A video system, comprising: a camera system; and a video converter, the camera system including a first processing circuit (122, 123, 124) that generates, from a pixel signal generated by an image pickup unit that captures a subject and obtains a pixel signal thereof, a first video signal on a basis of a first dynamic range related image adjustment parameter, generates a second video signal from the pixel signal generated by the image pickup unit and provided on a first transmission channel on a basis of a second dynamic range related image adjustment parameter different from the first dynamic range related image adjustment parameter, and transmits transmission information including the first dynamic range related image adjustment parameter, the second dynamic range related image adjustment parameter and the second video signal via a main transmission channel, wherein a dynamic range of the second video signal is wider than a dynamic range of the first video signal the video converter receiving the transmission information via the main transmission channel and including a second processing circuit (201, 202, 203) that generates, on a basis of the second dynamic range related image adjustment parameter included in the transmission information, a restoration pixel signal by inverse-transforming the second video signal included in the transmission information, and also carries out dynamic range related adjustment processing corresponding to the first video signal on the restoration signal on a basis of the first dynamic range related image adjustment parameter included in the transmission information to generate an output video signal corresponding to the first video signal, wherein the dynamic range of the second video signal is wider than a dynamic range of the output video signal. a camera system; and a video converter, the camera system including a first processing circuit (122, 123, 124) that generates, from a pixel signal generated by an image pickup unit that captures a subject and obtains a pixel signal thereof, a first video signal on a basis of a first dynamic range related image adjustment parameter, generates a second video signal from the pixel signal generated by the image pickup unit and provided on a first transmission channel on a basis of a second dynamic range related image adjustment parameter different from the first dynamic range related image adjustment parameter, and transmits transmission information including the first dynamic range related image adjustment parameter, the second dynamic range related image adjustment parameter and the second video signal via a main transmission channel, wherein a dynamic range of the second video signal is wider than a dynamic range of the first video signal a first processing circuit (122, 123, 124) that generates, from a pixel signal generated by an image pickup unit that captures a subject and obtains a pixel signal thereof, a first video signal on a basis of a first dynamic range related image adjustment parameter, generates a second video signal from the pixel signal generated by the image pickup unit and provided on a first transmission channel on a basis of a second dynamic range related image adjustment parameter different from the first dynamic range related image adjustment parameter, and transmits transmission information including the first dynamic range related image adjustment parameter, the second dynamic range related image adjustment parameter and the second video signal via a main transmission channel, wherein a dynamic range of the second video signal is wider than a dynamic range of the first video signal the video converter receiving the transmission information via the main transmission channel and including a second processing circuit (201, 202, 203) that generates, on a basis of the second dynamic range related image adjustment parameter included in the transmission information, a restoration pixel signal by inverse-transforming the second video signal included in the transmission information, and also carries out dynamic range related adjustment processing corresponding to the first video signal on the restoration signal on a basis of the first dynamic range related image adjustment parameter included in the transmission information to generate an output video signal corresponding to the first video signal, wherein the dynamic range of the second video signal is wider than a dynamic range of the output video signal.