| 摘要 |
<p>A device for transmitting digital broadcast signals comprises: at least a first encoding unit, each of which executes forward error correction encoding for data in a sub-channel; at least a time domain interleaving unit, each of which receives the output data from a first encoding unit and interleaves the data in time domain; a first multiplexing unit, for multiplexing the interleaved data in each sub-channel to form Main Service Channel (MSC) data; a second encoding unit, for executing forward error correction encoding for a second group of data information to acquire Fast Information Channel (FIC) data; a differential modulating unit, for performing differential modulation to FIC data adopting a first modulation mode, and performing differential modulation to MSC data adopting at least two modulation modes; wherein, the modulation level of the first modulation mode is lower than or equal to the modulation level of each modulation mode for MSC data; and a frame generating and transmitting unit, for generating signal unit transmission frames using differential modulation symbol sequences generated by the differential modulating unit and transmitting the signal unit transmission frames.</p> |
