Digital broadcasting system and method of processing data in the digital broadcasting system

A broadcast transmitter for processing data, the broadcast transmitter comprising:

• a Forward Error Correction (FEC) encoder that encodes media service data for a broadcast service;
• a frame generator that forms first frames including the FEC-encoded media service data;
• and
• a transmitting device that transmits a second frame including the first frames,
• wherein the media service data includes first media data and second media data,
• wherein both of the first media data and the second media data represent perceptually equivalent content for the broadcast service, but the first media data is coded differently from the second media data,
• wherein the second frame includes first signaling information
• wherein the first signaling information includes information for seamless switching between the first media data and the second media data while presenting the equivalent content,
• wherein the first signaling information further includes information for a relative time difference to compensate a presentation start time of the first media data or the second media data, and
• wherein the second frame further includes second signaling information, the second signaling information including information for fast acquisition of the broadcast service.