Patents by Inventor Naito Tomoyuki

Naito Tomoyuki 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).

  • Post-processing technique for noise reduction of DCT-based compressed images
    Patent number: 7796834
    Abstract: A new post-processing methodology reduces the unwanted noise artifacts present in the output images of DCT-based compressed signals. The method determines noise intensity in the region of each pixel of an image and filters each pixel corresponding to this noise intensity. This noise intensity includes ringing intensity and block noise intensity. Determining the noise intensity includes calculating a short range power spectrum and a long range power spectrum. A spectrum is identified as ringing if the short range power spectrum is negative and the long range long range power spectrum is positive. A spectrum is identified as block noise if the short range autocorrelation coefficient is positive and the long range autocorrelation coefficient is positive.
    Type: Grant
    Filed: November 16, 2006
    Date of Patent: September 14, 2010
    Assignee: Texas Instruments Incorporated
    Inventors: Munenori Oizumi, Naito Tomoyuki
  • Post-Processing Technique for Noise Reduction of DCT-Based Compressed Images
    Publication number: 20080118177
    Abstract: A new post-processing methodology reduces the unwanted noise artifacts present in the output images of DCT-based compressed signals. The method determines noise intensity in the region of each pixel of an image and filters each pixel corresponding to this noise intensity. This noise intensity includes ringing intensity and block noise intensity. Determining the noise intensity includes calculating a short range power spectrum and a long range power spectrum. A spectrum is identified as ringing if the short range power spectrum is negative and the long range long range power spectrum is positive. A spectrum is identified as block noise if the short range autocorrelation coefficient is positive and the long range autocorrelation coefficient is positive.
    Type: Application
    Filed: November 16, 2006
    Publication date: May 22, 2008
    Inventors: Munenori Oizumi, Naito Tomoyuki