公开(公告)号：US07200557B2

公开(公告)日：2007-04-03

申请号：US10306367

申请日：2002-11-27

申请人： James G. Droppo ,  Alejandro Acero ,  Constantinos Boulis

发明人： James G. Droppo ,  Alejandro Acero ,  Constantinos Boulis

IPC分类号： G10L15/00

CPC分类号： G10L19/038 ,  G10L19/04 ,  G10L2019/0013

摘要： A method identifies a codeword to represent a vector derived from an audio signal by applying the vector to first and second decision trees. The first decision tree is associated with a first type of audio sound and produces a first codeword. The second decision tree is associated with a second type of audio sound and produces a second codeword. One of the first and second codewords is then selected as the codeword for the vector. In further embodiments, the vector describes the spectral content of the audio signal and a linear prediction value is generated for the vector. The difference between the linear prediction value and the vector is used to identify the codeword.

摘要翻译： 方法通过将向量应用于第一和第二决策树来识别代码字来表示从音频信号导出的向量。 第一决策树与第一类型的音频声音相关联并且产生第一码字。 第二决策树与第二类型的音频声音相关联并且产生第二码字。 然后选择第一和第二码字之一作为矢量的码字。 在另外的实施例中，矢量描述音频信号的频谱内容，并为矢量生成线性预测值。 线性预测值和向量之间的差异用于识别码字。