Patents Assigned to XVD Corporation
  • Method and apparatus for audio compression
    Patent number: 7181404
    Abstract: A method and apparatus for audio compression receives an audio signal. Transform coding is applied to the audio signal to generate a sequence of transform frequency coefficients. The sequence of transform frequency coefficients is partitioned into a plurality of non-uniform width frequency ranges and then zero value frequency coefficients are inserted at the boundaries of the non-uniform width frequency ranges. As a result, certain of the transform frequency coefficients that represent high frequencies are dropped.
    Type: Grant
    Filed: March 11, 2005
    Date of Patent: February 20, 2007
    Assignee: XVD Corporation
    Inventors: Victor D. Kolesnik, Boris D. Kudryashov, Sergey Petrov, Evgeny Ovsyannikov, Boris Trojanovsky, Andrey Trofimov
  • Apparatus and method for memory saving wavelet based video coding
    Patent number: 6973127
    Abstract: A method and apparatus for compressing video signals. The video compression may include row by row horizontal subband filtering of video data representing part of an image, and row by row concurrent vertical high and vertical low pass subband filtering of the results of the horizontal subband filtering. Less than the vertical filter length of rows of results of the horizontal subband filtering may be buffered at a time.
    Type: Grant
    Filed: August 25, 2000
    Date of Patent: December 6, 2005
    Assignee: XVD Corporation
    Inventors: Victor D. Kolesnik, Irina E. Bocharova, Boris D. Kudryashov, Andrey Marsavin, Victor Simileysky, Felix A. Taubin
  • Method and apparatus for audio compression
    Patent number: 6965859
    Abstract: A method and apparatus for audio compression receives an audio signal. Transform coding is applied to the audio signal to generate a sequence of transform frequency coefficients. The sequence of transform frequency coefficients is partitioned into a plurality of non-uniform width frequency ranges and then zero value frequency coefficients are inserted at the boundaries of the non-uniform width frequency ranges. As a result, certain of the transform frequency coefficients that represent high frequencies are dropped.
    Type: Grant
    Filed: March 3, 2003
    Date of Patent: November 15, 2005
    Assignee: XVD Corporation
    Inventors: Victor D. Kolesnik, Boris D. Kudryashov, Sergey Petrov, Evgeny Ovsyannikov, Boris Trojanovsky, Andrey Trofimov
  • Method and apparatus for object based motion compensation
    Patent number: 6954501
    Abstract: A method and apparatus for object based motion compensation forms objects from blocks of an input image based on motion similarity of the blocks in the input image and a reference image. In addition, object motion compensation vectors for each formed object and object relative block motion compensation vectors for each object's constituent blocks relative to the object's motion compensation vector are computed.
    Type: Grant
    Filed: February 17, 2003
    Date of Patent: October 11, 2005
    Assignee: XVD Corporation
    Inventors: Dmitry Skripin, Andrey Marsavin, Irina Bocharova, IIya Asnis, Andrei Morozov
  • Vector quantization with a non-structured codebook for audio compression
    Patent number: 6952671
    Abstract: According to one embodiment of the invention, a multistage vector list quantizer comprises a first stage quantizer to select candidate first stage codewords from a plurality of first stage codewords, a reference table memory storing a set of second stage codewords for each first stage codeword, and a second stage codebook constructor to generate a reduced complexity second stage codebook that is the union of sets corresponding to the candidate first stage codewords selected by the first stage quantizer.
    Type: Grant
    Filed: August 25, 2000
    Date of Patent: October 4, 2005
    Assignee: XVD Corporation
    Inventors: Victor Kolesnik, Boris Kudryashov, Eugeny Ovsjannikov, Sergey Petrov, Boris Trojanovsky