun Sun, Shankar Regunathan, Chengjie Tu, Chih-Lung Lin
  • Publication number: 20170111640
    Abstract: Techniques and tools for encoding enhancement layer video with quantization that varies spatially and/or between color channels are presented, along with corresponding decoding techniques and tools. For example, an encoding tool determines whether quantization varies spatially over a picture, and the tool also determines whether quantization varies between color channels in the picture. The tool signals quantization parameters for macroblocks in the picture in an encoded bit stream. In some implementations, to signal the quantization parameters, the tool predicts the quantization parameters, and the quantization parameters are signaled with reference to the predicted quantization parameters. A decoding tool receives the encoded bit stream, predicts the quantization parameters, and uses the signaled information to determine the quantization parameters for the macroblocks of the enhancement layer video. The decoding tool performs inverse quantization that can vary spatially and/or between color channels.
    Type: Application
    Filed: December 27, 2016
    Publication date: April 20, 2017
    Applicant: Microsoft Technology Licensing, LLC
    Inventors: Shankar Regunathan, Shijun Sun, Chengjie Tu, Chih-Lung Lin
  • Publication number: 20170104992
    Abstract: A system, a method and computer-readable media for encoding image data into a compressed bitstream. A mode selection component is configured to select a mode of operation for use in encoding image data. A spatial mode encoder is utilized when the mode selection component selects a spatial mode of operation. The spatial mode encoder is configured to encode the image data into packets by organizing the image data in accordance with a spatial partitioning. A frequency mode encoder is utilized when the mode selection component selects a frequency mode of operation. The frequency mode encoder is configured to encode the image data into packets by organizing the image data in accordance with a frequency ordering.
    Type: Application
    Filed: July 18, 2016
    Publication date: April 13, 2017
    Inventors: CHENGJIE TU, SRIDHAR SRINIVASAN
  • Patent number: 9571856
    Abstract: Techniques and tools for conversion operations between modules in a scalable video encoding tool or scalable video decoding tool are described. For example, given reconstructed base layer video in a low resolution format (e.g., 4:2:0 video with 8 bits per sample) an encoding tool and decoding tool adaptively filter the reconstructed base layer video and upsample its sample values to a higher sample depth (e.g., 10 bits per sample). The tools also adaptively scale chroma samples to a higher chroma sampling rate (e.g., 4:2:2). The adaptive filtering and chroma scaling help reduce energy in inter-layer residual video by making the reconstructed base layer video closer to input video, which typically makes compression of the inter-layer residual video more efficient. The encoding tool also remaps sample values of the inter-layer residual video to adjust dynamic range before encoding, and the decoding tool performs inverse remapping after decoding.
    Type: Grant
    Filed: August 25, 2008
    Date of Patent: February 14, 2017
    Assignee: Microsoft Technology Licensing, LLC
    Inventors: Shijun Sun, Shankar Regunathan, Chengjie Tu, Chih-Lung Lin
  • Patent number: 9571840
    Abstract: Techniques and tools for encoding enhancement layer video with quantization that varies spatially and/or between color channels are presented, along with corresponding decoding techniques and tools. For example, an encoding tool determines whether quantization varies spatially over a picture, and the tool also determines whether quantization varies between color channels in the picture. The tool signals quantization parameters for macroblocks in the picture in an encoded bit stream. In some implementations, to signal the quantization parameters, the tool predicts the quantization parameters, and the quantization parameters are signaled with reference to the predicted quantization parameters. A decoding tool receives the encoded bit stream, predicts the quantization parameters, and uses the signaled information to determine the quantization parameters for the macroblocks of the enhancement layer video. The decoding tool performs inverse quantization that can vary spatially and/or between color channels.
    Type: Grant
    Filed: June 17, 2014
    Date of Patent: February 14, 2017
    Assignee: Microsoft Technology Licensing, LLC
    Inventors: Shankar Regunathan, Shijun Sun, Chengjie Tu, Chih-Lung Lin