Patents by Inventor Angelos D. Liveris

Angelos D. Liveris 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: 8245119
    Abstract: Code designs for channel coding with side information (CCSI) based on combined source-channel coding are disclosed. These code designs combine trellis-coded quantization (TCQ) with irregular repeat accumulate (IRA) codes. The EXIT chart technique is used for IRA channel code design (and especially for capacity-approaching IRA channel code design). We emphasize the role of strong source coding and endeavor to achieve as much granular gain as possible by using TCQ. These code designs synergistically combine TCQ with IRA codes. By bringing together TCQ and EXIT chart-based IRA code designs, we are able to approach the theoretical limit of dirty-paper coding.
    Type: Grant
    Filed: August 29, 2011
    Date of Patent: August 14, 2012
    Assignee: The Texas A&M University System
    Inventors: Yong Sun, Angelos D. Liveris, Vladimir M. Stankovic, Zixiang Xiong
  • Publication number: 20110311003
    Abstract: Code designs for channel coding with side information (CCSI) based on combined source-channel coding are disclosed. These code designs combine trellis-coded quantization (TCQ) with irregular repeat accumulate (IRA) codes. The EXIT chart technique is used for IRA channel code design (and especially for capacity-approaching IRA channel code design). We emphasize the role of strong source coding and endeavor to achieve as much granular gain as possible by using TCQ. These code designs synergistically combine TCQ with IRA codes. By bringing together TCQ and EXIT chart-based IRA code designs, we are able to approach the theoretical limit of dirty-paper coding.
    Type: Application
    Filed: August 29, 2011
    Publication date: December 22, 2011
    Applicant: THE TEXAS A&M UNIVERSITY SYSTEM
    Inventors: Yong Sun, Angelos D. Liveris, Vladimir M. Stankovic, Zixiang Xiong
  • Patent number: 8065592
    Abstract: System and method for designing Slepian-Wolf codes by channel code partitioning. A generator matrix is partitioned to generate a plurality of sub-matrices corresponding respectively to a plurality of correlated data sources. The partitioning is performed in accordance with a rate allocation among the plurality of correlated data sources. A corresponding plurality of parity matrices are generated based respectively on the sub-matrices, where each parity matrix is useable to encode data from a respective one of the correlated data sources.
    Type: Grant
    Filed: July 30, 2010
    Date of Patent: November 22, 2011
    Assignee: The Texas A&M University System
    Inventors: Vladimir M. Stankovic, Angelos D. Liveris, Zixiang Xiong, Costas N. Georghiades
  • Patent number: 8020082
    Abstract: Code designs for channel coding with side information (CCSI) based on combined source-channel coding are disclosed. These code designs combine trellis-coded quantization (TCQ) with irregular repeat accumulate (IRA) codes. The EXIT chart technique is used for IRA channel code design (and especially for capacity-approaching IRA channel code design). We emphasize the role of strong source coding and endeavor to achieve as much granular gain as possible by using TCQ. These code designs synergistically combine TCQ with IRA codes. By bringing together TCQ and EXIT chart-based IRA code designs, we are able to approach the theoretical limit of dirty-paper coding.
    Type: Grant
    Filed: March 9, 2007
    Date of Patent: September 13, 2011
    Assignee: The Texas A & M University System
    Inventors: Yong Sun, Angelos D. Liveris, Vladimir M. Stanković, Zixiang Xiong
  • Publication number: 20110029846
    Abstract: System and method for designing Slepian-Wolf codes by channel code partitioning. A generator matrix is partitioned to generate a plurality of sub-matrices corresponding respectively to a plurality of correlated data sources. The partitioning is performed in accordance with a rate allocation among the plurality of correlated data sources. A corresponding plurality of parity matrices are generated based respectively on the sub-matrices, where each parity matrix is useable to encode data from a respective one of the correlated data sources.
    Type: Application
    Filed: July 30, 2010
    Publication date: February 3, 2011
    Applicant: THE TEXAS A&M UNIVERSITY SYSTEM
    Inventors: Vladimir M. Stankovic, Angelos D. Liveris, Zixiang Xiong, Costas N. Georghiades
  • Patent number: 7779326
    Abstract: System and method for designing Slepian-Wolf codes by channel code partitioning. A generator matrix is partitioned to generate a plurality of sub-matrices corresponding respectively to a plurality of correlated data sources. The partitioning is performed in accordance with a rate allocation among the plurality of correlated data sources. A corresponding plurality of parity matrices are generated based respectively on the sub-matrices, where each parity matrix is useable to encode data from a respective one of the correlated data sources.
    Type: Grant
    Filed: March 1, 2005
    Date of Patent: August 17, 2010
    Assignee: The Texas A&M University System
    Inventors: Vladimir M. Stankovic, Angelos D. Liveris, Zixiang Xiong, Costas N. Georghiades
  • Patent number: 7653867
    Abstract: System and method for Slepian-Wolf coding using channel code partitioning. A generator matrix is partitioned to generate multiple sub-matrices corresponding respectively to multiple correlated data sources. The partitioning is in accordance with a rate allocation among the correlated data sources. Corresponding parity matrices may be generated respectively from the sub-matrices, where each parity matrix is useable to encode correlated data for a respective correlated data source, resulting in respective syndromes, e.g., in the form of binary vectors. A common receiver may receive the syndromes and expand them to a common length by inserting zeros appropriately. The expanded syndromes may be vector summed (e.g., modulo 2), and a single channel decoding applied to determine a closest codeword, portions of whose systematic part may be multiplied by respective submatrices of the generator matrix, which products may be added to the respective expanded syndromes to produce estimates of the source data.
    Type: Grant
    Filed: March 22, 2005
    Date of Patent: January 26, 2010
    Assignee: The Texas A&M University System
    Inventors: Vladimir M. Stankovic, Angelos D. Liveris, Zixiang Xiong, Costas N. Georghiades
  • Patent number: 7649479
    Abstract: A system and method for realizing a Wyner-Ziv encoder may involve the following steps: (a) apply nested quantization to input data from an information source in order to generate intermediate data; and (b) encode the intermediate data using an asymmetric Slepian-Wolf encoder in order to generate compressed output data representing the input data. Similarly, a Wyner-Ziv decoder may be realized by: (1) applying an asymmetric Slepian-Wolf decoder to compressed input data using side information to generate intermediate values, and (b) jointly decoding the intermediate values using the side information to generate decompressed output data.
    Type: Grant
    Filed: October 8, 2007
    Date of Patent: January 19, 2010
    Inventors: Zhixin Liu, Samuel S. Cheng, Angelos D. Liveris, Zixiang Xiong
  • Patent number: 7602317
    Abstract: A system and method for realizing a Wyner-Ziv encoder may involve the following steps: (a) apply nested quantization to input data from an information source in order to generate intermediate data; and (b) encode the intermediate data using an asymmetric Slepian-Wolf encoder in order to generate compressed output data representing the input data. Similarly, a Wyner-Ziv decoder may be realized by: (1) applying an asymmetric Slepian-Wolf decoder to compressed input data using side information to generate intermediate values, and (b) jointly decoding the intermediate values using the side information to generate decompressed output data.
    Type: Grant
    Filed: October 8, 2007
    Date of Patent: October 13, 2009
    Inventors: Zhixin Liu, Samuel S. Cheng, Angelos D. Liveris, Zixiang Xiong
  • Patent number: 7420484
    Abstract: A system and method for realizing a Wyner-Ziv encoder may involve the following steps: (a) apply nested quantization to input data from an information source in order to generate intermediate data; and (b) encode the intermediate data using an asymmetric Slepian-Wolf encoder in order to generate compressed output data representing the input data. Similarly, a Wyner-Ziv decoder may be realized by: (1) applying an asymmetric Slepian-Wolf decoder to compressed input data using side information to generate intermediate values, and (b) jointly decoding the intermediate values using the side information to generate decompressed output data.
    Type: Grant
    Filed: October 8, 2007
    Date of Patent: September 2, 2008
    Assignee: The Texas A&M University System
    Inventors: Zhixin Liu, Samuel S. Cheng, Angelos D. Liveris, Zixiang Xiong
  • Patent number: 7295137
    Abstract: A system and method for realizing a Wyner-Ziv encoder may involve the following steps: (a) apply nested quantization to input data from an information source in order to generate intermediate data; and (b) encode the intermediate data using an asymmetric Slepian-Wolf encoder in order to generate compressed output data representing the input data. Similarly, a Wyner-Ziv decoder may be realized by: (1) applying an asymmetric Slepian-Wolf decoder to compressed input data using side information to generate intermediate values, and (b) jointly decoding the intermediate values using the side information to generate decompressed output data.
    Type: Grant
    Filed: March 22, 2005
    Date of Patent: November 13, 2007
    Assignee: The Texas A&M University System
    Inventors: Zhixin Liu, Samuel S. Cheng, Angelos D. Liveris, Zixiang Xiong
  • Publication number: 20070217522
    Abstract: Code designs for channel coding with side information (CCSI) based on combined source-channel coding are disclosed. These code designs combine trellis-coded quantization (TCQ) with irregular repeat accumulate (IRA) codes. The EXIT chart technique is used for IRA channel code design (and especially for capacity-approaching IRA channel code design). We emphasize the role of strong source coding and endeavor to achieve as much granular gain as possible by using TCQ. These code designs synergistically combine TCQ with IRA codes. By bringing together TCQ and EXIT chart-based IRA code designs, we are able to approach the theoretical limit of dirty-paper coding.
    Type: Application
    Filed: March 9, 2007
    Publication date: September 20, 2007
    Inventors: Yong Sun, Angelos D. Liveris, Vladimir M. Stankovic, Zixiang Xiong
  • Patent number: 7256716
    Abstract: A system and method for realizing a Wyner-Ziv encoder may involve the following steps: (a) applying nested quantization to input data from an information source in order to generate intermediate data; and (b) encoding the intermediate data using an asymmetric Slepian-Wolf encoder in order to generate compressed output data representing the input data. Similarly, a Wyner-Ziv decoder may be realized by applying an asymmetric Slepian-Wolf decoder to compressed input data (representing samples of a first source) to obtain intermediate values, and then, jointly decoding the intermediate values using side information (samples of a second source having known correlation with respect to the first source).
    Type: Grant
    Filed: March 1, 2005
    Date of Patent: August 14, 2007
    Assignee: The Texas A&M University System
    Inventors: Zhixin Liu, Samuel S. Cheng, Angelos D. Liveris, Zixiang Xiong