The Picture Rearsearch System Of Non-watching Control Center In Railway Based On PSTN

Digital signal processor has strong operation capability, which is wide used for imaging process . In TMS320C3X, TMS320VC33 have the most strong operation capability reaching 150 MFLOPS. We make use of TMS320VC33 to design the image processingsystem. The system have follow characteristic:We used TLC5540 for digital converter, the maximumconversion rate of the TLC5540 is at least 40 MSPS (Mega SamplesPer Second), and the typical analog input bandwidth is more than75MHz. The design between TLC5540 and TMS320VC33 interfacedirectly. So we can reach higher conversion rate.Data processed with TMS320VC33 are transmitted to computer .The interface between TMS320VC33 and computer are used the common telephone network of 33. 6Kbps, the maximum transmit rate is l-10frame/s(CIF) 1-20 frame/s(QCIF). it is suit for a lot of data.Considering for program debugging, we used flash for programRom. Now we can modify program on-line. Have no use forprogram device.In the circuit, we used programmable logic device, whichimprove performance of the circuit. What is more, it can reduce area of circuit.At last, we program Virtual Device Driver and applicationprogramwith VC++6.0 and VTOOLS. The software can conveniencedisplay result processed difference arithmetic.