Study On Voice Signal Filtering Based On DSP

The pronunciation filter technology is one of the important speech signal processing research field, with the high speed digital signal processing technology development, DSP chip has become the main tool speech signal processing DSP chip in single chip, real time realization complex on speech decoding algorithm, and can be easily algorithm, which are not update the circumstances change hardware function of upgrades. Speech signal filter is speech processing system research, one of the key questions will directly influence the effect filter, and the quality of speech signals DSP technology unceasing enhancement, to ensure the filtering effect of real-time and accuracy, and how the speech signal filtering techniques transplanted into DSP will become an important on the problem. Appropriate model, reasonably determine the algorithm, selected parameters and design feasible system is the main content of this research.Aiming at the characteristics of speech signals, first of traditional speech processing methods are analyzed by CCS software is based, with DSP peculiar, mixing programming means to realize the classic FIR filter and IIR filter, then use TI company 5000 series DSP - TMS320VC5509 as the core chip, design a phonic acquisition and filtering systems, by CCS platform and DSP programming based on han Ming window, the filtering algorithm in selecting experiment under the condition of different input signal to compare the effect of filter, verify the feasibility of the method is studied in this paper.Results show that: use this paper used the speech signal processing algorithm, gathering all kinds of environment different speech input signal noise, and achieved good effect.