Digital broadcasting system and data processing method that carries broadcast data using IP packets

A method of transmitting a broadcast signal in a transmitter, the method comprising:

• encoding data transmission units including broadcast data by adding parity data;
• interleaving the encoded broadcast data;
• encoding first signaling data, wherein the first signaling data includes transmission parameters of the encoded broadcast data;
• allocating the interleaved broadcast data and the encoded signaling data to a frame;
• modulating the frame;
• and
• transmitting the broadcast signal carrying the modulated frame,
• wherein the first signaling data includes a code rate of the data transmission unit and information for fast service acquisition,
• wherein the modulated frame includes second signaling data,
• wherein the second signaling data includes the fast service acquisition information for a receiver to locate upper layer signaling information,
• wherein the modulated frame carries transport packets,
• wherein a first transport packet carries IP packets including the broadcast data, and
• wherein a second transport packet carries service signaling data describing a service provided by the encoded broadcast data.