Patents by Inventor Boris Trojanovsky

Boris Trojanovsky 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 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
  • 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
  • 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
  • Method and apparatus for audio compression
    Publication number: 20050159941
    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: Application
    Filed: March 11, 2005
    Publication date: July 21, 2005
    Inventors: Victor Kolesnik, Boris Kudryashov, Sergey Petrov, Evgeny Ovsyannikov, Boris Trojanovsky, Andrey Trofimov
  • Method and apparatus for audio compression
    Publication number: 20040172239
    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: Application
    Filed: March 3, 2003
    Publication date: September 2, 2004
    Applicant: Digital Stream USA, Inc.
    Inventors: Victor D. Kolesnik, Boris D. Kudryashov, Sergey Petrov, Evgeny Ovsyannikov, Boris Trojanovsky, Andrey Trofimov