Patents by Inventor Per Rune Albin Ekstrand

Per Rune Albin Ekstrand 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).

  • Source coding enhancement using spectral-band replication
    Patent number: 7328162
    Abstract: The present invention proposes a new method and apparatus for the enhancement of source coding systems. The invention employs bandwidth reduction (101) prior to or in the encoder (103), followed by spectral-band replication (105) at the decoder (107). This is accomplished by the use of new transposition methods, in combination with spectral envelope adjustments. Reduced bitrate at a given perceptual quality or an improved perceptual quality at a given bitrate is offered. The invention is preferably integrated in a hardware or software codec, but can also be implemented as a separate processor in combination with a codec. The invention offers substantial improvements practically independent of codec type and technological progress.
    Type: Grant
    Filed: October 9, 2003
    Date of Patent: February 5, 2008
    Assignee: Coding Technologies AB
    Inventors: Lars Gustaf Liljeryd, Per Rune Albin Ekstrand, Lars Fredrik Henn, Hans Magnus Kristofer Kjörling
  • Source coding enhancement using spectral-band replication
    Patent number: 7283955
    Abstract: The present invention proposes a new method and apparatus for the enhancement of source coding systems. The invention employs bandwidth reduction (101) prior to or in the encoder (103), followed by spectral-band replication (105) at the decoder (107). This is accomplished by the use of new transposition methods, in combination with spectral envelope adjustments. Reduced bitrate at a given perceptual quality or an improved perceptual quality at a given bitrate is offered. The invention is preferably integrated in a hardware or software codec, but can also be implemented as a separate processor in combination with a codec. The invention offers substantial improvements practically independent f codec type and technological progress.
    Type: Grant
    Filed: October 10, 2003
    Date of Patent: October 16, 2007
    Assignee: Coding Technologies AB
    Inventors: Lars Gustaf Liljeryd, Per Rune Albin Ekstrand, Lars Fredrik Henn, Hans Magnus Kristofer Kjorling
  • Source coding enhancement using spectral-band replication
    Patent number: 6925116
    Abstract: The present invention proposes a new method and apparatus for the enhancement of source coding systems. The invention employs bandwidth reduction (101) prior to or in the encoder (103), followed by spectral-band replication (105) at the decoder (107). This is accomplished by the use of new transposition methods, in combination with spectral envelope adjustments. Reduced bitrate at a given perceptual quality or an improved perceptual quality at a given bitrate is offered. The invention is preferably integrated in a hardware or software codec, but can also be implemented as a separate processor in combination with a codec. The invention offers substantial improvements practically independent of codec type and technological progress.
    Type: Grant
    Filed: October 8, 2003
    Date of Patent: August 2, 2005
    Assignee: Coding Technologies AB
    Inventors: Lars Gustaf Liljeryd, Per Rune Albin Ekstrand, Lars Fredrik Henn, Hans Magnus Kristofer Kjorling
  • Source coding enhancement using spectral-band replication
    Publication number: 20040125878
    Abstract: The present invention proposes a new method and apparatus for the enhancement of source coding systems. The invention employs bandwidth reduction (101) prior to or in the encoder (103), followed by spectral-band replication (105) at the decoder (107). This is accomplished by the use of new transposition methods, in combination with spectral envelope adjustments. Reduced bitrate at a given perceptual quality or an improved perceptual quality at a given bitrate is offered. The invention is preferably integrated in a hardware or software codec, but can also be implemented as a separate processor in combination with a codec. The invention offers substantial improvements practically independent of codec type and technological progress.
    Type: Application
    Filed: October 8, 2003
    Publication date: July 1, 2004
    Applicant: CODING TECHNOLOGIES SWEDEN AB
    Inventors: Lars Gustaf Liljeryd, Per Rune Albin Ekstrand, Lars Fredrik Henn, Hans Magnus Kristofer Kjorling
  • Source coding enhancement using spectral-band replication
    Publication number: 20040078194
    Abstract: The present invention proposes a new method and apparatus for the enhancement of source coding systems. The invention employs bandwidth reduction (101) prior to or in the encoder (103), followed by spectral-band replication (105) at the decoder (107). This is accomplished by the use of new transposition methods, in combination with spectral envelope adjustments. Reduced bitrate at a given perceptual quality or an improved perceptual quality at a given bitrate is offered. The invention is preferably integrated in a hardware or software codec, but can also be implemented as a separate processor in combination with a codec. The invention offers substantial improvements practically independent of codec type and technological progress.
    Type: Application
    Filed: October 9, 2003
    Publication date: April 22, 2004
    Applicant: CODING TECHNOLOGIES SWEDEN AB
    Inventors: Lars Gustaf Liljeryd, Per Rune Albin Ekstrand, Lars Fredrik Henn, Hans Magnus Kristofer Kjorling
  • Source coding enhancement using spectral-band replication
    Publication number: 20040078205
    Abstract: The present invention proposes a new method and apparatus for the enhancement of source coding systems. The invention employs bandwidth reduction (101) prior to or in the encoder (103), followed by spectral-band replication (105) at the decoder (107). This is accomplished by the use of new transposition methods, in combination with spectral envelope adjustments. Reduced bitrate at a given perceptual quality or an improved perceptual quality at a given bitrate is offered. The invention is preferably integrated in a hardware or software codec, but can also be implemented as a separate processor in combination with a codec. The invention offers substantial improvements practically independent f codec type and technological progress.
    Type: Application
    Filed: October 10, 2003
    Publication date: April 22, 2004
    Applicant: CODING TECHNOLOGIES SWEDEN AB
    Inventors: Lars Gustaf Liljeryd, Per Rune Albin Ekstrand, Lars Frederik Henn, Hans Magnus Kristofer Kjorling
  • Source coding enhancement using spectral-band replication
    Patent number: 6680972
    Abstract: The present invention proposes a new method and apparatus for the enhancement of source coding systems. The invention employs bandwidth reduction 101 prior to or in the encoder 103, followed by spectral-band replication 105 at the decoder 107. This is accomplished by the use of new transposition methods, in combination with spectral envelope adjustments. Reduced bitrate at a given perceptual quality or an improved perceptual quality at a given bitrate is offered. The invention is preferably integrated in a hardware or software codec, but can also be implemented as a separate processor in combination with a codec. The invention offers substantial improvements practically independent of codec type and technological progress.
    Type: Grant
    Filed: February 9, 1999
    Date of Patent: January 20, 2004
    Assignee: Coding Technologies Sweden AB
    Inventors: Lars Gustaf Liljeryd, Per Rune Albin Ekstrand, Lars Fredrik Henn, Hans Magnus Kristofer Kjörling