公开(公告)号：US06952671B1

公开(公告)日：2005-10-04

申请号：US09649143

申请日：2000-08-25

申请人： Victor Kolesnik ,  Boris Kudryashov ,  Eugeny Ovsjannikov ,  Sergey Petrov ,  Boris Trojanovsky

发明人： Victor Kolesnik ,  Boris Kudryashov ,  Eugeny Ovsjannikov ,  Sergey Petrov ,  Boris Trojanovsky

IPC分类号： G10L19/00 ,  G10L19/06

CPC分类号： G10L19/07

摘要： 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.

摘要翻译： 根据本发明的一个实施例，多级向量列表量化器包括从多个第一级码字中选择候选第一级码字的第一级量化器，存储每个第一级码字的一组第二级码字的参考表存储器，以及 第二级码本构造器，用于生成与第一级量化器选择的候选第一级码字相对应的集合的并集的缩减复杂度的第二级码本。

公开(公告)号：US20050159941A1

公开(公告)日：2005-07-21

申请号：US11078975

申请日：2005-03-11

申请人： Victor Kolesnik ,  Boris Kudryashov ,  Sergey Petrov ,  Evgeny Ovsyannikov ,  Boris Trojanovsky ,  Andrey Trofimov

发明人： Victor Kolesnik ,  Boris Kudryashov ,  Sergey Petrov ,  Evgeny Ovsyannikov ,  Boris Trojanovsky ,  Andrey Trofimov

IPC分类号： G10L19/02 ,  G10L19/14 ,  G10L21/04 ,  H04B20060101 ,  H04B1/66

CPC分类号： G10L19/02

摘要： 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.