| 可配置语音识别输出概率计算协处理器的设计 |
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| 引用本文： | 梁维谦,刘国旗,杨华中.可配置语音识别输出概率计算协处理器的设计[J].清华大学学报(自然科学版),2010(4). |
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| 作者姓名： | 梁维谦 刘国旗 杨华中 |
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| 作者单位： | 清华大学电子工程系;清华大学微电子学研究所; |
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| 基金项目： | 国家“八六三”高技术研究发展计划重点项目(2008AA010700) |
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| 摘 要： | 在基于连续隐含Markov模型的嵌入式语音识别系统中,为提升计算效率、降低系统功耗,将算法中计算消耗最大的输出概率计算模块作为协处理器实现。通过先入先出队列电路隔离输出概率计算中的Markov距离和对数加法的数据通路使得系统参数可以灵活配置,并根据输出概率计算所需参数的地址产生规则设计了地址产生单元。采用Xilinx Virtex-5系列FPGA实现了该输出概率协处理器,并通过S3C44B0X微控制器验证了该设计。在配置参数为3维Gauss混合分量、27维特征矢量的条件下,对358个状态,协处理器工作在27MHz的时钟频率时计算输出概率的处理速度达到了0.13倍实时。
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| 关 键 词： | 语音识别 输出概率计算 并行计算 FIFO |
Design of a configurable output probability calculation coprocessor for speech recognition |
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| LIANGWeiqian,LIGuoqi,YANGHuazhong.Design of a configurable output probability calculation coprocessor for speech recognition[J].Journal of Tsinghua University(Science and Technology),2010(4). |
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| Authors: | LIANGWeiqian LIGuoqi YANGHuazhong |
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| Institution: | LIANG+Weiqian1,LI+Guoqi2,YANG+Huazhong1(1.+Department+of+Electronic+Engineering,Tsinghua+University,Beijing+100084,China,2.+Institute+of+Microelectronics,China) |
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| Abstract: | The most time-consuming output probability in embedded speech recognition systems based on the continuous hidden Markov model was computed using a configurable co-processor to promote the computation efficiency and lower the system power consumption. The output probability calculation (OPC) includes the Mahalanobis distance and the add-log modules with a FIFO used to separate these two circuits,therefore,making the designed system more configurable. The address generation unit was also specially designed fo... |
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| Keywords: | speech recognition output probability calculation parallel computing FIFO |
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