Patent ID: 7934243
Filing Date: 2011-04-26
Classification: H04H

Abstract:
1. A method of transmitting a broadcast signal in a transmitter, the method comprising: pre-processing, by a preprocessor, first service data comprising audio or video data for a mobile service, wherein the first service data is capable of being transmitted via a same channel as second service data comprising audio or video for a main service, and wherein pre-processing first service data comprises: multiplexing, by a multiplexer, the first service data packets and second service data packets, wherein the second service data packets include the second service data; performing, by a second encoder, systematic RS encoding on the second service data packets in the multiplexed data packets and non-systematic RS encoding on the first service data packets in the multiplexed data packets; and transmitting, by a transmission unit, a broadcast signal including the RS-encoded second service data packets and the RS-encoded first service data packets, wherein a parade of the formed data groups is transmitted during slots in the broadcast signal, the slots being basic time periods for multiplexing of the first service data and the second service data.