DEVICE OF TRANSCEIVING DIGITAL BROADCASTING VIDEO SIGNALS FOR IMPROVING COLOR PICTURE QUALITY AND METHOD THEREOF

PURPOSE: A device of transceiving digital broadcasting video signals is provided to add a step of reproducing constant luminance signals during gamma correction, to minimize color information lost during a conversion process, thereby reproducing colors that are not expressed in an existing broadcasting video signal. CONSTITUTION: An input unit inputs video signals. A camera gamma linearizer(301) converts the inputted video signals into linearized R, G, B video signals to remove gamma characteristics of a camera. A luminance signal calculator(302) calculates a luminance signal by using the linearized R, G, B video signals. A gamma converter(303) performs a gamma conversion for the calculated luminance signal and the linearized B, R video signals, by applying the gamma characteristics. A color difference signal calculator(304) calculates the gamma-converted B, R video signals as broadcasting color difference signals. An output unit outputs the gamma-converted luminance signal and the broadcasting color difference signals.