Patents by Inventor Athanasios Skodras

Athanasios Skodras 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).

  • Down scaling of images
    Patent number: 7388913
    Abstract: A Discrete Cosine Transform (DCT) for an entire original sequence is obtained using the DCT coefficients representing the first half and the second half of the original sequence. This is useful when calculation of DCTs of a certain length is supported by hardware and/or software and different size DCTs must be calculated. Example areas of application include still image and video transcoding and scalable image and/or video coding.
    Type: Grant
    Filed: September 13, 1999
    Date of Patent: June 17, 2008
    Assignee: Telefonaktiebolaget LM Ericsson (pub)
    Inventors: Charilaos Christopoulos, Athanasios Skodras
  • Efficient down-scaling of DCT compressed images
    Patent number: 6868188
    Abstract: In a method and a device for calculation of the Discrete Cosine Transform (DCT) only the DCT coefficients representing the first half and the second half of an original sequence are required for obtaining the DCT for the entire original sequence. The device and the method are therefore very useful when calculations of DCTs of a certain length is supported by hardware and/or software, and when DCTs of other sizes are desired. Areas of application are for example still image and video transcoding, as well as scalable image and/or video coding and decoding.
    Type: Grant
    Filed: February 13, 2001
    Date of Patent: March 15, 2005
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Athanasios Skodras, Charilaos Christopoulos
  • Efficient down-scaling of DCT compressed images
    Publication number: 20010006561
    Abstract: In a method and a device for calculation of the Discrete Cosine Transform (DCT) only the DCT coefficients representing the first half and the second half of an original sequence are required for obtaining the DCT for the entire original sequence. The device and the method are therefore very useful when calculations of DCTs of a certain length is supported by hardware and/or software, and when DCTs of other sizes are desired. Areas of application are for example still image and video transcoding, as well as scalable image and/or video coding and decoding.
    Type: Application
    Filed: February 13, 2001
    Publication date: July 5, 2001
    Inventors: Athanasios Skodras, Charilaos Christopoulos