A discriminator without that constant fraction would just be a comparator. FM signals may be detected using a discriminator, ratio detector, or phase-locked loop. Each pixel has an independent discriminator and individual X-ray interactions trigger the readout process. The ratio detector has wider bandwidth but more distortion than the Foster-Seeley discriminator. The Foster-Seeley discriminator is a widely used FM detector. The ratio detector has wider bandwidth, but more distortion than the Foster-Seeley discriminator. The jitter can be further reduced by means of a constant fraction discriminator. VQ has been used to quantize the feature in the discriminator of GANs. A known dataset serves as the initial training data for the discriminator. Typically, a sound discriminator sensor can be eliminated using a shock sensor. Thereafter, candidates synthesized by the generator are evaluated by the discriminator. A sound discriminator or glass breakage sensor senses only the sound of glass breaking. The generator trains based on whether it succeeds in fooling the discriminator. Fisher also originated the concepts of sufficiency, ancillary statistics, Fisher's linear discriminator and Fisher information. He originated the concepts of sufficiency, ancillary statistics, Fisher's linear discriminator and Fisher information.