Sync signal processing for asynchronously sampled video signals
R. Lares, Albrecht Rothermel · 2002
Digital sync signal processing for asynchronously digitized video signals is presented. A simplified matched filter for sync extraction and a linear prediction method for sync pulse filtering improves image stability significantly in comparison with a conventional phase-locked-loop (PLL) approach. Due to the linear prediction method, additional adaption to phase skips in the input signal (non-standard signals) may be easily realized. A suitable hardware realization such as an FIR-structure (finite impulse response) simplifies the linear prediction and analytical computation of the filter coefficients. Relaxed time constraints suggest a serial, area-reduced implementation of the filter structures.