The present invention relates to provision of a method and/or a device for transmitting and receiving a broadcast signal on the basis of color gamut resampling. The method for transmitting a broadcast signal, according to one embodiment of the present invention, comprises the steps of; resampling first color gamut-based content data into second color gamut-based content data; generating signaling information which includes color gamut resampling information indicating information on the resampling; respectively.