Broadcast signal transmitting device and broadcast signal transmitting method which use channel bonding

An apparatus of receiving a broadcast signal, comprising:

• RF receiving units configured to receive RF transmission signals transmitted by using channel bonding of multiple RF channels;
• and
• a stream combiner configured to generate data corresponding to a single physical layer pipe (PLP) using a plurality of partitioned streams corresponding to a plurality of packet types,
• wherein the plurality of partitioned streams correspond to baseband packets corresponding to the plurality of packet types,
• wherein the channel bonding is performed in one of a plain channel bonding mode and a SNR averaging channel bonding mode, and cell exchanging is used for the SNR averaging channel bonding mode and the cell exchanging is not used for the plane channel bonding mode,
• wherein the channel bonding spreads data of the single physical layer pipe across the multiple RF channels, and
• wherein baseband packets corresponding to one of the plurality of packet types are generated by using a baseband packet length corresponding to BICM parameters for one of the multiple RF channels and no more than five consecutive baseband packets are assigned to the same RF channel when the plain channel bonding mode is used.