Patent ID: 7474703

Claim:
A VSB transmitter for transmitting a terrestrial broadcasting signal including main ATSC data and additional data, the VSB transmitter comprising: a main processor configured to change input data if it belongs to the main ATSC data, and to bypass the input data if it belongs to the additional data; a VSB mapper for mapping the input data outputted from the main processor into a corresponding signal; and a data format converter for formatting the signal output from the VSB mapper and transmitting the formatted data to one or more VSB receivers, wherein the data format converter comprises: a synchronizing multiplexer for multiplexing the signal outputted from the VSB mapper with a field synchronizing signal and segment synchronizing signals, a pilot inserter for inserting pilot signals into the multiplexed signal, a modulator for modulating the pilot-signals-inserted signal into an intermediate frequency (IF) signal, and a Radio Freguency (RF) converter for converting the modulated signal into a Radio Freguency (RF) signal for transmission.