为解决特殊群体使用计算器困难的问题,设计了一种基于TMS320VC5509 DSP的可语音识别的计算器系统。该计算器系统的核心是采用HMM算法建立语音识别模型。通过对实时语音信号(数字、运算符号等语音)进行处理,将得到的参数与模板库参数进行匹配并加以识别,利用TMS320VC5509 DSP自带的计算模块实现语音信号整数100以内的加、减、乘、除等计算功能。实验结果表明,该计算器系统在低噪声场合和高噪声场合下识别率分别达到94.73%和76.55%。
- Abstract:
- In order to solve the problem of special groups to use the calculator difficultly,this paper described a calculator system of speech recognition based on TMS320VC5509 . The core of calculator system adopted the HMM algorithms to establish a model for speech recognition. Through real-time speech signals(numbers,operation symbols,etc.)processing,the parameters was matched with the template library and identified. Then the system took advantage of calculation module on the TMS320VC5509 DSP to realize 100 within the integer add,subtract, multiply,divide and other computing functions. The experimental results show that the recognition rate of the calculator system in the low-noise situations and high-noise situations reached 94.73% and 76.55% respectively,and achieved the purpose of design.
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