The ATSC adopted the VSB transmission system because of its large bandwidth, which is needed to transmit HDTV (high definition television) programming. Critics, however, state that this larger bandwidth is irrelevant if customers cannot view the transmitted program because of multipath effects. When a signal is transmitted, it is met with obstructions such as canyons, buildings, and even people, which scatter the signal causing it to take two or more paths to reach its final destination, the television. The late arrival of the scattered portions of the signal cause ghost images. Multipath effects can occur simply by an individual walking into the room. For this reason, some consumers in metropolitan areas or areas with rugged terrain opt for cable television instead of fighting their antennas for better reception.transmission of data along with a television program (datacasting) because it supports large data payloads.