TAILIEUCHUNG - Báo cáo " Multiband fiR Filter Design and implementation to recover real- time corrupted input speech using dsk tms320c6711 "

In this paper, the five-band notch filter was designed using MATLAB and implemented by the floating-point digital signal processor TMS320C6711 based on TI's DSP starter kit (DSK) board connected to the parallel port of the PC through the DB25 cable included with the DSK package. The original segment of symphony orchestra corrupted two undesired sinusoids at frequencies of 750Hz and 1750Hz is conduced to input of DSK to produce the corrupted input signal which is saved in the wave file () for the digital signal processor. . | VNU. JOURNAL OF SCIENCE Mathematics - Physics N04 2005 MULTIBAND FIR FILTER DESIGN AND IMPLEMENTATION TO RECOVER REAL- TIME CORRUPTED INPUT SPEECH USING DSK TMS320C6711 Sung Ho Van Que Le Thanh Faculty of Electronics and Telecommunication College of Technology VNU Abstrac. In this paper the five-band notch filter was designed using MATLAB and implemented by the floating-point digital signal processor TMS320C6711 based on TI s DSP starter kit DSK board connected to the parallel port of the PC through the DB25 cable included with the DSK package. The original segment of symphony orchestra corrupted two undesired sinusoids at frequencies of 750Hz and 1750Hz is conduced to input of DSK to produce the corrupted input signal which is saved in the wave file for the digital signal processor. The two noise sinusoidal signals are generated by the real-time signal generator. The output signal of DSK is plotted on an digital oscilloscope on CCS window or on an earphones. 1. Introduction Filtering is one of the most useful signal processing operations. In this paper we employ the TI s DSK TMS320C6711 to implement Finite Impulse Response FIR digital filters for recovery a noise corrupted input speech-signal in real time. The TMS320C6x instruction set and architecture makes it well suited for such filtering operations. In the last few years the cost of digital signal processors has been reduced significantly therefore the using digital filters becomes popular because of it s high reliability accuracy and less sensitivity to temperature and ageing. The characteristics of digital filters such as center frequency bandwidth attenuation and filter type can be modified flexibly. A number of tools are available to design and implement the different FIR filters in real time. The FIR filters such as lowpass highpass bandpass bandstop and notch are now designed and implemented using DSK TMS 320C6711 in combination with MATLAB. These filters with high quality are .

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