Sony DSP (digital signal processor) usually works with Sony CCD image sensor, there are lots of models: 3142 DSP, 3172 DSP, 4140 DSP(Effio-E), 4129 DSP(Effio-P), 4130 DSP(Effio-S), 4141 DSP(Effio-V), etc. Combination of Sony CCD and DSP, can improve the sensitivity and image clarity of the camera. We have cameras of 420TVL, 540TVL, 650TVL and 700TVL resolution which is of delicate image and stable operation. It supports 760H and 960H. Sony DSP camera is Popular and affordable.