Patents by Inventor Salvatore La Rosa

Salvatore La Rosa 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).

  • Method for compression of image data and corresponding apparatus and computer-program product
    Patent number: 7616825
    Abstract: A method for compression includes applying a discrete cosine transform to said image data to obtain transform coefficients, quantizing the transform coefficients by applying a quantization level scaled through a gain value, adjusting the gain value as a function of desired image parameters by executing a first time said quantization operation applying a first gain value and obtaining first quantized data, estimating statistically a second gain value suitable to obtain the desired image parameters, and executing a second time said quantization operation applying said second gain value. The operation of statistical estimation of the second gain value includes evaluating a threshold value as a function of the desired image parameters and setting to zero a percentage of coefficients of the first quantized data as a function of the threshold value.
    Type: Grant
    Filed: December 5, 2005
    Date of Patent: November 10, 2009
    Assignee: STMicroelectronics S.R.L.
    Inventors: Arcangelo Ranieri Bruna, Giovanni Gallo, Sebastiano Battiato, Salvatore La Rosa
  • Method for compression of image data and corresponding apparatus and computer-program product
    Publication number: 20060159356
    Abstract: A method for compression includes applying a discrete cosine transform to said image data to obtain transform coefficients, quantizing the transform coefficients by applying a quantization level scaled through a gain value, adjusting the gain value as a function of desired image parameters by executing a first time said quantization operation applying a first gain value and obtaining first quantized data, estimating statistically a second gain value suitable to obtain the desired image parameters, and executing a second time said quantization operation applying said second gain value. The operation of statistical estimation of the second gain value includes evaluating a threshold value as a function of the desired image parameters and setting to zero a percentage of coefficients of the first quantized data as a function of the threshold value.
    Type: Application
    Filed: December 5, 2005
    Publication date: July 20, 2006
    Inventors: Arcangelo Bruna, Giovanni Gallo, Sebastiano Battiato, Salvatore La Rosa