Efficient DTMF Detection based on Zynq 7000 Series of FPGA

Abstract

Dual-tone multi-frequency (DTMF) is a signaling standard in telecom applications that produces two tones simultaneously for each key press. By using efficient DTMF, this project divided into three phase’s i.e.  FFT, Split Goertzel Algorthim without Resource Sharing Approach, Split Goertzel Algorthim with Resource Sharing Approach. In these three phases we analyze area, timing & power.  First phase is Fast Fourier Transform (FFT). In FFT, recursive operation is repeated N times. So that in FFT it requires more hardware, power & time. Second phase is spilt Goertzel Algorthim without Resource Sharing Approach. For high speed tone detection third technique i.e, Split Goertzel Algorthim with Resource Sharing Approach is used. Here, it uses predetermined frequencies& very minimal set of hardware,scheduled inputs & outputs are used at appropriate clock edges. So that it consumes less area & power. To detect DTMF detection a new type of ZYBO board ZYNQ 7000 series FPGA is used.  Zynq is the combination of software &hardware systems. For functional verification Mentor Graphics Modelsim is used and for synthesis Xilinx ISE is used.