Fine-structure pre-emphasis for video signal transmission exploits the three-dimensional redundancy of video signals. Companding is required in fine-structure pre-emphasis to realize SNR improvement. Fine-structure pre-emphasis is modeled as an open-loop predictive system. Analysis shows that a modulo limiter can be incorporated in the preemphasis filters to limit the peak amplitude of the pre-emphasized signal. The reduced dynamic range will alleviate stringent requirement on companding.
Chung H. Lu, Chung H. Lu,
"Enhancement of video signal transmission using fine-structure pre-emphasis with modulo limiting," Optical Engineering 31(11), (1 November 1992). https://doi.org/10.1117/12.59993