1. A system for encoding a video stream into a processed video signal, the video stream including at least one image, the system comprising: a pattern detection module for detecting a pattern of interest in the at least one image and identifying a region that contains the pattern of interest when the pattern of interest is detected, wherein the pattern detection module includes a region detection module for detecting a detected region in the at least one image and wherein the region is based on the detected region; and wherein the region detection module generates a plurality of detection decisions in a corresponding plurality of domains and detects the detected region based on the plurality of detection decisions; and an encoder section, coupled to the region detection module, that generates the processed video signal, wherein, when the pattern of interest is detected, a higher quality is assigned to the region than to portions of the at least one image outside the region.