Involving Variable Length Or Entropy Coding, E.g., Huffmann Or Arithmetic Coding (epo) Patents (Class 375/E7.033)
  • Image coding method and image decoding method
    Patent number: 8953692
    Abstract: An image coding method for improving coding efficiency by using more appropriate probability information is provided. The image coding method includes: a first coding step of coding a first set of blocks included in a first region sequentially based on first probability information; and a second coding step of coding a second set of blocks included in a second region sequentially based on second probability information. In the first coding step, the first probability information is updated depending on data of a target block to be coded, after coding the target block and before coding a next target block. In the second coding step, the second probability information is updated depending on the first probability information updated in the first coding step, before coding the first target block.
    Type: Grant
    Filed: January 24, 2014
    Date of Patent: February 10, 2015
    Assignee: Panasonic Intellectual Property Corporation of America
    Inventors: Takeshi Tanaka, Hisao Sasai
  • Image coding method and image decoding method
    Patent number: 8718149
    Abstract: An image coding method for improving coding efficiency by using more appropriate probability information is provided. The image coding method includes: a first coding step of coding a first set of blocks included in a first region sequentially based on first probability information; and a second coding step of coding a second set of blocks included in a second region sequentially based on second probability information. In the first coding step, the first probability information is updated depending on data of a target block to be coded, after coding the target block and before coding a next target block. In the second coding step, the second probability information is updated depending on the first probability information updated in the first coding step, before coding the first target block.
    Type: Grant
    Filed: October 13, 2010
    Date of Patent: May 6, 2014
    Assignee: Panasonic Corporation
    Inventors: Takeshi Tanaka, Hisao Sasai