A speech signal acquisition system based on 16-bit fixed-point DSP TMS320VC5410 is designed. The system uses the SIGMA-DELTA type single-chip analog interface chip TLC320AD50C which integrates ADC and DAC. FIFO technology is used for caching, CPLD is used for control logic, and EZ-USB peripheral interface device is used for serial communication. The hardware structure and software programming ideas and implementation methods of the system are mainly introduced. After testing, the human ear can not feel the distortion of the speech signal playback.
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