Patent ID: 8619024

Claim:
A user station comprising: a) a video signal entry circuit carrying an uncompensated video signal; b) a video processing system having i) a video compensation circuit coupled to the video signal entry circuit, ii) a level shift circuit coupled to the video compensation circuit, iii) a zero volt clip circuit coupled to the level shift circuit, iv) an integration circuit coupled to the zero volt clip circuit, v) a sample and hold circuit coupled to the integration circuit, vi) a signal conditioning circuit coupled to the sample and hold circuit, vii) an analog to digital converter coupled to the sample and hold circuit, viii) a processor coupled to the sample and hold circuit and to the video compensation circuit, ix) a timing detection circuit coupled to the video signal entry circuit, x) a control pulse generation circuit coupled to the integration circuit, and coupled to the sample and hold circuit; and c) the timing detection circuit having a DC restoration circuit coupled to a fast comparator circuit, a synch extractor circuit coupled to a logic circuit in turn coupled to the DC restoration circuit, the fast comparator circuit is also coupled to the control pulse generation circuit.