Patents by Inventor Alexander F. Keith

Alexander F. Keith 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: 7634145
    Abstract: A compression and decompression system in which a reversible wavelet filter are used to generates coefficients from input data, such as image data. The reversible wavelet filter is an efficient transform implemented with integer arithmetic that has exact reconstruction. The present invention uses the reversible wavelet filter in a lossless system (or lossy system) in which an embedded codestream is generated from the coefficients produced by the filter. An entropy coder performs entropy coding on the embedded codestream to produce the compressed data stream.
    Type: Grant
    Filed: May 30, 2006
    Date of Patent: December 15, 2009
    Assignees: Ricoh Co., Ltd., Ricoh Corporation
    Inventors: Alexander F. Keith, Edward L. Schwartz, Ahmad Zandi, Martin Boliek, Michael J. Gormish
  • Patent number: 7382925
    Abstract: A method and apparatus for encoding and decoding data that includes generating transformed signals in response to input data. In one embodiment, the transformed signals are generated using a reversible wavelet transform. The present invention also includes a method and apparatus for compressing the transform signals into data representing a losslessly compressed version of the input data. In one embodiment, the present invention decomposes the input data using reversible wavelet transforms.
    Type: Grant
    Filed: September 23, 2005
    Date of Patent: June 3, 2008
    Assignee: Ricoh Company, Ltd.
    Inventors: Martin Boliek, Michael J. Gormish, Alexander F. Keith, Edward L. Schwartz
  • Patent number: 7076104
    Abstract: A compression and decompression system in which a reversible wavelet filter are used to generates coefficients from input data, such as image data. The reversible wavelet filter is an efficient transform implemented with integer arithmetic that has exact reconstruction. The present invention uses the reversible wavelet filter in a lossless system (or lossy system) in which an embedded codestream is generated from the coefficients produced by the filter. An entropy coder performs entropy coding on the embedded codestream to produce the compressed data stream.
    Type: Grant
    Filed: January 25, 1999
    Date of Patent: July 11, 2006
    Assignees: Ricoh Co., LTD, Ricoh Corporation
    Inventors: Alexander F. Keith, Edward L. Schwartz, Ahmad Zandi, Martin Boliek, Michael J. Gormish
  • Patent number: 6996281
    Abstract: A method and apparatus for encoding and decoding data that includes generating transformed signals in response to input data. In one embodiment, the transformed signals are generated using a reversible wavelet transform. The present invention also includes a method and apparatus for compressing the transform signals into data representing a losslessly compressed version of the input data. In one embodiment, the present invention decomposes the input data using reversible wavelet transforms.
    Type: Grant
    Filed: November 19, 2003
    Date of Patent: February 7, 2006
    Assignee: Ricoh Co., Ltd.
    Inventors: Martin Boliek, Michael J. Gormish, Alexander F. Keith, Edward L. Schwartz
  • Patent number: 6757437
    Abstract: A compression and decompression system in which a reversible wavelet filter are used to generates coefficients from input data, such as image data. The reversible wavelet filter is an efficient transform implemented with integer arithmetic that has exact reconstruction. The present invention uses the reversible wavelet filter in a lossless system (or lossy system) in which an embedded codestream is generated from the coefficients produced by the filter. An entropy coder performs entropy coding on the embedded codestream to produce the compressed data stream.
    Type: Grant
    Filed: January 30, 2001
    Date of Patent: June 29, 2004
    Assignees: Ricoh Co., Ltd., Ricoh Corporation
    Inventors: Alexander F. Keith, Edward L. Schwartz, Ahmad Zandi, Martin Boliek, Michael J. Gormish
  • Patent number: 6754394
    Abstract: A method and apparatus for encoding and decoding data that includes generating transformed signals in response to input data. In one embodiment, the transformed signals are generated using a reversible wavelet transform. The present invention also includes a method and apparatus for compressing the transform signals into data representing a losslessly compressed version of the input data. In one embodiment, the present invention decomposes the input data using reversible wavelet transforms.
    Type: Grant
    Filed: May 1, 2000
    Date of Patent: June 22, 2004
    Assignee: Ricoh Company, Ltd.
    Inventors: Martin Boliek, Michael J. Gormish, Alexander F. Keith, Edward L. Schwartz
  • Publication number: 20040114810
    Abstract: A method and apparatus for encoding and decoding data that includes generating transformed signals in response to input data. In one embodiment, the transformed signals are generated using a reversible wavelet transform. The present invention also includes a method and apparatus for compressing the transform signals into data representing a losslessly compressed version of the input data. In one embodiment, the present invention decomposes the input data using reversible wavelet transforms.
    Type: Application
    Filed: November 19, 2003
    Publication date: June 17, 2004
    Inventors: Martin Boliek, Michael J. Gormish, Alexander F. Keith, Edward L. Schwartz
  • Publication number: 20020172429
    Abstract: A method and apparatus for encoding and decoding data that includes generating transformed signals in response to input data. In one embodiment, the transformed signals are generated using a reversible wavelet transform. The present invention also includes a method and apparatus for compressing the transform signals into data representing a losslessly compressed version of the input data. In one embodiment, the present invention decomposes the input data using reversible wavelet transforms.
    Type: Application
    Filed: May 1, 2000
    Publication date: November 21, 2002
    Inventors: Martin Boliek, Michael J. Gormish, Alexander F. Keith, Edward L. Schwartz
  • Patent number: 6141446
    Abstract: A method and apparatus for encoding and decoding data that includes generating transformed signals in response to input data. In one embodiment, the transformed signals are generated using a reversible wavelet transform. The present invention also includes a method and apparatus for compressing the transform signals into data representing a losslessly compressed version of the input data. In one embodiment, the present invention decomposes the input data using reversible wavelet transforms.
    Type: Grant
    Filed: September 30, 1997
    Date of Patent: October 31, 2000
    Assignee: Ricoh Company, Ltd.
    Inventors: Martin Boliek, Michael J. Gormish, Alexander F. Keith, Edward L. Schwartz
  • Patent number: 5966465
    Abstract: A compression and decompression system in which a reversible wavelet filter are used to generates coefficients from input data, such as image data. The reversible wavelet filter is an efficient transform implemented with integer arithmetic that has exact reconstruction. The present invention uses the reversible wavelet filter in a lossless system (or lossy system) in which an embedded codestream is generated from the coefficients produced by the filter. An entropy coder performs entropy coding on the embedded codestream to produce the compressed data stream.
    Type: Grant
    Filed: May 3, 1996
    Date of Patent: October 12, 1999
    Assignees: Ricoh Corporation, Ricoh Company, Ltd.
    Inventors: Alexander F. Keith, Edward L. Schwartz, Ahmad Zandi, Martin Boliek, Michael J. Gormish
  • Patent number: 5881176
    Abstract: A compression and decompression system in which a reversible wavelet filter are used to generates coefficients from input data, such as image data. The reversible wavelet filter is an efficient transform implemented with integer arithmetic that has exact reconstruction. The present invention uses the reversible wavelet filter in a lossless system (or lossy system) in which an embedded codestream is generated from the coefficients produced by the filter. An entropy coder performs entropy coding on the embedded codestream to produce the compressed data stream.
    Type: Grant
    Filed: May 3, 1996
    Date of Patent: March 9, 1999
    Assignees: Ricoh Corporation, Ricoh Company, LTD.
    Inventors: Alexander F. Keith, Edward L. Schwartz, Ahmad Zandi, Martin Boliek, Michael J. Gormish