The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 20, 2007
Filed:
Mar. 11, 2005
Victor D. Kolesnik, St. Petersburg, RU;
Boris D. Kudryashov, St. Petersburg, RU;
Sergey Petrov, St. Petersburg, RU;
Evgeny Ovsyannikov, St. Petersburg, RU;
Boris Trojanovsky, St. Petersburg, RU;
Andrey Trofimov, St. Petersburg, RU;
Victor D. Kolesnik, St. Petersburg, RU;
Boris D. Kudryashov, St. Petersburg, RU;
Sergey Petrov, St. Petersburg, RU;
Evgeny Ovsyannikov, St. Petersburg, RU;
Boris Trojanovsky, St. Petersburg, RU;
Andrey Trofimov, St. Petersburg, RU;
XVD Corporation, Fremont, CA (US);
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.