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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
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
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机译：使用格状结构的轨道搜索固定码本的方法和设备，其中每个轨道都是代数码本的轨道的并集
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摘要
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.
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