TRANSMITTING/RECEIVING SYSTEM AND BROADCAST SIGNAL PROCESSING METHOD

摘要

The present invention relates to a transmitting system, to a receiving system, and to a broadcast signal processing method. The transmitting system comprises an RS frame decoder, a block processor, a group formatter, and a trellis encoding unit. The RS frame decoder performs an error correction coding process on an RS frame payload containing mobile service data to form an RS frame, divides the RS frame into a plurality of portions, and outputs the divided frame. The block processor performs either a 1/2 encoding process or a 1/4 encoding process on each bit of mobile service data of each portion. The group formatter maps the portion containing symbols of the 1/4 encoded mobile service data and symbols of the 1/2 encoded mobile service data to the relevant regions of a data group. The trellis encoding unit performs a trellis encoding process on the symbols of the 1/4 encoded mobile service data of the data group and the symbols of the 1/2 encoded mobile service data of the data group.