To favorably transmit both of HDR image data and LDR image data. First transmission image data and second transmission image data are divided into layers and encoded, the first transmission image data being obtained by applying photo-electric conversion to first input image data having a contrast ratio of from 0 to 100% to brightness of a white peak of a conventional LDR image, and the second transmission image data being obtained by applying photo-electric conversion to second input image data having a contrast ratio of from 0 to 100%*N (N is a number larger than 1), the contrast ratio exceeding the brightness of the conventional white peak, and a video stream having encoded image data of pictures of the layers is generated. A container in a predetermined format including the video stream is transmitted.