1. A 3D video data processing method of a broadcast receiver, comprising: receiving, by a receiving unit, 3D video data which corresponds to half-resolution video data for a 3D content via a base layer, complementary video data for configuring a full-resolution image for the 3D content via an enhancement layer, and 3D complementary video information, wherein the 3D complementary video information includes complementary type information indicating a configuration type of the complementary video data and order information indicating a combination order of the half-resolution video data and the complementary video data; parsing, by a 3D video information processing unit, the 3D complementary video information; decoding, by a base video decoder, the half-resolution video data; decoding, by a complementary video decoder, the complementary video data for configuring a full-resolution image; and combining and formatting, by an output formatter, the half-resolution video data and the complementary video data using the complementary type information and the order information, thereby outputting a full-resolution 3D image.