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公开(公告)号：US07919706B2
公开(公告)日：2011-04-05
申请号：US11953215
申请日：2007-12-10
申请人： Chi-ying Tsui , Bertram Shi , Chi Wai Yung
发明人： Chi-ying Tsui , Bertram Shi , Chi Wai Yung
CPC分类号： G10H3/125 , G09B15/023 , G10H1/0008 , G10H2210/066 , G10H2210/076 , G10H2240/111 , G10H2240/141 , G10H2240/251 , G10H2240/305 , G10H2250/031 , G10H2250/135 , G10H2250/645
摘要： A music retrieval system which take an input melody as the query. In one embodiment, changes or differences in the distribution of energy across the frequency spectrum over time are used to find breakpoints in the input melody in order to separate it into distinct notes. In another embodiment the breakpoints are identified based on changes in pitch over time. A confidence level is preferably associated with each breakpoint and/or note extracted from the input melody. The confidence level is based on one or more of: changes in pitch, absolute values of a spectral energy distribution indicator, relative values of the spectral energy distribution indicator, and the energy level of the input melody. The process of matching the input melody with songs in the music database is based on minimizing a cost computation that takes into account errors in the insertion and deletion of notes, and penalizes these errors in accordance with the confidence levels of the breakpoints and/or notes.
摘要翻译： 作为查询输入旋律的音乐检索系统。 在一个实施例中，使用随时间推移的频谱上的能量分布的变化或差异来找到输入旋律中的断点，以便将其分离成不同的音符。 在另一个实施例中，基于随时间变化的音调来识别断点。 置信水平优选地与从输入旋律提取的每个断点和/或音符相关联。 置信水平基于以下中的一个或多个：音调的变化，频谱能量分布指示器的绝对值，频谱能量分布指示器的相对值和输入旋律的能量水平。 将音乐数据库中的输入曲调与歌曲相匹配的过程基于最小化考虑到插入和删除音符中的错误的成本计算，并根据断点和/或音符的置信水平惩罚这些错误 。
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公开(公告)号：US06070263A
公开(公告)日：2000-05-30
申请号：US62685
申请日：1998-04-20
CPC分类号： H03M13/6502 , H03M13/3961 , H03M13/4107
摘要： A circuit for use in the add-compare-select circuit of a Viterbi decoder to determine the maximum likelihood path through states in a coding trellis uses a modified butterfly structure. Selection registers select between branch metric values at time i and partial path metric values at time i-1 in dependence on comparisons of branch metric difference values at time i and partial path metric difference values at time i-1. The selected values are added to provide new partial path metric at time i. The circuit provides a significant reduction in power consumption and area over conventional designs.
摘要翻译： 用于维特比解码器的加法比较选择电路以确定通过编码网格中的状态的最大似然路径的电路使用修改的蝴蝶结构。 选择寄存器根据时间i的分支量度差值和时间i-1的部分路径度量差值，在时间i的分支度量值和时间i-1处的部分路径量度值之间进行选择。 添加所选择的值以在时间i提供新的部分路径度量。 与常规设计相比，该电路显着降低了功耗和面积。
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