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Invention Grant
US08805681B2 Method and apparatus to search fixed codebook using tracks of a trellis structure with each track being a union of tracks of an algebraic codebook 有权
使用网格结构的轨道来搜索固定码本的方法和装置，每个轨道是代数码本的轨道的并集

Method and apparatus to search fixed codebook using tracks of a trellis structure with each track being a union of tracks of an algebraic codebook
Abstract:
A method and apparatus to search a codebook including pulses that model a predetermined component of a speech signal. The method includes the operations of selecting a predetermined number of paths corresponding to a predetermined number of pulse locations that are most consistent with the predetermined component, from among paths corresponding to pulse locations of a predetermined pulse location set allocated to at least one branch that connects one state of a predetermined Trellis structure to another state, performing the path selecting operation on each of states other than the one state, and selecting a path corresponding to pulse locations that are most consistent with the predetermined component, from among paths including the selected paths, wherein each path corresponds to a union of plural tracks of an Algebraic codebook. Accordingly, the number of calculations required during a codebook search is reduced.
Abstract(Chinese):

一种搜索包括对语音信号的预定分量进行建模的脉冲的码本的方法和装置。 该方法包括从对应于分配给连接至少一个分支的预定脉冲位置集的脉冲位置的路径中选择对应于与预定分量最一致的预定数量的脉冲位置的预定数量的路径的操作 将预定网格结构的一个状态转换到另一状态，对除了一个状态以外的状态执行路径选择操作，并且从包括所选择的路径的路径中选择对应于与预定分量最一致的脉冲位置的路径 ，其中每个路径对应于代数码本的多个轨道的并集。 因此，减少码本搜索期间所需的计算次数。

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