Patents by Inventor Andrei Pascovici

Andrei Pascovici 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).

  • Publication number: 20050180547
    Abstract: A method and apparatus are provided for identifying a caller of a call from the caller to a recipient. A voice input is received from the caller, and characteristics of the voice input are applied to a plurality of acoustic models, which include a generic acoustic model and acoustic models of any previously identified callers, to obtain a plurality of respective acoustic scores. The caller is identified as one of the previously identified callers or as a new caller based on the plurality of acoustic scores. If the caller is identified as a new caller, a new acoustic model is generated for the new caller, which is specific to the new caller.
    Type: Application
    Filed: February 12, 2004
    Publication date: August 18, 2005
    Applicant: Microsoft Corporation
    Inventor: Andrei Pascovici
  • Patent number: 6185008
    Abstract: Tone reproduction of an image is improved by the use of error diffusion or dithering in the mapping of input pixel values on an input values scale to printer pixel values on a printer values scale, where the input values scale and the printer values scale both have more than two levels, to generate an image where a spatial average of printer values approximates a spatial average of the corresponding input values, as measured on the printer values scale. To improve the tone reproduction of reduced-resolution images, the printer pixel values are grouped into multi-pixel cells, printer pixel values within each cell are mapped to a font index value, and a font cell corresponding to the index level is printed at the location of the cell. The font set is chosen such that differences in total deposited ink between consecutive font cells is minimized.
    Type: Grant
    Filed: October 29, 1999
    Date of Patent: February 6, 2001
    Assignee: Seiko Epson Corporation
    Inventors: Joseph Shu, Andrei Pascovici, Chia-Hsin Li
  • Patent number: 6097502
    Abstract: Tone reproduction of an image is improved by the use of error diffusion or dithering in the mapping of input pixel values on an input values scale to printer pixel values on a printer values scale, where the input values scale and the printer values scale both have more than two levels, to generate an image where a spatial average of printer values approximates a spatial average of the corresponding input values, as measured on the printer values scale. To improve the tone reproduction of reduced-resolution images, the printer pixel values are grouped into multi-pixel cells, printer pixel values within each cell are mapped to a font index value, and a font cell corresponding to the index level is printed at the location of the cell. The font set is chosen such that differences in total deposited ink between consecutive font cells is minimized.
    Type: Grant
    Filed: October 2, 1997
    Date of Patent: August 1, 2000
    Assignee: Seiko Epson Corporation
    Inventors: Joseph Shu, Andrei Pascovici, Chia-Hsin Li
  • Patent number: 5920682
    Abstract: A technique for reducing image artifacts is described. The technique includes utilizing a clustered-dot dither matrix having a plurality of layers with each of the layers arranged in one of a plurality of complementary patterns within the dither matrix. By using a dither matrix which generates layers of dots in complementary patterns, image banding artifacts and ink bleeding characteristics resulting from a printer generating a halftone image using a clustered-dot dithering technique are reduced.
    Type: Grant
    Filed: September 20, 1996
    Date of Patent: July 6, 1999
    Assignee: Seiko Epson Corporation
    Inventors: Joseph Shu, Andrei Pascovici, Chia-Hsin Li
  • Patent number: 5883973
    Abstract: A multi-stage, preprocessing technique increases the quality of a monochrome or colored mixed-mode document printed on a binary-type printer. The document is preferably apportioned into a plurality of small tiles, each of which provides information to the inventive technique for eventually defining the modes as either text or images. The multi-stage technique comprises a first stage for normalizing a non-ideal histogram of the mixed-mode document to a histogram having an ideal distribution of selected pixel values. A second stage classifies each tile as either text, image or background, while a third stage collates groups of tiles in both vertical and horizontal directions to remove variances in the document. Those portions of the document classified as images are then halftone processed, while the text areas are threshold processed to thereby significantly improve the reproduction quality of the printed document.
    Type: Grant
    Filed: February 20, 1996
    Date of Patent: March 16, 1999
    Assignee: Seiko Epson Corporation
    Inventors: Andrei Pascovici, Joseph S. Shu
  • Patent number: 5799136
    Abstract: An ink-jet-printer driver employs clustered-dot dither to generate binary image signals that represent an image that has been adjusted for the ink-duty limit that must be imposed to avoid bleeding on some print media. To impose the limit, a Bayer dither process (94) receives an input that represents the ratio of ink-limit-adjusted ink duty to unadjusted ink duty. A gating operation (96) permits an ink request only at those locations where both dither processes (92 and 94) indicate that an ink is permitted.
    Type: Grant
    Filed: May 28, 1996
    Date of Patent: August 25, 1998
    Assignee: Seiko Epson Corporation
    Inventors: Chia-Hsin Li, Andrei Pascovici, Joseph S. Shu, Dennis L. Chao